17 Jan, 2014
1 commit
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To ensure ewma_read() without a lock returns a valid but possibly
out of date average, modify ewma_add() by using ACCESS_ONCE to prevent
intermediate wrong values from being written to avg->internal.Suggested-by: Eric Dumazet
Acked-by: Michael S. Tsirkin
Acked-by: Eric Dumazet
Signed-off-by: Michael Dalton
Signed-off-by: David S. Miller
08 Mar, 2012
1 commit
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For files only using THIS_MODULE and/or EXPORT_SYMBOL, map
them onto including export.h -- or if the file isn't even
using those, then just delete the include. Fix up any implicit
include dependencies that were being masked by module.h along
the way.Signed-off-by: Paul Gortmaker
07 Dec, 2010
1 commit
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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
--
v2: use log2.h functions
Signed-off-by: John W. Linville
19 Nov, 2010
1 commit
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This adds generic functions for calculating Exponentially Weighted Moving
Averages (EWMA). This implementation makes use of a structure which keeps the
EWMA parameters and a scaled up internal representation to reduce rounding
errors.The original idea for this implementation came from the rt2x00 driver
(rt2x00link.c). I would like to use it in several places in the mac80211 and
ath5k code and I hope it can be useful in many other places in the kernel code.Signed-off-by: Bruno Randolf
Reviewed-by: KOSAKI Motohiro
Signed-off-by: John W. Linville