Re: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.25-1

[Ingo Molnar]

* Mark_H_Johnson@xxxxxxxxxxxx <Mark_H_Johnson@xxxxxxxxxxxx> wrote:

>  1209 80000000 0.005ms (+0.000ms): do_nmi (mcount)
>  1209 80000000 0.005ms (+0.000ms): do_nmi (<00200286>)
>  1209 80000000 0.006ms (+0.000ms): profile_hook (profile_tick)
>  1209 80000000 0.006ms (+0.000ms): _raw_read_lock (profile_hook)
>  1209 80000000 0.007ms (+0.196ms): _raw_read_unlock (profile_tick)
>  1209 80000000 0.204ms (+0.001ms): set_new_owner (__down_mutex)

i've seen NMIs causing such problems before. Could you try a testrun
with all debug options disabled in the .config (and REGPARM enabled,
etc.) plus nmi_watchdog=0? Just to see how many of the artifacts are
related to debugging overhead.

	Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/