From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH] kvm-unit-tests: x86: pmu: call measure for every
 counter in check_counters_many
Date: Mon, 25 Aug 2014 15:32:27 -0400 (EDT)
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To: Chris J Arges <chris.j.arges@canonical.com>
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> Ok I see now where this patch doesn't make sense.
> With the latest kvm tree I get:
> 
> sudo ./x86-run x86/pmu.flat -smp 1 -cpu host | grep -v PASS
> 
> 
> qemu-system-x86_64 -enable-kvm -device pc-testdev -device
> isa-debug-exit,iobase=0xf4,iosize=0x4 -display none -serial stdio
> -device pci-testdev -kernel x86/pmu.flat -smp 1 -cpu host
> enabling apic
> paging enabled
> cr0 = 80010011
> cr3 = 7fff000
> cr4 = 20
> PMU version:         2
> GP counters:         4
> GP counter width:    48
> Mask length:         7
> Fixed counters:      3
> Fixed counter width: 48
> FAIL: all counters
> 
> SUMMARY: 67 tests, 1 unexpected failures
> Return value from qemu: 3
> 
> I've tested this on a few Intel platforms (sandybridge/haswell), I'll
> look into the code more then.


Are you using the NMI watchdog in the host?  It eats one PMU counter
and makes this test fail.

Paolo