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| author | Stefano Brivio <stefano.brivio@polimi.it> | 2007-12-23 04:44:56 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 15:00:53 -0800 |
| commit | d439810bda5082e213c59c2aa8108ae4c0e520ef (patch) | |
| tree | a7c85a25644cd35c1ec8ea396da12c998e8ef2e8 | |
| parent | 13e05aa631b195ce30737b320da17e7542c82ead (diff) | |
| download | blackbird-op-linux-d439810bda5082e213c59c2aa8108ae4c0e520ef.tar.gz blackbird-op-linux-d439810bda5082e213c59c2aa8108ae4c0e520ef.zip | |
rc80211-pid: pf_target tuning
Set a better value for percentage target for failed frames. The previous value
slowed down too much rate increases in case of permanently low activity. While
at it, increase readability.
Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/mac80211/rc80211_pid.h | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/net/mac80211/rc80211_pid.h b/net/mac80211/rc80211_pid.h index 6afd3cebdeca..b98e16afe4d1 100644 --- a/net/mac80211/rc80211_pid.h +++ b/net/mac80211/rc80211_pid.h @@ -11,41 +11,41 @@ #define RC80211_PID_H /* Sampling period for measuring percentage of failed frames. */ -#define RC_PID_INTERVAL (HZ / 8) +#define RC_PID_INTERVAL (HZ / 8) /* Exponential averaging smoothness (used for I part of PID controller) */ -#define RC_PID_SMOOTHING_SHIFT 3 -#define RC_PID_SMOOTHING (1 << RC_PID_SMOOTHING_SHIFT) +#define RC_PID_SMOOTHING_SHIFT 3 +#define RC_PID_SMOOTHING (1 << RC_PID_SMOOTHING_SHIFT) /* Sharpening factor (used for D part of PID controller) */ -#define RC_PID_SHARPENING_FACTOR 0 -#define RC_PID_SHARPENING_DURATION 0 +#define RC_PID_SHARPENING_FACTOR 0 +#define RC_PID_SHARPENING_DURATION 0 /* Fixed point arithmetic shifting amount. */ -#define RC_PID_ARITH_SHIFT 8 +#define RC_PID_ARITH_SHIFT 8 /* Fixed point arithmetic factor. */ -#define RC_PID_ARITH_FACTOR (1 << RC_PID_ARITH_SHIFT) +#define RC_PID_ARITH_FACTOR (1 << RC_PID_ARITH_SHIFT) /* Proportional PID component coefficient. */ -#define RC_PID_COEFF_P 15 +#define RC_PID_COEFF_P 15 /* Integral PID component coefficient. */ -#define RC_PID_COEFF_I 9 +#define RC_PID_COEFF_I 9 /* Derivative PID component coefficient. */ -#define RC_PID_COEFF_D 15 +#define RC_PID_COEFF_D 15 /* Target failed frames rate for the PID controller. NB: This effectively gives * maximum failed frames percentage we're willing to accept. If the wireless * link quality is good, the controller will fail to adjust failed frames * percentage to the target. This is intentional. */ -#define RC_PID_TARGET_PF 11 +#define RC_PID_TARGET_PF 14 /* Rate behaviour normalization quantity over time. */ -#define RC_PID_NORM_OFFSET 3 +#define RC_PID_NORM_OFFSET 3 /* Push high rates right after loading. */ -#define RC_PID_FAST_START 0 +#define RC_PID_FAST_START 0 /* Arithmetic right shift for positive and negative values for ISO C. */ #define RC_PID_DO_ARITH_RIGHT_SHIFT(x, y) \ |
