Re: virtio support
Samuel Thibault, on Mon 08 Feb 2016 19:09:48 +0100, wrote:
> Ritesh Raj Sarraf, on Mon 08 Feb 2016 23:33:53 +0530, wrote:
> > On Mon, 2016-02-08 at 23:24 +0530, Ritesh Raj Sarraf wrote:
> > > In today's upgrade, 2 observations I have that I'd like to share.
> > >
> > > 1) I'm using the rtl8139 network driver emulated with qemu. I fetched
> > > some data (around 200 MiB) over the network from the host (Linux)
> > > machine. The network speed I got was average 250 KiB/Sec
> >
> > And I think part of the reason may be the emulation. Especially for the
> > block device, when you do I/O, the CPU usage is persistently 100%.
>
> That's way too much. On my laptop (nothing fancy, just a Core i5), I
> typically get 15MB/s transfers.
>
> Again, do you really have KVM enabled?
Also, do you use cache=writeback as advised in our documentations?
Samuel
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