Re: Changing frequency rate to perf mem

[Harald Servat <harald.servat@bsc.es>]

On 24/10/13 07:12, Andi Kleen wrote:
> Harald Servat <harald.servat@bsc.es> writes:
>>
>>    BTW, I tried to change this value by adding "-F" and "200" into the
>> argv that is passed to cmd_report by adding
>>
>>          rec_argv[i++] = strdup("-F");
>>          rec_argv[i++] = strdup("200");
>>
>>    into line 42 of perf-mem.c - just after the
>> strdup("record").
>
> You would need to increase the array size too.

Ouch! You're right! I forgot that!

>
>> Unfortunately, this seems to break something and
>> perf segfaults often. Which is the most appropriate way to tune the
>> user frequency of perf mem?
>
> Best would be probably to fix it to pass through unknown
> options, then -F/-c could be just used. I'm not sure
> if this is possible easily with the git option parser.

Sorry, I'm not sure what is the "git option parser" here.
I think that this could be implemented extending the mem_options[] in 
file builtin-mem.c lines 205-221.

> Alternatively you can just specify the command line perf mem record
> would specify directly to perf record, plus -c/-F
>
> -andi
>

Thank you very much Andi.
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