To th problem with mtrr (memory type range register) settings.
I am not a hardware guru but I have read
/usr/src/linux/Documentation/mtrr.txt which explains where mttr's are
good for.
I have an asus-p2b-ds board with 2 PII/350 on it and also have ..
mtrr: your CPUs had inconsistent fixed MTRR settings
mtrr: your CPUs had inconsistent variable MTRR settings
mtrr: probably your BIOS does not setup all CPUs
in my dmesg-output.
The message appears only when I set the video-memory-cache-mode
in my bios to uscw.
That means "uncacheable, speculative write combining" and "can improve
display speed by caching the display data" according to the handbook
of the motherboard.
The output of cat /proc/mtrr in this case looks ..
reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1
reg05: base=0xe3000000 (3632MB), size= 16MB: write-combining, count=1
16MB is the size of the RAM on my MATROX-G200 graphics-card and
the 512MB ist the size of RAM I have.
What the 3632MB mean is unclear to me, maybe memory-mapping of
graphics io-space.
I think with uscw the system uses write-combining transfers to the 16MB
of the graphics-card and uses the 512MB System-RAM with write-back
caching.
When I set video-memory-cache-mode to uc (uncacheable) the mttr-message
didn't occur and the output of cat /proc/mtrr looks ..
reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1
This looks to me as there is no write-combining to any memory region
enabled which corresponds fine to the BIOS setting.
In both cases the system runs fine and without any failure in X11.
But I can't feel any difference in display-speed on my most times
single-used system.
The problem (if there is one) looks as it will have been fixed by
the mtrr-routine.
The question is, is the error message right when it means this is a
failure of the BIOS or not ?
Can anybody (Richard Gooch ?) explain if this interpretation is ok
and why the message comes up ?
--
Klaus Dittrich
e-mail: [EMAIL PROTECTED]
PS.
Two dmesg outputs the first with uc-bios-setting and the secon with
uswc-bios-setting.
uc-bios-setting
---------------
Linux version 2.3.5 (root@df1tlpc) (gcc version egcs-2.91.66 19990314 (egcs-1.1.2
release)) #4 SMP Son Jun 20 18:30:16 MEST 1999
Intel MultiProcessor Specification v1.1
Virtual Wire compatibility mode.
OEM ID: OEM00000 Product ID: PROD00000000 APIC at: 0xFEE00000
Processor #1 Pentium(tm) Pro APIC version 17
Processor #0 Pentium(tm) Pro APIC version 17
I/O APIC #2 Version 17 at 0xFEC00000.
Processors: 2
mapped APIC to ffffe000 (fee00000)
mapped IOAPIC to ffffd000 (fec00000)
Detected 350802645 Hz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 349.80 BogoMIPS
Memory: 515212k/524224k available (1084k kernel code, 420k reserved, 7464k data, 44k
init)
Checking 386/387 coupling... OK, FPU using exception 16 error reporting.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.35 (19990512) Richard Gooch ([EMAIL PROTECTED])
per-CPU timeslice cutoff: 100.22 usecs.
CPU1: Intel Pentium II (Deschutes) stepping 02
calibrating APIC timer ...
..... CPU clock speed is 350.7911 MHz.
..... system bus clock speed is 100.2259 MHz.
Booting processor 0 eip 2000
Calibrating delay loop... 350.62 BogoMIPS
OK.
CPU0: Intel Pentium II (Deschutes) stepping 02
Total of 2 processors activated (700.42 BogoMIPS).
enabling symmetric IO mode... ...done.
ENABLING IO-APIC IRQs
init IO_APIC IRQs
IO-APIC pin 0, 5, 10, 11, 13, 17, 20, 21, 22, 23 not connected.
number of MP IRQ sources: 15.
number of IO-APIC registers: 24.
testing the IO APIC.......................
.... register #00: 02000000
....... : physical APIC id: 02
.... register #01: 00170011
....... : max redirection entries: 0017
....... : IO APIC version: 0011
.... register #02: 00000000
....... : arbitration: 00
.... IRQ redirection table:
NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
00 000 00 1 0 0 0 0 0 0 00
01 000 00 0 0 0 0 0 1 1 59
02 0FF 0F 0 0 0 0 0 1 1 51
03 000 00 0 0 0 0 0 1 1 61
04 000 00 0 0 0 0 0 1 1 69
05 000 00 1 0 0 0 0 0 0 00
06 000 00 0 0 0 0 0 1 1 71
07 000 00 0 0 0 0 0 1 1 79
08 000 00 0 0 0 0 0 1 1 81
09 000 00 0 0 0 0 0 1 1 89
0a 000 00 1 0 0 0 0 0 0 00
0b 000 00 1 0 0 0 0 0 0 00
0c 000 00 0 0 0 0 0 1 1 91
0d 000 00 1 0 0 0 0 0 0 00
0e 000 00 0 0 0 0 0 1 1 99
0f 000 00 0 0 0 0 0 1 1 A1
10 0FF 0F 1 1 0 1 0 1 1 A9
11 000 00 1 0 0 0 0 0 0 00
12 0FF 0F 1 1 0 1 0 1 1 B1
13 0FF 0F 1 1 0 1 0 1 1 B9
14 000 00 1 0 0 0 0 0 0 00
15 000 00 1 0 0 0 0 0 0 00
16 000 00 1 0 0 0 0 0 0 00
17 000 00 1 0 0 0 0 0 0 00
IRQ to pin mappings:
IRQ0 -> 2
IRQ1 -> 1
IRQ3 -> 3
IRQ4 -> 4
IRQ5 -> 19
IRQ6 -> 6
IRQ7 -> 7
IRQ8 -> 8
IRQ9 -> 9
IRQ10 -> 18
IRQ11 -> 16
IRQ12 -> 12
IRQ14 -> 14
IRQ15 -> 15
.................................... done.
