Date: Thu, 02 Feb 2012 00:45:24 +0400 From: Andrey Zonov <andrey@zonov.org> To: freebsd-net@freebsd.org Subject: netisr defered - active only one thread Message-ID: <4F29A464.3080302@zonov.org>
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Hi,
I'm trying to tune machine with 8.2-STABLE for heavy network load and
now playing with netisr. Could anyone explain me why actually works
only one netisr thread if I set them to 8?
loader.conf:
net.isr.maxthreads=8
net.isr.bindthreads=0 (also tried set to 1)
hw.em.rxd=4096
(net.isr.numthreads is 8 after reboot, `procstat -t 12' shows me 8
netisr threads)
sysctl.conf:
net.isr.direct=0
net.isr.direct_force=0 (also tried hybrid mode when direct=1, but
force_direct=0)
NIC:
em0@pci0:4:0:0: class=0x020000 card=0x109615d9 chip=0x10968086 rev=0x01
hdr=0x00
vendor = 'Intel Corporation'
device = 'Intel PRO/1000 EB (Intel PRO/1000 EB)'
class = network
subclass = ethernet
No polling.
top:
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
12 root -44 - 0K 512K CPU7 7 1:18 100.00%
{swi1: netisr 7}
11 root 171 ki31 0K 128K CPU3 3 2:15 94.38%
{idle: cpu3}
11 root 171 ki31 0K 128K CPU6 6 2:06 90.19%
{idle: cpu6}
11 root 171 ki31 0K 128K CPU2 2 2:42 88.67%
{idle: cpu2}
11 root 171 ki31 0K 128K CPU1 1 2:22 84.18%
{idle: cpu1}
11 root 171 ki31 0K 128K CPU5 5 2:29 75.29%
{idle: cpu5}
11 root 171 ki31 0K 128K RUN 4 2:28 69.97%
{idle: cpu4}
11 root 171 ki31 0K 128K RUN 0 2:29 69.68%
{idle: cpu0}
--
Andrey Zonov
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