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Content-Type: TEXT/PLAIN; charset=US-ASCII
On my Dual Pentium 166 MHz machine running SMP, I have discovered a
repeatable problem. It is possible to make it just STOP! No errors
no obvious problems. After it stops, there is no response to the keyboard,
nothing at all. The CPUs __seem__ to be halted with the interrupts off.
This is evident by the chip temperature rapidly returning to room temperature.
There is no bus activity except for an approximate 26 us CAS for refresh.
I have been running various "torture" tests on the SMP machine. The test that
will cause it to halt is a "database" test that is attached (it's a small
compressed tar file).
Using the included script "cont", I execute 3 copies of the database program.
The CPU will halt after about 20 seconds.
This is the SCSI driver. No external drives are attached, and the internal
drives are connected with a SHORT cable properly terminated on the far end.
The controller is set for "auto termination" on its end. This has been
shown to be reliable. My previous external cables were not, even though
they were properly terminated, etc. This SCSI Controller sucks and will not
properly drive normal length cables.
Adaptec AIC7xxx driver version: 4.0/3.2/4.0
Compile Options:
AIC7XXX_RESET_DELAY : 5
AIC7XXX_CMDS_PER_LUN : 8
AIC7XXX_TWIN_SUPPORT : Enabled
AIC7XXX_TAGGED_QUEUEING: Enabled
AIC7XXX_PAGE_ENABLE : Enabled
AIC7XXX_PROC_STATS : Disabled
Adapter Configuration:
SCSI Adapter: AHA-2940
(AIC-787x chipset)
Host Bus: Single
Base IO: 0x6000
IRQ: 11
SCBs: Used 24, HW 16, Page 255
Interrupts: 54692
Serial EEPROM: True
Extended Translation: Disabled
SCSI Bus Reset: Enabled
Ultra SCSI: Disabled
Target Disconnect: Enabled
The current version.
Linux quark 2.1.27 #2 Thu Feb 27 11:36:56 EST 1997 i586
CPU info. Both processors are identical.
processor : 0
cpu : 586
model : Pentium 75+
vendor_id : GenuineIntel
stepping : 12
fdiv_bug : no
hlt_bug : no
fpu : yes
fpu_exception : yes
cpuid : yes
wp : yes
flags : fpu vme de pse tsc msr mce cx8 apic
bogomips : 66.36
processor : 1
cpu : 586
model : Pentium 75+
vendor_id : GenuineIntel
stepping : 12
fdiv_bug : no
hlt_bug : no
fpu : yes
fpu_exception : yes
cpuid : yes
wp : yes
flags : fpu vme de pse tsc msr mce cx8 apic
bogomips : 66.36
Memory.
total: used: free: shared: buffers: cached:
Mem: 47886336 46473216 1413120 6885376 34312192 2957312
Swap: 102752256 155648 102596608
MemTotal: 46764 kB
MemFree: 1380 kB
MemShared: 6724 kB
Buffers: 33508 kB
Cached: 2888 kB
SwapTotal: 100344 kB
SwapFree: 100192 kB
Cheers,
Dick Johnson
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Richard B. Johnson
Project Engineer
Analogic Corporation
Voice : (508) 977-3000 ext. 3754
Fax : (508) 532-6097
Modem : (508) 977-6870
Ftp : ftp@boneserver.analogic.com
Email : rjohnson@analogic.com, johnson@analogic.com
Penguin : Linux version 2.1.27 on an i586 machine (66.15 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
---1295196120-1220635433-857400179=:265
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