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Re: [Qemu-devel] [PATCH v2 00/39] bitmap handling optimization
From: |
Juan Quintela |
Subject: |
Re: [Qemu-devel] [PATCH v2 00/39] bitmap handling optimization |
Date: |
Wed, 06 Nov 2013 16:38:21 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
Gerd Hoffmann <address@hidden> wrote:
> Hi,
>
>> - vga ram by default is not aligned in a page number multiple of 64,
>>
>> it could be optimized. Kraxel? It syncs the kvm bitmap at least 1
>> a second or so? bitmap is only 2048 pages (16MB by default).
>> We need to change the ram_addr only
>
> It is created using memory_region_init_ram(), in vga_common_init().
> Nothing special is done to avoid/force any alignment.
> Dunno why it ends up on a odd page number.
>
>> - vga: still more, after we finish migration, vga code continues
>> synchronizing the kvm bitmap on source machine. Notice that there
>> is no graphics client connected to the VGA. Worth investigating?
>
> Yep, needed to figure updated screen areas. It never stops completely,
> but the refresh rate should be alot lower with no vnc client connected,
> something like once every few seconds without client vs. 30x per second
> with client.
When the guest is stopped you really need to ask kvm for changes?
strange, no?
Later, Juan.
Re: [Qemu-devel] [PATCH v2 00/39] bitmap handling optimization, Chegu Vinod, 2013/11/08
Re: [Qemu-devel] [PATCH v2 00/39] bitmap handling optimization, Michael R. Hines, 2013/11/25