diff options
author | Jiri Olsa <jolsa@kernel.org> | 2019-10-17 12:59:10 +0200 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-10-19 15:35:01 -0300 |
commit | 3805e4f303314c2b53fb217dd8549a5b9eb06b11 (patch) | |
tree | 0e0f113285ed79d8393a8b6f3feb25f14b81dba9 | |
parent | 6eb65f7a5cc553f5dffb5cea3a874f1087524d99 (diff) | |
download | linux-3805e4f303314c2b53fb217dd8549a5b9eb06b11.tar.gz linux-3805e4f303314c2b53fb217dd8549a5b9eb06b11.tar.bz2 linux-3805e4f303314c2b53fb217dd8549a5b9eb06b11.zip |
libperf: Move mmap allocation to perf_evlist__mmap_ops::get
Move allocation of the mmap array into perf_evlist__mmap_ops::get, to
centralize the mmap allocation.
Also move nr_mmap setup to perf_evlist__mmap_ops so it's centralized and
shared by both perf and libperf mmap code.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20191017105918.20873-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r-- | tools/perf/lib/evlist.c | 42 | ||||
-rw-r--r-- | tools/perf/util/evlist.c | 24 |
2 files changed, 34 insertions, 32 deletions
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c index 854efff1519d..73aac6bb2ac5 100644 --- a/tools/perf/lib/evlist.c +++ b/tools/perf/lib/evlist.c @@ -338,10 +338,6 @@ static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, boo int i; struct perf_mmap *map; - evlist->nr_mmaps = perf_cpu_map__nr(evlist->cpus); - if (perf_cpu_map__empty(evlist->cpus)) - evlist->nr_mmaps = perf_thread_map__nr(evlist->threads); - map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); if (!map) return NULL; @@ -384,18 +380,22 @@ static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, static struct perf_mmap* perf_evlist__mmap_cb_get(struct perf_evlist *evlist, bool overwrite, int idx) { - struct perf_mmap *map = &evlist->mmap[idx]; + struct perf_mmap *maps; - if (overwrite) { - if (!evlist->mmap_ovw) { - evlist->mmap_ovw = perf_evlist__alloc_mmap(evlist, true); - if (!evlist->mmap_ovw) - return NULL; - } - map = &evlist->mmap_ovw[idx]; + maps = overwrite ? evlist->mmap_ovw : evlist->mmap; + + if (!maps) { + maps = perf_evlist__alloc_mmap(evlist, overwrite); + if (!maps) + return NULL; + + if (overwrite) + evlist->mmap_ovw = maps; + else + evlist->mmap = maps; } - return map; + return &maps[idx]; } #define FD(e, x, y) (*(int *) xyarray__entry(e->fd, x, y)) @@ -556,6 +556,17 @@ out_unmap: return -1; } +static int perf_evlist__nr_mmaps(struct perf_evlist *evlist) +{ + int nr_mmaps; + + nr_mmaps = perf_cpu_map__nr(evlist->cpus); + if (perf_cpu_map__empty(evlist->cpus)) + nr_mmaps = perf_thread_map__nr(evlist->threads); + + return nr_mmaps; +} + int perf_evlist__mmap_ops(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops, struct perf_mmap_param *mp) @@ -567,10 +578,7 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist, if (!ops || !ops->get || !ops->mmap) return -EINVAL; - if (!evlist->mmap) - evlist->mmap = perf_evlist__alloc_mmap(evlist, false); - if (!evlist->mmap) - return -ENOMEM; + evlist->nr_mmaps = perf_evlist__nr_mmaps(evlist); perf_evlist__for_each_entry(evlist, evsel) { if ((evsel->attr.read_format & PERF_FORMAT_ID) && diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 6cda5a311ba5..5cded4ec5806 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -599,9 +599,6 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist, int i; struct mmap *map; - evlist->core.nr_mmaps = perf_cpu_map__nr(evlist->core.cpus); - if (perf_cpu_map__empty(evlist->core.cpus)) - evlist->core.nr_mmaps = perf_thread_map__nr(evlist->core.threads); map = zalloc(evlist->core.nr_mmaps * sizeof(struct mmap)); if (!map) return NULL; @@ -639,19 +636,21 @@ 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; + struct mmap *maps; - if (overwrite) { - maps = evlist->overwrite_mmap; + maps = overwrite ? evlist->overwrite_mmap : evlist->mmap; - if (!maps) { - maps = evlist__alloc_mmap(evlist, true); - if (!maps) - return NULL; + if (!maps) { + maps = evlist__alloc_mmap(evlist, overwrite); + if (!maps) + return NULL; + if (overwrite) { evlist->overwrite_mmap = maps; if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); + } else { + evlist->mmap = maps; } } @@ -812,11 +811,6 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, .mmap = perf_evlist__mmap_cb_mmap, }; - if (!evlist->mmap) - evlist->mmap = evlist__alloc_mmap(evlist, false); - if (!evlist->mmap) - return -ENOMEM; - evlist->core.mmap_len = evlist__mmap_size(pages); pr_debug("mmap size %zuB\n", evlist->core.mmap_len); mp.core.mask = evlist->core.mmap_len - page_size - 1; |