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Old 12-02-2011, 02:51 PM
"Russell L. Carter"
 
Default 3w-9xxx performance bug in kernel 3.1.0-amd64

Hi,
I've got a testing amd64 system with two 3Ware 9500S controllers
and performance with the newest kernel is dramatically
slower than with 2.6.32-5-amd64. Also response to tw_cli
and 3dm2 is glacial. Possibly an IRQ issue?

Anyway my question is what list is best to ask about this
problem. Or should I just go ahead and file a bug report
(my first)? Bonnie++ output appended.

Thanks,
Russell

** Linux berlin 2.6.32-5-amd64 #1 SMP Thu Nov 3 03:41:26 UTC 2011 x86_64 GNU/Linux
rcarter@berlin> /usr/sbin/bonnie++ -d /d1/tmp
Writing a byte at a time...done
Writing intelligently...done
Rewriting...done
Reading a byte at a time...done
Reading intelligently...done
start 'em...done...done...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.96 ------Sequential Output------ --Sequential Input- --Random-
Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
berlin 16G 376 98 84523 15 36035 6 1808 97 223527 20 206.4 1
Latency 21484us 230ms 354ms 19199us 65485us 824ms
Version 1.96 ------Sequential Create------ --------Random Create--------
berlin -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 20902 61 +++++ +++ 25927 54 25286 62 +++++ +++ 28831 57
Latency 296us 663us 1672us 177us 30us 52us

1.96,1.96,berlin,1,1322808950,16G,,376,98,84523,15 ,36035,6,1808,97,223527,20,206.4,1,16,,,,,20902,61 ,+++++,+++,25927,54,25286,62,+++++,+++,28831,57,21 484us,230ms,354ms,19199us,65485us,824ms,296us,663u s,1672us,177us,30us,52us
rcarter@berlin>

** Linux berlin 3.1.0-1-amd64 #1 SMP Mon Nov 14 08:02:25 UTC 2011 x86_64
rcarter@berlin> /usr/sbin/bonnie++ -d /d1/tmp
Writing a byte at a time...done
Writing intelligently...done
Rewriting...done
Reading a byte at a time...done
Reading intelligently...done
start 'em...done...done...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.96 ------Sequential Output------ --Sequential Input- --Random-
Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
berlin 16G 495 89 27134 4 1422 0 1443 58 3251 0 77.9 0
Latency 15666us 923ms 1610ms 96817us 459ms 1200ms
Version 1.96 ------Sequential Create------ --------Random Create--------
berlin -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 9623 19 +++++ +++ 19726 33 14990 29 +++++ +++ 19520 26
Latency 40757us 587us 1405us 416us 16us 966us
1.96,1.96,berlin,1,1322795929,16G,,495,89,27134,4, 1422,0,1443,58,3251,0,77.9,0,16,,,,,9623,19,+++++, +++,19726,33,14990,29,+++++,+++,19520,26,15666us,9 23ms,1610ms,96817us,459ms,1200ms,40757us,587us,140 5us,416us,16us,966us
rcarter@berlin>


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