Re: [PATCH] x86: use cpufreq_quick_get() for /proc/cpuinfo "cpu MHz" again

[Thomas Gleixner]

On Tue, 14 Nov 2017, Linus Torvalds wrote:

> On Tue, Nov 14, 2017 at 2:47 PM, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:
> >
> > So what about the one below?  It works for me as expected.
> 
> Can somebody with 100+ cores test this? Ingo? You had a 160 core
> machine that took forever, didn't you..

On a 144 CPUs machine:

time cat /proc/cpuinfo >/dev/null

Current head:

real	0m0.003s
user	0m0.000s
sys	0m0.002s

Current head + Raphaels patch:

real	0m0.029s
user	0m0.000s
sys	0m0.010s

So that patch is actually slower.

Thanks,

	tglx