[PATCH 0/6] perf header: Save and reuse feature information in header (v5)

[PATCH 0/6] perf header: Save and reuse feature information in header (v5)

[Namhyung Kim]

Hi,

Currently the perf header information is used only at initial setup
time and discarded.  If it's saved we could reuse the information for
various purpose - for instance, perf kvm stat needs to know cpuid so
it had to invent an accessor.

Thanks,
Namhyung


v4 -> v5:
 * Use saved cpuid info for perf kvm (David)

v3 -> v4:
 * rename perf_header_info to perf_session_env (Arnaldo)

v2 -> v3:
 * patch 1-3 in v2 merged into tip
 * rebased on current acme/perf/core

v1 -> v2:
 * not touch EVENT_DESC feature handling
 * split out struct perf_header_info
 * simplify multi-string handling
 * add some cleanup patches

Namhyung Kim (6):
  perf header: Add struct perf_session_env
  perf header: Add ->process callbacks to most of features
  perf header: Use pre-processed session env when printing
  perf header: Remove unused @feat arg from ->process callback
  perf kvm: Use perf_session_env for reading cpuid
  perf header: Remove perf_header__read_feature

 tools/perf/builtin-kvm.c |  10 +-
 tools/perf/util/header.c | 598 ++++++++++++++++++++++++++++++-----------------
 tools/perf/util/header.h |  25 +-
 3 files changed, 406 insertions(+), 227 deletions(-)

-- 
1.7.11.4

[PATCH 1/6] perf header: Add struct perf_session_env

[Namhyung Kim]

From: Namhyung Kim <namhyung.kim@lge.com>

The struct perf_session_env will preserve environment information at
the time of perf record.  It can be accessed anytime after parsing a
perf.data file if needed.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/header.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 58de08b21bce..5867c7d74f97 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -58,6 +58,29 @@ struct perf_header;
 int perf_file_header__read(struct perf_file_header *header,
 			   struct perf_header *ph, int fd);
 
+struct perf_session_env {
+	char			*hostname;
+	char			*os_release;
+	char			*version;
+	char			*arch;
+	int			nr_cpus_online;
+	int			nr_cpus_avail;
+	char			*cpu_desc;
+	char			*cpuid;
+	unsigned long long	total_mem;
+
+	int			nr_cmdline;
+	char			*cmdline;
+	int			nr_sibling_cores;
+	char			*sibling_cores;
+	int			nr_sibling_threads;
+	char			*sibling_threads;
+	int			nr_numa_nodes;
+	char			*numa_nodes;
+	int			nr_pmu_mappings;
+	char			*pmu_mappings;
+};
+
 struct perf_header {
 	int			frozen;
 	bool			needs_swap;
@@ -67,6 +90,7 @@ struct perf_header {
 	u64			event_offset;
 	u64			event_size;
 	DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
+	struct perf_session_env env;
 };
 
 struct perf_evlist;
-- 
1.7.11.4

[tip:perf/core] perf header: Add struct perf_session_env

[tip-bot for Namhyung Kim]

Commit-ID:  e93699b3c7aeb13eee473b1dc36cbe3a8a0ca397
Gitweb:     http://git.kernel.org/tip/e93699b3c7aeb13eee473b1dc36cbe3a8a0ca397
Author:     Namhyung Kim <namhyung.kim@lge.com>
AuthorDate: Mon, 24 Sep 2012 17:14:58 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 24 Sep 2012 11:44:05 -0300

perf header: Add struct perf_session_env

The struct perf_session_env will preserve environment information at the
time of perf record.  It can be accessed anytime after parsing a
perf.data file if needed.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1348474503-15070-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/header.h |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 58de08b..5867c7d 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -58,6 +58,29 @@ struct perf_header;
 int perf_file_header__read(struct perf_file_header *header,
 			   struct perf_header *ph, int fd);
 
+struct perf_session_env {
+	char			*hostname;
+	char			*os_release;
+	char			*version;
+	char			*arch;
+	int			nr_cpus_online;
+	int			nr_cpus_avail;
+	char			*cpu_desc;
+	char			*cpuid;
+	unsigned long long	total_mem;
+
+	int			nr_cmdline;
+	char			*cmdline;
+	int			nr_sibling_cores;
+	char			*sibling_cores;
+	int			nr_sibling_threads;
+	char			*sibling_threads;
+	int			nr_numa_nodes;
+	char			*numa_nodes;
+	int			nr_pmu_mappings;
+	char			*pmu_mappings;
+};
+
 struct perf_header {
 	int			frozen;
 	bool			needs_swap;
@@ -67,6 +90,7 @@ struct perf_header {
 	u64			event_offset;
 	u64			event_size;
 	DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
+	struct perf_session_env env;
 };
 
 struct perf_evlist;

[PATCH 2/6] perf header: Add ->process callbacks to most of features

[Namhyung Kim]

>From now on each feature information is processed and saved in perf
header so that it can be used wherever needed.  The BRANCH_STACK
feature is an exception since it needs nothing to be done.

Cc: Stephane Eranian <eranian@google.com>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/header.c | 319 +++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 308 insertions(+), 11 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index ad72b2814ba8..d74b58d4105d 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -22,6 +22,7 @@
 #include "cpumap.h"
 #include "pmu.h"
 #include "vdso.h"
+#include "strbuf.h"
 
 static bool no_buildid_cache = false;
 
@@ -1673,6 +1674,99 @@ static int process_build_id(struct perf_file_section *section,
 	return 0;
 }
 
+static int process_hostname(struct perf_file_section *section __maybe_unused,
+			    struct perf_header *ph, int feat __maybe_unused,
+			    int fd, void *data __maybe_unused)
+{
+	ph->env.hostname = do_read_string(fd, ph);
+	return ph->env.hostname ? 0 : -ENOMEM;
+}
+
+static int process_osrelease(struct perf_file_section *section __maybe_unused,
+			     struct perf_header *ph, int feat __maybe_unused,
+			     int fd, void *data __maybe_unused)
+{
+	ph->env.os_release = do_read_string(fd, ph);
+	return ph->env.os_release ? 0 : -ENOMEM;
+}
+
+static int process_version(struct perf_file_section *section __maybe_unused,
+			   struct perf_header *ph, int feat __maybe_unused,
+			   int fd, void *data __maybe_unused)
+{
+	ph->env.version = do_read_string(fd, ph);
+	return ph->env.version ? 0 : -ENOMEM;
+}
+
+static int process_arch(struct perf_file_section *section __maybe_unused,
+			struct perf_header *ph, int feat __maybe_unused,
+			int fd, void *data __maybe_unused)
+{
+	ph->env.arch = do_read_string(fd, ph);
+	return ph->env.arch ? 0 : -ENOMEM;
+}
+
+static int process_nrcpus(struct perf_file_section *section __maybe_unused,
+			  struct perf_header *ph, int feat __maybe_unused,
+			  int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	u32 nr;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_cpus_online = nr;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_cpus_avail = nr;
+	return 0;
+}
+
+static int process_cpudesc(struct perf_file_section *section __maybe_unused,
+			   struct perf_header *ph, int feat __maybe_unused,
+			   int fd, void *data __maybe_unused)
+{
+	ph->env.cpu_desc = do_read_string(fd, ph);
+	return ph->env.cpu_desc ? 0 : -ENOMEM;
+}
+
+static int process_cpuid(struct perf_file_section *section __maybe_unused,
+			 struct perf_header *ph, int feat __maybe_unused,
+			 int fd, void *data __maybe_unused)
+{
+	ph->env.cpuid = do_read_string(fd, ph);
+	return ph->env.cpuid ? 0 : -ENOMEM;
+}
+
+static int process_total_mem(struct perf_file_section *section __maybe_unused,
+			     struct perf_header *ph, int feat __maybe_unused,
+			     int fd, void *data __maybe_unused)
+{
+	uint64_t mem;
+	size_t ret;
+
+	ret = read(fd, &mem, sizeof(mem));
+	if (ret != sizeof(mem))
+		return -1;
+
+	if (ph->needs_swap)
+		mem = bswap_64(mem);
+
+	ph->env.total_mem = mem;
+	return 0;
+}
+
 static char *read_cpuid(struct perf_header *ph, int fd)
 {
 	return do_read_string(fd, ph);
@@ -1728,6 +1822,208 @@ process_event_desc(struct perf_file_section *section __maybe_unused,
 	return 0;
 }
 
