Messages in this thread | | | From | "Jim Roland" <> | Subject | Re: ksoftirqd_CPU0 causing severe latency | Date | Fri, 10 Jan 2003 08:45:23 -0600 |
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How do I profile and collect interrupt info? I have not tried to do this w/o iptables, because iptables is required for this box to do what it does. I'm not a programmer, so looking at eepro100's code will not do me much good. :)
----- Original Message ----- From: "Denis Vlasenko" <vda@port.imtp.ilyichevsk.odessa.ua> To: "Jim Roland" <jroland@roland.net>; <linux-kernel@vger.kernel.org> Sent: Friday, January 10, 2003 3:16 AM Subject: Re: ksoftirqd_CPU0 causing severe latency
> On 10 January 2003 08:41, Jim Roland wrote: > > I am running a RH7.2 router with kernel 2.4.18-19.7.x and upgraded > > from 2.4.18-17 in hopes this would fix the problem, but it hasn't. > > > > The problem I am experiencing is that after a while, the system > > begins to lag badly, and running "ps -ax" writes to a SSH console > > like a terminal running at 14.4kbps. This only seems to have > > occurred after the box started procesing a network load. > > > > The box is a router, with a Supermicro (model=?) motherboard with > > embedded Intel EEpro/100 NICs using the eepro100 module. This box is > > also serving as an iptables filter for the network as well. It's > > processing approximately 60Mbps sustained traffic outbound, and about > > 10-15Mbps traffic inbound. > > That's not a small figure :) > > > The box also lags SEVERLY when I'm trying to use the state matching > > in the kernel (as module), lagging badly when ip_conntrack is loaded. > > > > In contrast, I am running the same OS and kernel versions on another > > box (same modules) and am not having the same problem (it is only > > handling about 5Mbps sustained out, and 1Mbps sustained inbound). > > > > I need HELP! > > Profile your box. (We need to know where it spends most of CPU time). > Send profile data to the list. > > Also collect interrupt rate info. > > You may also look into Intel EEpro/100 driver's interrupt handler code. > > Does is lag that bad without iptables? > -- > vda > - > 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/ >
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