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perf kmem: Add --sort hit and --sort frag 

This patch adds support for "--sort hit" and "--sort frag" to
the "perf kmem" tool. The former was already mentioned in the
help text and the latter is useful for finding call-sites that
exhibit worst case behavior for SLAB allocators.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Cc: linux-mm@kvack.org <linux-mm@kvack.org>
LKML-Reference: <1258883880-7149-1-git-send-email-penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Pekka Enberg 2009-11-22 11:58:00 +02:00 committed by Ingo Molnar
parent 96b02d78a7
commit f3ced7cdb2
1 changed files with 28 additions and 1 deletions
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29
tools/perf/builtin-kmem.c
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@ -443,6 +443,15 @@ static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
return 0;
}
static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
if (l->hit < r->hit)
return -1;
else if (l->hit > r->hit)
return 1;
return 0;
}
static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
if (l->bytes_alloc < r->bytes_alloc)
@ -452,6 +461,20 @@ static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
return 0;
}
static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
double x, y;
x = fragmentation(l->bytes_req, l->bytes_alloc);
y = fragmentation(r->bytes_req, r->bytes_alloc);
if (x < y)
return -1;
else if (x > y)
return 1;
return 0;
}
static int parse_sort_opt(const struct option *opt __used,
const char *arg, int unset __used)
{
@ -464,8 +487,12 @@ static int parse_sort_opt(const struct option *opt __used,
sort_fn = ptr_cmp;
else if (strcmp(arg, "call_site") == 0)
sort_fn = callsite_cmp;
else if (strcmp(arg, "hit") == 0)
sort_fn = hit_cmp;
else if (strcmp(arg, "bytes") == 0)
sort_fn = bytes_cmp;
else if (strcmp(arg, "frag") == 0)
sort_fn = frag_cmp;
else
return -1;
@ -517,7 +544,7 @@ static const struct option kmem_options[] = {
"stat selector, Pass 'alloc' or 'caller'.",
parse_stat_opt),
OPT_CALLBACK('s', "sort", NULL, "key",
"sort by key: ptr, call_site, hit, bytes",
"sort by key: ptr, call_site, hit, bytes, frag",
parse_sort_opt),
OPT_CALLBACK('l', "line", NULL, "num",
"show n lins",