[Bug 546649] Re: Slow throughput when communicating with windows

[Michael Casadevall]

Speed seems extremely good with test kernel to the point that NFS root
gets acceptable performance (I've tried it before and never had usable
performance out of it).

I ran bonnie++ as a stress test over NFS, no errors in dmesg that I can
see:

mcasadevall at dusk:~$ bonnie++
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
dusk             1G   215  97  7584   5  5137   8   574 100 11709   8 564.4  63
Latency             40163us    8138ms    7328ms   41249us     310ms     153ms
Version  1.96       ------Sequential Create------ --------Random Create--------
dusk                -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16   293  18  1469  33   492  37   270  19  2211  10   397  30
Latency               407ms     109ms   90387us   80360us    2311us     255ms
1.96,1.96,dusk,1,1270685767,1G,,215,97,7584,5,5137,8,574,100,11709,8,564.4,63,16,,,,,293,18,1469,33,492,37,270,19,2211,10,397,30,40163us,8138ms,7328ms,41249us,310ms,153ms,407ms,109ms,90387us,80360us,2311us,255ms

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Slow throughput when communicating with windows
https://bugs.launchpad.net/bugs/546649
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