[R-sig-hpc] parallel and openblas
greatauklet at gmail.com
Mon Apr 23 21:53:11 CEST 2012
Parallel and openblas don't seem to mix well on my machine. If I link openblas, a job executed through parallel (using either the multicore or snow (local socket cluster) setup), each of my 8 cores only operates at 1/8 of 100% (taking a little longer than serial execution). Linking to the reference blas or to single-threaded atlas does not cause this handicap when running snow or multicore.
Is this a known problem (My google attempts were fruitless)? If yes, is there a fix for it? Do MKL or multi-threaded atlas have the same issues?
Thank you for your time.
Post-doctoral Fellow phone: 907-226 4672
University of Washington or: 907-235 0728
School of Aquatic and Fishery Sciences Seattle, USA
debian squeeze on 8-core Xeon
R version 2.15.0 (2012-03-30)
Platform: x86_64-unknown-linux-gnu (64-bit)
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 LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
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 LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
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