[PATCH] KVM test: Add perfmon into the guest tests

[PATCH] KVM test: Add perfmon into the guest tests

[Chen Cao]

perfmon2 API provides access to the hardware performance counters of
modern processors.

Dependency,
To compile the source code of the test, the following packages should
be installed,
        glibc-static-2.11.1-6.x86_64
        glibc-headers-2.11.1-6.x86_64
        glibc-common-2.11.1-6.x86_64
        glibc-devel-2.11.1-6.x86_64
        glibc-2.11.1-6.x86_64

Note,
1. libpfm uses the Performance Monitor Unit (PMU) on the processors,
but this unit is not provided by kvm currently, i.e. the test should
fail in kvm guests.
2. According to the README file of perfmon-tests-0.3, 2.6.24 or higer
Linux kernel (with perfmon v2.8 or higher) is needed to run the tests.


Signed-off-by: Chen Cao <kcao@redhat.com>
---
 client/tests/kvm/autotest_control/perfmon.control |   16 ++++++++++++++++
 client/tests/kvm/tests_base.cfg.sample            |    2 ++
 2 files changed, 18 insertions(+), 0 deletions(-)
 create mode 100644 client/tests/kvm/autotest_control/perfmon.control

diff --git a/client/tests/kvm/autotest_control/perfmon.control b/client/tests/kvm/autotest_control/perfmon.control
new file mode 100644
index 0000000..d3f5190
--- /dev/null
+++ b/client/tests/kvm/autotest_control/perfmon.control
@@ -0,0 +1,16 @@
+TIME="SHORT"
+AUTHOR = "Stephane Eranian <eranian@google.com>"
+DOC = """
+This is a simple series of test for the perfmon2 API which
+provides access to the hardware performance counters of modern
+processors.
+
+Information about perfmon2 at:
+http://perfmon2.sf.net
+"""
+NAME = 'perfmon'
+TEST_CLASS = 'kernel'
+TEST_CATEGORY = 'Functional'
+TEST_TYPE = 'client'
+
+job.run_test('perfmon')
diff --git a/client/tests/kvm/tests_base.cfg.sample b/client/tests/kvm/tests_base.cfg.sample
index be96dc1..adf4c02 100644
--- a/client/tests/kvm/tests_base.cfg.sample
+++ b/client/tests/kvm/tests_base.cfg.sample
@@ -151,6 +151,8 @@ variants:
                 test_control_file = scrashme.control
             - hwclock:
                 test_control_file = hwclock.control
+            - perfmon:
+                test_control_file = perfmon.control
 
     - linux_s3:     install setup unattended_install
         type = linux_s3

Re: [PATCH] KVM test: Add perfmon into the guest tests

[Jes Sorensen]

On 05/25/10 05:05, Chen Cao wrote:
> perfmon2 API provides access to the hardware performance counters of
> modern processors.
> 
> Dependency,
> To compile the source code of the test, the following packages should
> be installed,
>         glibc-static-2.11.1-6.x86_64
>         glibc-headers-2.11.1-6.x86_64
>         glibc-common-2.11.1-6.x86_64
>         glibc-devel-2.11.1-6.x86_64
>         glibc-2.11.1-6.x86_64
> 
> Note,
> 1. libpfm uses the Performance Monitor Unit (PMU) on the processors,
> but this unit is not provided by kvm currently, i.e. the test should
> fail in kvm guests.
> 2. According to the README file of perfmon-tests-0.3, 2.6.24 or higer
> Linux kernel (with perfmon v2.8 or higher) is needed to run the tests.

I thought perfmon2 was deprecated in favor of perf_event.c ? The only
reference left for perfmon2 in the kernel is in the ia64 tree, and
KVM/ia64 seems to be pretty dead these days.

Cheers,
Jes

Re: [PATCH] KVM test: Add perfmon into the guest tests

[Chen Cao]

On Thu, May 27, 2010 at 10:08:49AM +0200, Jes Sorensen wrote:
> On 05/25/10 05:05, Chen Cao wrote:
> > perfmon2 API provides access to the hardware performance counters of
> > modern processors.
> > 
> > Dependency,
> > To compile the source code of the test, the following packages should
> > be installed,
> >         glibc-static-2.11.1-6.x86_64
> >         glibc-headers-2.11.1-6.x86_64
> >         glibc-common-2.11.1-6.x86_64
> >         glibc-devel-2.11.1-6.x86_64
> >         glibc-2.11.1-6.x86_64
> > 
> > Note,
> > 1. libpfm uses the Performance Monitor Unit (PMU) on the processors,
> > but this unit is not provided by kvm currently, i.e. the test should
> > fail in kvm guests.
> > 2. According to the README file of perfmon-tests-0.3, 2.6.24 or higer
> > Linux kernel (with perfmon v2.8 or higher) is needed to run the tests.
> 
> I thought perfmon2 was deprecated in favor of perf_event.c ? The only
> reference left for perfmon2 in the kernel is in the ia64 tree, and
> KVM/ia64 seems to be pretty dead these days.
> 

Jes,

Thank you for reminding.
I have not noticed your mail this afternoon and resent the patches for
the perfmon test, it seems that i may have made a mistake.

by the way, could you tell me how to verify that "perfmon2 was
deprecated in favor of perf_event.c", except looking into the kernel
code?


Regards,

Cao, Chen
2010/05/27

Re: [PATCH] KVM test: Add perfmon into the guest tests

[Jes Sorensen]

On 05/27/10 11:53, Chen Cao wrote:
> Jes,
> 
> Thank you for reminding.
> I have not noticed your mail this afternoon and resent the patches for
> the perfmon test, it seems that i may have made a mistake.
> 
> by the way, could you tell me how to verify that "perfmon2 was
> deprecated in favor of perf_event.c", except looking into the kernel
> code?

Hi Chen,

I went and checked with people in the community, and I can confirm that
perfmon2 is deprecated for everything but ia64. Since KVM/ia64 is pretty
stale and I doubt it even works, I would not recommend for pushing
perfmon2 tests into autotest at this point.

As for how to see it, then I don't think there really is a way except
for looking at the code.

Cheers,
Jes

PS: Please don't CC closed mailing lists when posting to public lists
like the KVM list.