[Devel] Re: nptl perf bench and profiling with pidns patchsets

Cedric Le Goater clg at fr.ibm.com
Mon Jun 4 07:17:27 PDT 2007


Pavel Emelianov wrote:
> Serge E. Hallyn wrote:
>> Quoting Kirill Korotaev (dev at sw.ru):
>>> Cedric,
>>>
>>> just a small note.
>>> imho it is not correct to check performance with enabled debug in memory allocator
>>> since it can influence cache efficiency much.
>>> In you case looks like you have DEBUG_SLAB enabled.
>> Hm, good point.  Cedric, did you ever run any tests with profiling and
>> debugging turned off?
> 
> I'd like to add that the results-for-comparison have to be run
> with profiler turned off. Further, if we need to know what the
> bottleneck is, the profiler is on, but the numbers get are not
> trusted.
> 
> Cedric, may I ask you to rerun the tests with both the debug and
> the profiler turned off and report the results again?

sure. let me do all debug=off first because i'm interested in some
figures.

so what do you think of the nptl perf benchmark to evaluate our 
progress ? 

C.
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