+static int process_cmdline(struct perf_file_section *section __maybe_unused,
+			   struct perf_header *ph, int feat __maybe_unused,
+			   int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	char *str;
+	u32 nr, i;
+	struct strbuf sb;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_cmdline = nr;
+	strbuf_init(&sb, 128);
+
+	for (i = 0; i < nr; i++) {
+		str = do_read_string(fd, ph);
+		if (!str)
+			goto error;
+
+		/* include a NULL character at the end */
+		strbuf_add(&sb, str, strlen(str) + 1);
+		free(str);
+	}
+	ph->env.cmdline = strbuf_detach(&sb, NULL);
+	return 0;
+
+error:
+	strbuf_release(&sb);
+	return -1;
+}
+
+static int process_cpu_topology(struct perf_file_section *section __maybe_unused,
+				struct perf_header *ph, int feat __maybe_unused,
+				int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	u32 nr, i;
+	char *str;
+	struct strbuf sb;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_sibling_cores = nr;
+	strbuf_init(&sb, 128);
+
+	for (i = 0; i < nr; i++) {
+		str = do_read_string(fd, ph);
+		if (!str)
+			goto error;
+
+		/* include a NULL character at the end */
+		strbuf_add(&sb, str, strlen(str) + 1);
+		free(str);
+	}
+	ph->env.sibling_cores = strbuf_detach(&sb, NULL);
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_sibling_threads = nr;
+
+	for (i = 0; i < nr; i++) {
+		str = do_read_string(fd, ph);
+		if (!str)
+			goto error;
+
+		/* include a NULL character at the end */
+		strbuf_add(&sb, str, strlen(str) + 1);
+		free(str);
+	}
+	ph->env.sibling_threads = strbuf_detach(&sb, NULL);
+	return 0;
+
+error:
+	strbuf_release(&sb);
+	return -1;
+}
+
+static int process_numa_topology(struct perf_file_section *section __maybe_unused,
+				 struct perf_header *ph, int feat __maybe_unused,
+				 int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	u32 nr, node, i;
+	char *str;
+	uint64_t mem_total, mem_free;
+	struct strbuf sb;
+
+	/* nr nodes */
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		goto error;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_numa_nodes = nr;
+	strbuf_init(&sb, 256);
+
+	for (i = 0; i < nr; i++) {
+		/* node number */
+		ret = read(fd, &node, sizeof(node));
+		if (ret != sizeof(node))
+			goto error;
+
+		ret = read(fd, &mem_total, sizeof(u64));
+		if (ret != sizeof(u64))
+			goto error;
+
+		ret = read(fd, &mem_free, sizeof(u64));
+		if (ret != sizeof(u64))
+			goto error;
+
+		if (ph->needs_swap) {
+			node = bswap_32(node);
+			mem_total = bswap_64(mem_total);
+			mem_free = bswap_64(mem_free);
+		}
+
+		strbuf_addf(&sb, "%u:%"PRIu64":%"PRIu64":",
+			    node, mem_total, mem_free);
+
+		str = do_read_string(fd, ph);
+		if (!str)
+			goto error;
+
+		/* include a NULL character at the end */
+		strbuf_add(&sb, str, strlen(str) + 1);
+		free(str);
+	}
+	ph->env.numa_nodes = strbuf_detach(&sb, NULL);
+	return 0;
+
+error:
+	strbuf_release(&sb);
+	return -1;
+}
+
+static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
+				struct perf_header *ph, int feat __maybe_unused,
+				int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	char *name;
+	u32 pmu_num;
+	u32 type;
+	struct strbuf sb;
+
+	ret = read(fd, &pmu_num, sizeof(pmu_num));
+	if (ret != sizeof(pmu_num))
+		return -1;
+
+	if (ph->needs_swap)
+		pmu_num = bswap_32(pmu_num);
+
+	if (!pmu_num) {
+		pr_debug("pmu mappings not available\n");
+		return 0;
+	}
+
+	ph->env.nr_pmu_mappings = pmu_num;
+	strbuf_init(&sb, 128);
+
+	while (pmu_num) {
+		if (read(fd, &type, sizeof(type)) != sizeof(type))
+			goto error;
+		if (ph->needs_swap)
+			type = bswap_32(type);
+
+		name = do_read_string(fd, ph);
+		if (!name)
+			goto error;
+
+		strbuf_addf(&sb, "%u:%s", type, name);
+		/* include a NULL character at the end */
+		strbuf_add(&sb, "", 1);
+
+		free(name);
+		pmu_num--;
+	}
+	ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
+	return 0;
+
+error:
+	strbuf_release(&sb);
+	return -1;
+}
+
 struct feature_ops {
 	int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
 	void (*print)(struct perf_header *h, int fd, FILE *fp);
@@ -1745,10 +2041,11 @@ struct feature_ops {
 		.process = process_##func }
 #define FEAT_OPF(n, func) \
 	[n] = { .name = #n, .write = write_##func, .print = print_##func, \
-		.full_only = true }
+		.process = process_##func, .full_only = true }
 #define FEAT_OPA_R(n, func) \
 	[n] = { .name = #n, .write = write_##func, .print = print_##func, \
-		.read  = read_##func }
+		.read  = read_##func, .process = process_##func, \
+		.full_only = true }
 
 /* feature_ops not implemented: */
 #define print_tracing_data	NULL
@@ -1757,20 +2054,20 @@ struct feature_ops {
 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
 	FEAT_OPP(HEADER_TRACING_DATA,	tracing_data),
 	FEAT_OPP(HEADER_BUILD_ID,	build_id),
-	FEAT_OPA(HEADER_HOSTNAME,	hostname),
-	FEAT_OPA(HEADER_OSRELEASE,	osrelease),
-	FEAT_OPA(HEADER_VERSION,	version),
-	FEAT_OPA(HEADER_ARCH,		arch),
-	FEAT_OPA(HEADER_NRCPUS,		nrcpus),
-	FEAT_OPA(HEADER_CPUDESC,	cpudesc),
+	FEAT_OPP(HEADER_HOSTNAME,	hostname),
+	FEAT_OPP(HEADER_OSRELEASE,	osrelease),
+	FEAT_OPP(HEADER_VERSION,	version),
+	FEAT_OPP(HEADER_ARCH,		arch),
+	FEAT_OPP(HEADER_NRCPUS,		nrcpus),
+	FEAT_OPP(HEADER_CPUDESC,	cpudesc),
 	FEAT_OPA_R(HEADER_CPUID,	cpuid),
-	FEAT_OPA(HEADER_TOTAL_MEM,	total_mem),
+	FEAT_OPP(HEADER_TOTAL_MEM,	total_mem),
 	FEAT_OPP(HEADER_EVENT_DESC,	event_desc),
-	FEAT_OPA(HEADER_CMDLINE,	cmdline),
+	FEAT_OPP(HEADER_CMDLINE,	cmdline),
 	FEAT_OPF(HEADER_CPU_TOPOLOGY,	cpu_topology),
 	FEAT_OPF(HEADER_NUMA_TOPOLOGY,	numa_topology),
 	FEAT_OPA(HEADER_BRANCH_STACK,	branch_stack),
-	FEAT_OPA(HEADER_PMU_MAPPINGS,	pmu_mappings),
+	FEAT_OPP(HEADER_PMU_MAPPINGS,	pmu_mappings),
 };
 
 struct header_print_data {
-- 
1.7.11.4

[tip:perf/core] perf header: Add -> process callbacks to most of features

[tip-bot for Namhyung Kim]

Commit-ID:  a1ae565528757f26d315897929b6fe58c5647915
Gitweb:     http://git.kernel.org/tip/a1ae565528757f26d315897929b6fe58c5647915
Author:     Namhyung Kim <namhyung@kernel.org>
AuthorDate: Mon, 24 Sep 2012 17:14:59 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 24 Sep 2012 11:45:22 -0300

perf header: Add ->process callbacks to most of features

>From now on each feature information is processed and saved in perf
header so that it can be used wherever needed.  The BRANCH_STACK feature
is an exception since it needs nothing to be done.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1348474503-15070-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/header.c |  319 ++++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 308 insertions(+), 11 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index ad72b28..d74b58d 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -22,6 +22,7 @@
 #include "cpumap.h"
 #include "pmu.h"
 #include "vdso.h"
+#include "strbuf.h"
 
 static bool no_buildid_cache = false;
 
@@ -1673,6 +1674,99 @@ static int process_build_id(struct perf_file_section *section,
 	return 0;
 }
 
