Reduced java/tomcat performance 6-beta3 -> 6-stable ?

[Eirik Øverby]

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
>
> _______________________________________________
> freebsd-stable at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to "freebsd-stable- 
> unsubscribe at freebsd.org"
>
>