Messages in this thread | | | Subject | Re: [patch] voluntary-preempt-2.6.8.1-P8 | From | Lee Revell <> | Date | Tue, 24 Aug 2004 13:17:40 -0400 |
| |
On Tue, 2004-08-24 at 09:48, K.R. Foley wrote: > Lee Revell wrote: > > On Tue, 2004-08-24 at 01:41, Ingo Molnar wrote: > > > >>* Lee Revell <rlrevell@joe-job.com> wrote: > >> > >> > >>>> - reduce netdev_max_backlog to 8 (Mark H Johnson) > >>> > >>>On my system this setting has absolutely no effect on the skb related > >>>latencies. [...] > >> > >>it has an effect on input queue length. Output queue lengths can be > >>reduced via 'ifconfig eth0 txqueuelen 8'. > >> > > > > > > OK. With both of these set to 4, the largest latency I was able to > > generate by ping flooding was 253 usecs. > > > > Even with both of these set to 4, I still get similar results ~647 usec :( >
I am able to generate a 1012 usec latency by flood pinging the broadcast address. These are pretty pathological cases, but if we are going for bounded latency it seems like they should be addressed.
Lee
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |