Experimental Physics and
Industrial Control System

"Mark Rivers" <[email protected]> · Tue, 26 Jul 2011 06:34:50 -0500

The vxWorks "spy" (and "spyStop") commands are also very useful for seeing what tasks are using the CPU.

Mark

________________________________

From: [email protected] on behalf of Dalesio, Leo
Sent: Tue 7/26/2011 6:04 AM
To: Jay Steele; [email protected]
Subject: RE: question regarding VxStats-1-7-2h (doesn't seem to measure CPUloadproperly)

A state transition program that transitions to itself with no delays uses all CPU time that is at the SNL and lower priorities.
I do not recall if the Channel Access Client runs at a lower priority than the state notation engine.
I think that the vxStats gotten from vxWorks are computed in the idle task. That would mean that it would never run.
The better tool for finding this problem is to run the SNL diagnostic, seqShow "state set name".
The current state and the previous state would show the two states (or one if it is to itself), in the infinite loop. And the time in this state will always be zero - or very close to zero.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System