+static int process_hostname(struct perf_file_section *section __maybe_unused,
+			    struct perf_header *ph, int feat __maybe_unused,
+			    int fd, void *data __maybe_unused)
+{
+	ph->env.hostname = do_read_string(fd, ph);
+	return ph->env.hostname ? 0 : -ENOMEM;
+}
+
+static int process_osrelease(struct perf_file_section *section __maybe_unused,
+			     struct perf_header *ph, int feat __maybe_unused,
+			     int fd, void *data __maybe_unused)
+{
+	ph->env.os_release = do_read_string(fd, ph);
+	return ph->env.os_release ? 0 : -ENOMEM;
+}
+
+static int process_version(struct perf_file_section *section __maybe_unused,
+			   struct perf_header *ph, int feat __maybe_unused,
+			   int fd, void *data __maybe_unused)
+{
+	ph->env.version = do_read_string(fd, ph);
+	return ph->env.version ? 0 : -ENOMEM;
+}
+
+static int process_arch(struct perf_file_section *section __maybe_unused,
+			struct perf_header *ph, int feat __maybe_unused,
+			int fd, void *data __maybe_unused)
+{
+	ph->env.arch = do_read_string(fd, ph);
+	return ph->env.arch ? 0 : -ENOMEM;
+}
+
+static int process_nrcpus(struct perf_file_section *section __maybe_unused,
+			  struct perf_header *ph, int feat __maybe_unused,
+			  int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	u32 nr;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_cpus_online = nr;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_cpus_avail = nr;
+	return 0;
+}
+
+static int process_cpudesc(struct perf_file_section *section __maybe_unused,
+			   struct perf_header *ph, int feat __maybe_unused,
+			   int fd, void *data __maybe_unused)
+{
+	ph->env.cpu_desc = do_read_string(fd, ph);
+	return ph->env.cpu_desc ? 0 : -ENOMEM;
+}
+
+static int process_cpuid(struct perf_file_section *section __maybe_unused,
+			 struct perf_header *ph, int feat __maybe_unused,
+			 int fd, void *data __maybe_unused)
+{
+	ph->env.cpuid = do_read_string(fd, ph);
+	return ph->env.cpuid ? 0 : -ENOMEM;
+}
+
+static int process_total_mem(struct perf_file_section *section __maybe_unused,
+			     struct perf_header *ph, int feat __maybe_unused,
+			     int fd, void *data __maybe_unused)
+{
+	uint64_t mem;
+	size_t ret;
+
+	ret = read(fd, &mem, sizeof(mem));
+	if (ret != sizeof(mem))
+		return -1;
+
+	if (ph->needs_swap)
+		mem = bswap_64(mem);
+
+	ph->env.total_mem = mem;
+	return 0;
+}
+
 static char *read_cpuid(struct perf_header *ph, int fd)
 {
 	return do_read_string(fd, ph);
@@ -1728,6 +1822,208 @@ process_event_desc(struct perf_file_section *section __maybe_unused,
 	return 0;
 }
 
+static int process_cmdline(struct perf_file_section *section __maybe_unused,
+			   struct perf_header *ph, int feat __maybe_unused,
+			   int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	char *str;
+	u32 nr, i;
+	struct strbuf sb;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_cmdline = nr;
+	strbuf_init(&sb, 128);
+
+	for (i = 0; i < nr; i++) {
+		str = do_read_string(fd, ph);
+		if (!str)
+			goto error;
+
+		/* include a NULL character at the end */
+		strbuf_add(&sb, str, strlen(str) + 1);
+		free(str);
+	}
+	ph->env.cmdline = strbuf_detach(&sb, NULL);
+	return 0;
+
+error:
+	strbuf_release(&sb);
+	return -1;
+}
+
+static int process_cpu_topology(struct perf_file_section *section __maybe_unused,
+				struct perf_header *ph, int feat __maybe_unused,
+				int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	u32 nr, i;
+	char *str;
+	struct strbuf sb;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_sibling_cores = nr;
+	strbuf_init(&sb, 128);
+
+	for (i = 0; i < nr; i++) {
+		str = do_read_string(fd, ph);
+		if (!str)
+			goto error;
+
+		/* include a NULL character at the end */
+		strbuf_add(&sb, str, strlen(str) + 1);
+		free(str);
+	}
+	ph->env.sibling_cores = strbuf_detach(&sb, NULL);
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		return -1;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_sibling_threads = nr;
+
+	for (i = 0; i < nr; i++) {
+		str = do_read_string(fd, ph);
+		if (!str)
+			goto error;
+
+		/* include a NULL character at the end */
+		strbuf_add(&sb, str, strlen(str) + 1);
+		free(str);
+	}
+	ph->env.sibling_threads = strbuf_detach(&sb, NULL);
+	return 0;
+
+error:
+	strbuf_release(&sb);
+	return -1;
+}
+
+static int process_numa_topology(struct perf_file_section *section __maybe_unused,
+				 struct perf_header *ph, int feat __maybe_unused,
+				 int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	u32 nr, node, i;
+	char *str;
+	uint64_t mem_total, mem_free;
+	struct strbuf sb;
+
+	/* nr nodes */
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != sizeof(nr))
+		goto error;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	ph->env.nr_numa_nodes = nr;
+	strbuf_init(&sb, 256);
+
+	for (i = 0; i < nr; i++) {
+		/* node number */
+		ret = read(fd, &node, sizeof(node));
+		if (ret != sizeof(node))
+			goto error;
+
+		ret = read(fd, &mem_total, sizeof(u64));
+		if (ret != sizeof(u64))
+			goto error;
+
+		ret = read(fd, &mem_free, sizeof(u64));
+		if (ret != sizeof(u64))
+			goto error;
+
+		if (ph->needs_swap) {
+			node = bswap_32(node);
+			mem_total = bswap_64(mem_total);
+			mem_free = bswap_64(mem_free);
+		}
+
+		strbuf_addf(&sb, "%u:%"PRIu64":%"PRIu64":",
+			    node, mem_total, mem_free);
+
+		str = do_read_string(fd, ph);
+		if (!str)
+			goto error;
+
+		/* include a NULL character at the end */
+		strbuf_add(&sb, str, strlen(str) + 1);
+		free(str);
+	}
+	ph->env.numa_nodes = strbuf_detach(&sb, NULL);
+	return 0;
+
+error:
+	strbuf_release(&sb);
+	return -1;
+}
+
+static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
+				struct perf_header *ph, int feat __maybe_unused,
+				int fd, void *data __maybe_unused)
+{
+	size_t ret;
+	char *name;
+	u32 pmu_num;
+	u32 type;
+	struct strbuf sb;
+
+	ret = read(fd, &pmu_num, sizeof(pmu_num));
+	if (ret != sizeof(pmu_num))
+		return -1;
+
+	if (ph->needs_swap)
+		pmu_num = bswap_32(pmu_num);
+
+	if (!pmu_num) {
+		pr_debug("pmu mappings not available\n");
+		return 0;
+	}
+
+	ph->env.nr_pmu_mappings = pmu_num;
+	strbuf_init(&sb, 128);
+
+	while (pmu_num) {
+		if (read(fd, &type, sizeof(type)) != sizeof(type))
+			goto error;
+		if (ph->needs_swap)
+			type = bswap_32(type);
+
+		name = do_read_string(fd, ph);
+		if (!name)
+			goto error;
+
+		strbuf_addf(&sb, "%u:%s", type, name);
+		/* include a NULL character at the end */
+		strbuf_add(&sb, "", 1);
+
+		free(name);
+		pmu_num--;
+	}
+	ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
+	return 0;
+
+error:
+	strbuf_release(&sb);
+	return -1;
+}
+
 struct feature_ops {
 	int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
 	void (*print)(struct perf_header *h, int fd, FILE *fp);
@@ -1745,10 +2041,11 @@ struct feature_ops {
 		.process = process_##func }
 #define FEAT_OPF(n, func) \
 	[n] = { .name = #n, .write = write_##func, .print = print_##func, \
-		.full_only = true }
+		.process = process_##func, .full_only = true }
 #define FEAT_OPA_R(n, func) \
 	[n] = { .name = #n, .write = write_##func, .print = print_##func, \
-		.read  = read_##func }
+		.read  = read_##func, .process = process_##func, \
+		.full_only = true }
 
 /* feature_ops not implemented: */
 #define print_tracing_data	NULL
@@ -1757,20 +2054,20 @@ struct feature_ops {
 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
 	FEAT_OPP(HEADER_TRACING_DATA,	tracing_data),
 	FEAT_OPP(HEADER_BUILD_ID,	build_id),
-	FEAT_OPA(HEADER_HOSTNAME,	hostname),
-	FEAT_OPA(HEADER_OSRELEASE,	osrelease),
-	FEAT_OPA(HEADER_VERSION,	version),
-	FEAT_OPA(HEADER_ARCH,		arch),
-	FEAT_OPA(HEADER_NRCPUS,		nrcpus),
-	FEAT_OPA(HEADER_CPUDESC,	cpudesc),
+	FEAT_OPP(HEADER_HOSTNAME,	hostname),
+	FEAT_OPP(HEADER_OSRELEASE,	osrelease),
+	FEAT_OPP(HEADER_VERSION,	version),
+	FEAT_OPP(HEADER_ARCH,		arch),
+	FEAT_OPP(HEADER_NRCPUS,		nrcpus),
+	FEAT_OPP(HEADER_CPUDESC,	cpudesc),
 	FEAT_OPA_R(HEADER_CPUID,	cpuid),
-	FEAT_OPA(HEADER_TOTAL_MEM,	total_mem),
+	FEAT_OPP(HEADER_TOTAL_MEM,	total_mem),
 	FEAT_OPP(HEADER_EVENT_DESC,	event_desc),
-	FEAT_OPA(HEADER_CMDLINE,	cmdline),
+	FEAT_OPP(HEADER_CMDLINE,	cmdline),
 	FEAT_OPF(HEADER_CPU_TOPOLOGY,	cpu_topology),
 	FEAT_OPF(HEADER_NUMA_TOPOLOGY,	numa_topology),
 	FEAT_OPA(HEADER_BRANCH_STACK,	branch_stack),
-	FEAT_OPA(HEADER_PMU_MAPPINGS,	pmu_mappings),
+	FEAT_OPP(HEADER_PMU_MAPPINGS,	pmu_mappings),
 };
 
 struct header_print_data {

[PATCH 3/6] perf header: Use pre-processed session env when printing

[Namhyung Kim]

>From now on each feature information is processed and saved in perf
header so that it can be used for printing.  The event desc and branch
stack features are not touched since they're not saved.

