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Re: [Qemu-devel] 答复: Can we increase vring size over 1024?
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] 答复: Can we increase vring size over 1024? |
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Date: |
Mon, 5 Sep 2016 16:20:49 -0400 |
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User-agent: |
Mutt/1.7.0 (2016-08-17) |
On Mon, Sep 05, 2016 at 03:21:44AM +0000, Lilijun (Jerry) wrote:
> In our test case, the virtio TX queue is not big enough. The packets
> throughput sent by application in VM is not stable, Sometimes it become very
> large and exceed the service capability of the backend virtual switch, then
> they were dropped unfortunately.
>
> To enlarge application and virtual switch's buffer ring may result other
> difficult problems, So we'd like to increase the virtio TX queue size to 4K
> or 8K.
Why is it okay to enlarge the virtio-net tx queue but not the
application or switch queue?
Stefan
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