[libvirt] [PATCH 1/2] Get cpuMhz of virNodeGetInfo() from cpufreq/cpuinfo_max_freq, if exist
Eric Blake
eblake at redhat.com
Mon Jan 31 22:46:39 UTC 2011
On 01/27/2011 02:51 AM, Minoru Usui wrote:
> virNodeGetInfo() gets from
> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq, first.
>
> Signed-off-by: Minoru Usui <usui at mxm.nes.nec.co.jp>
I haven't looked closely at this series yet...
> + /*
> + * nodeinfo->mhz should return maximum frequency,
> + * but "cpu MHz" of /proc/cpuinfo is scaled by power saving feature.
> + * So it gets cpufreq/cpuinfo_max_freq, if possible.
> + */
> + ret = get_cpu_value(0, "cpufreq/cpuinfo_max_freq", true);
> + if (ret < 0)
> + return -1;
> + else if (ret != 1) {
> + /* convert unit */
> + cpu_mhz = ret / 1000;
But which units is this converting between, and should it truncate or
round up?
--
Eric Blake eblake at redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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