Le 30/01/2017 à 04:03, Takashi YAMAMOTO a écrit :
hi,
On Sat, Jan 28, 2017 at 6:42 PM, Maxime Villard <[email protected]
<mailto:[email protected]>> wrote:
I've updated my patch. The previous one was completely wrong. However, I'm
not
going to commit it now.
For the record: in fact, I cannot measure the performance because of two
issues
- our PMCs do not support SMP, which is problematic since false-sharing
occurs
with at least two CPUs. I can't get the interesting measurement MSRs on
my
AMD.
tprof used to work fine on smp when i was using it actively.
no idea about your cpu model though.
Indeed - I was more looking at i386/pmc.c. I have tried tprof, but after reading
the AMD spec I figured out that my AMD Athlon x3 does not support PMCs at all
(no CPUID_PCENB). I will try on an AMD Phenom II, but I suspect it does not
support PMCs either.
