From: Andi Kleen <andi-Vw/NltI1exuRpAAqCnN02g@public.gmane.org>
To: avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
Markus.Armbruster-5C7GfCeVMHo@public.gmane.org
Subject: Re: Performance monitoring units and KVM
Date: Wed, 30 Jan 2008 19:05:43 +0100 [thread overview]
Message-ID: <p73myqn5gug.fsf@bingen.suse.de> (raw)
In-Reply-To: <47A0B6DF.40208-atKUWr5tajBWk0Htik3J/w@public.gmane.org> (Avi Kivity's message of "Wed\, 30 Jan 2008 19\:41\:51 +0200")
> Is there really a requirement to profile several userspace programs, on
> several guests, simultaneously?
Since guests affect each others performance (e.g. one guest can push
the data of another guest out of cache) profiling over guests makes
a lot of sense. Otherwise you cannot easily diagnose any situations
where a guest affects another guests' performance negatively.
>The usual argument for profiling over gus
If not, passing through the PMU will
> work best, with the additional advantage that guests will not need
> modification (so you can run Windows with VTune, for example).
Ideally you would support both.
-Andi
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next prev parent reply other threads:[~2008-01-30 18:05 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-30 17:06 Performance monitoring units and KVM Markus Armbruster
[not found] ` <87wsprxmyb.fsf-A7mx1g9ivIOttUaS3K59qNi2O/JbrIOy@public.gmane.org>
2008-01-30 17:41 ` Avi Kivity
[not found] ` <47A0B6DF.40208-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2008-01-30 18:05 ` Andi Kleen [this message]
2008-01-30 18:23 ` Balaji Rao
[not found] ` <200801302353.19872.balajirrao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2008-01-30 18:14 ` Avi Kivity
[not found] ` <47A0BE8F.4090508-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2008-01-30 18:26 ` Andi Kleen
[not found] ` <p73ir1b5fvy.fsf-KvMlXPVkKihbpigZmTR7Iw@public.gmane.org>
2008-01-30 19:14 ` Balaji Rao
[not found] ` <200801310044.11055.balajirrao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2008-01-31 3:12 ` Andi Kleen
[not found] ` <20080131031232.GB27115-qrUzlfsMFqo/4alezvVtWx2eb7JE58TQ@public.gmane.org>
2008-01-31 3:44 ` Performance monitoring units and KVM II Andi Kleen
2008-01-31 7:12 ` Performance monitoring units and KVM Balaji Rao
2008-01-30 18:55 ` Balaji Rao
2008-01-30 19:55 ` Markus Armbruster
[not found] ` <87fxwfw0jn.fsf-A7mx1g9ivIOttUaS3K59qNi2O/JbrIOy@public.gmane.org>
2008-01-31 7:03 ` Avi Kivity
[not found] ` <47A172D4.6040505-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2008-01-31 15:42 ` Markus Armbruster
[not found] ` <87odb2gfx5.fsf-A7mx1g9ivIOttUaS3K59qNi2O/JbrIOy@public.gmane.org>
2008-01-31 16:37 ` Avi Kivity
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