Messages in this thread | | | Date | Tue, 10 Aug 2004 19:21:43 -0700 (PDT) | From | <> | Subject | Re: Scheduler fairness problem on 2.6 series (Attn: Nick Piggin and others) |
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--- William Lee Irwin III <wli@holomorphy.com> wrote: > > Wakeup bonuses etc. are starving tasks. Could you try Peter Williams' > SPA patches with the do_promotions() function? I suspect these should > pass your tests. > > > -- wli >
I tried the patch-2.6.7-spa_hydra_FULL-v4.0 patch
I only changed the value of /proc/sys/kernel/cpusched/mode to switch between different patches.
The 2 threads test passes successfuly (improvement over stock 2.6.7) but none passed the 20 threads test:
eb
Tue Aug 10 19:10:48 PDT 2004 >>>>>>> delta = 6 Tue Aug 10 19:11:03 PDT 2004 >>>>>>> delta = 16 Tue Aug 10 19:11:13 PDT 2004 >>>>>>> delta = 9 Tue Aug 10 19:11:24 PDT 2004 >>>>>>> delta = 11 Tue Aug 10 19:11:34 PDT 2004 >>>>>>> delta = 10 Tue Aug 10 19:11:45 PDT 2004 >>>>>>> delta = 11 Tue Aug 10 19:11:56 PDT 2004 >>>>>>> delta = 11 Tue Aug 10 19:12:06 PDT 2004 >>>>>>> delta = 10
pb
Tue Aug 10 19:07:52 PDT 2004 >>>>>>> delta = 3 Tue Aug 10 19:07:55 PDT 2004 >>>>>>> delta = 3 Tue Aug 10 19:07:59 PDT 2004 >>>>>>> delta = 4 Tue Aug 10 19:08:02 PDT 2004 >>>>>>> delta = 3 Tue Aug 10 19:08:05 PDT 2004 >>>>>>> delta = 3
sc
Tue Aug 10 19:08:28 PDT 2004 >>>>>>> delta = 3 Tue Aug 10 19:09:08 PDT 2004 >>>>>>> delta = 3 Tue Aug 10 19:09:17 PDT 2004 >>>>>>> delta = 3 Tue Aug 10 19:09:23 PDT 2004 >>>>>>> delta = 3 Tue Aug 10 19:09:49 PDT 2004 >>>>>>> delta = 3 Tue Aug 10 19:09:53 PDT 2004 >>>>>>> delta = 3 Tue Aug 10 19:09:55 PDT 2004 >>>>>>> delta = 3
eb seemed to be the worst of the bunch with quite long system hangs on this particular test. With the default settings of:
base_promotion_interval 255 compute 0 cpu_hog_threshold 900 ia_threshold 900 initial_ia_bonus 1 interactive 0 log_at_exit 0 max_ia_bonus 9 max_tpt_bonus 4 sched_batch_time_slice_multiplier 10 sched_iso_threshold 50 sched_rr_time_slice 100 time_slice 100
I am not very familiar with all the parameters, so I just kept the defaults
Anything else I could try?
Nicolas
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