From: Paolo Bonzini <pbonzini@redhat.com>
To: Chris J Arges <chris.j.arges@canonical.com>
Cc: kvm@vger.kernel.org
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) [thread overview]
Message-ID: <1883019063.35938857.1408995147601.JavaMail.zimbra@redhat.com> (raw)
In-Reply-To: <53FB76AB.80206@canonical.com>
> 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
next prev parent reply other threads:[~2014-08-25 19:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-14 20:58 [PATCH] kvm-unit-tests: x86: pmu: call measure for every counter in check_counters_many Chris J Arges
2014-08-25 16:45 ` Paolo Bonzini
2014-08-25 17:47 ` Chris J Arges
2014-08-25 19:32 ` Paolo Bonzini [this message]
2014-08-25 19:38 ` Chris J Arges
2014-08-26 10:52 ` Paolo Bonzini
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