On Fri, Dec 04, 2015 at 12:13:06PM +0100, Petar Bogdanovic wrote:
>
> I also tried a 5-stream dd test, based on one of your previous mails:
>
> https://mail-index.netbsd.org/netbsd-users/2014/12/01/msg015503.html
>
> All five streams got ~10MB/s each (bs=16k), more or less consistent with
> the bonnie++ output.
>
> I should retry that with priocscan.
~5.5MB/s per stream:
$ for dev in $(sysctl -n hw.disknames); do sudo dkctl $dev strategy priocscan; done
/dev/rcd0d: fcfs -> priocscan
/dev/rwd0d: fcfs -> priocscan
/dev/rwd1d: fcfs -> priocscan
/dev/rraid0d: fcfs -> priocscan
$ date ; for i in 0 1 2 3 4; do dd if=/dev/zero of=test$i bs=16k count=1048576 &done ; wait ; date
Fri Dec 4 12:19:07 CET 2015
[1] 9484
[2] 9716
[3] 6843
[4] 9129
[5] 9250
1048576+0 records in
1048576+0 records out
17179869184 bytes transferred in 3047.215 secs (5637892 bytes/sec)
1048576+0 records in
1048576+0 records out
17179869184 bytes transferred in 3069.532 secs (5596901 bytes/sec)
1048576+0 records in
1048576+0 records out
17179869184 bytes transferred in 3082.440 secs (5573464 bytes/sec)
1048576+0 records in
1048576+0 records out
17179869184 bytes transferred in 3092.244 secs (5555793 bytes/sec)
1048576+0 records in
1048576+0 records out
17179869184 bytes transferred in 3103.526 secs (5535596 bytes/sec)
Fri Dec 4 13:10:50 CET 2015
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