PCI: PCI BIOS revision 2.10 entry at 0xf0730
PCI: Using configuration type 1
PCI: Probing PCI hardware
Linux NET4.0 for Linux 2.2
Based upon Swansea University Computer Society NET3.039
NET4: Unix domain sockets 1.0 for Linux NET4.0.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
TCP: Hash tables configured (established 524288 bind 524288)
Starting kswapd v 1.5
Detected PS/2 Mouse Port.
Serial driver version 4.27 with no serial options enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
Real Time Clock Driver v1.09
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
(scsi0) <Adaptec AIC-7890/1 Ultra2 SCSI host adapter> found at PCI 6/0
(scsi0) Wide Channel, SCSI ID=7, 32/255 SCBs
(scsi0) Downloading sequencer code... 407 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.10/3.2.4
<Adaptec AIC-7890/1 Ultra2 SCSI host adapter>
scsi : 1 host.
Vendor: SEAGATE Model: ST39173LW Rev: 6246
Type: Direct-Access ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 1, lun 0
(scsi0:0:1:0) Synchronous at 80.0 Mbyte/sec, offset 15.
Vendor: TOSHIBA Model: CD-ROM XM-6201TA Rev: 1037
Type: CD-ROM ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 6, lun 0
(scsi0:0:6:0) Synchronous at 10.0 Mbyte/sec, offset 16.
scsi : detected 1 SCSI cdrom 1 SCSI disk total.
Uniform CDROM driver Revision: 2.55
SCSI device sda: hdwr sector= 512 bytes. Sectors= 17783240 [8683 MB] [8.7 GB]
3c59x.c:v0.99H 11/17/98 Donald Becker
http://cesdis.gsfc.nasa.gov/linux/drivers/vortex.html
eth0: 3Com 3c905B Cyclone 100baseTx at 0xb800, 00:10:4b:6e:33:88, IRQ 10
8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate interface.
MII transceiver found at address 24, status 786d.
MII transceiver found at address 0, status 786d.
Enabling bus-master transmits and whole-frame receives.
Partition check:
sda: sda1 sda2 sda3
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 44k freed
Adding Swap: 130748k swap-space (priority -1)
cat /proc/mtrr output
reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1
uswc-bios-setting
-----------------
Linux version 2.3.5 (root@df1tlpc) (gcc version egcs-2.91.66 19990314 (egcs-1.1.2
release)) #4 SMP Son Jun 20 18:30:16 MEST 1999
Intel MultiProcessor Specification v1.1
Virtual Wire compatibility mode.
OEM ID: OEM00000 Product ID: PROD00000000 APIC at: 0xFEE00000
Processor #1 Pentium(tm) Pro APIC version 17
Processor #0 Pentium(tm) Pro APIC version 17
I/O APIC #2 Version 17 at 0xFEC00000.
Processors: 2
mapped APIC to ffffe000 (fee00000)
mapped IOAPIC to ffffd000 (fec00000)
Detected 350799293 Hz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 349.80 BogoMIPS
Memory: 515212k/524224k available (1084k kernel code, 420k reserved, 7464k data, 44k
init)
Checking 386/387 coupling... OK, FPU using exception 16 error reporting.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.35 (19990512) Richard Gooch ([EMAIL PROTECTED])
per-CPU timeslice cutoff: 100.22 usecs.
CPU1: Intel Pentium II (Deschutes) stepping 02
calibrating APIC timer ...
..... CPU clock speed is 350.8194 MHz.
..... system bus clock speed is 100.2339 MHz.
Booting processor 0 eip 2000
Calibrating delay loop... 350.62 BogoMIPS
OK.
CPU0: Intel Pentium II (Deschutes) stepping 02
Total of 2 processors activated (700.42 BogoMIPS).
enabling symmetric IO mode... ...done.
