Re: [PATCH 9/9] perf kvm stat report: Add option to analyze specificVM

From: David Ahern
Date: Mon Aug 05 2013 - 10:57:56 EST

On 8/5/13 2:57 AM, Xiao Guangrong wrote:
On 08/03/2013 04:05 AM, David Ahern wrote:
Add an option to analyze a specific VM within a data file. This
allows the collection of kvm events for all VMs and then analyze
data for each VM (or set of VMs) individually.

Interesting.

But how can we know which pid is the guest's pid after collecting
the info. Even if the .data file is moved to another box to do
off-analyze?


Up to the user to be able to leverage the option by collecting what ever information is needed to correlate a qemu pid with a guest VM.

I have 2 use cases. In one I have a set of shell scripts for managing VMs:

Id Profile PID IP Address Description
-- ---------------- ----- --------------- ----------------
01 ubuntu10 - 172.16.128.51 Ubuntu 10.04 LTS
02 f12-x86_64 8841 172.16.128.52 Fedora 12, x86_64
05 f10-i386 - 172.16.128.55 Fedora 10, i386
07 f16-i386 - 172.16.128.57
08 f16-x86_64 - 172.16.128.58
09 rhel5.5-i386 14716 172.16.128.59 RHEL 5.5, i386
10 f10-x86_64 - 172.16.128.60
12 rhel47-vm1 - 172.16.128.62 rhel4.7 - 32-bit
13 f17 - 172.16.128.63 Fedora 17, x86_64
15 f14 - 172.16.128.65 Fedora 14 - x86_64
16 f10-ppc - 172.16.128.66
17 f12-ppc - 172.16.128.67
19 f16-ppc - 172.16.128.69
20 f16-i386-2 - 172.16.128.70 clone of f16-i386
21 f18-controller 29590 172.16.128.71 cloud controller
22 f18 29541 172.16.128.72 Fedora 18 - x86_64

Collecting that information allows me to correlate kvm data to a VM pid. I can collect the events for the system and then analyze for a specific VM.

In the second use case (product based) there are 2 VMs and a different qemu binary name (along with command line arguments) for telling them apart.

David
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