Oh, btw, this make improvements only on 7.0-Release and Stable using ULE
scheduler.
- Using 4BSD Scheduler will improve disk access speed but no cpu usage.
- On FreeBSD 6.2 and 6.3 this make no difference on cpu usage/speed
(about 60mb/sec maximum using 100% cpu).
Thanks,
Daniel
Daniel Ponticello ha scritto:
Much better:
endevor# camcontrol negotiate 0:0 -W 16 -O 127 -R 40.000
Current Parameters:
(pass0:mpt0:0:0:0): sync parameter: 8
(pass0:mpt0:0:0:0): frequency: 160.000MHz
(pass0:mpt0:0:0:0): offset: 127
(pass0:mpt0:0:0:0): bus width: 16 bits
(pass0:mpt0:0:0:0): disconnection is enabled
(pass0:mpt0:0:0:0): tagged queueing is enabled
endevor# camcontrol inquiry da0
pass0: <VMware Virtual disk 1.0> Fixed Direct Access SCSI-2 device
pass0: 80.000MB/s transfers (40.000MHz, offset 127, 16bit), Command
Queueing Enabled
endevor# dd if=/dev/zero of=/var/tmp/dead.file bs=1024k count=1000
1000+0 records in
1000+0 records out
1048576000 bytes transferred in 20.364577 secs (51490193 bytes/sec)
endevor# dd if=/dev/zero of=/var/tmp/dead.file bs=1024k count=1000
1000+0 records in
1000+0 records out
1048576000 bytes transferred in 11.525560 secs (90978311 bytes/sec)
endevor# dd if=/dev/zero of=/var/tmp/dead.file bs=1024k count=1000
1000+0 records in
1000+0 records out
1048576000 bytes transferred in 11.833996 secs (88607094 bytes/sec)
endevor# dd if=/dev/zero of=/var/tmp/dead.file bs=1024k count=1000
1000+0 records in
1000+0 records out
1048576000 bytes transferred in 12.779979 secs (82048335 bytes/sec)
endevor# dd if=/dev/zero of=/var/tmp/dead.file bs=1024k count=1000
1000+0 records in
1000+0 records out
1048576000 bytes transferred in 11.812926 secs (88765137 bytes/sec)
Also CPU system load is lower: 40% instead of 70% on dual cpu, and 23%
instead of 50% on quad cpu.
Still not as fast as debian, but really really usable now =)
how i can make it mantain these settings at boot?
Also, do you know why the first dd was slower?
Thanks,
Daniel
Shunsuke SHINOMIYA ha scritto:
Hello, Daniel
Can you execute camcontrol with some parameters again?
For example, `camcontrol negotiate 0:0 -W 16 -O 127 -R 40.000'.
--
WBR,
Cordiali Saluti,
Daniel Ponticello, VP of Engineering
Network Coordination Centre of Skytek
---
- For further information about our services:
- Please visit our website at http://www.Skytek.it
---
_______________________________________________
freebsd-stable@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
