Messages in this thread |  | | Date | Fri, 31 Jan 1997 02:47:15 -0500 | From | "David S. Miller" <> | Subject | Re: strange `time' results on dual-processor P6 systems |
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Date: Thu, 30 Jan 1997 16:01:55 -0800 From: Daniel Quinlan <quinlan@transmeta.com>
The elapsed time seems correct on both systems. However, the proportion of user to system time is more or less reversed and quite wrong for the dual-processor system.
Any ideas?
The CPU's are spinning in kernel mode on the master kernel lock we have for SMP. Userland is of course multi threaded on SMP, but the kernel is simgle threaded so all those faults being done by your test program must be processed serially.
---------------------------------------------//// Yow! 11.26 MB/s remote host TCP bandwidth & //// 199 usec remote TCP latency over 100Mb/s //// ethernet. Beat that! //// -----------------------------------------////__________ o David S. Miller, davem@caip.rutgers.edu /_____________/ / // /_/ ><
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