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Re: [Qemu-devel] virtio-scsi vs. virtio-blk
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] virtio-scsi vs. virtio-blk |
Date: |
Thu, 09 Aug 2012 15:42:15 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 |
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.
Paolo
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, (continued)
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Paolo Bonzini, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Paolo Bonzini, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Paolo Bonzini, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, ronnie sahlberg, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Paolo Bonzini, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk,
Paolo Bonzini <=
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Paolo Bonzini, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/09
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Paolo Bonzini, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Paolo Bonzini, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, ronnie sahlberg, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, ronnie sahlberg, 2012/08/10