Cc: Stephane Eranian <eranian@google.com>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/header.c | 207 +++++++++++++++--------------------------------
 1 file changed, 66 insertions(+), 141 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index d74b58d4105d..b2929d7a3d4e 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1103,118 +1103,80 @@ static int write_branch_stack(int fd __maybe_unused,
 	return 0;
 }
 
-static void print_hostname(struct perf_header *ph, int fd, FILE *fp)
+static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
+			   FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# hostname : %s\n", str);
-	free(str);
+	fprintf(fp, "# hostname : %s\n", ph->env.hostname);
 }
 
-static void print_osrelease(struct perf_header *ph, int fd, FILE *fp)
+static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
+			    FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# os release : %s\n", str);
-	free(str);
+	fprintf(fp, "# os release : %s\n", ph->env.os_release);
 }
 
-static void print_arch(struct perf_header *ph, int fd, FILE *fp)
+static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# arch : %s\n", str);
-	free(str);
+	fprintf(fp, "# arch : %s\n", ph->env.arch);
 }
 
-static void print_cpudesc(struct perf_header *ph, int fd, FILE *fp)
+static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
+			  FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# cpudesc : %s\n", str);
-	free(str);
+	fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
 }
 
-static void print_nrcpus(struct perf_header *ph, int fd, FILE *fp)
+static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
+			 FILE *fp)
 {
-	ssize_t ret;
-	u32 nr;
-
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		nr = -1; /* interpreted as error */
-
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
-
-	fprintf(fp, "# nrcpus online : %u\n", nr);
-
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		nr = -1; /* interpreted as error */
-
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
-
-	fprintf(fp, "# nrcpus avail : %u\n", nr);
+	fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
+	fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
 }
 
-static void print_version(struct perf_header *ph, int fd, FILE *fp)
+static void print_version(struct perf_header *ph, int fd __maybe_unused,
+			  FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# perf version : %s\n", str);
-	free(str);
+	fprintf(fp, "# perf version : %s\n", ph->env.version);
 }
 
-static void print_cmdline(struct perf_header *ph, int fd, FILE *fp)
+static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
+			  FILE *fp)
 {
-	ssize_t ret;
+	int nr, i;
 	char *str;
-	u32 nr, i;
-
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		return;
 
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
+	nr = ph->env.nr_cmdline;
+	str = ph->env.cmdline;
 
 	fprintf(fp, "# cmdline : ");
 
 	for (i = 0; i < nr; i++) {
-		str = do_read_string(fd, ph);
 		fprintf(fp, "%s ", str);
-		free(str);
+		str += strlen(str) + 1;
 	}
 	fputc('\n', fp);
 }
 
-static void print_cpu_topology(struct perf_header *ph, int fd, FILE *fp)
+static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
+			       FILE *fp)
 {
-	ssize_t ret;
-	u32 nr, i;
+	int nr, i;
 	char *str;
 
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		return;
-
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
+	nr = ph->env.nr_sibling_cores;
+	str = ph->env.sibling_cores;
 
 	for (i = 0; i < nr; i++) {
-		str = do_read_string(fd, ph);
 		fprintf(fp, "# sibling cores   : %s\n", str);
-		free(str);
+		str += strlen(str) + 1;
 	}
 
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		return;
-
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
+	nr = ph->env.nr_sibling_threads;
+	str = ph->env.sibling_threads;
 
 	for (i = 0; i < nr; i++) {
-		str = do_read_string(fd, ph);
 		fprintf(fp, "# sibling threads : %s\n", str);
-		free(str);
+		str += strlen(str) + 1;
 	}
 }
 
@@ -1375,126 +1337,89 @@ static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
 	free_event_desc(events);
 }
 
-static void print_total_mem(struct perf_header *h __maybe_unused, int fd,
+static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
 			    FILE *fp)
 {
-	uint64_t mem;
-	ssize_t ret;
-
-	ret = read(fd, &mem, sizeof(mem));
-	if (ret != sizeof(mem))
-		goto error;
-
-	if (h->needs_swap)
-		mem = bswap_64(mem);
-
-	fprintf(fp, "# total memory : %"PRIu64" kB\n", mem);
-	return;
-error:
-	fprintf(fp, "# total memory : unknown\n");
+	fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
 }
 
-static void print_numa_topology(struct perf_header *h __maybe_unused, int fd,
+static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
 				FILE *fp)
 {
-	ssize_t ret;
 	u32 nr, c, i;
-	char *str;
+	char *str, *tmp;
 	uint64_t mem_total, mem_free;
 
 	/* nr nodes */
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		goto error;
-
-	if (h->needs_swap)
-		nr = bswap_32(nr);
+	nr = ph->env.nr_numa_nodes;
+	str = ph->env.numa_nodes;
 
 	for (i = 0; i < nr; i++) {
-
 		/* node number */
-		ret = read(fd, &c, sizeof(c));
-		if (ret != (ssize_t)sizeof(c))
+		c = strtoul(str, &tmp, 0);
+		if (*tmp != ':')
 			goto error;
 
-		if (h->needs_swap)
-			c = bswap_32(c);
-
-		ret = read(fd, &mem_total, sizeof(u64));
-		if (ret != sizeof(u64))
+		str = tmp + 1;
+		mem_total = strtoull(str, &tmp, 0);
+		if (*tmp != ':')
 			goto error;
 
-		ret = read(fd, &mem_free, sizeof(u64));
-		if (ret != sizeof(u64))
+		str = tmp + 1;
+		mem_free = strtoull(str, &tmp, 0);
+		if (*tmp != ':')
 			goto error;
 
-		if (h->needs_swap) {
-			mem_total = bswap_64(mem_total);
-			mem_free = bswap_64(mem_free);
-		}
-
 		fprintf(fp, "# node%u meminfo  : total = %"PRIu64" kB,"
 			    " free = %"PRIu64" kB\n",
-			c,
-			mem_total,
-			mem_free);
+			c, mem_total, mem_free);
 
-		str = do_read_string(fd, h);
+		str = tmp + 1;
 		fprintf(fp, "# node%u cpu list : %s\n", c, str);
-		free(str);
 	}
 	return;
 error:
 	fprintf(fp, "# numa topology : not available\n");
 }
 
-static void print_cpuid(struct perf_header *ph, int fd, FILE *fp)
+static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# cpuid : %s\n", str);
-	free(str);
+	fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
 }
 
 static void print_branch_stack(struct perf_header *ph __maybe_unused,
-			       int fd __maybe_unused,
-			       FILE *fp)
+			       int fd __maybe_unused, FILE *fp)
 {
 	fprintf(fp, "# contains samples with branch stack\n");
 }
 
-static void print_pmu_mappings(struct perf_header *ph, int fd, FILE *fp)
+static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
+			       FILE *fp)
 {
 	const char *delimiter = "# pmu mappings: ";
-	char *name;
-	int ret;
+	char *str, *tmp;
 	u32 pmu_num;
 	u32 type;
 
-	ret = read(fd, &pmu_num, sizeof(pmu_num));
-	if (ret != sizeof(pmu_num))
-		goto error;
-
-	if (ph->needs_swap)
-		pmu_num = bswap_32(pmu_num);
-
+	pmu_num = ph->env.nr_pmu_mappings;
 	if (!pmu_num) {
 		fprintf(fp, "# pmu mappings: not available\n");
 		return;
 	}
 
+	str = ph->env.pmu_mappings;
+
 	while (pmu_num) {
-		if (read(fd, &type, sizeof(type)) != sizeof(type))
-			break;
-		if (ph->needs_swap)
-			type = bswap_32(type);
+		type = strtoul(str, &tmp, 0);
+		if (*tmp != ':')
+			goto error;
+
+		str = tmp + 1;
+		fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
 
-		name = do_read_string(fd, ph);
-		if (!name)
-			break;
-		pmu_num--;
-		fprintf(fp, "%s%s = %" PRIu32, delimiter, name, type);
-		free(name);
 		delimiter = ", ";
+		str += strlen(str) + 1;
+		pmu_num--;
 	}
 
 	fprintf(fp, "\n");
-- 
1.7.11.4

[tip:perf/core] perf header: Use pre-processed session env when printing

[tip-bot for Namhyung Kim]

