>From Wei YIN <Wei.Yin@xxxxxxxxxxxx>
Improve PID rate control mechanism by avoiding rate oscillation problem
Signed-off-by: Wei YIN <Wei.Yin@xxxxxxxxxxxx>
---
kernel 3.3.0
net/mac80211/rc80211_pid.h | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+), 0 deletions(-)
--- wireless-testing_orig/net/mac80211/rc80211_pid.h 2012-02-17 13:59:53.403182811 +1000
+++ wireless-testing/net/mac80211/rc80211_pid.h 2012-03-08 14:07:49.775694466 +1000
@@ -1,6 +1,7 @@
/*
* Copyright 2007, Mattias Nissler <mattias.nissler@xxxxxx>
* Copyright 2007, Stefano Brivio <stefano.brivio@xxxxxxxxx>
+ * Copyright 2012, Wei Yin, National ICT Australia <Wei.Yin@xxxxxxxxxxxx>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -24,6 +25,9 @@
/* Fixed point arithmetic shifting amount. */
#define RC_PID_ARITH_SHIFT 8
+/* Fixed point arithmetic factor. */
+#define RC_PID_ARITH_FACTOR (1 << RC_PID_ARITH_SHIFT)
+
/* Proportional PID component coefficient. */
#define RC_PID_COEFF_P 15
/* Integral PID component coefficient. */
@@ -48,6 +52,10 @@
#define RC_PID_DO_ARITH_RIGHT_SHIFT(x, y) \
((x) < 0 ? -((-(x)) >> (y)) : (x) >> (y))
+#define MAXPROBES 3
+#define TDIFS 34
+#define TSLOT 9
+
enum rc_pid_event_type {
RC_PID_EVENT_TYPE_TX_STATUS,
RC_PID_EVENT_TYPE_RATE_CHANGE,
@@ -118,6 +126,11 @@ struct rc_pid_events_file_info {
unsigned int next_entry;
};
+struct rc_pid_debugfs_info {
+ size_t len;
+ char buf[];
+};
+
/**
* struct rc_pid_debugfs_entries - tunable parameters
*
@@ -169,6 +182,11 @@ void rate_control_pid_add_sta_debugfs(vo
void rate_control_pid_remove_sta_debugfs(void *priv, void *priv_sta);
+int pid_stats_open(struct inode *inode, struct file *file);
+ssize_t pid_stats_read(struct file *file, char __user *buf, size_t len,
+ loff_t *ppos);
+int pid_stats_release(struct inode *inode, struct file *file);
+
struct rc_pid_sta_info {
unsigned long last_change;
unsigned long last_sample;
@@ -219,6 +237,16 @@ struct rc_pid_sta_info {
/* Events debugfs file entry */
struct dentry *events_entry;
+
+ int last_dlr;
+ int fail_probes;
+ int probes;
+ int monitoring;
+ int oldrate;
+ int n_rates;
+ int tmp_rate_idx;
+ int probe_cnt;
+ struct rc_pid_rateinfo *rinfo;
#endif
};
@@ -238,6 +266,16 @@ struct rc_pid_rateinfo {
/* Comparison with the lowest rate. */
int diff;
+
+ int bitrate;
+ int perfect_tx_time;
+ unsigned int throughput;
+ unsigned int this_attempt;
+ unsigned int this_success;
+ unsigned int this_fail;
+ unsigned long attempt;
+ unsigned long success;
+ unsigned long fail;
};
struct rc_pid_info {
--
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