diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2015-04-21 13:55:03 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-04 13:34:47 -0300 |
| commit | fb4f313d304b0a5120e870a6cd9ecf90c1023037 (patch) | |
| tree | 82cd6451ec4af753afe124bce3b8e3ad7fdfe115 /tools/perf/Documentation | |
| parent | c9758cc4569955c6d8ad519adf539848e8824c72 (diff) | |
perf kmem: Support sort keys on page analysis
Add new sort keys for page: page, order, migtype, gfp - existing
'bytes', 'hit' and 'callsite' sort keys also work for page. Note that
-s/--sort option should be preceded by either of --slab or --page option
to determine where the sort keys applies.
Now it properly groups and sorts allocation stats - so same
page/caller with different order/migtype/gfp will be printed on a
different line.
# perf kmem stat --page --caller -l 10 -s order,hit
-----------------------------------------------------------------------------
Total alloc (KB) | Hits | Order | Mig.type | GFP flags | Callsite
-----------------------------------------------------------------------------
64 | 4 | 2 | RECLAIM | 00285250 | new_slab
50,144 | 12,536 | 0 | MOVABLE | 0102005a | __page_cache_alloc
52 | 13 | 0 | UNMOVABL | 002084d0 | pte_alloc_one
40 | 10 | 0 | MOVABLE | 000280da | handle_mm_fault
28 | 7 | 0 | UNMOVABL | 000000d0 | __pollwait
20 | 5 | 0 | MOVABLE | 000200da | do_wp_page
20 | 5 | 0 | MOVABLE | 000200da | do_cow_fault
16 | 4 | 0 | UNMOVABL | 00000200 | __tlb_remove_page
16 | 4 | 0 | UNMOVABL | 000084d0 | __pmd_alloc
8 | 2 | 0 | UNMOVABL | 000084d0 | __pud_alloc
... | ... | ... | ... | ... | ...
-----------------------------------------------------------------------------
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Pekka Enberg <penberg@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/1429592107-1807-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-kmem.txt | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-kmem.txt b/tools/perf/Documentation/perf-kmem.txt index 23219c65c16f..69e181272c51 100644 --- a/tools/perf/Documentation/perf-kmem.txt +++ b/tools/perf/Documentation/perf-kmem.txt @@ -37,7 +37,11 @@ OPTIONS -s <key[,key2...]>:: --sort=<key[,key2...]>:: - Sort the output (default: frag,hit,bytes) + Sort the output (default: 'frag,hit,bytes' for slab and 'bytes,hit' + for page). Available sort keys are 'ptr, callsite, bytes, hit, + pingpong, frag' for slab and 'page, callsite, bytes, hit, order, + migtype, gfp' for page. This option should be preceded by one of the + mode selection options - i.e. --slab, --page, --alloc and/or --caller. -l <num>:: --line=<num>:: |