From: lsorense@csclub.uwaterloo.ca (Lennart Sorensen)
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] ppc emulation and interrupts
Date: Wed, 21 Jan 2009 09:39:43 -0500 [thread overview]
Message-ID: <20090121143942.GF29175@csclub.uwaterloo.ca> (raw)
In-Reply-To: <49770BB6.9050707@eu.citrix.com>
On Wed, Jan 21, 2009 at 11:49:10AM +0000, Stefano Stabellini wrote:
> Hi all,
> one of the recent problems, noticed after the displaystate change,
> affects ppc emulation only and is due to the fact that none on ppc
> emulation is issuing any interrupt request of the CPU_INTERRUPT_EXIT
> kind if the gui timer is disabled.
> Hence qemu never leaves the loop in cpu-exec.c:cpu_exec.
> If the gui timer is enabled qemu is able to leave the loop because the
> condition (interrupt_request & CPU_INTERRUPT_EXIT) is true when the
> timer is triggered.
> I think this is a problem with the ppc emulation but if you ppc guys
> need the gui timer to be always on, I can arrange for it to be.
> Regards,
So does this explain why vnc runs fast and sdl runs slow?
Even with the latest patches, sdl is still slow for ppc emulation. Not
using much cpu either of course.
--
Len Sorensen
next prev parent reply other threads:[~2009-01-21 14:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-21 11:49 [Qemu-devel] ppc emulation and interrupts Stefano Stabellini
2009-01-21 14:39 ` Lennart Sorensen [this message]
2009-01-21 19:24 ` Stefano Stabellini
2009-01-21 19:42 ` Blue Swirl
2009-01-21 19:44 ` Lennart Sorensen
2009-01-21 17:01 ` Blue Swirl
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