On Mon, 2007-10-22 at 05:33 -0700, Stephane Eranian wrote:
> 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 Instrumented pfm_core_probe_pmu and my processor famiy is 6, model is 15.
Below is the log messages.
perfmon: not an AMD processor
perfmon: AMD64 PMU detection failed
perfmon: unsupported family=6
perfmon: Intel P4 PMU detection failed
YMZ---pfm_core_probe_pmu: x86=6 x86_model=15
perfmon: nmi_watchdog=0 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
perfmon: detected architecural perfmon v2
perfmon: num_gen=2 width=40 num_fixed=3 width=40
perfmon: register Intel architectural PMU error -16
perfmon: added sampling format pebs64_p4
perfmon: added sampling format pebs_core
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