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perf evlist: Introduce perf_evlist__mmap_cb_get()

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Add the perf_evlist__mmap_cb_get() function to return 'struct perf_mmap'
object during perf_evlist__mmap_ops() call.

The array of 'struct mmap' is allocated via evlist__alloc_mmap(), in
this callback we simply returns pointer to the base object.

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/20191007125344.14268-20-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2019-10-07 14:53:27 +02:00 committed by Arnaldo Carvalho de Melo
parent 9abd2ab237
commit bb1b1885e2
1 changed files with 24 additions and 0 deletions
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24
tools/perf/util/evlist.c
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@ -750,6 +750,29 @@ perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist,
auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, idx, per_cpu); auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, idx, per_cpu);
} }
static struct perf_mmap*
perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx)
{
struct evlist *evlist = container_of(_evlist, struct evlist, core);
struct mmap *maps = evlist->mmap;
if (overwrite) {
maps = evlist->overwrite_mmap;
if (!maps) {
maps = evlist__alloc_mmap(evlist, true);
if (!maps)
return NULL;
evlist->overwrite_mmap = maps;
if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
}
}
return &maps[idx].core;
}
static int evlist__mmap_per_cpu(struct evlist *evlist, static int evlist__mmap_per_cpu(struct evlist *evlist,
struct mmap_params *mp) struct mmap_params *mp)
{ {
@ -948,6 +971,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
}; };
struct perf_evlist_mmap_ops ops __maybe_unused = { struct perf_evlist_mmap_ops ops __maybe_unused = {
.idx = perf_evlist__mmap_cb_idx, .idx = perf_evlist__mmap_cb_idx,
.get = perf_evlist__mmap_cb_get,
}; };
if (!evlist->mmap) if (!evlist->mmap)