Commit-ID: 2c5f6d876b4edda8740f5a2826cf9b1a67fa76fb Gitweb: https://git.kernel.org/tip/2c5f6d876b4edda8740f5a2826cf9b1a67fa76fb Author: Kan Liang <kan.li...@linux.intel.com> AuthorDate: Tue, 6 Mar 2018 10:36:00 -0500 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Thu, 8 Mar 2018 10:05:50 -0300
perf evlist: Store 'overwrite' in struct perf_mmap It has been determined that the map is for overwrite mode (evlist->overwrite_mmap) or non-overwrite mode (evlist->mmap) when calling perf_evlist__alloc_mmap(). Store the information in struct perf_mmap, which will be used later to simplify the perf_mmap__read*() interfaces. Signed-off-by: Kan Liang <kan.li...@linux.intel.com> Suggested-by: Jiri Olsa <jo...@kernel.org> Acked-by: Jiri Olsa <jo...@kernel.org> Cc: Andi Kleen <a...@linux.intel.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Wang Nan <wangn...@huawei.com> Link: http://lkml.kernel.org/r/1520350567-80082-1-git-send-email-kan.li...@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/evlist.c | 8 +++++--- tools/perf/util/mmap.h | 1 + 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 41a4666f1519..a59281d64368 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -722,7 +722,8 @@ void perf_evlist__munmap(struct perf_evlist *evlist) zfree(&evlist->overwrite_mmap); } -static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist) +static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist, + bool overwrite) { int i; struct perf_mmap *map; @@ -736,6 +737,7 @@ static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist) for (i = 0; i < evlist->nr_mmaps; i++) { map[i].fd = -1; + map[i].overwrite = overwrite; /* * When the perf_mmap() call is made we grab one refcount, plus * one extra to let perf_mmap__consume() get the last @@ -779,7 +781,7 @@ static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, maps = evlist->overwrite_mmap; if (!maps) { - maps = perf_evlist__alloc_mmap(evlist); + maps = perf_evlist__alloc_mmap(evlist, true); if (!maps) return -1; evlist->overwrite_mmap = maps; @@ -1029,7 +1031,7 @@ int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, struct mmap_params mp; if (!evlist->mmap) - evlist->mmap = perf_evlist__alloc_mmap(evlist); + evlist->mmap = perf_evlist__alloc_mmap(evlist, false); if (!evlist->mmap) return -ENOMEM; diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h index ec7d3a24e276..71137977af28 100644 --- a/tools/perf/util/mmap.h +++ b/tools/perf/util/mmap.h @@ -20,6 +20,7 @@ struct perf_mmap { int fd; refcount_t refcnt; u64 prev; + bool overwrite; struct auxtrace_mmap auxtrace_mmap; char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8); };