Commit-ID:  7e94cfcc9d201984a7be00a4fb42050c69ec4c56
Gitweb:     http://git.kernel.org/tip/7e94cfcc9d201984a7be00a4fb42050c69ec4c56
Author:     Namhyung Kim <namhyung@kernel.org>
AuthorDate: Mon, 24 Sep 2012 17:15:00 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 24 Sep 2012 11:45:53 -0300

perf header: Use pre-processed session env when printing

>From now on each feature information is processed and saved in perf
header so that it can be used for printing.  The event desc and branch
stack features are not touched since they're not saved.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1348474503-15070-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/header.c |  207 +++++++++++++++-------------------------------
 1 files changed, 66 insertions(+), 141 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index d74b58d..b2929d7 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1103,118 +1103,80 @@ static int write_branch_stack(int fd __maybe_unused,
 	return 0;
 }
 
-static void print_hostname(struct perf_header *ph, int fd, FILE *fp)
+static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
+			   FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# hostname : %s\n", str);
-	free(str);
+	fprintf(fp, "# hostname : %s\n", ph->env.hostname);
 }
 
-static void print_osrelease(struct perf_header *ph, int fd, FILE *fp)
+static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
+			    FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# os release : %s\n", str);
-	free(str);
+	fprintf(fp, "# os release : %s\n", ph->env.os_release);
 }
 
-static void print_arch(struct perf_header *ph, int fd, FILE *fp)
+static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# arch : %s\n", str);
-	free(str);
+	fprintf(fp, "# arch : %s\n", ph->env.arch);
 }
 
-static void print_cpudesc(struct perf_header *ph, int fd, FILE *fp)
+static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
+			  FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# cpudesc : %s\n", str);
-	free(str);
+	fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
 }
 
-static void print_nrcpus(struct perf_header *ph, int fd, FILE *fp)
+static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
+			 FILE *fp)
 {
-	ssize_t ret;
-	u32 nr;
-
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		nr = -1; /* interpreted as error */
-
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
-
-	fprintf(fp, "# nrcpus online : %u\n", nr);
-
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		nr = -1; /* interpreted as error */
-
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
-
-	fprintf(fp, "# nrcpus avail : %u\n", nr);
+	fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
+	fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
 }
 
-static void print_version(struct perf_header *ph, int fd, FILE *fp)
+static void print_version(struct perf_header *ph, int fd __maybe_unused,
+			  FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# perf version : %s\n", str);
-	free(str);
+	fprintf(fp, "# perf version : %s\n", ph->env.version);
 }
 
-static void print_cmdline(struct perf_header *ph, int fd, FILE *fp)
+static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
+			  FILE *fp)
 {
-	ssize_t ret;
+	int nr, i;
 	char *str;
-	u32 nr, i;
-
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		return;
 
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
+	nr = ph->env.nr_cmdline;
+	str = ph->env.cmdline;
 
 	fprintf(fp, "# cmdline : ");
 
 	for (i = 0; i < nr; i++) {
-		str = do_read_string(fd, ph);
 		fprintf(fp, "%s ", str);
-		free(str);
+		str += strlen(str) + 1;
 	}
 	fputc('\n', fp);
 }
 
-static void print_cpu_topology(struct perf_header *ph, int fd, FILE *fp)
+static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
+			       FILE *fp)
 {
-	ssize_t ret;
-	u32 nr, i;
+	int nr, i;
 	char *str;
 
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		return;
-
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
+	nr = ph->env.nr_sibling_cores;
+	str = ph->env.sibling_cores;
 
 	for (i = 0; i < nr; i++) {
-		str = do_read_string(fd, ph);
 		fprintf(fp, "# sibling cores   : %s\n", str);
-		free(str);
+		str += strlen(str) + 1;
 	}
 
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		return;
-
-	if (ph->needs_swap)
-		nr = bswap_32(nr);
+	nr = ph->env.nr_sibling_threads;
+	str = ph->env.sibling_threads;
 
 	for (i = 0; i < nr; i++) {
-		str = do_read_string(fd, ph);
 		fprintf(fp, "# sibling threads : %s\n", str);
-		free(str);
+		str += strlen(str) + 1;
 	}
 }
 
@@ -1375,126 +1337,89 @@ static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
 	free_event_desc(events);
 }
 
-static void print_total_mem(struct perf_header *h __maybe_unused, int fd,
+static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
 			    FILE *fp)
 {
-	uint64_t mem;
-	ssize_t ret;
-
-	ret = read(fd, &mem, sizeof(mem));
-	if (ret != sizeof(mem))
-		goto error;
-
-	if (h->needs_swap)
-		mem = bswap_64(mem);
-
-	fprintf(fp, "# total memory : %"PRIu64" kB\n", mem);
-	return;
-error:
-	fprintf(fp, "# total memory : unknown\n");
+	fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
 }
 
-static void print_numa_topology(struct perf_header *h __maybe_unused, int fd,
+static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
 				FILE *fp)
 {
-	ssize_t ret;
 	u32 nr, c, i;
-	char *str;
+	char *str, *tmp;
 	uint64_t mem_total, mem_free;
 
 	/* nr nodes */
-	ret = read(fd, &nr, sizeof(nr));
-	if (ret != (ssize_t)sizeof(nr))
-		goto error;
-
-	if (h->needs_swap)
-		nr = bswap_32(nr);
+	nr = ph->env.nr_numa_nodes;
+	str = ph->env.numa_nodes;
 
 	for (i = 0; i < nr; i++) {
-
 		/* node number */
-		ret = read(fd, &c, sizeof(c));
-		if (ret != (ssize_t)sizeof(c))
+		c = strtoul(str, &tmp, 0);
+		if (*tmp != ':')
 			goto error;
 
-		if (h->needs_swap)
-			c = bswap_32(c);
-
-		ret = read(fd, &mem_total, sizeof(u64));
-		if (ret != sizeof(u64))
+		str = tmp + 1;
+		mem_total = strtoull(str, &tmp, 0);
+		if (*tmp != ':')
 			goto error;
 
-		ret = read(fd, &mem_free, sizeof(u64));
-		if (ret != sizeof(u64))
+		str = tmp + 1;
+		mem_free = strtoull(str, &tmp, 0);
+		if (*tmp != ':')
 			goto error;
 
-		if (h->needs_swap) {
-			mem_total = bswap_64(mem_total);
-			mem_free = bswap_64(mem_free);
-		}
-
 		fprintf(fp, "# node%u meminfo  : total = %"PRIu64" kB,"
 			    " free = %"PRIu64" kB\n",
-			c,
-			mem_total,
-			mem_free);
+			c, mem_total, mem_free);
 
-		str = do_read_string(fd, h);
+		str = tmp + 1;
 		fprintf(fp, "# node%u cpu list : %s\n", c, str);
-		free(str);
 	}
 	return;
 error:
 	fprintf(fp, "# numa topology : not available\n");
 }
 
-static void print_cpuid(struct perf_header *ph, int fd, FILE *fp)
+static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
 {
-	char *str = do_read_string(fd, ph);
-	fprintf(fp, "# cpuid : %s\n", str);
-	free(str);
+	fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
 }
 
 static void print_branch_stack(struct perf_header *ph __maybe_unused,
-			       int fd __maybe_unused,
-			       FILE *fp)
+			       int fd __maybe_unused, FILE *fp)
 {
 	fprintf(fp, "# contains samples with branch stack\n");
 }
 
-static void print_pmu_mappings(struct perf_header *ph, int fd, FILE *fp)
+static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
+			       FILE *fp)
 {
 	const char *delimiter = "# pmu mappings: ";
-	char *name;
-	int ret;
+	char *str, *tmp;
 	u32 pmu_num;
 	u32 type;
 
-	ret = read(fd, &pmu_num, sizeof(pmu_num));
-	if (ret != sizeof(pmu_num))
-		goto error;
-
-	if (ph->needs_swap)
-		pmu_num = bswap_32(pmu_num);
-
+	pmu_num = ph->env.nr_pmu_mappings;
 	if (!pmu_num) {
 		fprintf(fp, "# pmu mappings: not available\n");
 		return;
 	}
 
+	str = ph->env.pmu_mappings;
+
 	while (pmu_num) {
-		if (read(fd, &type, sizeof(type)) != sizeof(type))
-			break;
-		if (ph->needs_swap)
-			type = bswap_32(type);
+		type = strtoul(str, &tmp, 0);
+		if (*tmp != ':')
+			goto error;
+
+		str = tmp + 1;
+		fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
 
-		name = do_read_string(fd, ph);
-		if (!name)
-			break;
-		pmu_num--;
-		fprintf(fp, "%s%s = %" PRIu32, delimiter, name, type);
-		free(name);
 		delimiter = ", ";
+		str += strlen(str) + 1;
+		pmu_num--;
 	}
 
 	fprintf(fp, "\n");

[PATCH 4/6] perf header: Remove unused @feat arg from ->process callback

[Namhyung Kim]

From: Namhyung Kim <namhyung.kim@lge.com>

As the @feat arg is not used anywhere, get rid of it from the signature.

