Hi Pekka,
On Tue, Jan 22, 2013 at 10:41 AM, Pekka Enberg <penb...@kernel.org> wrote:
> (Adding acme to CC.)
>
> On Tue, Jan 22, 2013 at 11:46 AM, Ezequiel Garcia
> <ezequiel.gar...@free-electrons.com> wrote:
>> From: Ezequiel Garcia <elezegar...@gmail.com>
>>
>> The purpose of trace_analyze.py tool is to perform static
>> and dynamic memory analysis using a kmem ftrace
>> log file and a built kernel tree.
>>
>> This script and related work has been done on the CEWG/2012 project:
>> "Kernel dynamic memory allocation tracking and reduction"
>> (More info here [1])
>>
>> It produces mainly two kinds of outputs:
>> * an account-like output, similar to the one given by Perf, example below.
>> * a ring-char output, examples here [2].
>>
>> $ ./scripts/tracing/trace_analyze.py -k linux -f kmem.log --account-file
>> account.txt
>> $ ./scripts/tracing/trace_analyze.py -k linux -f kmem.log -c account.txt
>>
>> This will produce an account file like this:
>>
>> current bytes allocated: 669696
>> current bytes requested: 618823
>> current wasted bytes: 50873
>> number of allocs: 7649
>> number of frees: 2563
>> number of callers: 115
>>
>> total waste net alloc/free caller
>> ---------------------------------------------
>> 299200 0 298928 1100/1 alloc_inode+0x4fL
>> 189824 0 140544 1483/385 __d_alloc+0x22L
>> 51904 0 47552 811/68 sysfs_new_dirent+0x4eL
>> [...]
>>
>> [1] http://elinux.org/Kernel_dynamic_memory_analysis
>> [2]
>> http://elinux.org/Kernel_dynamic_memory_analysis#Current_dynamic_footprint
>>
>> Cc: Pekka Enberg <penb...@kernel.org>
>> Cc: Steven Rostedt <rost...@goodmis.org>
>> Cc: Frederic Weisbecker <fweis...@gmail.com>
>> Cc: Ingo Molnar <mi...@redhat.com>
>> Signed-off-by: Ezequiel Garcia <elezegar...@gmail.com>
>
> Looks really useful! Dunno if this makes most sense as a separate
> script or as an extension perf.
>
I'm glad you think so.
Regarding the perf extension, I would have to think about that.
I guess you mean convert this script to use the python binding?
Will it still be able to work off-box? (a typical embedded scenario)
--
Ezequiel
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