Re: Compiler performance tests on FreeBSD 10.0-CURRENT


On Sat, Sep 15, 2012 at 10:19 PM, Konstantin Belousov
<kostikbel@gmail.com> wrote:
> On Sun, Sep 16, 2012 at 12:34:45AM +0200, Dimitry Andric wrote:
>> Hi all,
>>
>> By request, I performed a series of kernel performance tests on FreeBSD
>> 10.0-CURRENT, particularly comparing the runtime performance of GENERIC
>> kernels compiled by gcc 4.2.1 and by clang 3.2.
>>
>> The attached text file[1] contains more information about the tests,
>> some semi-cooked performance data, and my conclusions.  Any errors and
>> omissions are also my fault, so if you notice them, please let me know.
>>
>> The executive summary: GENERIC kernels compiled with clang 3.2 are
>> slightly faster than those compiled by gcc 4.2.1, though the difference
>> will not very noticeable in practice.
>>
>> Last but not least, thanks to Gavin Atkinson for providing the required
>> hardware.
>
> Thank you very much for doing this.
>
> I tried to map the CPUID into more human-friendly family moniker, and it
> seems that these are Pentium-4 class CPUs. Am I right ?
>
> If yes, could you, please, rerun the tests on anything more recent than
> Core2, i.e. any Core i7-whatever class of Xeons ?

    If you can provide the tests, I can rerun it on some Nehalem class
workstations I have access to. I unfortunately don't have access to
SNB/Romley hardware yet.
Thanks,
-Garrett
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