Scheduler fairness problem on 2.6 series (Attn: Nick Piggin and others)
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Quoted 6 lines · --- Ingo Molnar
could you also try the 2.6.8-rc4-mm1 kernel? It has the array-switch disabled which _could_ lead to smoother timeslice distribution. It still has wakeup bonuses though.
Ingo
Sorry I didn't have the chance to try this test before: I didn't try it on 2.6.8.1-mm1 as I saw that maybe the patch related to the array sawitching was dropped.
Anyway, I tried the test on 2.6.8-rc4-mm1 and it fails the test with 2 and 20 threads (delays of about 3 seconds for 2 threads, and 5 seconds with 20).
Nicolas