-Original Message-
From: Dor Laor [mailto:[EMAIL PROTECTED]
Sent: Monday, December 01, 2008 5:27 PM
To: Adrian Schmitz
Cc: kvm@vger.kernel.org; Avi Kivity
Subject: Re: STOP error with virtio on KVM-79/2.6.18/Win2k3 x64 guest
What driver version are you using? Version 2 is obsolete.
I posted ver 3 few months ago, Avi can you please upload it to
sourceforge.
My old public space was blocked so I'll send you a private attachment
to
test.
Dor.
Okay, I received the version 3 drivers and installed them on my guest.
This fixed the STOP errors. I can now run the same iperf tests without
any crashes.
The only problem I have now is that the virtio seems to be slower for me
than e1000. Running iperf between the guest machine and the bridge
interface on the host using the e1000 driver consistently gave
measurements of around 320 Mb/s. With the new virtio drivers, I'm
getting roughly 120 Mb/s. I'm not sure if I'm missing something simple.
I tried changing the connection rate setting in the guest from the
default 100M to 1G, but that didn't seem to help. I also tried using a
tcp window size of 16k instead of the guest os default 8k, but that
didn't make much of a difference, either. Below is some information
about my setup. Please let me know if there's any other info I can
provide, and thanks again for your help.
Host Dist: CentOS 5.2
Host Kernel:2.6.18
Host Hardware: Dual AMD Quad-Core, 8G memory
KVM Version:79 (modules and tools built and installed from source)
Guest OS: Windows 2003 Server x64 SP2 (with all critical
updates)
Guest VCPUs:2
Guest memory: 4G
KVM command used: /usr/bin/kvm -S -M pc -m 4096 -smp 2 -name bth-host00
-uuid 84d941a5-126e-d001-6029-d7d434a7dad6 -monitor pty -localtime -boot
c -drive file=/dev/mapper/sys_bth-host00,if=ide,index=0,boot=on -drive
file=/isoimages/netkvm.iso,if=ide,media=cdrom,index=2 -net
nic,macaddr=00:16:3e:5d:a7:46,vlan=0,model=virtio -net
tap,fd=19,script=,vlan=0,ifname=vnet1 -serial none -parallel none -usb
-usbdevice tablet -vnc 127.0.0.1:1
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