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Date:      Sat, 20 Sep 2008 13:53:08 +0400
From:      Michael Monashev <softsearch@gmail.com>
To:        freebsd-fs@FreeBSD.org
Cc:        Pawel Jakub Dawidek <pjd@FreeBSD.org>
Subject:   Re: gmirror performance patch
Message-ID:  <1441440775.20080920135308@gmail.com>
In-Reply-To: <946072909.20080917204322@gmail.com>
References:  <946072909.20080917204322@gmail.com>

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Hi.

MM> Patch for improve gmirror performance:
MM> http://www.freebsd.org/cgi/query-pr.cgi?pr=113885

before:
>gstat -I5s
dT: 5.384s  w: 5.000s
 L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w   %busy Name
   12    118    117   1372  349.0      1     12  383.6  100.0| ad4
    4    117    116   1349  297.5      1     12   30.7   99.8| ad6
   38    131    130   1323  459.9      1      9  415.0  100.0| ad8
   62    126    125   1418  534.5      1      9  291.9   98.9| ad10
   34    131    129   1403  639.0      2    128  783.4  100.1| ad12
   47    131    129   1525  747.4      2    128 1044.4  100.1| ad14

after patch:
>gstat -I5s
dT: 5.001s  w: 5.000s
 L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w   %busy Name
   40     93     92   1072  101.4      1     54   20.7   79.3| ad4
    8    114    113   1645  285.0      1     54   87.7   95.8| ad6
    6     52     45    451   23.8      7    312   19.0   44.3| ad8
   85    143    136   1753 1428.8      7    312  556.6  100.2| ad10
   28     91     91    707  217.0      0      0    0.1   79.1| ad12
  100    129    128   1488  894.8      0      0  956.9  100.0| ad14

>gstat -I5s
dT: 5.001s  w: 5.000s
 L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w   %busy Name
   10     84     83   1239   86.1      1     10  123.1   65.6| ad4
   34    121    120   1698  254.2      1     10  215.8   97.3| ad6
   50    132    132   1841  481.3      0      0    0.0   99.9| ad8
    0     63     63    685   46.3      0      0    0.0   57.0| ad10
   70    131    131   2124  532.5      0      0  166.7  100.0| ad12
    0     92     91    893   69.1      1      0   49.6   80.4| ad14
  

--
Michael




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