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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
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@@ -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...]>::