Messages in this thread | | | From | Martin Honermeyer <> | Subject | Re: [Fwd: Re: 3w-9xxx status in kernel] | Date | Wed, 19 Apr 2006 14:04:19 +0200 |
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Arjan van de Ven wrote:
> -------- Forwarded Message -------- >> From: Martin Honermeyer <maze@strahlungsfrei.de> >> To: linux-kernel@vger.kernel.org >> Subject: Re: 3w-9xxx status in kernel >> Date: Wed, 19 Apr 2006 13:02:42 +0200 >> >> Hi, >> >> same problem over here. Why does the newest kernel contain an old version >> of the 3w-9xxx driver? > > because nobody bothered to submit it??
Okay, now I know how it works.
> >> >> We are having performance problems using a 9550SX controller. Read >> throughput (measured with hdparm) > > hdparm is not a good measurement tool at all for performance. > At least use something like tiobench (tiobench.sf.net)
Thanks for the hint. Here is tiobench output:
$ tiobench No size specified, using 2000 MB Run #1: /usr/bin/tiotest -t 8 -f 250 -r 500 -b 4096 -d . -TTT
Unit information ================ File size = megabytes Blk Size = bytes Rate = megabytes per second CPU% = percentage of CPU used during the test Latency = milliseconds Lat% = percent of requests that took longer than X seconds CPU Eff = Rate divided by CPU% - throughput per cpu load
Sequential Reads File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.6.15-19-amd64-xeon 2000 4096 1 46.63 7.159% 0.083 484.49 0.00000 0.00000 651 2.6.15-19-amd64-xeon 2000 4096 2 34.65 10.11% 0.223 386.04 0.00000 0.00000 343 2.6.15-19-amd64-xeon 2000 4096 4 15.14 8.629% 1.016 1128.07 0.00000 0.00000 175 2.6.15-19-amd64-xeon 2000 4096 8 23.56 23.09% 1.209 2051.28 0.00020 0.00000 102
Random Reads File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.6.15-19-amd64-xeon 2000 4096 1 3.76 0.626% 1.037 99.77 0.00000 0.00000 601 2.6.15-19-amd64-xeon 2000 4096 2 4.88 1.654% 1.545 97.82 0.00000 0.00000 295 2.6.15-19-amd64-xeon 2000 4096 4 5.40 3.389% 2.673 208.84 0.00000 0.00000 159 2.6.15-19-amd64-xeon 2000 4096 8 6.51 11.20% 4.013 261.38 0.00000 0.00000 58
Sequential Writes File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.6.15-19-amd64-xeon 2000 4096 1 13.05 6.946% 0.274 34488.77 0.00098 0.00039 188 2.6.15-19-amd64-xeon 2000 4096 2 6.99 14.91% 0.432 57601.25 0.00352 0.00039 47 2.6.15-19-amd64-xeon 2000 4096 4 7.10 53.92% 1.360 69873.41 0.00957 0.00176 13 2.6.15-19-amd64-xeon 2000 4096 8 7.07 78.44% 2.813 71698.67 0.02441 0.00684 9
Random Writes File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.6.15-19-amd64-xeon 2000 4096 1 0.44 0.142% 0.010 11.50 0.00000 0.00000 306 2.6.15-19-amd64-xeon 2000 4096 2 0.43 0.324% 0.009 0.07 0.00000 0.00000 131 2.6.15-19-amd64-xeon 2000 4096 4 0.42 1.979% 0.031 0.50 0.00000 0.00000 21 2.6.15-19-amd64-xeon 2000 4096 8 0.41 4.640% 0.077 1.33 0.00000 0.00000 9
I am especially scared of the high CPU usage in sequential writes! Btw: this server sits idle at the moment. Just some webserver processes running!
Specs: Dual-Xeon 3 GHz, Ubuntu Dapper 64bit with 2.6.15 Ubuntu kernel.
Martin
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