[DragonFlyBSD - Bug #1527] (Closed) extremely bad USB/msdos performance

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #1527 has been updated by tuxillo.

Description updated
Status changed from New to Closed

msdos(5) is being kept in sync with FreeBSD. Please reopen this issue if this is still an issue.

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Bug #1527: extremely bad USB/msdos performance
http://bugs.dragonflybsd.org/issues/1527#change-14226

* Author: corecode
* Status: Closed
* Priority: Normal
* Assignee: vsrinivas
* Target version: 6.2
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The performance for writing to msdosfs on an ehci usb device is 
pathetic.  I'm getting ~500KB/sec, while other OS can do at least 6MB.

the rsync process is most of the time in "iowait", "biows", "biord".

vmstat:
  tin tout  KB/t tps   MB/s   KB/t tps   MB/s   KB/t tps   MB/s  us ni 
sy in id
    8  680 60.86   56  3.33   0.00    0  0.00  10.00    2  0.02   3  0 
5  0 93
    7  400 64.00    2  0.12   0.00    0  0.00  16.00    1  0.02   1  0 
5  0 94
   10  415 64.00    2  0.12   0.00    0  0.00   0.00    0  0.00   3  0 
5  0 92
    9  528  0.00    0  0.00   0.00    0  0.00  16.00    2  0.03   2  0 
3  0 95
    9  541 64.00    4  0.25   0.00    0  0.00  16.00   86  1.34   2  0 
6  0 92
   10  399  0.00    0  0.00   0.00    0  0.00  16.00  138  2.16   4  0 
6  0 90
    8  546 64.00    2  0.12   0.00    0  0.00  16.00    4  0.06   7  0 
8  0 85
    7  509 37.75   89  3.28   0.00    0  0.00  15.68   37  0.57   3  0 
8  0 89
   10  545  0.00    0  0.00   0.00    0  0.00  16.00  131  2.05   3  0 
8  0 89
    1  104  4.00    1  0.00   0.00    0  0.00  16.00   40  0.62   5  0 
7  0 87
    2  226 48.00   86  4.03   0.00    0  0.00  14.29    7  0.10   4  0 
6  0 90
  102  100 64.00    2  0.12   0.00    0  0.00  16.00  110  1.72   2  0 
5  0 93
  126  102 64.00    2  0.12   0.00    0  0.00  16.00   37  0.58   3  0 
6  0 91
   72  103 64.00    1  0.06   0.00    0  0.00  13.29  124  1.61   0  0 
4  0 95
   42   98 64.00    1  0.06   0.00    0  0.00   0.00    0  0.00   1  0 
3  0 96
  176  225 45.40   86  3.81   0.00    0  0.00  16.00    2  0.03   4  0 
6  0 90
  136  104 19.43   84  1.59   0.00    0  0.00  16.00   11  0.17   7  0 
8  0 85
   70  121  0.00    0  0.00   0.00    0  0.00  16.00   26  0.41   1  0 
10  0 89
   26  100 64.00    5  0.31   0.00    0  0.00  16.00  140  2.19   2  0 
5  0 93
    2  219 56.79   91  5.05   0.00    0  0.00  15.79   58  0.89   3  0 
6  0 91



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