diff options
| -rw-r--r-- | net/mac80211/rc80211_pid.h | 23 | ||||
| -rw-r--r-- | net/mac80211/rc80211_pid_algo.c | 112 |
2 files changed, 110 insertions, 25 deletions
diff --git a/net/mac80211/rc80211_pid.h b/net/mac80211/rc80211_pid.h index 5d0056c..425eb70 100644 --- a/net/mac80211/rc80211_pid.h +++ b/net/mac80211/rc80211_pid.h @@ -119,6 +119,20 @@ struct rc_pid_events_file_info { unsigned int next_entry; }; +struct rc_pid_debugfs_entries { + struct dentry *dir; + struct dentry *target; + struct dentry *sampling_period; + struct dentry *coeff_p; + struct dentry *coeff_i; + struct dentry *coeff_d; + struct dentry *smoothing_shift; + struct dentry *sharpen_factor; + struct dentry *sharpen_duration; + struct dentry *norm_offset; + struct dentry *fast_start; +}; + void rate_control_pid_event_tx_status(struct rc_pid_event_buffer *buf, struct ieee80211_tx_status *stat); @@ -222,8 +236,8 @@ struct rc_pid_info { /* Exponential averaging shift. */ unsigned int smoothing_shift; - /* Sharpening shift and duration. */ - unsigned int sharpen_shift; + /* Sharpening factor and duration. */ + unsigned int sharpen_factor; unsigned int sharpen_duration; /* Normalization offset. */ @@ -237,6 +251,11 @@ struct rc_pid_info { /* Index of the last used rate. */ int oldrate; + +#ifdef CONFIG_MAC80211_DEBUGFS + /* Debugfs entries created for the parameters above. */ + struct rc_pid_debugfs_entries dentries; +#endif }; #endif /* RC80211_PID_H */ diff --git a/net/mac80211/rc80211_pid_algo.c b/net/mac80211/rc80211_pid_algo.c index 3fac3a5..631e468 100644 --- a/net/mac80211/rc80211_pid_algo.c +++ b/net/mac80211/rc80211_pid_algo.c @@ -139,19 +139,20 @@ static void rate_control_pid_adjust_rate(struct ieee80211_local *local, } /* Normalize the failed frames per-rate differences. */ -static void rate_control_pid_normalize(struct rc_pid_rateinfo *r, int l) +static void rate_control_pid_normalize(struct rc_pid_info *pinfo, int l) { - int i; + int i, norm_offset = pinfo->norm_offset; + struct rc_pid_rateinfo *r = pinfo->rinfo; - if (r[0].diff > RC_PID_NORM_OFFSET) - r[0].diff -= RC_PID_NORM_OFFSET; - else if (r[0].diff < -RC_PID_NORM_OFFSET) - r[0].diff += RC_PID_NORM_OFFSET; + if (r[0].diff > norm_offset) + r[0].diff -= norm_offset; + else if (r[0].diff < -norm_offset) + r[0].diff += norm_offset; for (i = 0; i < l - 1; i++) - if (r[i + 1].diff > r[i].diff + RC_PID_NORM_OFFSET) - r[i + 1].diff -= RC_PID_NORM_OFFSET; + if (r[i + 1].diff > r[i].diff + norm_offset) + r[i + 1].diff -= norm_offset; else if (r[i + 1].diff <= r[i].diff) - r[i + 1].diff += RC_PID_NORM_OFFSET; + r[i + 1].diff += norm_offset; } static void rate_control_pid_sample(struct rc_pid_info *pinfo, @@ -163,18 +164,22 @@ static void rate_control_pid_sample(struct rc_pid_info *pinfo, struct ieee80211_hw_mode *mode; u32 pf; s32 err_avg; - s32 err_prop; - s32 err_int; - s32 err_der; + u32 err_prop; + u32 err_int; + u32 err_der; int adj, i, j, tmp; + unsigned long period; mode = local->oper_hw_mode; spinfo = sta->rate_ctrl_priv; /* In case nothing happened during the previous control interval, turn * the sharpening factor on. */ - if (jiffies - spinfo->last_sample > 2 * RC_PID_INTERVAL) - spinfo->sharp_cnt = RC_PID_SHARPENING_DURATION; + period = (HZ * pinfo->sampling_period + 500) / 1000; + if (!period) + period = 1; + if (jiffies - spinfo->last_sample > 2 * period) + spinfo->sharp_cnt = pinfo->sharpen_duration; spinfo->last_sample = jiffies; @@ -202,17 +207,17 @@ static void rate_control_pid_sample(struct rc_pid_info *pinfo, rinfo[j].diff = rinfo[i].diff + tmp; pinfo->oldrate = sta->txrate; } - rate_control_pid_normalize(rinfo, mode->num_rates); + rate_control_pid_normalize(pinfo, mode->num_rates); /* Compute the proportional, integral and derivative errors. */ - err_prop = RC_PID_TARGET_PF - pf; + err_prop = pinfo->target - pf; - err_avg = spinfo->err_avg_sc >> RC_PID_SMOOTHING_SHIFT; + err_avg = spinfo->err_avg_sc >> pinfo->smoothing_shift; spinfo->err_avg_sc = spinfo->err_avg_sc - err_avg + err_prop; - err_int = spinfo->err_avg_sc >> RC_PID_SMOOTHING_SHIFT; + err_int = spinfo->err_avg_sc >> pinfo->smoothing_shift; - err_der = pf - spinfo->last_pf - * (1 + RC_PID_SHARPENING_FACTOR * spinfo->sharp_cnt); + err_der = (pf - spinfo->last_pf) * + (1 + pinfo->sharpen_factor * spinfo->sharp_cnt); spinfo->last_pf = pf; if (spinfo->sharp_cnt) spinfo->sharp_cnt--; @@ -241,6 +246,7 @@ static void rate_control_pid_tx_status(void *priv, struct net_device *dev, struct rc_pid_info *pinfo = priv; struct sta_info *sta; struct rc_pid_sta_info *spinfo; + unsigned long period; sta = sta_info_get(local, hdr->addr1); @@ -285,7 +291,10 @@ static void rate_control_pid_tx_status(void *priv, struct net_device *dev, sta->tx_num_mpdu_fail += status->retry_count; /* Update PID controller state. */ - if (time_after(jiffies, spinfo->last_sample + RC_PID_INTERVAL)) + period = (HZ * pinfo->sampling_period + 500) / 1000; + if (!period) + period = 1; + if (time_after(jiffies, spinfo->last_sample + period)) rate_control_pid_sample(pinfo, local, sta); sta_info_put(sta); @@ -343,6 +352,9 @@ static void *rate_control_pid_alloc(struct ieee80211_local *local) struct ieee80211_hw_mode *mode; int i, j, tmp; bool s; +#ifdef CONFIG_MAC80211_DEBUGFS + struct rc_pid_debugfs_entries *de; +#endif pinfo = kmalloc(sizeof(*pinfo), GFP_ATOMIC); if (!pinfo) @@ -363,10 +375,10 @@ static void *rate_control_pid_alloc(struct ieee80211_local *local) for (i = 0; i < mode->num_rates; i++) { rinfo[i].index = i; rinfo[i].rev_index = i; - if (RC_PID_FAST_START) + if (pinfo->fast_start) rinfo[i].diff = 0; else - rinfo[i].diff = i * RC_PID_NORM_OFFSET; + rinfo[i].diff = i * pinfo->norm_offset; } for (i = 1; i < mode->num_rates; i++) { s = 0; @@ -385,18 +397,72 @@ static void *rate_control_pid_alloc(struct ieee80211_local *local) } pinfo->target = RC_PID_TARGET_PF; + pinfo->sampling_period = RC_PID_INTERVAL; pinfo->coeff_p = RC_PID_COEFF_P; pinfo->coeff_i = RC_PID_COEFF_I; pinfo->coeff_d = RC_PID_COEFF_D; + pinfo->smoothing_shift = RC_PID_SMOOTHING_SHIFT; + pinfo->sharpen_factor = RC_PID_SHARPENING_FACTOR; + pinfo->sharpen_duration = RC_PID_SHARPENING_DURATION; + pinfo->norm_offset = RC_PID_NORM_OFFSET; + pinfo->fast_start = RC_PID_FAST_START; pinfo->rinfo = rinfo; pinfo->oldrate = 0; +#ifdef CONFIG_MAC80211_DEBUGFS + de = &pinfo->dentries; + de->dir = debugfs_create_dir("rc80211_pid", + local->hw.wiphy->debugfsdir); + de->target = debugfs_create_u32("target_pf", S_IRUSR | S_IWUSR, + de->dir, &pinfo->target); + de->sampling_period = debugfs_create_u32("sampling_period", + S_IRUSR | S_IWUSR, de->dir, + &pinfo->sampling_period); + de->coeff_p = debugfs_create_u32("coeff_p", S_IRUSR | S_IWUSR, + de->dir, &pinfo->coeff_p); + de->coeff_i = debugfs_create_u32("coeff_i", S_IRUSR | S_IWUSR, + de->dir, &pinfo->coeff_i); + de->coeff_d = debugfs_create_u32("coeff_d", S_IRUSR | S_IWUSR, + de->dir, &pinfo->coeff_d); + de->smoothing_shift = debugfs_create_u32("smoothing_shift", + S_IRUSR | S_IWUSR, de->dir, + &pinfo->smoothing_shift); + de->sharpen_factor = debugfs_create_u32("sharpen_factor", + S_IRUSR | S_IWUSR, de->dir, + &pinfo->sharpen_factor); + de->sharpen_duration = debugfs_create_u32("sharpen_duration", + S_IRUSR | S_IWUSR, de->dir, + &pinfo->sharpen_duration); + de->norm_offset = debugfs_create_u32("norm_offset", + S_IRUSR | S_IWUSR, de->dir, + &pinfo->norm_offset); + de->fast_start = debugfs_create_bool("fast_start", + S_IRUSR | S_IWUSR, de->dir, + &pinfo->fast_start); +#endif + return pinfo; } static void rate_control_pid_free(void *priv) { struct rc_pid_info *pinfo = priv; +#ifdef CONFIG_MAC80211_DEBUGFS + struct rc_pid_debugfs_entries *de = &pinfo->dentries; + + debugfs_remove(de->fast_start); + debugfs_remove(de->norm_offset); + debugfs_remove(de->sharpen_duration); + debugfs_remove(de->sharpen_factor); + debugfs_remove(de->smoothing_shift); + debugfs_remove(de->coeff_d); + debugfs_remove(de->coeff_i); + debugfs_remove(de->coeff_p); + debugfs_remove(de->sampling_period); + debugfs_remove(de->target); + debugfs_remove(de->dir); +#endif + kfree(pinfo->rinfo); kfree(pinfo); } |
