From: Patrick McHardy <kaber@trash.net>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: heitzenberger@astaro.com, netfilter-devel@vger.kernel.org,
holger@eitzenberger.org
Subject: Re: [ULOGD RFC 07/30] Renice to -1 on startup
Date: Fri, 01 Feb 2008 08:19:09 +0100 [thread overview]
Message-ID: <47A2C7ED.6060106@trash.net> (raw)
In-Reply-To: <47A2965A.6090504@netfilter.org>
Pablo Neira Ayuso wrote:
> heitzenberger@astaro.com wrote:
>> Thus possibly preventing e.g. ctnetlink from overruns on busy sites.
>
> Also interesting, do you really observe a real improvement? I'll try
> this with conntrackd tomorrow in my testbed.
I noticed huge differences in nfnetlink_queue performance by renicing,
which is a clear indication of insufficient buffer space in the
socker receive queue (in case of nfnetlink_queue actually receive
queue size *or* kernel queue size). The buffers have to be dimensioned
large enough to catch userspace latency fluctuations, so the proper
fix is most likely to simply increase the receive queue size.
Which reminds me, for nfnetlink_queue we should think about providing
a mechanism to automatically size both kernel queue and socket receive
buffers properly or at least measure latencies.
next prev parent reply other threads:[~2008-02-01 7:19 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-30 18:58 [ULOGD RFC 00/30] [ULOGD RFC] ulogd V2 improvements, round #1 heitzenberger
2008-01-30 18:58 ` [ULOGD RFC 01/30] Add NACCT output plugin heitzenberger
2008-01-30 18:58 ` [ULOGD RFC 02/30] common.h: added heitzenberger
2008-01-30 18:58 ` [ULOGD RFC 03/30] Replace timer code by working version heitzenberger
2008-02-01 3:42 ` Pablo Neira Ayuso
2008-02-01 8:15 ` Holger Eitzenberger
2008-02-01 9:25 ` Patrick McHardy
2008-02-01 9:43 ` Holger Eitzenberger
2008-02-01 9:51 ` Patrick McHardy
2008-01-30 18:58 ` [ULOGD RFC 04/30] Add IFI list heitzenberger
2008-01-30 18:58 ` [ULOGD RFC 05/30] Add signalling subsystem heitzenberger
2008-02-01 3:46 ` Pablo Neira Ayuso
2008-02-01 8:18 ` Holger Eitzenberger
2008-02-01 9:17 ` Patrick McHardy
2008-02-01 9:30 ` Holger Eitzenberger
2008-02-01 10:11 ` Holger Eitzenberger
2008-01-30 18:58 ` [ULOGD RFC 06/30] Conffile cleanup, use common pr_debug() heitzenberger
2008-01-30 18:58 ` [ULOGD RFC 07/30] Renice to -1 on startup heitzenberger
2008-02-01 3:47 ` Pablo Neira Ayuso
2008-02-01 7:19 ` Patrick McHardy [this message]
2008-02-01 9:12 ` Holger Eitzenberger
2008-01-30 18:58 ` [ULOGD RFC 08/30] NFCT: rework heitzenberger
2008-02-01 1:23 ` Pablo Neira Ayuso
2008-02-01 8:09 ` Holger Eitzenberger
2008-02-01 9:11 ` Patrick McHardy
2008-02-01 13:37 ` Pablo Neira Ayuso
2008-02-01 16:19 ` Holger Eitzenberger
2008-02-01 16:47 ` Pablo Neira Ayuso
2008-02-01 17:06 ` Holger Eitzenberger
2008-02-02 21:10 ` Pablo Neira Ayuso
2008-02-01 9:10 ` Patrick McHardy
2008-02-01 9:38 ` Patrick McHardy
2008-02-02 16:20 ` [PATCH] " Eric Leblond
2008-02-02 20:07 ` Holger Eitzenberger
2008-01-30 18:58 ` [ULOGD RFC 09/30] Port to ulogd 2.00, mostly a rewrite heitzenberger
2008-01-30 18:58 ` [ULOGD RFC 10/30] Initial round to make plugins reconfigurable heitzenberger
2008-01-30 18:58 ` [ULOGD RFC 11/30] NFCT: make reconfigurable heitzenberger
2008-01-30 19:30 ` NFCT ulogd pluging [was Re: [ULOGD RFC 11/30] NFCT: make reconfigurable] Pablo Neira Ayuso
2008-01-30 19:51 ` Patrick McHardy
2008-01-30 20:39 ` Harald Welte
2008-01-30 21:04 ` Holger Eitzenberger
2008-02-01 1:17 ` Pablo Neira Ayuso
2008-01-30 18:58 ` [ULOGD RFC 12/30] SQLITE3: make reconfigurable heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 13/30] NFCT: add disable switch heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 14/30] SQLITLE3: " heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 15/30] NFCT: add sequence cache heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 16/30] SQLITE3: handle locked DB smarter heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 17/30] NFCT: use localtime for timestamps heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 18/30] NFCT: properly account both directions in all cases heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 19/30] llist: add llist_for_each_prev_safe() heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 20/30] SQLITE3: generalize error handling heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 21/30] Improve select performance heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 22/30] Add set_sockbuf_len() heitzenberger
2008-02-01 3:50 ` Pablo Neira Ayuso
2008-02-01 8:20 ` Holger Eitzenberger
2008-02-01 9:20 ` Patrick McHardy
2008-01-30 18:59 ` [ULOGD RFC 23/30] NFCT: make sequence cache bigger, make handling smarter heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 24/30] NFCT: increase socket buffers heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 25/30] Introduce global state, skip some stacks during reconfiguration heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 26/30] llist: turn poisoning off by default heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 27/30] NFCT: cleanup direction handling heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 28/30] NFCT: fix start/stop handling heitzenberger
2008-01-30 18:59 ` [ULOGD RFC 29/30] NFCT: adapt to new libnetfilter_conntrack heitzenberger
2008-02-01 3:55 ` Pablo Neira Ayuso
2008-02-01 8:33 ` Holger Eitzenberger
2008-01-30 18:59 ` [ULOGD RFC 30/30] SQLITE3: move timer initialization to start handler heitzenberger
2008-01-30 19:18 ` [ULOGD RFC 00/30] [ULOGD RFC] ulogd V2 improvements, round #1 Patrick McHardy
2008-01-30 20:59 ` Holger Eitzenberger
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