[tip: perf/core] libperf: Add perf_evlist_mmap_ops::get callback

tip-bot2 for Jiri Olsa
2019-10-15T05:36:28Z

The following commit has been merged into the perf/core branch of tip:

Commit-ID: 3a8bb58121987a8405d6f96cd8815025e564605d
Gitweb: https://git.kernel.org/tip/3a8bb58121987a8405d6f96cd8815025e564605d
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:24 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:21:11 -03:00

libperf: Add perf_evlist_mmap_ops::get callback

Add the perf_evlist_mmap_ops::get callback to be called in
mmap_per_evsel() to get/allocate the 'struct perf_mmap' object.

Add the libperf's perf_evlist__mmap_cb_get() function as libperf's get
callback.

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 <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-17-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 18 ++++++++++--------
tools/perf/lib/include/internal/evlist.h | 3 +++
2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 3832d3e..4f49de5 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -340,7 +340,7 @@ static void perf_evlist__set_sid_idx(struct perf_evlist *evlist,
}

static struct perf_mmap*
-perf_evlist__map_get(struct perf_evlist *evlist, bool overwrite, int idx)
+perf_evlist__mmap_cb_get(struct perf_evlist *evlist, bool overwrite, int idx)
{
struct perf_mmap *map = &evlist->mmap[idx];

@@ -359,8 +359,8 @@ perf_evlist__map_get(struct perf_evlist *evlist, bool overwrite, int idx)
#define FD(e, x, y) (*(int *) xyarray__entry(e->fd, x, y))

static int
-mmap_per_evsel(struct perf_evlist *evlist, int idx,
- struct perf_mmap_param *mp, int cpu_idx,
+mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
+ int idx, struct perf_mmap_param *mp, int cpu_idx,
int thread, int *_output, int *_output_overwrite)
{
int evlist_cpu = perf_cpu_map__cpu(evlist->cpus, cpu_idx);
@@ -379,7 +379,7 @@ mmap_per_evsel(struct perf_evlist *evlist, int idx,
if (cpu == -1)
continue;

- map = perf_evlist__map_get(evlist, overwrite, idx);
+ map = ops->get(evlist, overwrite, idx);
if (map == NULL)
return -ENOMEM;

@@ -439,7 +439,7 @@ mmap_per_thread(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
if (ops->idx)
ops->idx(evlist, mp, thread, false);

- if (mmap_per_evsel(evlist, thread, mp, 0, thread,
+ if (mmap_per_evsel(evlist, ops, thread, mp, 0, thread,
&output, &output_overwrite))
goto out_unmap;
}
@@ -467,7 +467,7 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
ops->idx(evlist, mp, cpu, true);

for (thread = 0; thread < nr_threads; thread++) {
- if (mmap_per_evsel(evlist, cpu, mp, cpu,
+ if (mmap_per_evsel(evlist, ops, cpu, mp, cpu,
thread, &output, &output_overwrite))
goto out_unmap;
}
@@ -488,7 +488,7 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
const struct perf_cpu_map *cpus = evlist->cpus;
const struct perf_thread_map *threads = evlist->threads;

- if (!ops)
+ if (!ops || !ops->get)
return -EINVAL;

if (!evlist->mmap)
@@ -512,7 +512,9 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
{
struct perf_mmap_param mp;
- struct perf_evlist_mmap_ops ops = { 0 };
+ struct perf_evlist_mmap_ops ops = {
+ .get = perf_evlist__mmap_cb_get,
+ };

evlist->mmap_len = (pages + 1) * page_size;
mp.mask = evlist->mmap_len - page_size - 1;
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 053f620..9bc3a21 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -29,9 +29,12 @@ struct perf_evlist {

typedef void
(*perf_evlist_mmap__cb_idx_t)(struct perf_evlist*, struct perf_mmap_param*, int, bool);
+typedef struct perf_mmap*
+(*perf_evlist_mmap__cb_get_t)(struct perf_evlist*, bool, int);

struct perf_evlist_mmap_ops {
perf_evlist_mmap__cb_idx_t idx;
+ perf_evlist_mmap__cb_get_t get;
};

int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);