topic try the code from intel in Software Archive

Very slow page allocation

attila_afra — Tue, 07 Jan 2014 22:33:06 GMT

Memory allocation is very slow on the device because of the expensive page faults. I've measured a page fault handling speed of about 1 GB/s. This means that the allocation/registration of large buffers can take several seconds! Are there any plans to improve the efficiency of page allocation in the kernel? I think this is a quite significant performance issue.

Yes, this is a significant

TaylorIoTKidd — Tue, 28 Jan 2014 17:40:25 GMT

Yes, this is a significant performance issue. There are some optimizations in the MPSS 3.2 release scheduled for the later part of this quarter (Q1 2014), and there are more to come in further releases.

One of our experts suggests that you look at using mmap() with the MAP_POPULATE flag to force the pages to be prepopulated, avoiding later page faults.

Regards
--
Taylor

try the code from intel

Patrick_S_ — Tue, 28 Jan 2014 21:50:00 GMT

try the code sample from intel for mmap

in the attachment you can find the code.