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Why would i.MX53 context switch be slow?

Question asked by Robert Daniels on May 18, 2015
Latest reply on Jun 19, 2015 by Fabio Estevam

I've recently noticed that there is a large difference between the context switch times on the i.MX53 QSB and our own device based on the i.MX53.  Our device is 4-5 times slower as measured with lat_ctx described in this post: http://www.pengutronix.de/development/kernel/arm-benchmarks-20100729_en.html

 

Because I see better performance on the QSB, I am wondering if I have something misconfigured somewhere on my board but I do not really know where to look.  What kernel configuration options could affect context switch performance?  Where should I look to track this issue down?

 

Thanks!

 

Robert Daniels

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