diff options
| author | David Ahern | 2016-11-25 14:42:13 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2016-11-29 12:50:32 -0300 |
| commit | aa58e9afb613fab74f33292705bb43beb0f1828d (patch) | |
| tree | 4c3a3158e74dd6bdf49a386aaad05c9bedc8ebeb /tools/perf/builtin-kmem.c | |
| parent | 030910c085467c7f08f49735c19c66c1baa53f76 (diff) | |
perf kmem stat: Track memory freed
Track freed memory as well as allocations and show the net in the
summary.
Committer notes:
Testing it:
# perf kmem record usleep 1
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 1.626 MB perf.data (4208 samples) ]
[root@jouet ~]# perf kmem stat --slab
SUMMARY (SLAB allocator)
========================
Total bytes requested: 234,011
Total bytes allocated: 234,504
Total bytes freed: 213,328 <------
Net total bytes allocated: 21,176
Total bytes wasted on internal fragmentation: 493
Internal fragmentation: 0.210231%
Cross CPU allocations: 4/1,963
#
Signed-off-by: David Ahern <dsahern@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1480110133-37039-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-kmem.c')
| -rw-r--r-- | tools/perf/builtin-kmem.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c index d426dcb18ce9..7fd6f1e1e293 100644 --- a/tools/perf/builtin-kmem.c +++ b/tools/perf/builtin-kmem.c @@ -49,6 +49,7 @@ struct alloc_stat { u64 ptr; u64 bytes_req; u64 bytes_alloc; + u64 last_alloc; u32 hit; u32 pingpong; @@ -62,7 +63,7 @@ static struct rb_root root_alloc_sorted; static struct rb_root root_caller_stat; static struct rb_root root_caller_sorted; -static unsigned long total_requested, total_allocated; +static unsigned long total_requested, total_allocated, total_freed; static unsigned long nr_allocs, nr_cross_allocs; static int insert_alloc_stat(unsigned long call_site, unsigned long ptr, @@ -105,6 +106,8 @@ static int insert_alloc_stat(unsigned long call_site, unsigned long ptr, } data->call_site = call_site; data->alloc_cpu = cpu; + data->last_alloc = bytes_alloc; + return 0; } @@ -223,6 +226,8 @@ static int perf_evsel__process_free_event(struct perf_evsel *evsel, if (!s_alloc) return 0; + total_freed += s_alloc->last_alloc; + if ((short)sample->cpu != s_alloc->alloc_cpu) { s_alloc->pingpong++; @@ -1128,6 +1133,11 @@ static void print_slab_summary(void) printf("\n========================\n"); printf("Total bytes requested: %'lu\n", total_requested); printf("Total bytes allocated: %'lu\n", total_allocated); + printf("Total bytes freed: %'lu\n", total_freed); + if (total_allocated > total_freed) { + printf("Net total bytes allocated: %'lu\n", + total_allocated - total_freed); + } printf("Total bytes wasted on internal fragmentation: %'lu\n", total_allocated - total_requested); printf("Internal fragmentation: %f%%\n", |