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List:       dri-patches
Subject:    [Dri-patches] [ dri-Bugs-582729 ] MTRR grabs in 8k chunks
From:       noreply () sourceforge ! net
Date:       2002-07-17 8:44:54
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Bugs item #582729, was opened at 2002-07-17 01:44
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100387&aid=582729&group_id=387

Category: TDFX X Server
Group: Other
Status: Open
Resolution: None
Priority: 5
Submitted By: Keith Dart (kdart)
Assigned to: Nobody/Anonymous (nobody)
Summary: MTRR grabs in 8k chunks

Initial Comment:
When I start X/DRI (4.2/latest DRI).. the server tries
to grab MANY 8kb ranges of MTRR. But as you know there
are only a few, so the fast majority of the attempts fail. 

(WW) TDFX(0): Failed to set up write-combining range
(0xf0008000,0x1d6e000)
(WW) TDFX(0): Failed to set up write-combining range
(0xf0006000,0x1d70000)
(WW) TDFX(0): Failed to set up write-combining range
(0xf0004000,0x1d72000)
(WW) TDFX(0): Failed to set up write-combining range
(0xf0002000,0x1d74000)
(WW) TDFX(0): Failed to set up write-combining range
(0xf0000000,0x1d76000)

Above is the tail end of a long list of them,  from
part of my startup  status.

cat /proc/mtrr:

reg00: base=0x00000000 (   0MB), size= 256MB:
write-back, count=1
reg01: base=0xf1d74000 (3869MB), size=   8KB:
write-combining, count=1
reg02: base=0xf1d72000 (3869MB), size=   8KB:
write-combining, count=1
reg03: base=0xf1d70000 (3869MB), size=   8KB:
write-combining, count=1
reg04: base=0xf1d6e000 (3869MB), size=   8KB:
write-combining, count=1
reg05: base=0xf1d6c000 (3869MB), size=   8KB:
write-combining, count=1
reg06: base=0xf1d6a000 (3869MB), size=   8KB:
write-combining, count=1
reg07: base=0xf1d68000 (3869MB), size=   8KB:
write-combining, count=1

It used to grab only a few of those, many months ago. 

needless to say, my OpenGL apps run much slower this
way. They used to run faster with the "stock" XFree86
4.2 build. 


Also, I experience frequent system hangs when running
OpenGL apps (mainly Heretic II). 


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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100387&aid=582729&group_id=387


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