ENABLING IO-APIC IRQs
init IO_APIC IRQs
IO-APIC pin 0, 5, 10, 11, 13, 17, 20, 21, 22, 23 not connected.
number of MP IRQ sources: 15.
number of IO-APIC registers: 24.
testing the IO APIC.......................
.... register #00: 02000000
....... : physical APIC id: 02
.... register #01: 00170011
....... : max redirection entries: 0017
....... : IO APIC version: 0011
.... register #02: 00000000
....... : arbitration: 00
.... IRQ redirection table:
NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
00 000 00 1 0 0 0 0 0 0 00
01 000 00 0 0 0 0 0 1 1 59
02 0FF 0F 0 0 0 0 0 1 1 51
03 000 00 0 0 0 0 0 1 1 61
04 000 00 0 0 0 0 0 1 1 69
05 000 00 1 0 0 0 0 0 0 00
06 000 00 0 0 0 0 0 1 1 71
07 000 00 0 0 0 0 0 1 1 79
08 000 00 0 0 0 0 0 1 1 81
09 000 00 0 0 0 0 0 1 1 89
0a 000 00 1 0 0 0 0 0 0 00
0b 000 00 1 0 0 0 0 0 0 00
0c 000 00 0 0 0 0 0 1 1 91
0d 000 00 1 0 0 0 0 0 0 00
0e 000 00 0 0 0 0 0 1 1 99
0f 000 00 0 0 0 0 0 1 1 A1
10 0FF 0F 1 1 0 1 0 1 1 A9
11 000 00 1 0 0 0 0 0 0 00
12 0FF 0F 1 1 0 1 0 1 1 B1
13 0FF 0F 1 1 0 1 0 1 1 B9
14 000 00 1 0 0 0 0 0 0 00
15 000 00 1 0 0 0 0 0 0 00
16 000 00 1 0 0 0 0 0 0 00
17 000 00 1 0 0 0 0 0 0 00
IRQ to pin mappings:
IRQ0 -> 2
IRQ1 -> 1
IRQ3 -> 3
IRQ4 -> 4
IRQ5 -> 19
IRQ6 -> 6
IRQ7 -> 7
IRQ8 -> 8
IRQ9 -> 9
IRQ10 -> 18
IRQ11 -> 16
IRQ12 -> 12
IRQ14 -> 14
IRQ15 -> 15
.................................... done.
mtrr: your CPUs had inconsistent fixed MTRR settings
mtrr: your CPUs had inconsistent variable MTRR settings
mtrr: probably your BIOS does not setup all CPUs
PCI: PCI BIOS revision 2.10 entry at 0xf0730
PCI: Using configuration type 1
PCI: Probing PCI hardware
Linux NET4.0 for Linux 2.2
Based upon Swansea University Computer Society NET3.039
NET4: Unix domain sockets 1.0 for Linux NET4.0.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
TCP: Hash tables configured (established 524288 bind 524288)
Starting kswapd v 1.5
Detected PS/2 Mouse Port.
Serial driver version 4.27 with no serial options enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
Real Time Clock Driver v1.09
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
(scsi0) <Adaptec AIC-7890/1 Ultra2 SCSI host adapter> found at PCI 6/0
(scsi0) Wide Channel, SCSI ID=7, 32/255 SCBs
(scsi0) Downloading sequencer code... 407 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.10/3.2.4
<Adaptec AIC-7890/1 Ultra2 SCSI host adapter>
scsi : 1 host.
Vendor: SEAGATE Model: ST39173LW Rev: 6246
Type: Direct-Access ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 1, lun 0
(scsi0:0:1:0) Synchronous at 80.0 Mbyte/sec, offset 15.
Vendor: TOSHIBA Model: CD-ROM XM-6201TA Rev: 1037
Type: CD-ROM ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 6, lun 0
(scsi0:0:6:0) Synchronous at 10.0 Mbyte/sec, offset 16.
scsi : detected 1 SCSI cdrom 1 SCSI disk total.
Uniform CDROM driver Revision: 2.55
SCSI device sda: hdwr sector= 512 bytes. Sectors= 17783240 [8683 MB] [8.7 GB]
3c59x.c:v0.99H 11/17/98 Donald Becker
http://cesdis.gsfc.nasa.gov/linux/drivers/vortex.html
eth0: 3Com 3c905B Cyclone 100baseTx at 0xb800, 00:10:4b:6e:33:88, IRQ 10
8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate interface.
MII transceiver found at address 24, status 786d.
MII transceiver found at address 0, status 786d.
Enabling bus-master transmits and whole-frame receives.
Partition check:
sda: sda1 sda2 sda3
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 44k freed
Adding Swap: 130748k swap-space (priority -1)
cat /proc/mtrr output
reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1
reg05: base=0xe3000000 (3632MB), size= 16MB: write-combining, count=1
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