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Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q5
From: Thomas Charbonnel <thomas@undata.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Lee Revell <rlrevell@joe-job.com>, Daniel Schmitt <pnambic@unu.nu>,
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Date: Mon, 30 Aug 2004 16:25:39 +0200
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Ingo Molnar wrote :
> i've uploaded -Q5 to:
> 
>   http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc1-bk4-Q5
> 

Here are the problematic spots for me with Q5:

rtl8139_poll (this one was also present with previous versions of the
patch) :
http://www.undata.org/~thomas/q5_rtl8139.trace

use_module (modprobe) :
preemption latency trace v1.0.2
-------------------------------
 latency: 154 us, entries: 4 (4)
    -----------------
    | task: modprobe/8172, uid:0 nice:0 policy:0 rt_prio:0
    -----------------
 => started at: resolve_symbol+0x21/0xa0
 => ended at:   resolve_symbol+0x57/0xa0
=======>
00000001 0.000ms (+0.000ms): resolve_symbol (simplify_symbols)
00000001 0.000ms (+0.000ms): __find_symbol (resolve_symbol)
00000001 0.154ms (+0.154ms): use_module (resolve_symbol)
00000001 0.154ms (+0.000ms): sub_preempt_count (resolve_symbol)

and a weird one with do_timer (called from do_IRQ) taking more than 1ms
to complete :
http://www.undata.org/~thomas/do_irq.trace

Thomas