Cc: Stephane Eranian <eranian@google.com>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/header.c | 70 ++++++++++++++++++++++++------------------------
 1 file changed, 35 insertions(+), 35 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index b2929d7a3d4e..4b028df83a40 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1580,18 +1580,16 @@ out:
 	return err;
 }
 
-static int process_tracing_data(struct perf_file_section *section
-				__maybe_unused,
-			      struct perf_header *ph __maybe_unused,
-			      int feat __maybe_unused, int fd, void *data)
+static int process_tracing_data(struct perf_file_section *section __maybe_unused,
+				struct perf_header *ph __maybe_unused,
+				int fd, void *data)
 {
 	trace_report(fd, data, false);
 	return 0;
 }
 
 static int process_build_id(struct perf_file_section *section,
-			    struct perf_header *ph,
-			    int feat __maybe_unused, int fd,
+			    struct perf_header *ph, int fd,
 			    void *data __maybe_unused)
 {
 	if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
@@ -1600,40 +1598,40 @@ static int process_build_id(struct perf_file_section *section,
 }
 
 static int process_hostname(struct perf_file_section *section __maybe_unused,
-			    struct perf_header *ph, int feat __maybe_unused,
-			    int fd, void *data __maybe_unused)
+			    struct perf_header *ph, int fd,
+			    void *data __maybe_unused)
 {
 	ph->env.hostname = do_read_string(fd, ph);
 	return ph->env.hostname ? 0 : -ENOMEM;
 }
 
 static int process_osrelease(struct perf_file_section *section __maybe_unused,
-			     struct perf_header *ph, int feat __maybe_unused,
-			     int fd, void *data __maybe_unused)
+			     struct perf_header *ph, int fd,
+			     void *data __maybe_unused)
 {
 	ph->env.os_release = do_read_string(fd, ph);
 	return ph->env.os_release ? 0 : -ENOMEM;
 }
 
 static int process_version(struct perf_file_section *section __maybe_unused,
-			   struct perf_header *ph, int feat __maybe_unused,
-			   int fd, void *data __maybe_unused)
+			   struct perf_header *ph, int fd,
+			   void *data __maybe_unused)
 {
 	ph->env.version = do_read_string(fd, ph);
 	return ph->env.version ? 0 : -ENOMEM;
 }
 
 static int process_arch(struct perf_file_section *section __maybe_unused,
-			struct perf_header *ph, int feat __maybe_unused,
-			int fd, void *data __maybe_unused)
+			struct perf_header *ph,	int fd,
+			void *data __maybe_unused)
 {
 	ph->env.arch = do_read_string(fd, ph);
 	return ph->env.arch ? 0 : -ENOMEM;
 }
 
 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
-			  struct perf_header *ph, int feat __maybe_unused,
-			  int fd, void *data __maybe_unused)
+			  struct perf_header *ph, int fd,
+			  void *data __maybe_unused)
 {
 	size_t ret;
 	u32 nr;
@@ -1659,24 +1657,24 @@ static int process_nrcpus(struct perf_file_section *section __maybe_unused,
 }
 
 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
-			   struct perf_header *ph, int feat __maybe_unused,
-			   int fd, void *data __maybe_unused)
+			   struct perf_header *ph, int fd,
+			   void *data __maybe_unused)
 {
 	ph->env.cpu_desc = do_read_string(fd, ph);
 	return ph->env.cpu_desc ? 0 : -ENOMEM;
 }
 
 static int process_cpuid(struct perf_file_section *section __maybe_unused,
-			 struct perf_header *ph, int feat __maybe_unused,
-			 int fd, void *data __maybe_unused)
+			 struct perf_header *ph,  int fd,
+			 void *data __maybe_unused)
 {
 	ph->env.cpuid = do_read_string(fd, ph);
 	return ph->env.cpuid ? 0 : -ENOMEM;
 }
 
 static int process_total_mem(struct perf_file_section *section __maybe_unused,
-			     struct perf_header *ph, int feat __maybe_unused,
-			     int fd, void *data __maybe_unused)
+			     struct perf_header *ph, int fd,
+			     void *data __maybe_unused)
 {
 	uint64_t mem;
 	size_t ret;
@@ -1711,7 +1709,8 @@ perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
 }
 
 static void
-perf_evlist__set_event_name(struct perf_evlist *evlist, struct perf_evsel *event)
+perf_evlist__set_event_name(struct perf_evlist *evlist,
+			    struct perf_evsel *event)
 {
 	struct perf_evsel *evsel;
 
@@ -1730,15 +1729,16 @@ perf_evlist__set_event_name(struct perf_evlist *evlist, struct perf_evsel *event
 
 static int
 process_event_desc(struct perf_file_section *section __maybe_unused,
-		   struct perf_header *header, int feat __maybe_unused, int fd,
+		   struct perf_header *header, int fd,
 		   void *data __maybe_unused)
 {
-	struct perf_session *session = container_of(header, struct perf_session, header);
+	struct perf_session *session;
 	struct perf_evsel *evsel, *events = read_event_desc(header, fd);
 
 	if (!events)
 		return 0;
 
+	session = container_of(header, struct perf_session, header);
 	for (evsel = events; evsel->attr.size; evsel++)
 		perf_evlist__set_event_name(session->evlist, evsel);
 
@@ -1748,8 +1748,8 @@ process_event_desc(struct perf_file_section *section __maybe_unused,
 }
 
 static int process_cmdline(struct perf_file_section *section __maybe_unused,
-			   struct perf_header *ph, int feat __maybe_unused,
-			   int fd, void *data __maybe_unused)
+			   struct perf_header *ph, int fd,
+			   void *data __maybe_unused)
 {
 	size_t ret;
 	char *str;
@@ -1784,8 +1784,8 @@ error:
 }
 
 static int process_cpu_topology(struct perf_file_section *section __maybe_unused,
-				struct perf_header *ph, int feat __maybe_unused,
-				int fd, void *data __maybe_unused)
+				struct perf_header *ph, int fd,
+				void *data __maybe_unused)
 {
 	size_t ret;
 	u32 nr, i;
@@ -1840,8 +1840,8 @@ error:
 }
 
 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
-				 struct perf_header *ph, int feat __maybe_unused,
-				 int fd, void *data __maybe_unused)
+				 struct perf_header *ph, int fd,
+				 void *data __maybe_unused)
 {
 	size_t ret;
 	u32 nr, node, i;
@@ -1900,8 +1900,8 @@ error:
 }
 
 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
-				struct perf_header *ph, int feat __maybe_unused,
-				int fd, void *data __maybe_unused)
+				struct perf_header *ph, int fd,
+				void *data __maybe_unused)
 {
 	size_t ret;
 	char *name;
@@ -1954,7 +1954,7 @@ struct feature_ops {
 	void (*print)(struct perf_header *h, int fd, FILE *fp);
 	char *(*read)(struct perf_header *h, int fd);
 	int (*process)(struct perf_file_section *section,
-		       struct perf_header *h, int feat, int fd, void *data);
+		       struct perf_header *h, int fd, void *data);
 	const char *name;
 	bool full_only;
 };
@@ -2520,7 +2520,7 @@ static int perf_file_section__process(struct perf_file_section *section,
 	if (!feat_ops[feat].process)
 		return 0;
 
-	return feat_ops[feat].process(section, ph, feat, fd, data);
+	return feat_ops[feat].process(section, ph, fd, data);
 }
 
 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
-- 
1.7.11.4

[tip:perf/core] perf header: Remove unused @feat arg from -> process callback

[tip-bot for Namhyung Kim]

Commit-ID:  3d7eb86b9d84e7493c8c835fbcd2a3fe4a1f5937
Gitweb:     http://git.kernel.org/tip/3d7eb86b9d84e7493c8c835fbcd2a3fe4a1f5937
Author:     Namhyung Kim <namhyung.kim@lge.com>
AuthorDate: Mon, 24 Sep 2012 17:15:01 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 24 Sep 2012 11:47:09 -0300

perf header: Remove unused @feat arg from ->process callback

As the @feat arg is not used anywhere, get rid of it from the signature.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1348474503-15070-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/header.c |   70 +++++++++++++++++++++++-----------------------
 1 files changed, 35 insertions(+), 35 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index b2929d7..4b028df 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1580,18 +1580,16 @@ out:
 	return err;
 }
 
