linux-kernel - Re: loaded router, excessive getnstimeofday in oprofile

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080826201406.GA24827@2ka.mipt.ru>
Date:	Wed, 27 Aug 2008 00:14:07 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Denys Fedoryshchenko <denys@...p.net.lb>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: loaded router, excessive getnstimeofday in oprofile

On Fri, Aug 22, 2008 at 04:57:40AM +0300, Denys Fedoryshchenko (denys@...p.net.lb) wrote:
> I have loaded router (~650 Mbps In+Out), based on 2xAMD Opteron 248, Sun Fire 
> X4100. HPET timer available (TSC seems not available on this platform).
> Network interfaces is onboard, connected over PCI-X.
> 
> Right now i am using only one processor, cause using only one interface and 
> interrupts stick to it. Other is almost not used.
> At peak time i notice in mpstat, that this processor is almost "dead", and if 
> i run minor application consuming resources - ping over this router will be 
> terrible. For me it is clear - system overloaded. I did oprofile, and here is 
> result (at low load time, but at peak time it is very similar).

Do you have any packet sockets in this system? Like running dhcp daemon?

-- 
	Evgeniy Polyakov
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/