Measuring RAID-0 CPU load
I need to quantify the additional CPU load that RAID-0 adds (vs. the boost in I/O performance). I don't need to do anything fancy; 'dd if=/dev/zero of=/dev/md?" should do the trick, but I'm not sure how to track the processor utilization during the run.
Any ideas?
Thanks!
Signature · 3 lines
======================================================================== Ian Pilcher [email protected] ========================================================================
Quoted 6 lines · Ian Pilcher
I need to quantify the additional CPU load that RAID-0 adds (vs. the boost in I/O performance). I don't need to do anything fancy; 'dd if=/dev/zero of=/dev/md?" should do the trick, but I'm not sure how to track the processor utilization during the run.
Any ideas?
top not good?
Signature · 7 lines
Måns Rullgård [email protected] - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
Quoted 8 lines · Måns Rullgård
Quoted 5 lines · Ian Pilcher
I need to quantify the additional CPU load that RAID-0 adds (vs. the boost in I/O performance). I don't need to do anything fancy; 'dd if=/dev/zero of=/dev/md?" should do the trick, but I'm not sure how to track the processor utilization during the run.
Quoted 5 lines
Quoted 1 line
Any ideas?
top not good?
I'm hoping for something that can report the avergage load during the entire run. I don't want to sit there and watch it.
From a brief look a the man page, top doesn't seem to do this.
Signature · 8 lines
======================================================================== Ian Pilcher [email protected] ======================================================================== - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
man sar
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Ian Pilcher
Sent: Monday, March 08, 2004 12:24 PM
To: [email protected]
Subject: Re: Measuring RAID-0 CPU load
Quoted 8 lines · Måns Rullgård
Quoted 5 lines · Ian Pilcher
I need to quantify the additional CPU load that RAID-0 adds (vs. the boost in I/O performance). I don't need to do anything fancy; 'dd if=/dev/zero of=/dev/md?" should do the trick, but I'm not sure how to track the processor utilization during the run.
Quoted 5 lines
Quoted 1 line
Any ideas?
top not good?
I'm hoping for something that can report the avergage load during the entire run. I don't want to sit there and watch it.
From a brief look a the man page, top doesn't seem to do this.
Signature · 14 lines
======================================================================== Ian Pilcher [email protected] ======================================================================== - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
Quoted 1 line · Guy
man sar
Perfect. Thanks!
Signature · 3 lines
======================================================================== Ian Pilcher [email protected] ========================================================================
On Mon, 8 Mar 2004 at 11:15am, Ian Pilcher wrote
Quoted 4 lines
I need to quantify the additional CPU load that RAID-0 adds (vs. the boost in I/O performance). I don't need to do anything fancy; 'dd if=/dev/zero of=/dev/md?" should do the trick, but I'm not sure how to track the processor utilization during the run.
bonnie++ reports CPU usage.
Signature · 3 lines
Joshua Baker-LePain Department of Biomedical Engineering Duke University
Quoted 7 lines · Ian Pilcher
I need to quantify the additional CPU load that RAID-0 adds (vs. the boost in I/O performance). I don't need to do anything fancy; 'dd if=/dev/zero of=/dev/md?" should do the trick, but I'm not sure how to track the processor utilization during the run.
Any ideas?
pericles:~ # sar -o /tmp/datafile 1 10000 &
[1] 23533
pericles:~ #
pericles:~ # while :; do /bin/true; done
^C
pericles:~ # date
Mon Mar 8 12:41:01 EST 2004
pericles:~ # kill %1
pericles:~ # sar -f /tmp/datafile
Linux 2.6.3-rc2 (pericles) 03/08/04
12:39:08 CPU %user %nice %system %idle 12:39:10 all 0.00 0.00 0.50 99.50 12:40:26 all 1.76 0.00 2.81 95.43 12:40:27 all 0.00 0.00 0.99 99.01 12:40:38 all 20.70 0.00 33.64 45.66 12:40:39 all 0.00 0.00 0.99 99.01 12:40:55 all 0.06 0.00 0.06 99.88 12:40:57 all 0.00 0.00 0.00 100.00 12:40:58 all 15.00 0.00 24.00 61.00 12:40:59 all 39.00 0.00 61.00 0.00 12:41:00 all 40.00 0.00 60.00 0.00 12:41:01 all 0.00 0.00 1.00 99.00 12:41:02 all 0.99 0.00 0.99 98.02 12:41:03 all 0.00 0.00 0.00 100.00 12:41:05 all 0.00 0.00 0.00 100.00 12:41:07 all 0.00 0.00 0.00 100.00 Average: all 3.82 0.00 6.13 90.05
--
Paul