Re: change in sched cpu_power causing regressions with SCHED_MC

[Suresh Siddha]

On Sat, 2010-02-13 at 10:37 -0800, Vaidyanathan Srinivasan wrote:
> * Peter Zijlstra <peterz@xxxxxxxxxxxxx> [2010-02-13 11:42:04]:
> > BTW, do you think its possible to automate such test cases and put them
> > in a test-suite?
> 
> Linux Test Project (LTP) has some test cases for sched_mc/smt
> balancing. 

It is very unfortunate that neither this nor Linux-kernel performance
tests that Yanmin and co tracks has caught these problems much before.
Ling Ma's focused tests/analysis for something else started showing
these basic issues.

> They can be improved and generalized to include all basic
> scheduler task placement checks.  

Probably it is best if we can include the very basic checks/tests in the
kernel itself. More focused and extensive tests can be done outside the
kernel.

thanks,
suresh

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