[rfc] Radeon AGP support patches

[William A. Mahaffey III]

On 10/26/14 10:42, Tijl Coosemans wrote:
> On Sun, 26 Oct 2014 16:24:42 +0100 Tijl Coosemans <tijl at FreeBSD.org> wrote:
>> I worked on AGP support for Radeon cards this week.
> Results from the small benchmark test built into the driver:
>
> RV350 in PCI mode:
> dma 1024 bo moves of 1024 kB from 2 to 4 in 13419 ms, throughput: 624 Mb/s or 78 MB/s
> blit 1024 bo moves of 1024 kB from 2 to 4 in 22959 ms, throughput: 360 Mb/s or 45 MB/s
> dma 1024 bo moves of 1024 kB from 4 to 2 in 4289 ms, throughput: 1952 Mb/s or 244 MB/s
> blit 1024 bo moves of 1024 kB from 4 to 2 in 8020 ms, throughput: 1040 Mb/s or 130 MB/s
>
> RV350 in AGP mode:
> dma 1024 bo moves of 1024 kB from 2 to 4 in 3100 ms, throughput: 2704 Mb/s or 338 MB/s
> blit 1024 bo moves of 1024 kB from 2 to 4 in 1236 ms, throughput: 6784 Mb/s or 848 MB/s
> dma 1024 bo moves of 1024 kB from 4 to 2 in 2535 ms, throughput: 3304 Mb/s or 413 MB/s
> blit 1024 bo moves of 1024 kB from 4 to 2 in 2537 ms, throughput: 3304 Mb/s or 413 MB/s
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*Caution:* idiot question: Is this code for AGP gfx cards ? I thought 
AGP cards/slots were pretty much dead & buried .... Does this same code 
get used in/with newer gfx cards/GPU's ? Just askin' .... *Very* nice 
performance pickup if so. TIA & Thx for the ongoing work :-).


-- 

	William A. Mahaffey III

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