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software OS4   software OS4 : Sam460ex_setup released
   posted by m3x on 13-Jun-2012 13:48:53 (3422 reads)
A little utility to optimize performance on your Sam460ex board.

What it does:

* enables Store Gathering in CCR0 register.
This new setting doubles write speed to a PCI Express graphic card (up to 320 MB/s
on a Radeon X1950 and up to 300 MB/s on a Radeon HD 4650 PCI-E card) and
increase 50% write speed to a PCI card.
Ragemem and Gfxbench2D will show higher values for CPU (not DMA) initiated
data transfers.


How to use:

* add the utility to WBStartup with Prefs/WBStartup, or put it in S:user-startup
if you need to specify arguments

* if run from the shell, it accept the following arguments:
VERBOSE to show some informations

Notes:

* This utility may be obsolete with a future AOS4.1 kernel update.

History:

13-Jun-2012 - Version 1.0
first release.

You can download it from OS4Depot now!
    

STORYID: 6402
Related Links
· More about software OS4
· News by m3x


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PosterThread
KimmoK 
Re: Sam460ex_setup released
Posted on 13-Jun-2012 17:16:02
#1 ]
Elite Member
Joined: 14-Mar-2003
Posts: 5210
From: Ylikiiminki, Finland

Are these 320MB/sec values the highest ever reported for graphic card writes on Amiga PPC devices?
On any PowerPC HW ever? (fastest G5 PowerMacs might have been better than this)

(I imagine it's the same as RAM to VRAM copy thingly like on Hanz tests
http://hdrlab.org.nz/benchmark/gfxbench2d/OS/AmigaOS/Result/584
http://hdrlab.org.nz/benchmark/gfxbench2d/OS/AmigaOS/Result/656 )

Last edited by KimmoK on 13-Jun-2012 at 05:23 PM.
Last edited by KimmoK on 13-Jun-2012 at 05:22 PM.
Last edited by KimmoK on 13-Jun-2012 at 05:17 PM.
Last edited by KimmoK on 13-Jun-2012 at 05:16 PM.


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// For freedom, for honor, for AMIGA
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pavlor 
Re: Sam460ex_setup released
Posted on 13-Jun-2012 17:59:35
#2 ]
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Joined: 10-Jul-2005
Posts: 9390
From: Unknown

Nice!

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NutsAboutAmiga 
Re: Sam460ex_setup released
Posted on 13-Jun-2012 18:41:52
#3 ]
Elite Member
Joined: 9-Jun-2004
Posts: 12344
From: Norway

Sound like this is going to help a lot.


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djrikki 
Re: Sam460ex_setup released
Posted on 13-Jun-2012 18:46:55
#4 ]
Elite Member
Joined: 22-Jun-2010
Posts: 2077
From: Grimsby, UK

Ran GFX2DBench and uploaded my results for a variety of 32-bit screen results.

Thanks for this release!


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Templario 
Re: Sam460ex_setup released
Posted on 13-Jun-2012 19:42:29
#5 ]
Elite Member
Joined: 22-Jun-2004
Posts: 3610
From: Unknown

Thanks for this new update!

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Toaks 
Re: Sam460ex_setup released
Posted on 14-Jun-2012 5:23:37
#6 ]
Elite Member
Joined: 10-Mar-2003
Posts: 8042
From: amigaguru.com

great update!!!


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KimmoK 
Re: Sam460ex_setup released
Posted on 14-Jun-2012 5:59:57
#7 ]
Elite Member
Joined: 14-Mar-2003
Posts: 5210
From: Ylikiiminki, Finland

Someone got a link to 2D bench results made with this latest setup tool?

(after 1 minute search I did not find these new results there)


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Crumb 
Re: Sam460ex_setup released
Posted on 14-Jun-2012 14:56:35
#8 ]
Elite Member
Joined: 12-Mar-2003
Posts: 2209
From: Zaragoza (Aragonian State)

I thought a PCIe based machine would be faster.
AGPx2 = 533MB/s
AGPx4 = 1066MB/s
AGPx8 = 2133MB/s

G5 have fast memory controller so it should not be problem to reach that 320MB/s value with or without AGP/PCIe DMA.

Keep in mind that in addition to the cpu you can also use DMA to copy data to gfx mem, so even a G4 based mac could move data between memory and gfx mem reaching the maximum speed allowed by ram (that would be higher than cpu to ram writes). That's why DDR&DDR2 are useful on G4 based machines, the cpu can't take full advantage of DDR&DDR2 but all the rest of hardware can, so you can have textures in ram that are copied to gfx mem without cpu intervention at the maximum speed allowed by ram controller.


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sicky 
Re: Sam460ex_setup released
Posted on 14-Jun-2012 17:12:10
#9 ]
Elite Member
Joined: 11-Mar-2003
Posts: 2843
From: Essex, UK

I have installed it, what happens next, somewhere I can test speeds?

My result

Last edited by sicky on 14-Jun-2012 at 07:31 PM.
Last edited by sicky on 14-Jun-2012 at 07:20 PM.
Last edited by sicky on 14-Jun-2012 at 07:19 PM.
Last edited by sicky on 14-Jun-2012 at 07:16 PM.
Last edited by sicky on 14-Jun-2012 at 07:14 PM.


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NutsAboutAmiga 
Re: Sam460ex_setup released
Posted on 14-Jun-2012 18:09:09
#10 ]
Elite Member
Joined: 9-Jun-2004
Posts: 12344
From: Norway

@Crumb

Well news items seams to suggest it depends on type of graphic card your using.
Big difference between theoretical values and measured / bench marked values.

Is not AGP GRANT sidebands hard to exploit fully.


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AmigaPapst 
Re: Sam460ex_setup released
Posted on 14-Jun-2012 18:31:46
#11 ]
Cult Member
Joined: 2-Nov-2003
Posts: 632
From: Amigavatikan

Nice update. Thanks Acube/Massimiliano Tretene.


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KimmoK 
Re: Sam460ex_setup released
Posted on 14-Jun-2012 19:49:05
#12 ]
Elite Member
Joined: 14-Mar-2003
Posts: 5210
From: Ylikiiminki, Finland

PCIe has theorethical 250MB/s per lane speed.
SAM460 has 4 lanes, so 1GB/sec theorethical.
(IIRC, it does PCIe v1, not v2)

It might be impossible to get near 1GB/sec by PPC460 CPU?
But perhaps with RAM to VRAM DMA transfer.

(similarly x1000 should one day reach 4GB/sec when DMA is used)


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Antique 
Re: Sam460ex_setup released
Posted on 14-Jun-2012 21:16:18
#13 ]
Cult Member
Joined: 8-Jun-2005
Posts: 887
From: Norway

As always, acube delivers.


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Rob 
Re: Sam460ex_setup released
Posted on 15-Jun-2012 3:45:48
#14 ]
Elite Member
Joined: 20-Mar-2003
Posts: 6219
From: S.Wales

Has anyone done before and after tests with ragemem to see what the video bus test reveals.

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ssolie 
Re: Sam460ex_setup released
Posted on 15-Jun-2012 16:00:25
#15 ]
Elite Member
Joined: 10-Mar-2003
Posts: 2755
From: Alberta, Canada

@Crumb
Quote:
Keep in mind that in addition to the cpu you can also use DMA to copy data...

Gosh, thanks for all the highly useful insights...

Last edited by ssolie on 15-Jun-2012 at 04:00 PM.


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