Re: [Xenomai-help] Unexpected preemption of highest priority

Re: [Xenomai-help] Unexpected preemption of highest priority

[Patrick Roberts]

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>>>     Stephen Bryant wrote:

>>>     > I've had a look at dmesg, but cannot find any references to SMI -

>> what

>>>     > should I be looking for?

>>>

>>>     What is described in the TROUBLESHOOTING file.

>>>

>>>

>>> I have tried disabling the SMI workaround, ensuring that SMI detection

>>> is not disabled, and logging the kernel output (setting the kernel log

>>> level to 8 in grub and sending the output to the serial port to be

>>> picked up by another machine). The troubleshooting file states that I

>>> should see "Xenomai: Intel chipset found and SMI workaround not

>>> enabled, you may encounter high interrupt latencies." in this output,

>>> however this does not occur - I am using an Intel Core 2 Duo but with

>>> SMP disabled, if this has any relevance.

>> The SMI detection/workaround is based on the chipset you have. If your

>> chipset is an ICH10, Stefan posted a patch a few days ago. If it is

>> another one, then please send us the result of lspci -vv on your target.

>>

>
> It seems to be ICH8, so the result is attached,

 I appear to have a similar problem to Stephen except have a different chip
set.
The output of lspci -vv:
"Intel Corporation 5 Series/3400 Series Chipset"
Any suggestions?  I assume that it is the SMI interrupts that are causing my
high latency.

Patrick

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