Hin-Tak Leung wrote: > Prof Brian Ripley wrote: > >> On Thu, 13 Oct 2005, Hin-Tak Leung wrote: <snipped> >>> (2) The interesting question: As I understand it (could be wrong), >>> R Win32 is (partly) multi-threaded, and the native linux R is not. >>> Is is possible to have better performance or CPU utilisation >>> on multi-CPU systems running Win32 R under Wine rather than natively? >>> At least on certain specific application areas? >> >> >> >> Rterm.exe is multithreaded, but the second thread is only used for >> input. RGui.exe is singlethreaded. As R for Windows uses a DLL it is >> about the same speed (running Windows natively on the same hardware) >> as R under ix86 Linux using a shared library, and that is appreciably >> slower than R under ix86 Linux without (see the R-admin manual). R >> under Linux can make use of a multithreaded BLAS, but I know of none >> available for Windows. > > > Is the Intel MKL not available form Windows? Somewhat surprising...
Sorry to reply to my own post. Actually, FAQ 8.2 for r-on-windows and the netlib FAQ: http://cran.r-project.org/bin/windows/base/rw-FAQ.html#Can-I-use-a-fast-BLAS_003f http://www.netlib.org/blas/faq.html#9 seems to suggest otherwise - from what it says, (1) the BLAS dll can be conveniently replaced without recompiling, (2) most vendor BLAS implementations are multi-threaded. In fact the Atlas implementation is explicitly named in both places. Now, the interesting questions are: (1) is Atlas multi-threaded on *every* platform, or more specifically, on Windows?, (2) Can wine use the atlas dll under x86 linux? Hin-Tak Leung ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
