tree 4f35966cb4e1018b05c87d7a10c337d888949e22
parent 5dcc03fe29537edd7819f5b121bf3d779693f37b
author Bruno Randolf <br1@einfach.org> 1291287037 +0900
committer John W. Linville <linville@tuxdriver.com> 1291669123 -0500

lib: Improve EWMA efficiency by using bitshifts

Using bitshifts instead of division and multiplication should improve
performance. That requires weight and factor to be powers of two, but i think
this is something we can live with.

Thanks to Peter Zijlstra for the improved formula!

Signed-off-by: Bruno Randolf <br1@einfach.org>

--

v2:	use log2.h functions
Signed-off-by: John W. Linville <linville@tuxdriver.com>