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SubjectRe: [patch] voluntary-preempt-2.6.9-rc2-mm4-S7
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On Sun, 2004-10-03 at 02:37, Lee Revell wrote:
> On Mon, 2004-09-27 at 20:05, Ingo Molnar wrote:
> > i've released the -S7 VP patch:
> >
> > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc2-mm4-S7
> >
>
> This one was caused by amlat:

And here's another produced by "lsof /foo":

preemption latency trace v1.0.7 on 2.6.9-rc2-mm4-VP-S7
-------------------------------------------------------
latency: 399 us, entries: 608 (608) | [VP:1 KP:1 SP:1 HP:1 #CPUS:1]
-----------------
| task: lsof/4347, uid:0 nice:0 policy:0 rt_prio:0
-----------------
=> started at: unix_seq_start+0x10/0x50
=> ended at: rtc_interrupt+0x294/0x450
=======>
00000001 0.000ms (+0.000ms): unix_seq_start (seq_read)
00000001 0.000ms (+0.039ms): unix_seq_idx (unix_seq_start)
00000001 0.040ms (+0.000ms): unix_seq_show (seq_read)
00000002 0.040ms (+0.001ms): sock_i_ino (unix_seq_show)
00000002 0.041ms (+0.000ms): seq_printf (unix_seq_show)
00000002 0.042ms (+0.002ms): vsnprintf (seq_printf)
00000002 0.045ms (+0.003ms): number (vsnprintf)
00000002 0.048ms (+0.000ms): skip_atoi (vsnprintf)
00000002 0.049ms (+0.001ms): number (vsnprintf)
00000002 0.050ms (+0.000ms): skip_atoi (vsnprintf)
00000002 0.051ms (+0.000ms): number (vsnprintf)
00000002 0.052ms (+0.000ms): skip_atoi (vsnprintf)
00000002 0.052ms (+0.000ms): number (vsnprintf)
00000002 0.053ms (+0.000ms): skip_atoi (vsnprintf)
00000002 0.053ms (+0.000ms): number (vsnprintf)
00000002 0.054ms (+0.000ms): skip_atoi (vsnprintf)
00000002 0.055ms (+0.000ms): number (vsnprintf)
00000002 0.056ms (+0.000ms): skip_atoi (vsnprintf)
00000002 0.056ms (+0.001ms): number (vsnprintf)
00000002 0.058ms (+0.000ms): seq_putc (unix_seq_show)
00000002 0.059ms (+0.000ms): seq_putc (unix_seq_show)
00000002 0.059ms (+0.000ms): seq_putc (unix_seq_show)
00000002 0.059ms (+0.000ms): seq_putc (unix_seq_show)
00000002 0.060ms (+0.000ms): seq_putc (unix_seq_show)
00000002 0.060ms (+0.000ms): seq_putc (unix_seq_show)
...

Full trace:

http://krustophenia.net/testresults.php?dataset=2.6.9-rc2-mm4-S7#/var/www/2.6.9-rc2-mm4-S7/lsof-latency-trace.txt

Lee



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