[PATCH 45/66] libperf: Add perf_evlist__id_add_fd() function

Arnaldo Carvalho de Melo
2019-09-26T00:35:46Z

Add the perf_evlist__id_add_fd() function to libperf as an internal
function.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-32-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 44 ++++++++++++++++++++++++
tools/perf/lib/include/internal/evlist.h | 4 +++
tools/perf/util/evlist.c | 43 +----------------------
tools/perf/util/evlist.h | 4 ---
tools/perf/util/evsel.c | 2 +-
5 files changed, 50 insertions(+), 47 deletions(-)

diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index a29ee8a746d9..3a16dd0c044f 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -4,11 +4,14 @@
#include <linux/bitops.h>
#include <linux/list.h>
#include <linux/hash.h>
+#include <sys/ioctl.h>
#include <internal/evlist.h>
#include <internal/evsel.h>
#include <internal/xyarray.h>
#include <linux/zalloc.h>
#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
#include <perf/cpumap.h>
#include <perf/threadmap.h>

@@ -194,3 +197,44 @@ void perf_evlist__id_add(struct perf_evlist *evlist,
perf_evlist__id_hash(evlist, evsel, cpu, thread, id);
evsel->id[evsel->ids++] = id;
}
+
+int perf_evlist__id_add_fd(struct perf_evlist *evlist,
+ struct perf_evsel *evsel,
+ int cpu, int thread, int fd)
+{
+ u64 read_data[4] = { 0, };
+ int id_idx = 1; /* The first entry is the counter value */
+ u64 id;
+ int ret;
+
+ ret = ioctl(fd, PERF_EVENT_IOC_ID, &id);
+ if (!ret)
+ goto add;
+
+ if (errno != ENOTTY)
+ return -1;
+
+ /* Legacy way to get event id.. All hail to old kernels! */
+
+ /*
+ * This way does not work with group format read, so bail
+ * out in that case.
+ */
+ if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP)
+ return -1;
+
+ if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
+ read(fd, &read_data, sizeof(read_data)) == -1)
+ return -1;
+
+ if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
+ ++id_idx;
+ if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
+ ++id_idx;
+
+ id = read_data[id_idx];
+
+add:
+ perf_evlist__id_add(evlist, evsel, cpu, thread, id);
+ return 0;
+}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 649406f717bc..7d64185cfabd 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -72,4 +72,8 @@ void perf_evlist__id_add(struct perf_evlist *evlist,
struct perf_evsel *evsel,
int cpu, int thread, u64 id);

+int perf_evlist__id_add_fd(struct perf_evlist *evlist,
+ struct perf_evsel *evsel,
+ int cpu, int thread, int fd);
+
#endif /* __LIBPERF_INTERNAL_EVLIST_H */
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index f2863b4c61d7..a37eccf65eae 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -461,47 +461,6 @@ int perf_evlist__poll(struct evlist *evlist, int timeout)
return fdarray__poll(&evlist->core.pollfd, timeout);
}

-int perf_evlist__id_add_fd(struct evlist *evlist,
- struct evsel *evsel,
- int cpu, int thread, int fd)
-{
- u64 read_data[4] = { 0, };
- int id_idx = 1; /* The first entry is the counter value */
- u64 id;
- int ret;
-
- ret = ioctl(fd, PERF_EVENT_IOC_ID, &id);
- if (!ret)
- goto add;
-
- if (errno != ENOTTY)
- return -1;
-
- /* Legacy way to get event id.. All hail to old kernels! */
-
- /*
- * This way does not work with group format read, so bail
- * out in that case.
- */
- if (perf_evlist__read_format(&evlist->core) & PERF_FORMAT_GROUP)
- return -1;
-
- if (!(evsel->core.attr.read_format & PERF_FORMAT_ID) ||
- read(fd, &read_data, sizeof(read_data)) == -1)
- return -1;
-
- if (evsel->core.attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
- ++id_idx;
- if (evsel->core.attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
- ++id_idx;
-
- id = read_data[id_idx];
-
- add:
- perf_evlist__id_add(&evlist->core, &evsel->core, cpu, thread, id);
- return 0;
-}
-
static void perf_evlist__set_sid_idx(struct evlist *evlist,
struct evsel *evsel, int idx, int cpu,
int thread)
@@ -776,7 +735,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
}

if (evsel->core.attr.read_format & PERF_FORMAT_ID) {
- if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread,
+ if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, cpu, thread,
fd) < 0)
return -1;
perf_evlist__set_sid_idx(evlist, evsel, idx, cpu,
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index eb35b4b1d86f..80b3361613e5 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -141,10 +141,6 @@ struct evsel *
perf_evlist__find_tracepoint_by_name(struct evlist *evlist,
const char *name);

-int perf_evlist__id_add_fd(struct evlist *evlist,
- struct evsel *evsel,
- int cpu, int thread, int fd);
-
int perf_evlist__add_pollfd(struct evlist *evlist, int fd);
int perf_evlist__alloc_pollfd(struct evlist *evlist);
int perf_evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask);
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index a4a492f11849..9c284d2adcea 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -2662,7 +2662,7 @@ static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
thread++) {
int fd = FD(evsel, cpu, thread);

- if (perf_evlist__id_add_fd(evlist, evsel,
+ if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
cpu, thread, fd) < 0)
return -1;
}
--
2.21.0