From: David Miller <davem@davemloft.net>
To: kuznet@ms2.inr.ac.ru
Cc: ak@suse.de, master@sectorb.msk.ru, hawk@diku.dk,
harry@atmos.washington.edu, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: Network performance degradation from 2.6.11.12 to 2.6.16.20
Date: Mon, 18 Sep 2006 14:22:47 -0700 (PDT) [thread overview]
Message-ID: <20060918.142247.14844785.davem@davemloft.net> (raw)
In-Reply-To: <20060918210321.GA4780@ms2.inr.ac.ru>
From: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Date: Tue, 19 Sep 2006 01:03:21 +0400
> 1. It even does not disable possibility to record timestamp inside
> driver, which Alan was afraid of. The sequence is:
>
> if (!skb->tstamp.off_sec)
> net_timestamp(skb);
>
> 2. Maybe, netif_rx() should continue to get timestamp in netif_rx().
>
> 3. NAPI already introduced almost the same inaccuracy. And it is really
> silly to waste time getting timestamp in netif_receive_skb() a few
> moments before the packet is delivered to a socket.
>
> 4. ...but clock source, which takes one of top lines in profiles
> must be repaired yet. :-)
Ok, ok, but don't we have queueing disciplines that need the timestamp
even on ingress?
next prev parent reply other threads:[~2006-09-18 21:23 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-16 16:01 Network performance degradation from 2.6.11.12 to 2.6.16.20 Harry Edmon
2006-06-17 22:35 ` Andrew Morton
2006-06-17 23:23 ` Harry Edmon
2006-06-17 23:56 ` Andrew Morton
2006-06-18 3:16 ` Stephen Hemminger
2006-06-18 23:23 ` Harry Edmon
2006-06-19 13:54 ` Harry Edmon
2006-06-20 2:11 ` Herbert Xu
2006-06-19 14:47 ` Jesper Dangaard Brouer
2006-06-19 15:24 ` Andi Kleen
2006-06-19 17:34 ` Chris Friesen
2006-06-19 20:39 ` Andi Kleen
2006-06-19 18:24 ` Jesper Dangaard Brouer
2006-06-25 21:51 ` Harry Edmon
2006-06-26 4:20 ` Bill Fink
2006-06-25 22:22 ` Willy Tarreau
2006-06-26 5:23 ` Andi Kleen
2006-07-04 11:41 ` Jesper Dangaard Brouer
2006-07-04 11:54 ` Andi Kleen
2006-07-10 10:55 ` Jesper Dangaard Brouer
2006-09-16 12:08 ` Vladimir B. Savkin
2006-09-18 8:35 ` Andi Kleen
2006-09-18 9:03 ` Vladimir B. Savkin
2006-09-18 9:58 ` Andi Kleen
2006-09-18 10:29 ` Vladimir B. Savkin
2006-09-18 11:27 ` Andi Kleen
2006-09-18 15:38 ` Alexey Kuznetsov
2006-09-18 15:54 ` Andi Kleen
2006-09-18 16:28 ` Alexey Kuznetsov
2006-09-18 16:50 ` Andi Kleen
2006-09-18 21:03 ` Alexey Kuznetsov
2006-09-18 21:22 ` David Miller [this message]
2006-09-18 21:46 ` Alexey Kuznetsov
2006-09-19 5:55 ` Andi Kleen
2006-09-19 20:31 ` Thomas Graf
2006-09-19 20:43 ` Andi Kleen
2006-09-19 5:52 ` Andi Kleen
2006-09-18 21:18 ` Vladimir B. Savkin
2006-09-18 22:00 ` Alexey Kuznetsov
2006-09-18 21:57 ` David Lang
2006-09-19 19:40 ` David Miller
2006-09-19 19:44 ` Stephen Hemminger
2006-09-18 22:03 ` Vladimir B. Savkin
2006-09-19 19:41 ` David Miller
2006-09-19 19:47 ` David Miller
2006-09-22 15:35 ` Alexey Kuznetsov
2006-09-22 15:43 ` Andi Kleen
2006-09-22 16:51 ` Rick Jones
2007-03-06 13:25 ` Packet timestamps (was: Re: Network performance degradation from 2.6.11.12 to 2.6.16.20) Vladimir B. Savkin
2007-03-06 14:38 ` Eric Dumazet
2007-03-06 14:43 ` Vladimir B. Savkin
2007-03-06 15:16 ` Eric Dumazet
2007-03-06 18:15 ` Vladimir B. Savkin
2006-09-18 21:08 ` Network performance degradation from 2.6.11.12 to 2.6.16.20 Vladimir B. Savkin
2006-09-18 14:09 ` David Miller
2006-09-18 14:29 ` Andi Kleen
2006-09-18 15:19 ` Alan Cox
2006-09-18 15:19 ` Andi Kleen
2006-06-19 16:40 ` Harry Edmon
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