Re: [Xen-users] xen power management

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

I don't know much, is http://wiki.xen.org/wiki/Xen_power_management
helpful?

I suspect some dom0 kernel options need to be enabled relating to PM and
cpufreq even in Xen mode (i.e. to propagate ACPI info to the h/v). In
particular if you are using an upstream paravirt ops kernel this may
require you to have a new enough version, but again I don't know the
specifics of what "new enough" means here.

Posting details of the versions you are running and the config might
trigger someone's memory perhaps.

Ian.

On Wed, 2014-12-03 at 04:09 +0100, lee wrote:
> Nobody knows?  Is power management broken?
> 
> 
> lee <lee@xxxxxxxxxxx> writes:
> 
> > Hi,
> >
> > what could I do the get power management to work?
> >
> >
> > root@heimdall:~# xenpm get-cpufreq-states all
> > root@heimdall:~# xenpm get-cpufreq-para all
> > [CPU0] failed to get cpufreq parameter
> > [CPU1] failed to get cpufreq parameter
> > [CPU2] failed to get cpufreq parameter
> > [CPU3] failed to get cpufreq parameter
> > [CPU4] failed to get cpufreq parameter
> > [CPU5] failed to get cpufreq parameter
> > [CPU6] failed to get cpufreq parameter
> > [CPU7] failed to get cpufreq parameter
> > root@heimdall:~# xenpm get-cpu-topology all
> > CPU     core    socket  node
> > CPU0     0       1       0
> > CPU1     1       1       0
> > CPU2     2       1       0
> > CPU3     3       1       0
> > CPU4     0       0       0
> > CPU5     1       0       0
> > CPU6     2       0       0
> > CPU7     3       0       0
> > root@heimdall:~# xenpm set-scaling-governor ondemand all
> > failed to set governor name
> > root@heimdall:~#
> >
> >
> > 'xenpm get-cpuidle-states all' gives some output and says "total C-states :
> > 2".  The CPUs are L5420s.
> >
> >
> > xen-4.1-amd64.gz placeholder dom0_mem=1024M,max:1024M dom0_max_vcpus=2
> > cpufreq=xen cpuidle hpetbroadcast
> 



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