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RE: [Xen-devel] [PATCH 1/3] Output Virtual Block Device requests informa
| To: | "'NAHieu'" <nahieu@xxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-devel] [PATCH 1/3] Output Virtual Block Device requests information to /proc/xen/vbd |
| From: | "Satoshi Uchida" <s-uchida@xxxxxxxxxxxxx> |
| Date: | Wed, 21 Jun 2006 19:25:36 +0900 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Wed, 21 Jun 2006 03:26:03 -0700 |
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| Thread-index: | AcaVGi6XPYgVTPUBT2iLy8ja+MqnfwAAQDVw |
Hi, >> >> The first line shows domain information. >> Detail: Domain [Domain ID] - oo [oo-reqs] rd [rd-reqs] wr [wr-reqs]. > >Cool! But what is the "oo" and "oo-reqs" in the above line? The oo-reqs is counted up in the case that request is blocked for no pending queues in blkback. BUt, I don't know that what does OO stand for. If oo-req counts up huge amount in short time, so it means that I/O request is very high load. Namely, I/O performance of devices will not do I/O requests of VMs(DomUs). If oo-req is not increased, so it means that I/O performance is enough for I/O reuests of VMs(DomUs). Thanks, Satoshi UCHIDA
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