Sorry, saw the bugzilla item first... I have
Peters-iMac:IBP pd$ sysctl -n hw.ncpu 2 Peters-iMac:IBP pd$ sysctl -n hw.physicalcpu 2 Peters-iMac:IBP pd$ sysctl -n hw.logicalcpu 2 Peters-iMac:IBP pd$ ssh appleserver Last login: Mon Dec 14 11:25:08 2015 appleserver:~ pd$ sysctl -n hw.ncpu 24 appleserver:~ pd$ sysctl -n hw.physicalcpu 12 appleserver:~ pd$ sysctl -n hw.logicalcpu 24 both on Mavericks, 10.9.5. As you probably gathered (or remembered), the iMac is Core 2 Duo, so no hyperthreading. -pd On 05 Feb 2016, at 13:07 , Prof Brian Ripley <rip...@stats.ox.ac.uk> wrote: > sysctl on 10.11 has options which would enable us to differentiate between > logical and physical codes on parallel::detectCores --- however these are not > documented in Apple's online man pages, which are for 10.9. Could someone > running 10.9 and someone for 10.10 report if > > /usr/sbin/sysctl -n hw.physicalcpu > /usr/sbin/sysctl -n hw.logicalcpu > > run in a terminal work and gives the correct result? (Normally the second > will be twice the first taking account of hyperthreading.) > > Thanks in advance. > > -- > Brian D. Ripley, rip...@stats.ox.ac.uk > Emeritus Professor of Applied Statistics, University of Oxford > > _______________________________________________ > R-SIG-Mac mailing list > R-SIG-Mac@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-mac -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd....@cbs.dk Priv: pda...@gmail.com _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-mac
