I guess Bill is right, I tried it again with BLAS disabled and got comparable times for single threaded multiplication from J904 and J903:
J904: JVERSION Engine: j904/j64avx/linux Beta-d: commercial/2022-05-19T20:41:10 Library: 9.04.01 Qt IDE: 2.0.3/5.12.8(5.15.2) Platform: Linux 64 Installer: J904 install InstallPath: /home/jpjacobs/j904 Contact: www.jsoftware.com 1 T. '' 0 A =: 3000 4000?.@$0 B =: 4000 2000?.@$0 10 timespacex 'C =: A +/ .* B' 5.73157 6.71109e7 (9!:58)"0 i. 3 _1 _1 _1 _1(9!:58)"0 i.3 1 1 1 10 timespacex 'C =: A +/ .* B' 5.81444 6.71109e7 0&T.@''^:4'' 4 10 timespacex 'C =: A +/ .* B' 3.09446 6.71109e7 J903: JVERSION Engine: j903/j64avx/linux Release-b: commercial/2022-01-28T04:10:34 Library: 9.03.08 Qt IDE: 1.9.5/5.12.8(5.15.2) Platform: Linux 64 Installer: J903 install InstallPath: /home/jpjacobs/j903 Contact: www.jsoftware.com A =: 3000 4000?.@$0 B =: 4000 2000?.@$0 (9!:58)"0 i. 3 8000000 8000000 216000 _1(9!:58)"0 i.3 1 1 1 (9!:58)"0 i. 3 _1 _1 _1 10 timespacex 'C =: A +/ .* B' 5.56894 6.71108e7 8000000 8000000 216000 (9!:58)"0 i.3 1 1 1 (9!:58)"0 i. 3 8000000 8000000 216000 10 timespacex 'C =: A +/ .* B' 3.94834 6.71108e7 I guess any differences with what your seeing could well be due to my deprecated hardware as well :p. Jan-Pieter Op zo 22 mei 2022 om 05:15 schreef bill lam <bbill....@gmail.com>: > I am confused, for the dimension of A and B, the product */3000 4000 2000 > should exceed the threshold and BLAS is used so that 0 T. should have no > effect on it. > can you check what is the result of (9!:58)"0 i. 3 > and also set _1(9!:58)"0 i.3 to disable BLAS before testing > > If the J binaries is compiled with OPENMP, the execution time of BLAS will > be about the same as that using 0 T. > otherwise using 0 T. instead of BLAS should be faster. > > > > On Sun, May 22, 2022 at 5:28 AM Jan-Pieter Jacobs < > janpieter.jac...@gmail.com> wrote: > > > That's very cool! > > > > A =: 3000 4000?.@$0 > > > > B =: 4000 2000?.@$0 > > > > 10 timespacex 'C =: A +/ .* B' > > > > 4.15287 6.71109e7 > > > > 0&T.@''^:4 '' > > > > 4 > > > > 10 timespacex 'C =: A +/ .* B' > > > > 2.30104 6.71109e7 > > > > JVERSION > > > > Engine: j904/j64avx/linux > > > > Beta-d: commercial/2022-05-19T20:41:10 > > > > Library: 9.04.01 > > > > Qt IDE: 2.0.3/5.12.8(5.15.2) > > > > Platform: Linux 64 > > > > Installer: J904 install > > > > InstallPath: /home/jpjacobs/j904 > > > > Contact: www.jsoftware.com > > > > > > However, in J903, on the same machine, I get: > > > > A =: 3000 4000?.@$0 > > > > B =: 4000 2000?.@$0 > > > > 10 timespacex 'C =: A +/ .* B' > > > > 2.70296 6.71108e7 > > > > JVERSION > > > > Engine: j903/j64avx/linux > > > > Release-b: commercial/2022-01-28T04:10:34 > > > > Library: 9.03.08 > > > > Qt IDE: 1.9.5/5.12.8(5.15.2) > > > > Platform: Linux 64 > > > > Installer: J903 install > > > > InstallPath: /home/jpjacobs/j903 > > > > Contact: www.jsoftware.com > > > > > > Am I right to conclude that single threaded matrix multiplication > actually > > got considerably slower with respect to J903 (from 2.70 s to 4.15 s) ? > > > > > > Jan-Pieter > > > > Op vr 20 mei 2022 om 21:15 schreef Henry Rich <henryhr...@gmail.com>: > > > > > If you create threads, beta-d can use them to speed up primitives. The > > > first primitive to get this treatment is +/ . * (designed & coded by > > Elijah > > > Stone). > > > > > > Say your machine has N cores. Set your startup script to execute > > > > > > 0 T. '' > > > > > > N-1 times, and your matrix products will be faster with no other action > > > needed. > > > > > > Henry Rich > > > > > > On Fri, May 20, 2022, 11:07 AM Eric Iverson <eric.b.iver...@gmail.com> > > > wrote: > > > > > > > J904-beta-d is available for windows/linux/macos. > > > > > > > > If you already run J904-beta, then upgrade is easy: > > > > load'pacman' > > > > 'upgrade'jpkg'jengine' > > > > > > > > If you have not yet installed J904-beta, time to get started! > > > > https://code.jsoftware.com/wiki/System/Installation/J904 > > > > <https://code.jsoftware.com/wiki/System/Installation/J903> > > > > > > > > Release notes: > > > > https://code.jsoftware.com/wiki/System/ReleaseNotes/J904 > > > > <https://code.jsoftware.com/wiki/System/ReleaseNotes/J903> > > > > > > > > Questions/bug reports/etc. should go to the beta forum. > > > > > ---------------------------------------------------------------------- > > > > For information about J forums see > http://www.jsoftware.com/forums.htm > > > > > > > ---------------------------------------------------------------------- > > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
