Re: [Qemu-devel] Re: QEMU-KVM and video performance

[Gerhard Wiesinger]

On Mon, 10 May 2010, Avi Kivity wrote:

> On 05/09/2010 10:35 PM, Gerhard Wiesinger wrote:
> > > >
>
> For 256 color more the first priority is to find out why direct mapping is 
> not used.  I'd suggest tracing the code that makes this decision (in 
> hw/*vga.c) and seeing if it's right or not.

I think this is because A000 is not initialized for KVM (see log below 
and logging patch attached).

Switches tried without success:
-vga std (log is from this one)
-vga cirrus
-vga vmware

I tried also to force the mapping (see patch where it is commented out) 
but some errors occour (see 2nd log below) and performance is still 
low at ~1MB/s:
s->lfb_vram_mapped = 1;

On testing the following line occour:
vga_dirty_log_start
vga_dirty_log_start
vga_dirty_log_start
vga_dirty_log_start
vga_dirty_log_start
vga_dirty_log_start
...

Any ideas? Can you reproduce it?

Thnx.

Ciao,
Gerhard

--
http://www.wiesinger.com/

vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_map_addr, start=0xF0000000, len=0x01000000
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start
vga_dirty_log_start_mapping_map_addr, start=0xF0000000, len=0x01000000
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_map_addr, start=0xF0000000, len=0x01000000
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
--------------------------------------------------------------------------------------
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
vga_dirty_log_start_mapping_map_addr, start=0xF0000000, len=0x01000000
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
vga_dirty_log_start
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start
vga_dirty_log_start_mapping_map_addr, start=0xF0000000, len=0x01000000
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start
vga_dirty_log_start_mapping_map_addr, start=0xF0000000, len=0x01000000
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A0000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a0000-00000000000a7fff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0x000A8000, len=0x00008000
BUG: kvm_dirty_pages_log_change: invalid parameters 
00000000000a8000-00000000000affff
vga_dirty_log_start_mapping_lfb_vram_mapped, start=0xE0000000, len=0x01000000

vga_kvm_debug.patch
Description: Text document