[Pvfs2-developers] memory allocations in BMI

kyle schochenmaier kschoche at scl.ameslab.gov
Fri Dec 22 16:45:23 EST 2006


Pete -

We stumbled across some hardware issues/limitations with our IB  
hardware, and have 'devised' a way of working around these  
limitations by increasing the sizes of memory region allocations  
inside BMI, currently we're seeing chunks or blocks of 64KB being  
allocated on the hardware level (this is what the firmware people  
show us is allocated physically)
Is there a way we can tune these allocation calls to the IB drivers,  
it should increase our ability to make large pinning requests if we  
can use larger than 64KB, they suggest 2MB.

Are you aware of any specific memory region sizes that are allocated  
in the BMI-IB layers?

+=Kyle


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