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mac80211: add new Minstrel statistic output via csv 

This patch adds a new debugfs file "rc_stats_csv" to output Minstrels
statistics in a common csv format that is easy to parse.

Signed-off-by: Thomas Huehn <thomas@net.t-labs.tu-berlin.de>
Signed-off-by: Stefan Venz <ikstream86@gmail.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
[remove printing current time of day]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Thomas Huehn 2015-03-24 21:09:36 +01:00 committed by Johannes Berg
parent 9c00bb7210
commit 6d48851779
2 changed files with 87 additions and 19 deletions
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6
net/mac80211/rc80211_minstrel.h
View File

@ -13,7 +13,6 @@
#define EWMA_DIV 128
#define SAMPLE_COLUMNS 10 /* number of columns in sample table */
/* scaled fraction values */
#define MINSTREL_SCALE 16
#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div)
@ -24,7 +23,7 @@
/*
* Perform EWMA (Exponentially Weighted Moving Average) calculation
*/
*/
static inline int
minstrel_ewma(int old, int new, int weight)
{
@ -95,6 +94,7 @@ struct minstrel_sta_info {
#ifdef CONFIG_MAC80211_DEBUGFS
struct dentry *dbg_stats;
struct dentry *dbg_stats_csv;
#endif
};
@ -121,7 +121,6 @@ struct minstrel_priv {
u32 fixed_rate_idx;
struct dentry *dbg_fixed_rate;
#endif
};
struct minstrel_debugfs_info {
@ -135,6 +134,7 @@ void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
/* debugfs */
int minstrel_stats_open(struct inode *inode, struct file *file);
int minstrel_stats_csv_open(struct inode *inode, struct file *file);
ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos);
int minstrel_stats_release(struct inode *inode, struct file *file);

100
net/mac80211/rc80211_minstrel_debugfs.c
View File

@ -54,6 +54,22 @@
#include <net/mac80211.h>
#include "rc80211_minstrel.h"
ssize_t
minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
{
struct minstrel_debugfs_info *ms;
ms = file->private_data;
return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
}
int
minstrel_stats_release(struct inode *inode, struct file *file)
{
kfree(file->private_data);
return 0;
}
int
minstrel_stats_open(struct inode *inode, struct file *file)
{
@ -115,22 +131,6 @@ minstrel_stats_open(struct inode *inode, struct file *file)
return 0;
}
ssize_t
minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
{
struct minstrel_debugfs_info *ms;
ms = file->private_data;
return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
}
int
minstrel_stats_release(struct inode *inode, struct file *file)
{
kfree(file->private_data);
return 0;
}
static const struct file_operations minstrel_stat_fops = {
.owner = THIS_MODULE,
.open = minstrel_stats_open,
@ -139,6 +139,69 @@ static const struct file_operations minstrel_stat_fops = {
.llseek = default_llseek,
};
int
minstrel_stats_csv_open(struct inode *inode, struct file *file)
{
struct minstrel_sta_info *mi = inode->i_private;
struct minstrel_debugfs_info *ms;
unsigned int i, tp, prob, eprob;
char *p;
ms = kmalloc(2048, GFP_KERNEL);
if (!ms)
return -ENOMEM;
file->private_data = ms;
p = ms->buf;
for (i = 0; i < mi->n_rates; i++) {
struct minstrel_rate *mr = &mi->r[i];
struct minstrel_rate_stats *mrs = &mi->r[i].stats;
p += sprintf(p, "%s" ,((i == mi->max_tp_rate[0]) ? "A" : ""));
p += sprintf(p, "%s" ,((i == mi->max_tp_rate[1]) ? "B" : ""));
p += sprintf(p, "%s" ,((i == mi->max_tp_rate[2]) ? "C" : ""));
p += sprintf(p, "%s" ,((i == mi->max_tp_rate[3]) ? "D" : ""));
p += sprintf(p, "%s" ,((i == mi->max_prob_rate) ? "P" : ""));
p += sprintf(p, ",%u%s", mr->bitrate / 2,
(mr->bitrate & 1 ? ".5," : ","));
p += sprintf(p, "%u,", i);
p += sprintf(p, "%u,",mr->perfect_tx_time);
tp = MINSTREL_TRUNC(mrs->cur_tp / 10);
prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
eprob = MINSTREL_TRUNC(mrs->probability * 1000);
p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,%u,"
"%llu,%llu,%d,%d\n",
tp / 10, tp % 10,
eprob / 10, eprob % 10,
prob / 10, prob % 10,
mrs->retry_count,
mrs->last_success,
mrs->last_attempts,
(unsigned long long)mrs->succ_hist,
(unsigned long long)mrs->att_hist,
mi->total_packets - mi->sample_packets,
mi->sample_packets);
}
ms->len = p - ms->buf;
WARN_ON(ms->len + sizeof(*ms) > 2048);
return 0;
}
static const struct file_operations minstrel_stat_csv_fops = {
.owner = THIS_MODULE,
.open = minstrel_stats_csv_open,
.read = minstrel_stats_read,
.release = minstrel_stats_release,
.llseek = default_llseek,
};
void
minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
{
@ -146,6 +209,9 @@ minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
&minstrel_stat_fops);
mi->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO, dir,
mi, &minstrel_stat_csv_fops);
}
void
@ -154,4 +220,6 @@ minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
struct minstrel_sta_info *mi = priv_sta;
debugfs_remove(mi->dbg_stats);
debugfs_remove(mi->dbg_stats_csv);
}