Hi, Eric
On Mon, 31 Jan 2011 15:46:39 -0700
Eric Blake <eblake@xxxxxxxxxx> wrote:
> 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@xxxxxxxxxxxxxxxxx>
>
> 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?
I think it divide by 1000 is collect, because my machine returns below values.
-----------------------------------------------------------------
# cat /sys/devices/system/cpu/cpu?/cpufreq/cpuinfo_max_freq
2333331
2333331
2333331
2333331
2333331
2333331
2333331
2333331
# grep 'cpu MHz' /proc/cpuinfo
cpu MHz : 2333.331
cpu MHz : 2333.331
cpu MHz : 2333.331
cpu MHz : 2333.331
cpu MHz : 2333.331
cpu MHz : 2333.331
cpu MHz : 2333.331
cpu MHz : 2333.331
-----------------------------------------------------------------
On the other hand, I don't have clear opinion about truncate or round up.
Present implementation of linuxNodeInfoCPUPopulate() selects truncate,
so I implement to truncate logic.
--
Minoru Usui <usui@xxxxxxxxxxxxxxxxx>
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