* Jie Chen <[EMAIL PROTECTED]> wrote:
>> sorry to be dense, but could you give me instructions how i could
>> remove the affinity mask and test the "barrier overhead" myself? I
>> have built "pthread_sync" and it outputs numbers for me - which one
>> would be the barrier overhead: Reference_time_1 ?
>
> To disable affinity, do configure --enable-public-release
> --disable-thread_affinity. You should see barrier overhead like the
> following: Computing BARRIER time
>
> Sample_size Average Min Max S.D. Outliers
> 20 19.486162 19.482250 19.491400 0.002740 0
>
> BARRIER time = 19.486162 microseconds +/- 0.005371
> BARRIER overhead = 8.996257 microseconds +/- 0.006575
ok, i did that and rebuilt. I also did "make check" and got
src/pthread_sync which i can run. The only thing i'm missing, if i run
src/pthread_sync, it outputs "PARALLEL time":
PARALLEL time = 22.486103 microseconds +/- 3.944821
PARALLEL overhead = 10.638658 microseconds +/- 10.854154
not "BARRIER time". I've re-read the discussion and found no hint about
how to build and run a barrier test. Either i missed it or it's so
obvious to you that you didnt mention it :-)
Ingo
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