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author | Namhyung Kim <namhyung@kernel.org> | 2015-04-21 13:55:06 +0900 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-04 13:34:48 -0300 |
commit | 0c160d495b5616e071bb4f873812e8f473128149 (patch) | |
tree | 54b6b6367a98f8d5c28156f757a4e7603842a49c /tools/perf/builtin-kmem.c | |
parent | 0e11115644b39ff9e986eb308b6c44ca75cd475f (diff) | |
download | linux-0c160d495b5616e071bb4f873812e8f473128149.tar.gz linux-0c160d495b5616e071bb4f873812e8f473128149.tar.bz2 linux-0c160d495b5616e071bb4f873812e8f473128149.zip |
perf kmem: Add kmem.default config option
Currently perf kmem command will select --slab if neither --slab nor
--page is given for backward compatibility. Add kmem.default config
option to select the default value ('page' or 'slab').
# cat ~/.perfconfig
[kmem]
default = page
# perf kmem stat
SUMMARY (page allocator)
========================
Total allocation requests : 1,518 [ 6,096 KB ]
Total free requests : 1,431 [ 5,748 KB ]
Total alloc+freed requests : 1,330 [ 5,344 KB ]
Total alloc-only requests : 188 [ 752 KB ]
Total free-only requests : 101 [ 404 KB ]
Total allocation failures : 0 [ 0 KB ]
...
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Pekka Enberg <penberg@kernel.org>
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: Taeung Song <treeze.taeung@gmail.com>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/1429592107-1807-6-git-send-email-namhyung@kernel.org
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 | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c index 1c668953c7ec..828b7284e547 100644 --- a/tools/perf/builtin-kmem.c +++ b/tools/perf/builtin-kmem.c @@ -28,6 +28,10 @@ static int kmem_slab; static int kmem_page; static long kmem_page_size; +static enum { + KMEM_SLAB, + KMEM_PAGE, +} kmem_default = KMEM_SLAB; /* for backward compatibility */ struct alloc_stat; typedef int (*sort_fn_t)(void *, void *); @@ -1710,7 +1714,8 @@ static int parse_sort_opt(const struct option *opt __maybe_unused, if (!arg) return -1; - if (kmem_page > kmem_slab) { + if (kmem_page > kmem_slab || + (kmem_page == 0 && kmem_slab == 0 && kmem_default == KMEM_PAGE)) { if (caller_flag > alloc_flag) return setup_page_sorting(&page_caller_sort, arg); else @@ -1826,6 +1831,22 @@ static int __cmd_record(int argc, const char **argv) return cmd_record(i, rec_argv, NULL); } +static int kmem_config(const char *var, const char *value, void *cb) +{ + if (!strcmp(var, "kmem.default")) { + if (!strcmp(value, "slab")) + kmem_default = KMEM_SLAB; + else if (!strcmp(value, "page")) + kmem_default = KMEM_PAGE; + else + pr_err("invalid default value ('slab' or 'page' required): %s\n", + value); + return 0; + } + + return perf_default_config(var, value, cb); +} + int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused) { const char * const default_slab_sort = "frag,hit,bytes"; @@ -1862,14 +1883,19 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused) struct perf_session *session; int ret = -1; + perf_config(kmem_config, NULL); argc = parse_options_subcommand(argc, argv, kmem_options, kmem_subcommands, kmem_usage, 0); if (!argc) usage_with_options(kmem_usage, kmem_options); - if (kmem_slab == 0 && kmem_page == 0) - kmem_slab = 1; /* for backward compatibility */ + if (kmem_slab == 0 && kmem_page == 0) { + if (kmem_default == KMEM_SLAB) + kmem_slab = 1; + else + kmem_page = 1; + } if (!strncmp(argv[0], "rec", 3)) { symbol__init(NULL); |