Date: Mon, 13 Nov 2006 17:22:20 -0500 From: Mike Tancsa <mike@sentex.net> To: Ivan Voras <ivoras@fer.hr>, freebsd-stable@freebsd.org Cc: freebsd-net@freebsd.org Subject: Re: Proposed 6.2 em RELEASE patch Message-ID: <200611132222.kADMM8er046074@lava.sentex.ca> In-Reply-To: <ejab8p$tgp$1@sea.gmane.org> References: <2a41acea0611081719h31be096eu614d2f2325aff511@mail.gmail.com> <200611091536.kA9FaltD018819@lava.sentex.ca> <45534E76.6020906@samsco.org> <200611092200.kA9M0q1E020473@lava.sentex.ca> <200611102004.kAAK4iO9027778@lava.sentex.ca> <2a41acea0611101400w5b8cef40ob84ed6de181f3e2c@mail.gmail.com> <200611102221.kAAML6ol028630@lava.sentex.ca> <455570D8.6070000@samsco.org> <200611120412.kAC4CuIB035746@lava.sentex.ca> <45574ECA.4080207@samsco.org> <200611130040.kAD0etbp040637@lava.sentex.ca> <4557CECD.2000609@samsco.org> <200611130158.kAD1wdKE040908@lava.sentex.ca> <4557EF13.9060305@samsco.org> <200611130454.kAD4sZwe041556@lava.sentex.ca> <4557FF7A.8020704@samsco.org> <200611131248.kADCmieP043730@lava.sentex.ca> <ejab8p$tgp$1@sea.gmane.org>
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At 12:50 PM 11/13/2006, Ivan Voras wrote:
>Mike Tancsa wrote:
> > At 12:15 AM 11/13/2006, Scott Long wrote:
> >
> >> Is this with EM_INTR_FAST enabled also?
> >
> > Yes. Havent done the stock case yet, but will do so later today.
>
>Do you have a comparison with Linux under the same circumstances?
I had a disk with 64bit already installed. I will try with 32bit
tomorrow. I can also try FreeBSD AMD64 on the box to see how it does.
ifstat gives a bit of an odd output, but its the same sort of pattern
where adding a second stream in the same direction, slows down the
first one. On the box R2
[root@amd64 ifstat-1.1]# ifstat -b
eth0 eth1 eth3 eth4
Kbps in Kbps out Kbps in Kbps out Kbps in Kbps out Kbps in Kbps out
0.00 0.00 0.00 0.00 0.00 0.00 4.89 3.74
0.00 0.00 0.00 0.00 0.00 0.00 0.50 1.45
0.00 0.00 0.00 0.00 0.00 0.00 1.00 1.45
160965.0 0.00 0.00 0.00 0.00 0.00 0.83 1.95
0.00 0.00 0.00 272056.4 0.00 0.00 1.00 1.45
393994.2 0.00 0.00 0.00 0.00 0.00 5.47 1.45
0.00 0.00 0.00 393543.7 0.00 0.00 4.25 1.45
392911.0 0.00 0.00 0.00 0.00 0.00 2.50 1.45
0.00 0.00 0.50 392756.4 0.00 0.00 1.25 1.45
392626.7 0.00 0.00 0.00 0.00 0.00 1.75 1.45
0.00 0.00 0.00 393233.9 0.00 0.00 6.44 1.45
424068.1 0.00 0.00 0.00 0.00 0.00 1.74
1.45**
0.00 0.00 0.00 460503.1 0.00 0.00 2.72 1.45
509218.1 0.00 0.00 0.00 0.00 0.00 0.99 1.45
0.00 0.00 0.00 507800.4 0.00 0.00 0.50 1.45
502649.5 0.00 0.00 0.00 0.00 0.00 1.00 1.45
0.00 0.00 0.50 507537.1 0.00 0.00 0.50 1.46
519717.9 0.00 0.00 0.00 0.00 0.00 1.00 1.45
0.00 0.00 0.00 525973.4 0.00 0.00 0.50 1.46
520609.0 0.00 0.00 0.00 0.00 0.00 1.00 1.45
0.00 0.00 0.00 517888.6 0.00 0.00 0.50 1.45
525957.3 0.00 0.00 0.00 0.00 0.00 1.00 1.46
0.00 0.00 0.00 524119.9 0.00 0.00 0.50 1.45
522671.1 0.00 0.00 0.00 0.00 0.00 0.99 1.44
0.00 0.00 0.00 494008.7 0.00 0.00 0.50 1.45
390666.3 0.00 0.00 0.00 0.00 0.00 1.00 1.45
0.00 0.00 0.00 273779.6 0.00 0.00 0.50 1.45
0.00 0.00 0.00 0.00 0.00 0.00 1.00 1.45
0.00 0.00 0.00 0.00 0.00 0.00 0.50 1.45
[root@amd64 ifstat-1.1]#
I added the second stream, going in the same direction at **
On one of the targets running netreceive you can see the impact.
