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Processor Load



On Tue, Sep 26, 2000 at 09:41:49AM -0500, Joel Sherrill wrote:
> The most accurate solution is to have a counter/time that is checked
> each time a task switch occurs.  Then the outgoing task is "charged"
> for the time spent executing.

Are there any hooks in the scheduler available where a BSP function can 
be called to read a high resolution free running clock, as it is available
in some modern processors?

For instance, the 8xx family has the TMBH/TMBL combo or the decrementer
register (the last one is common to all members of the PPC architecture),
which can be configured to run with a very high resolution (up to 
SYSCLOCK/4).

I already use that timer successfully to evaluate the behaviour of my 
device drivers.

gm