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Re: [Qemu-devel] qemu 1.1.0 slow as hell booting ?
From: |
Luigi Rizzo |
Subject: |
Re: [Qemu-devel] qemu 1.1.0 slow as hell booting ? |
Date: |
Fri, 20 Jul 2012 13:20:08 +0200 |
User-agent: |
Mutt/1.4.2.3i |
On Thu, Jul 19, 2012 at 04:43:05PM +0200, Luigi Rizzo wrote:
> hi,
> while playing with various qemu versions i noticed that
> qemu-devel now in FreeBSD ports (1.1.0) is slow as hell when
> booting FreeBSD (take for instance the netmap image at
>
> http://info.iet.unipi.it/~luigi/netmap/20120608-netmap-picobsd-head-amd64.bin
>
> while 0.11.x and 1.1.1 and 1.0.1 seem to work well.
>
> I should mention that i had the same exact problem a few months
> ago with a qemu version compiled on my Mac using macports,
> which was fixed by manually building one myself from the sources
> (the working Mac version reports version 1.0.91; unfortunately
> i do not remember which version it was, but judging from the
> macports history it could have been either 0.14.1 or 1.0)
> so i do not think this is a specific problem with FreeBSD.
>
> Are you able to reproduce this problem ? Any idea on what could it be ?
Just for the archives:
the problem was that the FreeBSD port, when compiling with CLANG,
used --enable-tcg-interpreter which caused the slow code to be
generated. I suppose the same problem existed in the macports version
cheers
luigi
> cheers
> luigi