[prev in list] [next in list] [prev in thread] [next in thread]
List: linux-kernel
Subject: Re: [patch] voluntary-preempt-2.6.8.1-P4
From: Ingo Molnar <mingo () elte ! hu>
Date: 2004-08-20 10:27:32
Message-ID: 20040820102732.GA14622 () elte ! hu
[Download RAW message or body]
* Lee Revell <rlrevell@joe-job.com> wrote:
> This is an extreme load situation, so I don't think it will be a
> real-world problem. I have not seen it under any normal workload.
well, 9 msecs is still not nice. I've been able to trigger larger than
10msec latencies too on a 2 GHz box.
> What about this one:
>
> http://krustophenia.net/testresults.php?dataset=2.6.8.1-P4#/var/www/2.6.8.1-P4/netif_receive_skb_latency_trace.txt
>
> This appears during normal use.
hm, tcp_collapse() in net/ipv4/tcp_input.c. Could you try to just return
from that function? Collapsing skbs of a given socket is not a
necessary functionality (it is only a 'nice' thing to have in OOM
situations) and it indeed can introduce quite high latencies.
Ingo
-
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/
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic