Re: [patch] voluntary-preempt-2.6.8.1-P7

Ingo Molnar
2004-08-22T06:34:44Z

* Lee Revell <rlrevell@joe-job.com> wrote:

> On Sat, 2004-08-21 at 20:06, K.R. Foley wrote:
> > I just posted a similar trace of ~4141 usec from P6 here:
> >
> > http://www.cybsft.com/testresults/2.6.8.1-P6/latency-trace1.txt
> >
>
> This looks wrong:
>
> 00000003 0.008ms (+0.001ms): dummy_socket_sock_rcv_skb (tcp_v4_rcv)
> 00000004 0.008ms (+0.000ms): tcp_v4_do_rcv (tcp_v4_rcv)
> 00000004 0.009ms (+0.000ms): tcp_rcv_established (tcp_v4_do_rcv)
> 00010004 3.998ms (+3.989ms): do_IRQ (tcp_rcv_established)
> 00010005 3.999ms (+0.000ms): mask_and_ack_8259A (do_IRQ)
> 00010005 4.001ms (+0.002ms): generic_redirect_hardirq (do_IRQ)
> 00010004 4.002ms (+0.000ms): generic_handle_IRQ_event (do_IRQ)
>
> Probably a false positive, Ingo would know better. What kind of
> stress testing were you doing?

indeed this looks suspect. Is this an SMP system?

Ingo