Hello,
On Mon, Oct 22, 2007 at 10:55:08AM +0800, Zhang, Yanmin wrote:
> > >
> > > Below is the part of dmesg related to perfmon processors identification:
> > >
> > > perfmon: unsupported CPU model 14
> > > perfmon: Intel P6 processor Family PMU detection failed
> > > perfmon: unsupported family=6
> >
> > Normal.
> >
> > > perfmon: Intel P4 PMU detection failed
> >
> > Normal
> >
> > > perfmon: nmi_watchdog=-1 nmi_active=0 force_nmi=0
> > > perfmon: PEBS supported, enabled
> > > perfmon: Intel Core PMU detected, 4 PMCs, 5 PMDs, 5 counters (31 bits)
> > > perfmon: Intel Core PMU installed
> >
> > Not normal.
> >
> > > perfmon: detected architecural perfmon v1
> > > perfmon: num_gen=2 width=40 num_fixed=0 width=0
> > > perfmon: register Intel architectural PMU error -16
> >
> > That's normal because there is already a description registered.
> >
> > > Looks like it finds the hardware, but later fails to register it (line
> > > with
> > > "error -16", -EBUSY. So something like the following to generate some
> > > more
> > > detail information information from the PFM_INFO's would be useful:
> > >
> > In perfmon_intel_core.c, look at the :
> >
> > static int pfm_core_probe_pmu(void)
> > {
> > unsigned int i;
> >
> > /*
> > * Check for Intel Core processor explicitely
> > * Checking for cpu_has_perfmon is not enough as this
> > * matches intel Core Duo/Core Solo but none supports
> > * PEBS.
> > *
> > * Intel Core = arch perfmon v2 + PEBS
> > */
> > if (cpu_data->x86 != 6 || cpu_data->x86_model != 15)
> >
> > If you come in with 6,14, this should fail. But it seems you have things
> > compiled in, so maybe there is something wrong there
Could someone instrument pfm_core_probe_pmu() to print out the x86 and
x86_model values.
After rechecking on my machines, this works fine with me even when everything
is compiled
in. I do not have a 6/14 machine. Also please try again using the 2.6.23 kernel
patch so
that we compare the same code.
> I ran into the same issue on my new quad-core machine. Is there any update?
Are you sure you have processor famiy 6, model 15?
Please instrument pfm_core_probe_pmu() as well.
Thanks.
--
-Stephane
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