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Re: [Qemu-devel] Re: QEMU-KVM and video performance
From: |
Jamie Lokier |
Subject: |
Re: [Qemu-devel] Re: QEMU-KVM and video performance |
Date: |
Wed, 21 Apr 2010 19:39:31 +0100 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Avi Kivity wrote:
> Writes to vga in 16-color mode don't change set a memory location to a
> value, instead they change multiple memory locations.
While code is just writing to the VGA memory, not reading(*) and not
touching the VGA I/O register that control the write latches, is it
possible in principle to swizzle the format around in memory to make
regular writes work?
(*) Reading should be ok for some settings of the write latches, I
think.
I wonder if guests of interest behave like that.
> >Is this a case where TCG would run significantly faster for code blocks
> >that have been detected to access the VGA memory?
>
> Yes.
$ date
Wed Apr 21 19:37:38 2015
$ modprobe ktcg
;-)
-- Jamie
- [Qemu-devel] QEMU-KVM and video performance, Gerhard Wiesinger, 2010/04/19
- [Qemu-devel] Re: QEMU-KVM and video performance, Avi Kivity, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Jamie Lokier, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Avi Kivity, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Gerhard Wiesinger, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Avi Kivity, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Gerhard Wiesinger, 2010/04/22
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Avi Kivity, 2010/04/22
- Re: [Qemu-devel] Re: QEMU-KVM and video performance,
Jamie Lokier <=
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Avi Kivity, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Jamie Lokier, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Gerhard Wiesinger, 2010/04/22
Re: [Qemu-devel] Re: QEMU-KVM and video performance, Gerhard Wiesinger, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Jamie Lokier, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Gerhard Wiesinger, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Jamie Lokier, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Gerhard Wiesinger, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Jamie Lokier, 2010/04/21
- Re: [Qemu-devel] Re: QEMU-KVM and video performance, Gerhard Wiesinger, 2010/04/22