| |
|
 |
|
 |
|
|
|
| |
|
|
xen-users
Re: [Xen-users] Release 0.8.0 of GPL PV Drivers for Windows
James Harper wrote:
Xensource and VirtualIron claim "near bare metal performance" with PV
I think performance could be a little bit better than that!
Andy: Any suggestions? Do you think your last cleanup commit could have
reduced performance at all?
It'd be great to get real numbers instead of vague performance claims. I
think eval versions of at least some other PV drivers are available --
Novell? XenSource? -- if someone was willing to do some benchmarking to
see how things fall out for both send and receive.
I would not be at all surprised if our drivers performed worse, since we
haven't tuned them much at all yet. But we need data. For TX, we are
performing a copy to linearize the packet because for each packet
Windows gives us 3 little + 1 big buffer, and I thought we wouldn't want
to spend 4 grant refs per packet. I think that's the right thing to do
but who knows. We also don't implement large sends. Other culprits might
be lock contention, or maybe we need to add interrupt moderation to
reduce the number of interrupts per packet.
Regards -- Andy
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
|
|
| |
|
Home