Messages in this thread | | | Date | Wed, 23 Dec 1998 20:00:16 +0100 | From | Dieter Nützel <> | Subject | K6-2-400 CXT (K6-3 core) / MTRR (write combining) |
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Hello,
I've greped this very nice ftp://ftp.heise.de/pub/ct/pcconfig/setk6v2.zip tool from the German's "c't" magazine's site (sorry, only for Winbloze) but hey, there must be someone out there who should hack this into the kernel?!!!!!!
I set this up with an Elsa VICTORY II (Banshee, AGP, 16 MB SGRAM) and got nearly 2.5 times for 2D graphics operation and a huge bus transfer speedup!!! It offers the same as the Pentium II does.
K6,K6/2,K6/2cxt-Utility, Andreas Stiller, c't V 1.1, Nov 98 Syntax: SetK6 /on .. set WA for all memory (found: 128 MByte) Syntax: SetK6 .. w/o parameter:displays actual configuration /on:Memorysize .. enable write allocation for memory [in MByte] /off .. disable write allocation SetK6 /M0:LFB,Size[,attr] Write combining for primary LFB SetK6 /M1:LFB2,Size[,attr] Write combining for second. LFB
CPUID : Typ=00 Fam=05 Mod=08 Step=0C Processor Name : AMD K6-2CXT Step 12, 401 MHz PCI Framebuffers : 1. E8000000, 2. EC000000
Fillrate with "Cold Cache": 88.5 MByte/s Write Allocation : enabled up to 128 MByte, no whole in 15 - 16M Write Combining for LFB : MTRR0=E8000000, Size: 16.0 MB, write combining Write Combining for LFB2 : MTRR1=EC000000, Size: 16.0 MB, write combining
Hans-Frieder Vogt posted in this list a nice patch for the K6-2's. http://www.linuxhq.com/lnxlists/linux-kernel/lk_9812_02/msg00742.html
Here comes a part of his mail: '...The K6-2 processor adds a bit for the SYSCALL/SYSRET instructions. The bit is now called "star" like in the AMD documentation...'
But, Where are these nice 'mtrr' flags?
This was 2.1.131-ac13 (Alan Cox) :-)
Linux version 2.1.131 (root@SunWave1) (gcc version pgcc-2.91.60 19981201 (egcs-1.1.1 release)) #1 Tue Dec 22 04:53:33 MET 1998 processor : 0 vendor_id : AuthenticAMD cpu family : 5 model : 8 model name : AMD-K6(tm) 3D processor stepping : 12 cpu MHz : 400.916027 fdiv_bug : no hlt_bug : no sep_bug : no f00f_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr mce cx8 sep pge mmx 3dnow bogomips : 799.54
Thanks and Mary Xmas.
Dieter
-- Dieter Nuetzel Graduate Student, Computer Science
University of Hamburg Department of Computer Science Cognitive Systems Group Vogt-Koelln-Strasse 30 22527 Hamburg, Germany
email: nuetzel@kogs.informatik.uni-hamburg.de
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