lkml.org 
[lkml]   [1999]   [Dec]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch] Re: setitimer lowlatency-2.2.13-A1 questions
On Tue, 7 Dec 1999, William Montgomery wrote:

>This allows me to see the irqdis_nobh in my ktrace, however, I never
>do see it. [..]

That's fine because you must not see it. If you see it it means it should
BUG() or you won't be able to achieve the best latency.

>The following ktrace shows the timer_bh is still not being run
>when it should. Any ideas?
>
>22161.62 5.79 timer_interrupt pid(220)
>22167.41 0.82 do_timer pid(220)
>22168.23 0.80 enable_8259A_irq pid(220)
>22169.04 0.14 do_IRQ pid(220)
>22169.17 0.16 do_bottom_half pid(220)
>22169.33 1.81 do_IRQ pid(220)
>22171.14 0.44 del_timer pid(220)
>22171.58 0.18 __kfree_skb pid(220)
>22171.76 0.26 sock_rfree pid(220)
>22172.03 0.16 kfree_skbmem pid(220)
>22172.19 0.44 kfree pid(220)
>22172.64 1.01 kmem_cache_free pid(220)
>22173.65 2243.54 do_IRQ pid(220)
>24417.19 0.44 system_call pid(220)
>24417.63 0.46 sys_sigsuspend pid(220)
>24418.09 0.66 schedule pid(220)
>24418.75 0.53 do_bottom_half pid(220)
>24419.27 0.77 timer_bh pid(220)

Could you provide also a plain `ktrace -m System.map -s ???`? The hex
addresses (not only the resolved symbols) and CPU information are very
interesting.

Thanks.

Andrea


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

\
 
 \ /
  Last update: 2005-03-22 13:55    [from the cache]
©2003-2011 Jasper Spaans