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SubjectRe: [patch] voluntary-preempt-2.6.9-rc1-bk12-R6
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On Mon, 2004-09-06 at 07:06, Ingo Molnar wrote:
> i've released the -R6 patch:
>
> http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc1-bk12-R6

I get these latencies when I cause the machine to swap by compiling a
kernel with make -j32. They get bigger as the machine gets further into
swap.

Every 2.0s: head -60 /proc/latency_trace Wed Sep 8 02:51:40 2004

preemption latency trace v1.0.6 on 2.6.9-rc1-bk12-VP-R6
--------------------------------------------------
latency: 605 us, entries: 5 (5) [VP:1 KP:1 SP:1 HP:1 #CPUS:1]
-----------------
| task: kswapd0/35, uid:0 nice:0 policy:0 rt_prio:0
-----------------
=> started at: get_swap_page+0x23/0x490
=> ended at: get_swap_page+0x13f/0x490
=======>
00000001 0.000ms (+0.606ms): get_swap_page (add_to_swap)
00000001 0.606ms (+0.000ms): sub_preempt_count (get_swap_page)
00000001 0.606ms (+0.000ms): update_max_trace (check_preempt_timing)
00000001 0.606ms (+0.000ms): _mmx_memcpy (update_max_trace)
00000001 0.607ms (+0.000ms): kernel_fpu_begin (_mmx_memcpy)
Lee

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