Update: The diff below was made after making sure both systems are
running the exact same kernel. Behavior is the same. Building new
kernels (6-STABLE) now to get out of the BETA stage.
/Eirik
On Nov 28, 2005, at 22:53 , Eirik Øverby wrote:
Firmware versions are equal. BIOS settings are equal.
However, a diff of the dmesgs show (apart from MAC address
differences):
30c30
< Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000
---
> Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
What on earth is that all about? The "slow" box has the ACPI-fast
timecounter...
/Eirik
On Nov 28, 2005, at 22:14 , Kris Kennaway wrote:
On Mon, Nov 28, 2005 at 09:54:30PM +0100, Eirik ?verby wrote:
Hi,
I think I have found the culprit. There must be some sort of
difference between the machines after all (BIOS revision?), because
while on one machine the interrupt rate for the bge card stays very
low (2 to be exact) during maximum load, the other machine goes
beyond 1000 and keeps rising constantly. This might also explain why
performance slowly degrades over time on that machine, and response
times vary wildly, while the "fast" machine responds nicely within
1-2 seconds no matter the load and testing time.
I will have to investigate this more closely. Is there a way to
force
the NIC to polling mode (I'm assuming that is the difference, an IRQ
rate of 2 is too low for a heavily loaded server if the NIC is
interrupt-driven)?
Anything else I could look at?
BIOS update.
Kris
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