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perf kmem: Show usage if no option is specified

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As Ingo suggested, make "perf kmem" show help information.
"perf kmem stat [--caller] [--alloc] .." will show memory
statistics.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
LKML-Reference: <4B20A195.8030106@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Li Zefan 2009-12-10 15:21:57 +08:00 committed by Ingo Molnar
parent 1bbfa6f256
commit 90b86a9f7d
2 changed files with 37 additions and 28 deletions
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13
tools/perf/Documentation/perf-kmem.txt
View file

@ -8,16 +8,16 @@ perf-kmem - Tool to trace/measure kernel memory(slab) properties
SYNOPSIS
--------
[verse]
'perf kmem' {record} [<options>]
'perf kmem' {record|stat} [<options>]
DESCRIPTION
-----------
There's two variants of perf kmem:
There are two variants of perf kmem:
'perf kmem record <command>' to record the kmem events
of an arbitrary workload.
'perf kmem' to report kernel memory statistics.
'perf kmem stat' to report kernel memory statistics.
OPTIONS
-------
@ -25,8 +25,11 @@ OPTIONS
--input=<file>::
Select the input file (default: perf.data)
--stat=<caller|alloc>::
Select per callsite or per allocation statistics
--caller::
Show per-callsite statistics
--alloc::
Show per-allocation statistics
-s <key[,key2...]>::
--sort=<key[,key2...]>::

52
tools/perf/builtin-kmem.c
View file

@ -526,7 +526,7 @@ static int __cmd_kmem(void)
}
static const char * const kmem_usage[] = {
"perf kmem [<options>] {record}",
"perf kmem [<options>] {record|stat}",
NULL
};
@ -686,18 +686,17 @@ static int parse_sort_opt(const struct option *opt __used,
return 0;
}
static int parse_stat_opt(const struct option *opt __used,
static int parse_caller_opt(const struct option *opt __used,
const char *arg, int unset __used)
{
if (!arg)
return -1;
caller_flag = (alloc_flag + 1);
return 0;
}
if (strcmp(arg, "alloc") == 0)
alloc_flag = (caller_flag + 1);
else if (strcmp(arg, "caller") == 0)
caller_flag = (alloc_flag + 1);
else
return -1;
static int parse_alloc_opt(const struct option *opt __used,
const char *arg, int unset __used)
{
alloc_flag = (caller_flag + 1);
return 0;
}
@ -722,14 +721,17 @@ static int parse_line_opt(const struct option *opt __used,
static const struct option kmem_options[] = {
OPT_STRING('i', "input", &input_name, "file",
"input file name"),
OPT_CALLBACK(0, "stat", NULL, "<alloc>|<caller>",
"stat selector, Pass 'alloc' or 'caller'.",
parse_stat_opt),
OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
"show per-callsite statistics",
parse_caller_opt),
OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
"show per-allocation statistics",
parse_alloc_opt),
OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
"sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
parse_sort_opt),
OPT_CALLBACK('l', "line", NULL, "num",
"show n lins",
"show n lines",
parse_line_opt),
OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
OPT_END()
@ -773,18 +775,22 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __used)
argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
if (argc && !strncmp(argv[0], "rec", 3))
return __cmd_record(argc, argv);
else if (argc)
if (!argc)
usage_with_options(kmem_usage, kmem_options);
if (list_empty(&caller_sort))
setup_sorting(&caller_sort, default_sort_order);
if (list_empty(&alloc_sort))
setup_sorting(&alloc_sort, default_sort_order);
if (!strncmp(argv[0], "rec", 3)) {
return __cmd_record(argc, argv);
} else if (!strcmp(argv[0], "stat")) {
setup_cpunode_map();
setup_cpunode_map();
if (list_empty(&caller_sort))
setup_sorting(&caller_sort, default_sort_order);
if (list_empty(&alloc_sort))
setup_sorting(&alloc_sort, default_sort_order);
return __cmd_kmem();
return __cmd_kmem();
}
return 0;
}