Messages in this thread | | | From | Con Kolivas <> | Subject | Re: [PATCH] 2.6.0 batch scheduling, HT aware | Date | Sat, 27 Dec 2003 22:15:01 +1100 |
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On Sat, 27 Dec 2003 22:09, Pavel Machek wrote: > So... even on normal SMP, > "task-on-other-cpu-slows-down-task-on-this-cpu" effect exists. Okay, > it is not as visible as on HT machine (50% slowdown), but its > definitely there.
Sure but I think we're getting pedantic here. The problem is really simple - a uniprocessor HT desktop booted in SMP mode feels half the speed while running setiathome (or video encoding or whatever cpu bound task) compared to booting it in UP mode. So, ironically, enabling the HT makes the machine feel slower when running multiple tasks. And there will be a heck of a lot of these in the future.
Con
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