mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Thomas Huehn](/assets/img/avatar_default.png)
This patch restructures the rc_stats debugfs table of Minstrel-HT in order to achieve better human readability. A new layout of the statistics and a new header is added. In addition to the old layout there are two new columns of information added: idx - representing the rate index of each rate in mac80211 which can be used to set specific rates as fixed rate via debugfs airtime - the tx-time in micro seconds that a 1200 Byte packet takes to be transmitted over the air at the given rate The old layout of rc_stats: type rate tpt eprob *prob ret *ok(*cum) ok( cum) HT20/LGI MCS0 5.6 100.0 100.0 1 0( 0) 1( 1) HT20/LGI B MCS1 10.5 100.0 100.0 0 0( 0) 1( 1) HT20/LGI A MCS2 14.8 100.0 100.0 0 0( 0) 1( 1) ... is changed into this new layout: best ________rate______ __statistics__ ________last_______ ______sum-of________ mode guard # rate [name idx airtime] [ ø(tp) ø(prob)] [prob.|retry|suc|att] [#success | #attempts] HT20 LGI 1 MCS0 0 1480 0.0 0.0 0.0 1 0 0 0 0 HT20 LGI 1 B MCS1 1 740 10.5 100.0 100.0 0 0 0 1 1 HT20 LGI 1 A MCS2 2 496 14.8 100.0 100.0 0 0 0 1 1 ... 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> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
178 lines
4.8 KiB
C
178 lines
4.8 KiB
C
/*
|
|
* Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
|
|
*
|
|
* 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
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/netdevice.h>
|
|
#include <linux/types.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/ieee80211.h>
|
|
#include <linux/export.h>
|
|
#include <net/mac80211.h>
|
|
#include "rc80211_minstrel.h"
|
|
#include "rc80211_minstrel_ht.h"
|
|
|
|
static char *
|
|
minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
|
|
{
|
|
const struct mcs_group *mg;
|
|
unsigned int j, tp, prob, eprob, tx_time;
|
|
char htmode = '2';
|
|
char gimode = 'L';
|
|
u32 gflags;
|
|
|
|
if (!mi->groups[i].supported)
|
|
return p;
|
|
|
|
mg = &minstrel_mcs_groups[i];
|
|
gflags = mg->flags;
|
|
|
|
if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
|
|
htmode = '4';
|
|
else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
|
|
htmode = '8';
|
|
if (gflags & IEEE80211_TX_RC_SHORT_GI)
|
|
gimode = 'S';
|
|
|
|
for (j = 0; j < MCS_GROUP_RATES; j++) {
|
|
struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
|
|
static const int bitrates[4] = { 10, 20, 55, 110 };
|
|
int idx = i * MCS_GROUP_RATES + j;
|
|
|
|
if (!(mi->groups[i].supported & BIT(j)))
|
|
continue;
|
|
|
|
if (gflags & IEEE80211_TX_RC_MCS) {
|
|
p += sprintf(p, "HT%c0 ", htmode);
|
|
p += sprintf(p, "%cGI ", gimode);
|
|
p += sprintf(p, "%d ", mg->streams);
|
|
} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
|
|
p += sprintf(p, "VHT%c0 ", htmode);
|
|
p += sprintf(p, "%cGI ", gimode);
|
|
p += sprintf(p, "%d ", mg->streams);
|
|
} else {
|
|
p += sprintf(p, "CCK ");
|
|
p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S');
|
|
p += sprintf(p, "1 ");
|
|
}
|
|
|
|
*(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
|
|
*(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
|
|
*(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
|
|
*(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
|
|
*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
|
|
|
|
if (gflags & IEEE80211_TX_RC_MCS) {
|
|
p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
|
|
} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
|
|
p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
|
|
} else {
|
|
int r = bitrates[j % 4];
|
|
|
|
p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
|
|
}
|
|
|
|
p += sprintf(p, " %3u ", idx);
|
|
|
|
/* tx_time[rate(i)] in usec */
|
|
tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
|
|
p += sprintf(p, "%6u ", tx_time);
|
|
|
|
tp = mr->cur_tp / 10;
|
|
prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
|
|
eprob = MINSTREL_TRUNC(mr->probability * 1000);
|
|
|
|
p += sprintf(p, "%4u.%1u %3u.%1u %3u.%1u "
|
|
"%3u %3u %-3u %9llu %-9llu\n",
|
|
tp / 10, tp % 10,
|
|
eprob / 10, eprob % 10,
|
|
prob / 10, prob % 10,
|
|
mr->retry_count,
|
|
mr->last_success,
|
|
mr->last_attempts,
|
|
(unsigned long long)mr->succ_hist,
|
|
(unsigned long long)mr->att_hist);
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
static int
|
|
minstrel_ht_stats_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct minstrel_ht_sta_priv *msp = inode->i_private;
|
|
struct minstrel_ht_sta *mi = &msp->ht;
|
|
struct minstrel_debugfs_info *ms;
|
|
unsigned int i;
|
|
char *p;
|
|
int ret;
|
|
|
|
if (!msp->is_ht) {
|
|
inode->i_private = &msp->legacy;
|
|
ret = minstrel_stats_open(inode, file);
|
|
inode->i_private = msp;
|
|
return ret;
|
|
}
|
|
|
|
ms = kmalloc(32768, GFP_KERNEL);
|
|
if (!ms)
|
|
return -ENOMEM;
|
|
|
|
file->private_data = ms;
|
|
p = ms->buf;
|
|
|
|
p += sprintf(p, "\n");
|
|
p += sprintf(p, " best ________rate______ "
|
|
"__statistics__ ________last_______ "
|
|
"______sum-of________\n");
|
|
p += sprintf(p, "mode guard # rate [name idx airtime] [ ø(tp) "
|
|
"ø(prob)] [prob.|retry|suc|att] [#success | "
|
|
"#attempts]\n");
|
|
|
|
p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
|
|
for (i = 0; i < MINSTREL_CCK_GROUP; i++)
|
|
p = minstrel_ht_stats_dump(mi, i, p);
|
|
for (i++; i < ARRAY_SIZE(mi->groups); i++)
|
|
p = minstrel_ht_stats_dump(mi, i, p);
|
|
|
|
p += sprintf(p, "\nTotal packet count:: ideal %d "
|
|
"lookaround %d\n",
|
|
max(0, (int) mi->total_packets - (int) mi->sample_packets),
|
|
mi->sample_packets);
|
|
p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
|
|
MINSTREL_TRUNC(mi->avg_ampdu_len),
|
|
MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
|
|
ms->len = p - ms->buf;
|
|
|
|
WARN_ON(ms->len + sizeof(*ms) > 32768);
|
|
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static const struct file_operations minstrel_ht_stat_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = minstrel_ht_stats_open,
|
|
.read = minstrel_stats_read,
|
|
.release = minstrel_stats_release,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
void
|
|
minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
|
|
{
|
|
struct minstrel_ht_sta_priv *msp = priv_sta;
|
|
|
|
msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
|
|
&minstrel_ht_stat_fops);
|
|
}
|
|
|
|
void
|
|
minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
|
|
{
|
|
struct minstrel_ht_sta_priv *msp = priv_sta;
|
|
|
|
debugfs_remove(msp->dbg_stats);
|
|
}
|