Rusty Russell wrote:
On Tuesday 07 April 2009 00:49:17 Tomasz Chmielewski wrote:
Tomasz Chmielewski schrieb:
As I mentioned, it was using virtio net.
Guests running with e1000 (and virtio_blk) don't have this problem.
Also, virtio_console seem to be affected by this "slowness" issue.
I'm pretty sure this is different. Older virtio_console code ignored
interrupts and polled, and use a heuristic to back off on polling (this was
because we used the generic "hvc" infrastructure which hacked support).
You'll find a delay on the first keystroke after idle, but none on the
second.
I still observe this "slowness" with kvm-86 after the guest is running
for some time (virtio_net and virtio_console seem to be affected; guest
restart doesn't fix it).
--
Tomasz Chmielewski
http://wpkg.org
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