Messages in this thread | | | Subject | sched_domains and Stream benchmark | From | Darren Hart <> | Date | Tue, 20 Apr 2004 10:43:17 -0700 |
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Andi,
You have mentioned the stream benchmark when reporting on the performance of the Opteron NUMA sched-domains scheduler. I am trying to reproduce your results and am struggling with the benchmark. Can you rpovide the details of the tests you ran. Namely your compiler settings, compile command line, and your value of N. Also I didn't see how to specify the number of threads to run, how did you specify that? I have a 4 way 1.4 GHz 1MB cache opteron machine with 7 GB of RAM.
When I ran the steeam_omp benchmark with N=4000000 I got nearly identical results (within statistical noise) from 2.6.5, 2.6.5-mm5, and 2.6.5-mm5-with_flat_domains (the patch I sent earlier). Clearly not what is expected, so I assume I am not running or building the benchmark correctly. I found the projects build system (none) and docs (minimal) to be lacking.
You mentioned your problem was fixed by some of "Ingo's tweaks". Which patches are these tweaks in and are they in the mm tree yet?
Thanks,
Darren
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