Re: [Qemu-devel] qemu becomes unresponsive sometimes

[Paul Jakma <paul@clubi.ie>]

On Thu, 11 Nov 2004, Paul Jakma wrote:

> Qemu sometimes becomes unresponsive for periods of time. You cant grab the 
> screen, the monitor (with stdio) is unresponsive.
>
> Usually it will come back. However, sometimes not. Eg, I just tried "openssl 
> speed" on Solaris on Qemu, and it never came back - just using 99% CPU for 
> over an hour.

In trying to debug this problem and try find vaguely wherein qemu the 
problem lies, I've observed that strace'ing the spinning qemu'ing 
will cause it to become responsive again.

I've actually taken to running my more important qemu instances with 
a backgrounded strace attached, with strace output directed to 
/dev/null.

Anyone know why qemu sometimes become unresponsive, and why does 
stracing qemu make it become responsive again? (for me, typically 
when stressing qemu, eg running 'openssl speed' or some big java 
application). Am I the only one who experiences this?

regards,
-- 
Paul Jakma	paul@clubi.ie	paul@jakma.org	Key ID: 64A2FF6A
Fortune:
Argue for your limitations, and sure enough, they're yours.
 		-- Messiah's Handbook : Reminders for the Advanced Soul