Messages in this thread | | | Date | Tue, 16 Mar 2010 11:50:21 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] Enhance perf to collect KVM guest os statistics from host side |
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* Avi Kivity <avi@redhat.com> wrote:
> On 03/16/2010 12:20 PM, Ingo Molnar wrote: > >>>> > >>>>The symbol server's client can certainly access the bits through vmchannel. > >>>Ok, that would work i suspect. > >>> > >>>Would be nice to have the symbol server in tools/perf/ and also make it easy > >>>to add it to the initrd via a .config switch or so. > >>> > >>>That would have basically all of the advantages of being built into the kernel > >>>(availability, configurability, transparency, hackability), while having all > >>>the advantages of a user-space approach as well (flexibility, extensibility, > >>>robustness, ease of maintenance, etc.). > >>Note, I am not advocating building the vmchannel client into the host > >>kernel. [...] > >Neither am i. What i suggested was a user-space binary/executable built in > >tools/perf and put into the initrd. > > I'm confused - initrd seems to be guest-side. I was talking about the host > side.
host side doesnt need much support - just some client capability in perf itself. I suspect vmchannels are sufficiently flexible and configuration-free for such purposes? (i.e. like a filesystem in essence)
Ingo
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