On Sun, Oct 27, 2002 at 01:44:26AM -0400, Mark Hahn wrote:
> > raid5: measuring checksumming speed
> > - 8regs : 2343.600 MB/sec
...
> > -raid5: using function: pIII_sse (4163.600 MB/sec)
> > + 8regs : 228.400 MB/sec
...
> > +raid5: using function: pIII_sse (352.000 MB/sec)
> caching is disabled.
That was what it looked like to me, but I read in the FAQ I shouldn't jump
to conclusions. :)
> > What could be causing this? I believe it is a kernel issue because
> > memtest86 reports realistic memory bandwidths (about 590MB/s).
> 590 MB/s is quite low. but I believe memtest86 also explicitly manages
> cache and mtrr's.
It does. With 'realistic' I meant it's on the same order of magnitude as
with the other MB.
> > reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1
> I wonder if it's lying.
How can I find out? (Well, it sure looks like it's lying, so there's little
point in going to great lengths to confirm it; but why does it lie?)
> > +ACPI: Thermal Zone found
> any idea whether the CPU is hot? (ie, there's usually a temp monitoring
> screen in the bios.)
It's not. Never seen it go above 40 degrees Celsius (about 104 Fahrenheit).
On Sun, Oct 27, 2002 at 08:53:46AM +0100, Willy Tarreau wrote:
> > What could be causing this? I believe it is a kernel issue because
> > memtest86 reports realistic memory bandwidths (about 590MB/s).
> does memtest86 report high speeds for the L2 cache ?
Over 3000MB/s for L2 and over 9000MB/s for L1. (I can't check exactly right
now.)
> I don't know if a buggy bios can slow it down that much, but that could
> explain your problem.
To me, everything looks right in memtest86. The values are slightly higher
than with the old MB.
> you can also take a look at /proc/interrupts to see if one source (NMI,
> machine check...) is bombing (ie more than tens of thousands/sec), thus
> letting no more time for other operations.
Sorry, I meant to include that in my original post. Here goes (without APIC):
CPU0
0: 3657439 XT-PIC timer
1: 2 XT-PIC keyboard
2: 0 XT-PIC cascade
5: 1187394 XT-PIC eth1, eth2
8: 3 XT-PIC rtc
9: 0 XT-PIC acpi
10: 245852 XT-PIC ide2, ide3
11: 461019 XT-PIC eth3
12: 86306 XT-PIC eth0
14: 3 XT-PIC ide0
NMI: 0
ERR: 0
This is after 10 hours of uptime (with load continually in excess of 20). It
doesn't look suspicious to me. I could probably shuffle eth1 and eth2 around
so they don't share IRQs, but that wouldn't make much of a difference, I
think.
Andrew
Ps. Please keep Cc:ing me with replies, if it's not too much trouble.
--
Andrew Korn (Korn Andras) <korn at chardonnay.math.bme.hu>
Finger korn at chardonnay.math.bme.hu for pgp key. QOTD:
Why did Kamikaze pilots wear helmets?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Oct 31 2002 - 22:00:33 EST