DragonFlyBSD

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