[PATCH 19/36] perf pmu: Pass pmu as a parameter to get_cpuid_str()

Arnaldo Carvalho de Melo
2017-12-06T14:42:48Z

From: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>

The cpuid string will not be same on all CPUs on heterogeneous platforms
like ARM's big.LITTLE, adding provision(using pmu->cpus) to find cpuid
string from associated CPUs of PMU CORE device.

Also optimise arguments to function pmu_add_cpu_aliases.

Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Jayachandran C <jnair@caviumnetworks.com>
Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@cavium.com>
Cc: Shaokun Zhang <zhangshaokun@hisilicon.com>
Link: http://lkml.kernel.org/r/20171016183222.25750-2-ganapatrao.kulkarni@cavium.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/powerpc/util/header.c | 2 +-
tools/perf/arch/x86/util/header.c | 2 +-
tools/perf/util/header.h | 3 ++-
tools/perf/util/metricgroup.c | 4 ++--
tools/perf/util/pmu.c | 22 +++++++++++-----------
tools/perf/util/pmu.h | 2 +-
6 files changed, 18 insertions(+), 17 deletions(-)

diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c
index 7a4cf80c207a..0b242664f5ea 100644
--- a/tools/perf/arch/powerpc/util/header.c
+++ b/tools/perf/arch/powerpc/util/header.c
@@ -35,7 +35,7 @@ get_cpuid(char *buffer, size_t sz)
}

char *
-get_cpuid_str(void)
+get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
{
char *bufp;

diff --git a/tools/perf/arch/x86/util/header.c b/tools/perf/arch/x86/util/header.c
index 33027c5e6f92..b626d2bad9f1 100644
--- a/tools/perf/arch/x86/util/header.c
+++ b/tools/perf/arch/x86/util/header.c
@@ -66,7 +66,7 @@ get_cpuid(char *buffer, size_t sz)
}

char *
-get_cpuid_str(void)
+get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
{
char *buf = malloc(128);

diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 91befc3b550d..317fb901e47f 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -9,6 +9,7 @@
#include <linux/types.h>
#include "event.h"
#include "env.h"
+#include "pmu.h"

enum {
HEADER_RESERVED = 0, /* always cleared */
@@ -171,5 +172,5 @@ int write_padded(struct feat_fd *fd, const void *bf,
*/
int get_cpuid(char *buffer, size_t sz);

-char *get_cpuid_str(void);
+char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused);
#endif /* __PERF_HEADER_H */
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 6fd709017bbc..e48410c99b39 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -274,7 +274,7 @@ static void metricgroup__print_strlist(struct strlist *metrics, bool raw)
void metricgroup__print(bool metrics, bool metricgroups, char *filter,
bool raw)
{
- struct pmu_events_map *map = perf_pmu__find_map();
+ struct pmu_events_map *map = perf_pmu__find_map(NULL);
struct pmu_event *pe;
int i;
struct rblist groups;
@@ -372,7 +372,7 @@ void metricgroup__print(bool metrics, bool metricgroups, char *filter,
static int metricgroup__add_metric(const char *metric, struct strbuf *events,
struct list_head *group_list)
{
- struct pmu_events_map *map = perf_pmu__find_map();
+ struct pmu_events_map *map = perf_pmu__find_map(NULL);
struct pmu_event *pe;
int ret = -EINVAL;
int i, j;
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 80fb1593913a..4e7dd3a0f123 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -542,12 +542,12 @@ static bool pmu_is_uncore(const char *name)
* Each architecture should provide a more precise id string that
* can be use to match the architecture's "mapfile".
*/
-char * __weak get_cpuid_str(void)
+char * __weak get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
{
return NULL;
}

-static char *perf_pmu__getcpuid(void)
+static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
{
char *cpuid;
static bool printed;
@@ -556,7 +556,7 @@ static char *perf_pmu__getcpuid(void)
if (cpuid)
cpuid = strdup(cpuid);
if (!cpuid)
- cpuid = get_cpuid_str();
+ cpuid = get_cpuid_str(pmu);
if (!cpuid)
return NULL;

@@ -567,10 +567,10 @@ static char *perf_pmu__getcpuid(void)
return cpuid;
}

-struct pmu_events_map *perf_pmu__find_map(void)
+struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu)
{
struct pmu_events_map *map;
- char *cpuid = perf_pmu__getcpuid();
+ char *cpuid = perf_pmu__getcpuid(pmu);
int i;

i = 0;
@@ -593,13 +593,14 @@ struct pmu_events_map *perf_pmu__find_map(void)
* to the current running CPU. Then, add all PMU events from that table
* as aliases.
*/
-static void pmu_add_cpu_aliases(struct list_head *head, const char *name)
+static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
{
int i;
struct pmu_events_map *map;
struct pmu_event *pe;
+ const char *name = pmu->name;

- map = perf_pmu__find_map();
+ map = perf_pmu__find_map(pmu);
if (!map)
return;

@@ -661,21 +662,20 @@ static struct perf_pmu *pmu_lookup(const char *name)
if (pmu_aliases(name, &aliases))
return NULL;

- pmu_add_cpu_aliases(&aliases, name);
pmu = zalloc(sizeof(*pmu));
if (!pmu)
return NULL;

pmu->cpus = pmu_cpumask(name);
-
+ pmu->name = strdup(name);
+ pmu->type = type;
pmu->is_uncore = pmu_is_uncore(name);
+ pmu_add_cpu_aliases(&aliases, pmu);

INIT_LIST_HEAD(&pmu->format);
INIT_LIST_HEAD(&pmu->aliases);
list_splice(&format, &pmu->format);
list_splice(&aliases, &pmu->aliases);
- pmu->name = strdup(name);
- pmu->type = type;
list_add_tail(&pmu->list, &pmus);

pmu->default_config = perf_pmu__get_default_config(pmu);
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 27c75e635866..76fecec7b3f9 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -92,6 +92,6 @@ int perf_pmu__test(void);

struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu);

-struct pmu_events_map *perf_pmu__find_map(void);
+struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu);

#endif /* __PMU_H */
--
2.13.6