4 messages in org.opensolaris.mdb-discuss[mdb-discuss] [Fwd: [osol-code] Quest...
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Saurabh MisraAug 27, 2007 1:15 pm 
Oliver YangAug 27, 2007 6:57 pm 
Saurabh MisraAug 27, 2007 8:56 pm 
Oliver YangAug 28, 2007 12:43 am 
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Subject:[mdb-discuss] [Fwd: [osol-code] Questions about overdue callout_execute]Actions...
From:Saurabh Misra (Saur@Sun.COM)
Date:Aug 27, 2007 8:56:07 pm
List:org.opensolaris.mdb-discuss

Hi Saurabh, What I concerned is, although CPU0 BSPL is 6 as you said. But CPU1 is IDLE at time, why those pending softcall can't be dispatched to CPU1?

The problem is that siron uses global inum to generate level1 on a particular CPU. If level1 is already pending on CPU 0, CPU 1 wouldn't fire level1 using siron() because IV_PENDING flag would be set in interrupt vector table.

http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/sun4/ml/interrupt.s#1555

The other problem is that CPU 0 should poke CPU 1 to do softcall processing in this case which does not happen in the current implementation.

I think we are seeing some problem with e100g interrupt service routine as well. It's taking longer time than usual which creates this situation more often.

Thanks, /Saurabh