Re: [Xen-devel] Xen Performance metrics

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

The metric labels aren't really descriptive enough to figure out exactly what they are.  If you describe what information you want, we may be able to get it to you.

Using the xend api is probably not a good plan going forward -- it's likely that we're going to remove xend in the next release (4.2).  You may want to consider looking at XCP, which has an api, and also collects a number of statistics.  If not, there is a lot of data available, it's just a matter of getting it "plumbed" from Xen / wherever to somewhere you can use it.

 -George

2011/4/7 <Lu.YJ@xxxxxxxxxxxx>

Hi everyone,

 

I am studying the Xen performance metrics.

My questions are if we can get the following metrics from Xen hypervisor interface / XEND API (XEN management API) or not ?

cpu.extra.summation, cpu.ready.summation,

disk.busResets.summation, disk.commandsAborted.summation, disk.queueLatency.average,

mem.active.average, mem.overhead.average

If no, plan to add them? or How to add them?

 

As I study, there are the following results about XEN performance metrics on the current XEN 4.1.0.

BTW, VMWARE hypervisor can get all the metrics below.

We can determine if the VM / host encounter the bottleneck issues using the performance metrics.

	Xen (hypervisor) interface	Xen enabled kernel (drivers like balloon, network / block backend, privcmd,…)	XEN (management) API (XEND API)	Libvirt API
CPU
1. cpu.extra.summation
2. cpu.ready.summation
3. cpu.usagemhz.average	v	x	V	V
disk
4. disk.busResets.summation
5.disk.commandsAborted.summation
6. disk.totalLatency.average
7. disk.queueLatency.average
Throughput: An average of 8. disk.read.average and 9. disk.write.average 10. disk throughput  = (disk.read.average + disk.write.average ) /2	x	v	V	V
memory
11. mem.active.average
12. mem.consumed.average	v	x	V	V
13. mem.overhead.average
Memory Swapping: 14. mem.swapin.average, 15. mem.swapout.average 16. mem.swapped.average	v	x	x	V
17.mem.vmmemctl.average(balloon)	x	v	x	V
network
18. net.received.average, 19. net.transmitted.average and 20. net.usage.average	x	v	V	V

 

 

Thanks.

YJ

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