On 3/22/07, Gerrit Renker <gerrit@xxxxxxxxxxxxxx> wrote:
[CCID 3]: Macro for moving average
The moving average computation occurs so frequently in the CCID 3 code that
it merits a macro of its own.
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
---
net/dccp/ccids/ccid3.c | 8 +++-----
net/dccp/ccids/lib/tfrc.h | 8 ++++++++
2 files changed, 11 insertions(+), 5 deletions(-)
--- a/net/dccp/ccids/lib/tfrc.h
+++ b/net/dccp/ccids/lib/tfrc.h
@@ -37,6 +37,14 @@ static inline u32 scaled_div32(u64 a, u3
return result;
}
+/**
+ * Macro for exponentially weighted moving average
+ * @weight: Weight to be used as damping factor, in units of 1/10
+ * Beware that @val is evaluated multiple times.
+ */
+#define TFRC_EWMA(val, newval, weight) \
+ val = val? ((weight) * val + (10 - (weight)) * (newval)) / 10 : (newval)
+
Just wondering why you pass weight when you only use 9 anyway and it
just adds a step. Is it used in following patches with a different
weight?
Ian
--
Web: http://wand.net.nz/~iam4
Blog: http://iansblog.jandi.co.nz
WAND Network Research Group
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