[tyan-1u]# ifstat -b
rl0 bge0
Kbps in Kbps out Kbps in Kbps out
0.94 1.42 182716.2 0.00
0.47 1.05 182299.5 0.00
0.94 1.05 182493.4 0.33
0.94 2.09 182588.7 0.00
0.94 1.05 181959.8 0.00
0.47 1.05 104949.7 0.00
0.94 1.05 95674.27 0.00
0.47 1.05 95930.79 0.00
0.94 1.05 98329.93 0.00
0.94 1.05 97940.21 0.00
0.94 1.05 100636.9 0.00
0.47 1.05 99879.34 0.00
^C
[tyan-1u]#
When the packets are bi-directional, the impact is not as great in
LINUX as it is on FreeBSD
[root@amd64 ifstat-1.1]# ifstat -b
eth0 eth1 eth3 eth4
Kbps in Kbps out Kbps in Kbps out Kbps in Kbps out Kbps in Kbps out
0.00 0.00 0.00 0.00 0.00 0.00 3.65 10.81
0.00 0.00 0.00 0.00 0.00 0.00 0.50 1.45
0.00 0.00 0.00 0.00 0.00 0.00 0.83 1.95
0.00 0.00 0.00 0.00 0.00 0.00 1.50 8.03
0.00 0.00 0.00 0.00 0.00 0.00 0.50 1.45
0.00 0.00 0.00 0.00 0.00 0.00 1.00 1.45
0.00 230009.2 0.00 0.00 0.00 0.00 2.83 51.22
0.00 0.00 334969.3 0.00 0.00 0.00 1.00 1.45
0.00 369184.5 0.00 0.00 0.00 0.00 0.50 1.45
0.00 0.00 369294.2 0.00 0.00 0.00 3.33 51.10
0.00 367348.7 0.00 0.00 0.00 0.00 0.50 1.45
0.00 0.00 367185.5 0.00 0.00 0.00 1.00 1.45
2541.17 368707.6 0.00 0.00 0.00 0.00 2.82 51.12
0.00 0.00 363265.6 95798.38 0.00 0.00 0.99 1.44
330239.4 357706.3 0.00 0.00 0.00 0.00 0.50 1.45
0.00 0.00 354181.1 326599.7 0.00 0.00 4.11 51.17
328691.7 356129.1 0.00 0.00 0.00 0.00 0.50 1.44
0.00 0.00 358321.6 330567.1 0.00 0.00 1.50 1.45
329516.7 342389.2 0.00 0.00 0.00 0.00 0.99 14.99
0.00 0.00 334539.9 330647.5 0.00 0.00 0.99 1.44
330982.0 326772.6 0.00 0.00 0.00 0.00 0.50 1.44
0.00 0.00 329472.7 333109.3 0.00 0.00 2.32 14.45
324457.4 327537.4 0.00 0.00 0.00 0.00 0.50 1.44
0.00 0.00 329367.2 317784.0 0.00 0.00 0.99 1.44
308120.8 333789.8 0.00 0.00 0.00 0.00 1.80 20.78
0.00 0.00 331200.2 316116.3 0.00 0.00 1.00 1.45
370504.6 88001.99 0.00 0.00 0.00 0.00 0.50 1.44
0.00 0.00 0.50 392417.6 0.00 0.00 2.82 21.76
394057.2 0.00 0.00 0.00 0.00 0.00 0.83 1.95
0.00 0.00 0.00 394048.2 0.00 0.00 1.00 1.45
394306.3 0.00 0.00 0.00 0.00 0.00 3.66 52.56
0.00 0.00 0.00 393960.8 0.00 0.00 1.00 1.45
373321.8 0.00 0.00 0.00 0.00 0.00 0.50 1.45
0.00 0.00 0.00 261093.7 0.00 0.00 2.33 9.66
0.00 0.00 0.00 0.00 0.00 0.00 0.50 1.45
0.00 0.00 0.00 0.00 0.00 0.00 0.50 1.45
The box is totally responsive throughout with no packet loss on the
management interface.... However, it seems quite a bit slower than
FreeBSD when its tweaked with ADAPTIVE_GIANT removed... But again,
this is 64bit so not quite apples to apples yet. Also, I need to
check the default driver config to see if their NAPI or whatever its
called is enabled. More tests to come.
---Mike
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