Re: [Qemu-devel] [PATCH v2] Optimize screendump

[Stefan Hajnoczi]

On Mon, Jun 20, 2011 at 9:12 AM, Avi Kivity <address@hidden> wrote:
> When running kvm-autotest, fputc() is often the second highest (sometimes #1)
> function showing up in a profile.  This is due to fputc() locking the file
> for every byte written.
>
> Optimize by buffering a line's worth of pixels and writing that out in a
> single call.
>
> Signed-off-by: Avi Kivity <address@hidden>
> ---
>
> v2: drop unportable fputc_unlocked
>
>  hw/vga.c |   13 ++++++++++---
>  1 files changed, 10 insertions(+), 3 deletions(-)

Reviewed-by: Stefan Hajnoczi <address@hidden>