On 08/19/2009 03:53 PM, Ryota Ozaki wrote:
Hi,
This patch let kvm exposes per-vm statistics about
such as the total number of vm exits, via debugfs.
Existing kvm already collects the per-vm statistics,
but it has no interface to expose them to users.
This patch creates directories named a pid of the
corresponding vm in debugfs of kvm, containing the
same files that original debugfs exposes.
The per-vm statistics are useful to know activities
of vms (and to identify anomalous vms for example)
with more detailed information than cpu and memory
usage, and network traffics. And also the patch
introduces no performance overhead, thus, it should
be familiar with online operations, e.g., dynamic
adaptation of assigning vm resources using the
statistics.
Note that this patch requires a trivial modification
to kvm_stat script. Once this patch is accepted I will
send a patch for it.
Thanks,
ozaki-r
My plan is to completely remove the current statistics in favour of
tracepoints. You can already display tracepoint statistics with 'perf
stat' (see tools/perf); tracepoints have the advantage that they can be
completely disabled at runtime and thus have no performance impact.
--
error compiling committee.c: too many arguments to function
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