-static int process_tracing_data(struct perf_file_section *section
-				__maybe_unused,
-			      struct perf_header *ph __maybe_unused,
-			      int feat __maybe_unused, int fd, void *data)
+static int process_tracing_data(struct perf_file_section *section __maybe_unused,
+				struct perf_header *ph __maybe_unused,
+				int fd, void *data)
 {
 	trace_report(fd, data, false);
 	return 0;
 }
 
 static int process_build_id(struct perf_file_section *section,
-			    struct perf_header *ph,
-			    int feat __maybe_unused, int fd,
+			    struct perf_header *ph, int fd,
 			    void *data __maybe_unused)
 {
 	if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
@@ -1600,40 +1598,40 @@ static int process_build_id(struct perf_file_section *section,
 }
 
 static int process_hostname(struct perf_file_section *section __maybe_unused,
-			    struct perf_header *ph, int feat __maybe_unused,
-			    int fd, void *data __maybe_unused)
+			    struct perf_header *ph, int fd,
+			    void *data __maybe_unused)
 {
 	ph->env.hostname = do_read_string(fd, ph);
 	return ph->env.hostname ? 0 : -ENOMEM;
 }
 
 static int process_osrelease(struct perf_file_section *section __maybe_unused,
-			     struct perf_header *ph, int feat __maybe_unused,
-			     int fd, void *data __maybe_unused)
+			     struct perf_header *ph, int fd,
+			     void *data __maybe_unused)
 {
 	ph->env.os_release = do_read_string(fd, ph);
 	return ph->env.os_release ? 0 : -ENOMEM;
 }
 
 static int process_version(struct perf_file_section *section __maybe_unused,
-			   struct perf_header *ph, int feat __maybe_unused,
-			   int fd, void *data __maybe_unused)
+			   struct perf_header *ph, int fd,
+			   void *data __maybe_unused)
 {
 	ph->env.version = do_read_string(fd, ph);
 	return ph->env.version ? 0 : -ENOMEM;
 }
 
 static int process_arch(struct perf_file_section *section __maybe_unused,
-			struct perf_header *ph, int feat __maybe_unused,
-			int fd, void *data __maybe_unused)
+			struct perf_header *ph,	int fd,
+			void *data __maybe_unused)
 {
 	ph->env.arch = do_read_string(fd, ph);
 	return ph->env.arch ? 0 : -ENOMEM;
 }
 
 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
-			  struct perf_header *ph, int feat __maybe_unused,
-			  int fd, void *data __maybe_unused)
+			  struct perf_header *ph, int fd,
+			  void *data __maybe_unused)
 {
 	size_t ret;
 	u32 nr;
@@ -1659,24 +1657,24 @@ static int process_nrcpus(struct perf_file_section *section __maybe_unused,
 }
 
 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
-			   struct perf_header *ph, int feat __maybe_unused,
-			   int fd, void *data __maybe_unused)
+			   struct perf_header *ph, int fd,
+			   void *data __maybe_unused)
 {
 	ph->env.cpu_desc = do_read_string(fd, ph);
 	return ph->env.cpu_desc ? 0 : -ENOMEM;
 }
 
 static int process_cpuid(struct perf_file_section *section __maybe_unused,
-			 struct perf_header *ph, int feat __maybe_unused,
-			 int fd, void *data __maybe_unused)
+			 struct perf_header *ph,  int fd,
+			 void *data __maybe_unused)
 {
 	ph->env.cpuid = do_read_string(fd, ph);
 	return ph->env.cpuid ? 0 : -ENOMEM;
 }
 
 static int process_total_mem(struct perf_file_section *section __maybe_unused,
-			     struct perf_header *ph, int feat __maybe_unused,
-			     int fd, void *data __maybe_unused)
+			     struct perf_header *ph, int fd,
+			     void *data __maybe_unused)
 {
 	uint64_t mem;
 	size_t ret;
@@ -1711,7 +1709,8 @@ perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
 }
 
 static void
-perf_evlist__set_event_name(struct perf_evlist *evlist, struct perf_evsel *event)
+perf_evlist__set_event_name(struct perf_evlist *evlist,
+			    struct perf_evsel *event)
 {
 	struct perf_evsel *evsel;
 
@@ -1730,15 +1729,16 @@ perf_evlist__set_event_name(struct perf_evlist *evlist, struct perf_evsel *event
 
 static int
 process_event_desc(struct perf_file_section *section __maybe_unused,
-		   struct perf_header *header, int feat __maybe_unused, int fd,
+		   struct perf_header *header, int fd,
 		   void *data __maybe_unused)
 {
-	struct perf_session *session = container_of(header, struct perf_session, header);
+	struct perf_session *session;
 	struct perf_evsel *evsel, *events = read_event_desc(header, fd);
 
 	if (!events)
 		return 0;
 
+	session = container_of(header, struct perf_session, header);
 	for (evsel = events; evsel->attr.size; evsel++)
 		perf_evlist__set_event_name(session->evlist, evsel);
 
@@ -1748,8 +1748,8 @@ process_event_desc(struct perf_file_section *section __maybe_unused,
 }
 
 static int process_cmdline(struct perf_file_section *section __maybe_unused,
-			   struct perf_header *ph, int feat __maybe_unused,
-			   int fd, void *data __maybe_unused)
+			   struct perf_header *ph, int fd,
+			   void *data __maybe_unused)
 {
 	size_t ret;
 	char *str;
@@ -1784,8 +1784,8 @@ error:
 }
 
 static int process_cpu_topology(struct perf_file_section *section __maybe_unused,
-				struct perf_header *ph, int feat __maybe_unused,
-				int fd, void *data __maybe_unused)
+				struct perf_header *ph, int fd,
+				void *data __maybe_unused)
 {
 	size_t ret;
 	u32 nr, i;
@@ -1840,8 +1840,8 @@ error:
 }
 
 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
-				 struct perf_header *ph, int feat __maybe_unused,
-				 int fd, void *data __maybe_unused)
+				 struct perf_header *ph, int fd,
+				 void *data __maybe_unused)
 {
 	size_t ret;
 	u32 nr, node, i;
@@ -1900,8 +1900,8 @@ error:
 }
 
 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
-				struct perf_header *ph, int feat __maybe_unused,
-				int fd, void *data __maybe_unused)
+				struct perf_header *ph, int fd,
+				void *data __maybe_unused)
 {
 	size_t ret;
 	char *name;
@@ -1954,7 +1954,7 @@ struct feature_ops {
 	void (*print)(struct perf_header *h, int fd, FILE *fp);
 	char *(*read)(struct perf_header *h, int fd);
 	int (*process)(struct perf_file_section *section,
-		       struct perf_header *h, int feat, int fd, void *data);
+		       struct perf_header *h, int fd, void *data);
 	const char *name;
 	bool full_only;
 };
@@ -2520,7 +2520,7 @@ static int perf_file_section__process(struct perf_file_section *section,
 	if (!feat_ops[feat].process)
 		return 0;
 
-	return feat_ops[feat].process(section, ph, feat, fd, data);
+	return feat_ops[feat].process(section, ph, fd, data);
 }
 
 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,

[PATCH 5/6] perf kvm: Use perf_session_env for reading cpuid

[Namhyung Kim]

From: Namhyung Kim <namhyung.kim@lge.com>

We have processed and saved cpuid information to perf_session_env
so reuse it for get_cpu_isa().

Cc: David Ahern <dsahern@gmail.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Dong Hao <haodong@linux.vnet.ibm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/builtin-kvm.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 819af25a9a11..b76b3aa14ffd 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -664,16 +664,9 @@ static struct perf_tool eops = {
 
 static int get_cpu_isa(struct perf_session *session)
 {
-	char *cpuid;
+	char *cpuid = session->header.env.cpuid;
 	int isa;
 
-	cpuid = perf_header__read_feature(session, HEADER_CPUID);
-
-	if (!cpuid) {
-		pr_err("read HEADER_CPUID failed.\n");
-		return -ENOTSUP;
-	}
-
 	if (strstr(cpuid, "Intel"))
 		isa = 1;
 	else if (strstr(cpuid, "AMD"))
@@ -683,7 +676,6 @@ static int get_cpu_isa(struct perf_session *session)
 		isa = -ENOTSUP;
 	}
 
-	free(cpuid);
 	return isa;
 }
 
-- 
1.7.11.4

[tip:perf/core] perf kvm: Use perf_session_env for reading cpuid

[tip-bot for Namhyung Kim]

Commit-ID:  2f9e97aa8b4c6220c0770a966fb99d7366679813
Gitweb:     http://git.kernel.org/tip/2f9e97aa8b4c6220c0770a966fb99d7366679813
Author:     Namhyung Kim <namhyung.kim@lge.com>
AuthorDate: Mon, 24 Sep 2012 17:15:02 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 24 Sep 2012 11:47:27 -0300

perf kvm: Use perf_session_env for reading cpuid

We have processed and saved cpuid information to perf_session_env so
reuse it for get_cpu_isa().

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Dong Hao <haodong@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1348474503-15070-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-kvm.c |   10 +---------
 1 files changed, 1 insertions(+), 9 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 3eb53e3..a28c9ca 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -664,16 +664,9 @@ static struct perf_tool eops = {
 
 static int get_cpu_isa(struct perf_session *session)
 {
-	char *cpuid;
+	char *cpuid = session->header.env.cpuid;
 	int isa;
 
-	cpuid = perf_header__read_feature(session, HEADER_CPUID);
-
-	if (!cpuid) {
-		pr_err("read HEADER_CPUID failed.\n");
-		return -ENOTSUP;
-	}
-
 	if (strstr(cpuid, "Intel"))
 		isa = 1;
 	else if (strstr(cpuid, "AMD"))
@@ -683,7 +676,6 @@ static int get_cpu_isa(struct perf_session *session)
 		isa = -ENOTSUP;
 	}
 
-	free(cpuid);
 	return isa;
 }
 

[PATCH 6/6] perf header: Remove perf_header__read_feature

[Namhyung Kim]

From: Namhyung Kim <namhyung.kim@lge.com>

Because its only user builtin-kvm::get_cpu_isa() has gone, It can be
removed safely.  In general, we have the feature information in
perf_session_env already, no need to read it again.

