On 27/04/09 at 19:40 -0400, john cooper wrote:
Lucas Nussbaum wrote:
On 27/04/09 at 13:36 -0400, john cooper wrote:
Lucas Nussbaum wrote:
non-virtio:
kvm -drive file=/tmp/debian-amd64.img,if=scsi,cache=writethrough -net
nic,macaddr=00:16:3e:5a:28:1,model=e1000 -net tap -nographic -kernel
On 28/04/09 at 12:56 +0200, Lucas Nussbaum wrote:
I then upgraded to kvm-85 (both the host kernel modules and the
userspace), and re-ran the tests. Performance is better (about 85 MB/s),
but still very far from the non-virtio case.
I forgot to mention that the strangest result I got was the
Lucas Nussbaum wrote:
On 28/04/09 at 12:56 +0200, Lucas Nussbaum wrote:
I then upgraded to kvm-85 (both the host kernel modules and the
userspace), and re-ran the tests. Performance is better (about 85 MB/s),
but still very far from the non-virtio case.
I forgot to mention that the
On 28/04/09 at 14:55 +0300, Avi Kivity wrote:
Lucas Nussbaum wrote:
On 28/04/09 at 12:56 +0200, Lucas Nussbaum wrote:
I then upgraded to kvm-85 (both the host kernel modules and the
userspace), and re-ran the tests. Performance is better (about 85 MB/s),
but still very far from the
Hi,
I'm experiencing bad disk I/O performance using virtio disks.
I'm using Linux 2.6.29 (host guest), kvm 84 userspace.
On the host, and in a non-virtio guest, I get ~120 MB/s when writing
with dd (the disks are fast RAID0 SAS disks).
In a guest with a virtio disk, I get at most ~32 MB/s.
Lucas Nussbaum wrote:
Hi,
I'm experiencing bad disk I/O performance using virtio disks.
I'm using Linux 2.6.29 (host guest), kvm 84 userspace.
On the host, and in a non-virtio guest, I get ~120 MB/s when writing
with dd (the disks are fast RAID0 SAS disks).
Could you provide detail of the
On 27/04/09 at 13:36 -0400, john cooper wrote:
Lucas Nussbaum wrote:
Hi,
I'm experiencing bad disk I/O performance using virtio disks.
I'm using Linux 2.6.29 (host guest), kvm 84 userspace.
On the host, and in a non-virtio guest, I get ~120 MB/s when writing
with dd (the disks are fast
Lucas Nussbaum wrote:
On 27/04/09 at 13:36 -0400, john cooper wrote:
Lucas Nussbaum wrote:
non-virtio:
kvm -drive file=/tmp/debian-amd64.img,if=scsi,cache=writethrough -net
nic,macaddr=00:16:3e:5a:28:1,model=e1000 -net tap -nographic -kernel
/boot/vmlinuz-2.6.29 -initrd
