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From: | Stefan Priebe - Profihost AG |
Subject: | Re: [Qemu-devel] virtio-scsi vs. virtio-blk |
Date: | Thu, 09 Aug 2012 16:25:43 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120714 Thunderbird/14.0 |
Am 09.08.2012 15:42, schrieb Paolo Bonzini:
Il 09/08/2012 15:39, Stefan Priebe - Profihost AG ha scritto:scsi-generic would indeed incur some overhead because it does not do scatter/gather I/O directly, but scsi-hd/scsi-block do not have this overhead. In any case, that should be visible through the output of perf if it is significant.Thanks for your help and replies. I'm a little bit lost on all these comments. So what to check / do next?Try with the deadline scheduler, and run "perf top" in guest/host if the problems persist.
Right now i'm just starting to ping from the guest to a random domain. it works for around 65s then i get the message:
ping: senmsg: No buffer space available and the network connection is away until i reboot the guest. Stefan
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