On 10/12/16 00:22, Paul Gilbert wrote:
In R 3.3.2 detectCores() in package parallel reports 2 rather than 1 on
Raspberry Pi B+ running Raspbian. (This report is just 'for the record'.
The model is superseded and I think no longer produced.) The problem
seems to be caused by
grep processor /proc/cpuinfo
processor : 0
model name : ARMv6-compatible processor rev 7 (v6l)
(On Raspberry Pi 2 and 3 there is no error because the model name lines are
model name : ARMv7 Processor rev 5 (v7l)
model name : ARMv7 Processor rev 4 (v7l)
)
I posted a related bug report to R bugzilla,
<https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=17213>. The patch
included in that report is mainly about detecting physical CPUs across
multiple CPU sockets, but should also fix this issue.
--
Mikko Korpela
Department of Geosciences and Geography
University of Helsinki
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