Cc: David Ahern <dsahern@gmail.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Dong Hao <haodong@linux.vnet.ibm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/header.c | 60 +-----------------------------------------------
 tools/perf/util/header.h |  1 -
 2 files changed, 1 insertion(+), 60 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 4b028df83a40..6aae3290358e 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1690,11 +1690,6 @@ static int process_total_mem(struct perf_file_section *section __maybe_unused,
 	return 0;
 }
 
-static char *read_cpuid(struct perf_header *ph, int fd)
-{
-	return do_read_string(fd, ph);
-}
-
 static struct perf_evsel *
 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
 {
@@ -1952,7 +1947,6 @@ error:
 struct feature_ops {
 	int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
 	void (*print)(struct perf_header *h, int fd, FILE *fp);
-	char *(*read)(struct perf_header *h, int fd);
 	int (*process)(struct perf_file_section *section,
 		       struct perf_header *h, int fd, void *data);
 	const char *name;
@@ -1967,10 +1961,6 @@ struct feature_ops {
 #define FEAT_OPF(n, func) \
 	[n] = { .name = #n, .write = write_##func, .print = print_##func, \
 		.process = process_##func, .full_only = true }
-#define FEAT_OPA_R(n, func) \
-	[n] = { .name = #n, .write = write_##func, .print = print_##func, \
-		.read  = read_##func, .process = process_##func, \
-		.full_only = true }
 
 /* feature_ops not implemented: */
 #define print_tracing_data	NULL
@@ -1985,7 +1975,7 @@ static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
 	FEAT_OPP(HEADER_ARCH,		arch),
 	FEAT_OPP(HEADER_NRCPUS,		nrcpus),
 	FEAT_OPP(HEADER_CPUDESC,	cpudesc),
-	FEAT_OPA_R(HEADER_CPUID,	cpuid),
+	FEAT_OPP(HEADER_CPUID,		cpuid),
 	FEAT_OPP(HEADER_TOTAL_MEM,	total_mem),
 	FEAT_OPP(HEADER_EVENT_DESC,	event_desc),
 	FEAT_OPP(HEADER_CMDLINE,	cmdline),
@@ -2040,54 +2030,6 @@ int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
 	return 0;
 }
 
-struct header_read_data {
-	int feat;
-	char *result;
-};
-
-static int perf_file_section__read_feature(struct perf_file_section *section,
-				struct perf_header *ph,
-				int feat, int fd, void *data)
-{
-	struct header_read_data *hd = data;
-
-	if (feat != hd->feat)
-		return 0;
-
-	if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
-		pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
-				"%d, continuing...\n", section->offset, feat);
-	return 0;
-	}
-
-	if (feat >= HEADER_LAST_FEATURE) {
-		pr_warning("unknown feature %d\n", feat);
-		return 0;
-	}
-
-	if (!feat_ops[feat].read) {
-		pr_warning("read is not supported for feature %d\n", feat);
-		return 0;
-	}
-
-	hd->result = feat_ops[feat].read(ph, fd);
-	return 0;
-}
-
-char *perf_header__read_feature(struct perf_session *session, int feat)
-{
-	struct perf_header *header = &session->header;
-	struct header_read_data hd;
-	int fd = session->fd;
-
-	hd.feat = feat;
-	hd.result = NULL;
-
-	perf_header__process_sections(header, fd, &hd,
-				perf_file_section__read_feature);
-	return hd.result;
-}
-
 static int do_write_feat(int fd, struct perf_header *h, int type,
 			 struct perf_file_section **p,
 			 struct perf_evlist *evlist)
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 5867c7d74f97..99bdd3abce59 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -118,7 +118,6 @@ int perf_header__process_sections(struct perf_header *header, int fd,
 				  int feat, int fd, void *data));
 
 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
-char *perf_header__read_feature(struct perf_session *session, int feat);
 
 int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
 			  const char *name, bool is_kallsyms, bool is_vdso);
-- 
1.7.11.4

[tip:perf/core] perf header: Remove perf_header__read_feature

[tip-bot for Namhyung Kim]

Commit-ID:  37e9d750e672d6fa8c25463bd76240410bbbc786
Gitweb:     http://git.kernel.org/tip/37e9d750e672d6fa8c25463bd76240410bbbc786
Author:     Namhyung Kim <namhyung.kim@lge.com>
AuthorDate: Mon, 24 Sep 2012 17:15:03 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 24 Sep 2012 11:47:46 -0300

perf header: Remove perf_header__read_feature

Because its only user builtin-kvm::get_cpu_isa() has gone, It can be
removed safely.  In general, we have the feature information in
perf_session_env already, no need to read it again.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Dong Hao <haodong@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1348474503-15070-7-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/header.c |   60 +---------------------------------------------
 tools/perf/util/header.h |    1 -
 2 files changed, 1 insertions(+), 60 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 4b028df..6aae329 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1690,11 +1690,6 @@ static int process_total_mem(struct perf_file_section *section __maybe_unused,
 	return 0;
 }
 
-static char *read_cpuid(struct perf_header *ph, int fd)
-{
-	return do_read_string(fd, ph);
-}
-
 static struct perf_evsel *
 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
 {
@@ -1952,7 +1947,6 @@ error:
 struct feature_ops {
 	int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
 	void (*print)(struct perf_header *h, int fd, FILE *fp);
-	char *(*read)(struct perf_header *h, int fd);
 	int (*process)(struct perf_file_section *section,
 		       struct perf_header *h, int fd, void *data);
 	const char *name;
@@ -1967,10 +1961,6 @@ struct feature_ops {
 #define FEAT_OPF(n, func) \
 	[n] = { .name = #n, .write = write_##func, .print = print_##func, \
 		.process = process_##func, .full_only = true }
-#define FEAT_OPA_R(n, func) \
-	[n] = { .name = #n, .write = write_##func, .print = print_##func, \
-		.read  = read_##func, .process = process_##func, \
-		.full_only = true }
 
 /* feature_ops not implemented: */
 #define print_tracing_data	NULL
@@ -1985,7 +1975,7 @@ static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
 	FEAT_OPP(HEADER_ARCH,		arch),
 	FEAT_OPP(HEADER_NRCPUS,		nrcpus),
 	FEAT_OPP(HEADER_CPUDESC,	cpudesc),
-	FEAT_OPA_R(HEADER_CPUID,	cpuid),
+	FEAT_OPP(HEADER_CPUID,		cpuid),
 	FEAT_OPP(HEADER_TOTAL_MEM,	total_mem),
 	FEAT_OPP(HEADER_EVENT_DESC,	event_desc),
 	FEAT_OPP(HEADER_CMDLINE,	cmdline),
@@ -2040,54 +2030,6 @@ int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
 	return 0;
 }
 
-struct header_read_data {
-	int feat;
-	char *result;
-};
-
-static int perf_file_section__read_feature(struct perf_file_section *section,
-				struct perf_header *ph,
-				int feat, int fd, void *data)
-{
-	struct header_read_data *hd = data;
-
-	if (feat != hd->feat)
-		return 0;
-
-	if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
-		pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
-				"%d, continuing...\n", section->offset, feat);
-	return 0;
-	}
-
-	if (feat >= HEADER_LAST_FEATURE) {
-		pr_warning("unknown feature %d\n", feat);
-		return 0;
-	}
-
-	if (!feat_ops[feat].read) {
-		pr_warning("read is not supported for feature %d\n", feat);
-		return 0;
-	}
-
-	hd->result = feat_ops[feat].read(ph, fd);
-	return 0;
-}
-
-char *perf_header__read_feature(struct perf_session *session, int feat)
-{
-	struct perf_header *header = &session->header;
-	struct header_read_data hd;
-	int fd = session->fd;
-
-	hd.feat = feat;
-	hd.result = NULL;
-
-	perf_header__process_sections(header, fd, &hd,
-				perf_file_section__read_feature);
-	return hd.result;
-}
-
 static int do_write_feat(int fd, struct perf_header *h, int type,
 			 struct perf_file_section **p,
 			 struct perf_evlist *evlist)
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 5867c7d..99bdd3a 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -118,7 +118,6 @@ int perf_header__process_sections(struct perf_header *header, int fd,
 				  int feat, int fd, void *data));
 
 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
-char *perf_header__read_feature(struct perf_session *session, int feat);
 
 int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
 			  const char *name, bool is_kallsyms, bool is_vdso);