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Re: [patch, mips] Improved memset for MIPS


On 09/10/2013 05:12 PM, Steve Ellcey wrote:
> On Tue, 2013-09-10 at 17:01 -0400, Carlos O'Donell wrote:
> 
>>> Now that I can see the results of 'make bench' I do have a question,
>>> what is the difference between the results in bench-memset.out and
>>> bench-memset-ifunc.out?  MIPS doesn't yet support IFUNC.  It looks like
>>> the results in the two files are pretty close, so maybe they are
>>> identical runs on machines with no IFUNC?
>>
>> You get the default implementation of __libc_ifunc_impl_list (the function
>> used by the testing infrastructure to iterate the functions implemented
>> as ifuncs) which adds no additional functions to the test list. You still
>> test the usual defaults e.g. simple, builtin, and original function entry.
>> Therefore it's the same as the non-IFUNC version with the results being
>> the same modulo testing variance.
>>
>> Does that answer your question?
> 
> I think so, but just to be clear: If I did have IFUNC and 4 different
> implementations of memset (for example), would the testing
> infrastructure run and benchmark all 4 versions of memset?

Yes.

Cheers,
Carlos.


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