Messages in this thread | | | From | Shane Nay <> | Subject | Re: Tyan S2466 MPX integrated ethernet interrupt happy | Date | Sat, 23 Mar 2002 05:45:24 -0800 |
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> > So, approximately 8.5 million ethernet interrupts. The system is > > noticably slower when streaming ethernet data, and it's sucking > > up a lot more processing time than on my other much slower other > > box. This box is running a stock 2.4.18 kernel from kernel.org > > (i.e. no custom hacks). It's running 2 1800+ XPs. > > That all looks normal. Could you be more specific about > the performance problems? How much slower? Output from > `top' and `ps'? Any nasty messages in the system log?
No nasties in the syslog. System usage from top averages 50% per CPU. (By system I mean kernel usage, bounces between 70 and 30 per CPU)
> Looking at the ethernet driver won't help, I expect - it's > as efficient as most any other driver. If there is a problem, > it lies elsewhere...
Gotcha, yes that could definetly be. This was extraordinarily unscientific. I was thinking maybe someone had seen something else like this on this platform. So, I'll write a test that isolates ethernet from other stuff like ide performance, etc.
> A kernel profile would be illuminating. Build the kernel with as > few modules as possible, boot the machine with `profile=1' and play > with readprofile.
Will do when I return.
Thanks, Shane Nay. (Someone else noted their /proc/interrupts for the same machine, but my box had only been up for 1.5 hours :) - 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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