perf evlist: Introduce perf_evlist__mmap_cb_get() (bb1b1885) · Commits · 戴 / test

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>

tools/perf/util/evlist.c

+24 −0

Original line number	Diff line number	Diff line
		@@ -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);
		}

		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,
		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 = {
		.idx = perf_evlist__mmap_cb_idx,
		.get = perf_evlist__mmap_cb_get,
		};

		if (!evlist->mmap)

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