While it is true that MKL is threaded not all the BLAS subroutines are. Unfortunately the manual does not explicitely explain the threadedness. Furthermore, funny enough, at least some ACML subroutines are quicker than the MKL ones. Admitedly the difference became smaller with the release of MKL 10.0 but it's still there even for Harpertown. Another worthy threaded lib to try is obviously Goto BLAS. As usual, YMMV.
-----Original Message----- From: [EMAIL PROTECTED] on behalf of James Cownie Sent: Sun 18/11/2007 13:56 To: Donald Shillady Cc: beowulf@beowulf.org Subject: Re: [Beowulf] Quad-Core Parallelism On 16 Nov 2007, at 15:40, Donald Shillady wrote: > The question is whether ESSL or Parallel-ESSL is needed to do true > parallel computing on a Quad-core chip? Basically I would like to > know if anyone is working on making a Quad-core CPU parallel > (preferably f77 or f99) under RedHat LINUX? If I install RedHat > LINUX on a Quad-core CPU (thus avoiding a high speed switch) what > would be needed to run parallel f77, a new compiler? The Intel "Math Kernel LIbrary" (which includes BLAS and a lot of other goodies) http://www.intel.com/cd/software/products/asmo-na/eng/ 307757.htm has many routines which are internally parallelized for multi-core machines. So, if you're using BLAS you should be able just to link against these and get a benefit which depends on how much of your execution time was spent in the library routines. The Intel compilers also include an auto-par switch, so there's some chance that recompiling with that might help too, and, of course also include OpenMP support. (Disclaimer: I work for Intel, and haven't used MKL or auto-par myself, so as ever YMMV) -- -- Jim -- James Cownie <[EMAIL PROTECTED]> _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
