The GOMP_CPU_AFFINITY will only work for OpenMP benchmarks (of which only a subset of the parsec benchmarks have OMP versions). For pthread implementations (including Splash2 benchmarks) you have to use pthread_affinity() scheduling, requiring you to modify the benchmark source code.
There are comments in the splash2 code that indicate where it would be advisable to pin the threads to cores. The GOM_CPU_AFFINITY is an environment variable, from which the OMP clauses will check at run-time for. You can even set that variable from within the benchmark source code as well (I am sure google can provide a better and more detailed explanation) Malek On Tue, Jul 24, 2012 at 2:25 PM, shervin hajiamini <hajamini_2...@yahoo.com>wrote: > Hi Biswabandan, > > Thank you very much for your help. If I want to have 32 cores, shall I add > the following to .rcS script file? > > GOMP_CPU_AFFINITY = "0 1 2 3 ...31". > > Or is there another way for system with greater number of cores? > > Can I apply this method for SPLASH-2 benchmark as well? > > Thanks, > Shervin > > --- On *Tue, 7/24/12, gem5-users-requ...@gem5.org < > gem5-users-requ...@gem5.org>* wrote: > > Message: 4 > Date: Tue, 24 Jul 2012 07:56:06 +0530 > From: biswabandan panda > <biswa....@gmail.com<http://mc/compose?to=biswa....@gmail.com> > > > To: gem5 users mailing list > <gem5-users@gem5.org<http://mc/compose?to=gem5-users@gem5.org> > > > Subject: Re: [gem5-users] assign one thread per core in Parsec > Message-ID: > > <CADFuLAtoyXYq00D7ZiJrar1sm=V=PN5Jo4pycP=jukjlfee...@mail.gmail.com<http://mc/compose?to=jukjlfee...@mail.gmail.com> > > > Content-Type: text/plain; charset="windows-1252" > > export GOMP_CPU_AFFINITY="0 1 2 3" > > put this if u r using 4 core system with 4 threads. it ll pin the threads > > On Tue, Jul 24, 2012 at 7:35 AM, shervin hajiamini > <hajamini_2...@yahoo.com <http://mc/compose?to=hajamini_2...@yahoo.com> > >wrote: > > > Hi all, > > > > > > > > I am running PARSEC suit (canneal) on 4 cores (O3). The workload is NOT > > equally distributed among the cores. As I have created canneal?s .rcS > file > > with 4 threads, could anybody please let me know how I can assign JUST > one > > thread per core in PARSEC so that the total workload is distributed > equally > > among the cores? > > > > > > > > Regards, > > > > Shervin > > > > _______________________________________________ > > gem5-users mailing list > > gem5-users@gem5.org <http://mc/compose?to=gem5-users@gem5.org> > > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > > > > > -- > > *thanks®ards > * > *BISWABANDAN* > *Any intelligent fool can make things bigger, more complex, and more > violent. > It takes a touch of genius - and a lot of courage - to move in the opposite > direction.* > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://m5sim.org/cgi-bin/mailman/private/gem5-users/attachments/20120724/d94ef3e0/attachment-0001.html > > > > ------------------------------ > > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
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