Messages in this thread | | | Date | Fri, 17 Dec 1999 15:13:08 -0700 | From | Richard Gooch <> | Subject | re: RasterMan on linux and threads |
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raster@rasterman.com writes: > On 17 Dec, Dan Kegel scribbled: > -> re http://kernelnotes.org/lnxlists/linux-kernel/lk_9912_03/msg00480.html > -> > -> Rasterman is wrong in saying that all threads run on the same > > hmm - when did that change ? i thought that was the case and was > baked up on hat asumtion by someone else a few weeks ago (primarily > the reason being to make sure the threads share caches for speed > reasons and to make sure cache concurrency issues are moe easiyl > dealt with... well thats what i unerstood... i may be wrong (2.2 or > 2.3 may have changed that)
It hasn't changed. Linux always scheduled tasks on available CPUs (sans cache affinity heuristics).
IIRC, 1.3.38 was the first kernel with stable SMP support that I played with, and it definately scheduled threads on separate CPUs (otherwise my threaded compute applications wouldn't have sped up by a factor of 2).
Regards,
Richard.... Permanent: rgooch@atnf.csiro.au Current: rgooch@ras.ucalgary.ca
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