Date: Tue, 9 Nov 1999 11:34:59 +0000 (GMT) From: Mark Powell <M.S.Powell@salford.ac.uk> To: freebsd-questions@freebsd.org Subject: Stress testing a machine with "make world" Message-ID: <Pine.BSF.4.05.9911091127380.20614-100000@localhost>
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We all know "make world" is a good acid test of whether a machine has
decent motherboard, RAM and disk subsystem. However, how far does one go?
And what is a good stress test of a machine with lots of RAM?
I've had a machine forced upon me, which is based on a Micro-Star 6119
motherboard. Never heard of them before, so I decided to test it out.
Handles a 3.3R "make world" fine, but will panic the kernel on a
"make -j60 world".
-----
IdlePTD 2711552
initial pcb at 2310b8
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x29a
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0174bef
stack pointer = 0x10:0xc78b5f30
frame pointer = 0x10:0xc7be8174
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 2 (pagedaemon)
interrupt mask =
trap number = 12
panic: page fault
syncing disks... 133 133 133 119 93 45 7 1 done
....
---
#0 boot (howto=Cannot access memory at address 0x20.
) at ../../kern/kern_shutdown.c:285
285 dumppcb.pcb_cr3 = rcr3();
---
These sort of errors are bad hardware?
This always happens when the machine has 128MB of RAM. If the RAM is
increased to 256MB, I can't get the "make world" to fail, even putting the
number of concurrent jobs up into the hundreds. I presume this is due to
it swapping less and not encountering the problems with the hardware? How
can one test such a machine without resorting to a "make -j100 world" on
each and even DIMM in turn?
Cheers.
Mark Powell - UNIX System Administrator - Clifford Whitworth Building
A.I.S., University of Salford, Salford, Manchester, UK.
Tel: +44 161 295 5936 Fax: +44 161 295 5888 www.pgp.com for PGP key
M.S.Powell@ais.salfrd.ac.uk (spell salford correctly to reply to me)
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