From: Mikhail Kuzminsky <mikk...@mail.ru> Subject: [Beowulf] Execution time measurements - clarification
Dear Mark, could you pls forward my message to beowulf@beowulf.org (because my messages as before can't be delivered to maillist) ? It's clarification of my previous question here. Mikhail --------------------- I have strange execution time measurements for CPU-bound jobs (to be exact, Gaussian-09 DFT frequency calculations). Results are strange for *SEQENTIAL* calculations ! Executions were performed on dual socket Opteron 2350 (Quad core) server worked under Open SuSE Linux 10.3. When I run 2 identical examples of the same batch job simultaneously, execution time of *each* job is LOWER than for single job run ! I thought that it may be wrong "own for G09" times, so I checked their via time: (time g09 *pair1.com) >&testt1 & etc But this confirms strange results: For pair of simultaneously running sequential jobs 88801.141u 52.475s 24:40:57.58 99.9% 0+0k 0+0io 1221pf+0w 88901.996u 13.472s 24:41:53.97 100.0% 0+0k 0+0io 0pf+0w For run of 1 example of the same sequential job 100365.236u 27.297s 27:53:13.53 99.9% 0+0k 0+0io 1pf+0w Is there any ideas why this situation might be ? Mikhail Kuzminsky _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
