[Xen-users] Re: xen 2.0.7 on SuSE 9.3 very slow responses in dom0

[Dirk Estreng <dirk.estreng@xxxxxx>]

Tracked it down a little more:

running: "bonnie++ -s 2048 -d /var/tmp -u root" in dom0 
watching: "iostat -x -d 2" gives:

await  svctm  %util
6953.33 111.11 100.00
9039.17 166.67 100.00
(...)

man iostat says: "%util: Percentage of CPU time during which I/O requests 
were issued to the device (bandwidth utilization for the  device).  Device 
saturation occurs when this value is close to 100%.

Running: "mpstat 3 5" while bonnie++ runs shows:

15:51:33     CPU   %user   %nice %system %iowait    
15:51:36     all    0.00    0.00    0.00   99.67
15:51:39     all    0.00    0.00    0.00  100.00
15:51:42     all   20.33    0.00   14.00   65.67   
15:51:45     all    0.00    0.00    0.00  100.00
15:51:48     all    0.00    0.00    0.00  100.00

man mpstat says: "%iowait: Show the percentage of time that the CPU or CPUs 
were idle during which the system had an outstanding disk I/O request."

So as far as i understand my ATA drive locks up my CPU...
Where is the problem??

I am running:
xen2.0.7 on suse 9.3 with 2.6.11.4-21.8-xen


Thanks Dirk



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