7 messages in com.xensource.lists.xen-develRe: [Xen-devel] Monitoring I/O rate f...| From | Sent On | Attachments |
|---|---|---|
| Thomas Goirand | 26 Nov 2006 13:48 | |
| Keir Fraser | 27 Nov 2006 00:11 | |
| Thomas Goirand | 27 Nov 2006 01:25 | |
| Keir Fraser | 27 Nov 2006 01:40 | |
| Thomas Goirand | 28 Nov 2006 00:04 | |
| Muli Ben-Yehuda | 28 Nov 2006 01:24 | |
| Nick Craig-Wood | 28 Nov 2006 02:50 |
| Subject: | Re: [Xen-devel] Monitoring I/O rate for each VMs |
|---|---|
| From: | Muli Ben-Yehuda (mu...@il.ibm.com) |
| Date: | 11/28/2006 01:24:39 AM |
| List: | com.xensource.lists.xen-devel |
On Tue, Nov 28, 2006 at 04:04:34PM +0800, Thomas Goirand wrote:
Keir Fraser wrote:
On 27/11/06 09:25, "Thomas Goirand" <tho...@goirand.fr> wrote:
Unfortunately these count requests rather than bytes served. This may be what you want though, as #requests should be proportional to the number of expensive disc operations (seeking and settling). Long contiguous requests are not proportionally more expensive than short ones.
Hi!
I didn't find such file where you said. Even a "locate statistics" didn't help. Note that I'm using lvm partitions, and xen 3.0.2-2 (and 2.0.7 in some older servers), and my LVs are of form /dev/lvm1/xen01, is <path-to-vdb> for loopback?
I think the stats were added during 3.0.3 development. There's no way to get the information you seek with older versions of Xen, although you could try taking the blkback driver from a 3.0.3 tree and build it against your Linux dom0 kernel.
cat /sys/block/dm-21/stat 8 0 96 95 63 0 4432 1608 0 579 1703
What are the meaning of those numbers ???
The best way to know is to check the source code that generates them...
Cheers, Muli
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