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[Xen-devel] SEDF parameters dont work ?

To: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] SEDF parameters dont work ?
From: "Devdutt Patnaik" <xendevid@xxxxxxxxx>
Date: Mon, 7 Jul 2008 20:04:03 -0400
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Hi,

I tried using simple weights for setting up the sedf scheduler on Xen 3.1 :

[root@mve4 ~]# xm dmesg | grep -i sched
(XEN) Command line: /xen.gz-2.6.18-53.el5 maxcpus=4 sched=sedf com1=115200,8n1 console=com1,vga
(XEN) Using scheduler: Simple EDF Scheduler (sedf)
[root@mve4 ~]# xm sched-sedf Domain-0 -w 2
[root@mve4 ~]# xm sched-sedf vm01 -w 2
[root@mve4 ~]# xm sched-sedf vm02 -w 1
[root@mve4 ~]# xm sched-sedf vm03 -w 1
[root@mve4 ~]# xm sched-sedf vm04 -w 1
[root@mve4 ~]# xm sched-sedf vm05 -w 1
[root@mve4 ~]# xm sched-sedf vm06 -w 1
[root@mve4 ~]# xm sched-sedf
Name                              ID Period(ms) Slice(ms) Lat(ms) Extra Weight
Domain-0                          -1      -0.0      -0.0    -0.0     -1     -1
vm01                              -1      -0.0      -0.0    -0.0     -1     -1
vm02                              -1      -0.0      -0.0    -0.0     -1     -1
vm03                              -1      -0.0      -0.0    -0.0     -1     -1
vm04                              -1      -0.0      -0.0    -0.0     -1     -1
vm05                              -1      -0.0      -0.0    -0.0     -1     -1
vm06                              -1      -0.0      -0.0    -0.0     -1     -1
[root@mve4 ~]# xm sched-sedf vm01
Name                              ID Period(ms) Slice(ms) Lat(ms) Extra Weight
vm01                              -1      -0.0      -0.0    -0.0     -1     -1

I see that the output doesnt show me the correct values that I passed. All values are -ve ( 0 or 1 ).
Is this the correct way to set these values ? Am I missing something ?

I also managed to kill all VMs while playing around with different values of the slice and period.
Any ideas on why this is happening ?

Thanks,
Devdutt.



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