> ----- Original Message ----
> From: Ivan Voras <[EMAIL PROTECTED]>
> To: freebsd-hackers@freebsd.org
> Sent: Tuesday, November 18, 2008 5:21:04 AM
> Subject: Re: NET.ISR and CPU utilization performance w/ HP DL 585 using
> FreeBSD 7.1 Beta2
>
> Won De Erick wrote:
>
> > I compiled the following em driver for Intel NIC Pro (82571) w/ FreeBSD 7.1
> > Beta 2 on HPDL 585 machine having 16CPUs.
> >
> > http://people.yandex-team.ru/~wawa/
> >
> > With net.isr.direct=1, I made some changes on kthreads(default=2) for em0
> > and em1's rx.
> >
> > dev.em.0.rx_kthreads: 6
> > ....
> > dev.em.1.rx_kthreads: 6
> >
> > With these settings, the result is:
> >
> > CPU: 0.0% user, 0.0% nice, 57.2% system, 3.6% interrupt, 39.2% idle
> > Mem: 17M Active, 7228K Inact, 156M Wired, 76K Cache, 21M Buf, 31G Free
> > Swap: 4096M Total, 4096M Free
> >
> > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> > 52 root 1 43 - 0K 16K CPU12 c 41:38 100.00%
> > em0_rx_kthread_1
> > 51 root 1 43 - 0K 16K CPU3 3 41:38 100.00%
> > em0_rx_kthread_0
> > 54 root 1 -68 - 0K 16K CPU2 2 39:39 100.00%
> > em1_txcleaner
> > 1283 root 1 43 - 0K 16K CPU1 1 38:55 100.00%
> > em0_rx_kthread_3
> > 1282 root 1 43 - 0K 16K CPU10 a 38:55 100.00%
> > em0_rx_kthread_2
> > 1344 root 1 43 - 0K 16K CPU9 9 25:51 100.00%
> > em0_rx_kthread_5
> > 1343 root 1 43 - 0K 16K CPU4 4 25:51 100.00%
> > em0_rx_kthread_4
> > 12 root 1 171 ki31 0K 16K CPU14 e 44:28 91.70% idle:
> > cpu14
>
> This is very interesting. Do you see real performance (network
> throughput) increase?
>
There's a little improvement on the throughput, but packet errors occurred on
both interfaces.
# netstat -I em1 -w 1 -d
input (em1) output
packets errs bytes packets errs bytes colls drops
32494 483 23083087 15681 0 23719154 0 82
30547 330 23104447 16062 0 23077442 0 44
# netstat -I em0 -w 1 -d
input (em0) output
packets errs bytes packets errs bytes colls drops
19889 640 24144754 21307 0 8719922 0 0
18071 2436 25966238 21088 0 8766995 0 0
Is there any other thing that I can tweak to solve the problem?
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