Messages in this thread | | | Date | Wed, 15 May 2002 14:16:33 -0400 (EDT) | From | Bill Davidsen <> | Subject | Re: [RFC][PATCH] iowait statistics |
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On Wed, 15 May 2002, William Lee Irwin III wrote:
> Boots compiles and runs on an 4-way physical HT box. I didn't wake > the evil twins to cut down on the number of variables so it stayed > 4-way despite the ability to go 8-way. > > Sliding window of 120 seconds, sampled every 15 seconds, under a > repetitive kernel compile load: > > Wed May 15 09:56:37 PDT 2002 > cpu 60701 0 5137 203545 9327 > cpu0 15048 0 1566 50868 2298 > cpu1 15257 0 1176 50818 2392 > cpu2 15248 0 1346 50802 2247 > cpu3 15148 0 1049 51057 2390 [... snip ...] > Wed May 15 09:58:22 PDT 2002 > cpu 98583 0 8082 204779 9328 > cpu0 24538 0 2254 51205 2298 > cpu1 24521 0 2065 51180 2393 > cpu2 24704 0 1978 51230 2247 > cpu3 24820 0 1785 51164 2390 > > > It looks very constant, not sure if it should be otherwise.
You show-offs with your big memory and everything in it... Okay, boot that puppy with mem=256m and try that again, particularly with -j4 (or -j8 with HT on). I bet THAT will give you some IOwait!
I think you do want to try HT after you find out the memory is small enough. Pure curiousity on my part, I assume it will work, although the results might not be what I expect.
-- bill davidsen <davidsen@tmr.com> CTO, TMR Associates, Inc Doing interesting things with little computers since 1979.
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