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Date: Thu, 28 Aug 2008 22:55:29 +0300 From: Denys Fedoryshchenko <denys@...p.net.lb> To: Eric Dumazet <dada1@...mosbay.com> Cc: Andi Kleen <andi@...stfloor.org>, Joe Malicki <jmalicki@...acarta.com>, David Miller <davem@...emloft.net>, johnpol@....mipt.ru, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, juhlenko@...mai.com, sammy@...my.net Subject: Re: loaded router, excessive getnstimeofday in oprofile On Thursday 28 August 2008, Eric Dumazet wrote: > OK, please try oprofile with call graph analysis. I did already. Even because most of programs (except ripd/zebra) can be killed, and i kill them, it doesn't change almost anything. it seems heavy things causing instability: 1)HTB (resolution can be lowered to improve performance, i will try Jarek patch soon) 2)ocassionally ping/tcpdump other SO_TIMESTAMP users 3)Probably softlockup detection. Disabled already, i will come back to it soon, if it is required. One of other issues i notice - "CACHE MISS" cause maybe almost 5-10% in oprofile in u32, but i am not sure it is interesting subject to discuss. I have to optimize all my iproute2 rules first. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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