On 08/09/2018 22:01, Kasper Daniel Hansen wrote:
For timing purposes, is it possible to control the number of threads /
cores when I have compiled R to use the BLAS in the Accelerate framework
(by building R using
./configure --with-blas="-framework Accelerate" --with-lapack
)
? (The alternative is of course to build R using the supplied
single-threaded BLAS)
This is a question about Accelerate not R. But the R-admin manual does say
'In recent versions of macOS, threading in Accelerate is controlled by
‘Grand Central Dispatch’ and is said not to need user control.'
It has quite a few other caveats about Accelerate, not least that it
uses an LAPACK which is missing many bug fixes, some serious.
--
Brian D. Ripley, rip...@stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford
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