From patchwork Tue Mar 17 17:29:13 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Huehn X-Patchwork-Id: 6033361 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: X-Original-To: patchwork-linux-wireless@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 7196EBF90F for ; Tue, 17 Mar 2015 17:28:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5FA0A204D1 for ; Tue, 17 Mar 2015 17:28:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2228E204C9 for ; Tue, 17 Mar 2015 17:28:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932962AbbCQR2Y (ORCPT ); Tue, 17 Mar 2015 13:28:24 -0400 Received: from mail.net.t-labs.tu-berlin.de ([130.149.220.252]:45817 "EHLO mail.net.t-labs.tu-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932669AbbCQR2Q (ORCPT ); Tue, 17 Mar 2015 13:28:16 -0400 Received: from bob.bowl.t-labs.tu-berlin.de (unknown [130.149.221.98]) by mail.net.t-labs.tu-berlin.de (Postfix) with ESMTPSA id 539C785D77; Tue, 17 Mar 2015 18:28:14 +0100 (CET) From: Thomas Huehn To: linux-wireless@vger.kernel.org Cc: johannes@sipsolutions.net, nbd@nbd.name, thomas@net.t-labs.tu-berlin.de Subject: [PATCH v3 04/10] mac80211: add new Minstrel-HT statistic output via csv Date: Tue, 17 Mar 2015 18:29:13 +0100 Message-Id: <1426613359-31306-4-git-send-email-thomas@net.t-labs.tu-berlin.de> X-Mailer: git-send-email 2.3.0 In-Reply-To: <1426613359-31306-1-git-send-email-thomas@net.t-labs.tu-berlin.de> References: <1426613359-31306-1-git-send-email-thomas@net.t-labs.tu-berlin.de> Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds a new debugfs file "rc_stats_csv" to output Minstrel-HTs statistics in a common csv format that is easy to parse. Signed-off-by: Thomas Huehn Signed-off-by: Stefan Venz --- net/mac80211/rc80211_minstrel_ht.h | 1 + net/mac80211/rc80211_minstrel_ht_debugfs.c | 145 ++++++++++++++++++++++++++++- 2 files changed, 144 insertions(+), 2 deletions(-) diff --git a/net/mac80211/rc80211_minstrel_ht.h b/net/mac80211/rc80211_minstrel_ht.h index f2217d6..3cc30e8 100644 --- a/net/mac80211/rc80211_minstrel_ht.h +++ b/net/mac80211/rc80211_minstrel_ht.h @@ -112,6 +112,7 @@ struct minstrel_ht_sta_priv { }; #ifdef CONFIG_MAC80211_DEBUGFS struct dentry *dbg_stats; + struct dentry *dbg_stats_csv; #endif void *ratelist; void *sample_table; diff --git a/net/mac80211/rc80211_minstrel_ht_debugfs.c b/net/mac80211/rc80211_minstrel_ht_debugfs.c index 7fc690f..133d7b6 100644 --- a/net/mac80211/rc80211_minstrel_ht_debugfs.c +++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c @@ -107,8 +107,8 @@ minstrel_ht_stats_open(struct inode *inode, struct file *file) struct minstrel_ht_sta *mi = &msp->ht; struct minstrel_debugfs_info *ms; unsigned int i; - char *p; int ret; + char *p; if (!msp->is_ht) { inode->i_private = &msp->legacy; @@ -146,7 +146,6 @@ minstrel_ht_stats_open(struct inode *inode, struct file *file) 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); @@ -160,6 +159,145 @@ static const struct file_operations minstrel_ht_stat_fops = { .llseek = no_llseek, }; +static char * +minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p, + struct timeval tv) +{ + 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; + + p += sprintf(p, "%ld.%.6ld,", tv.tv_sec, tv.tv_usec); + + 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 += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : "")); + p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : "")); + p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : "")); + p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : "")); + p += sprintf(p, "%s" ,((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, "%u,", idx); + tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000); + p += sprintf(p, "%u,", tx_time); + + tp = mr->cur_tp / 10; + prob = MINSTREL_TRUNC(mr->cur_prob * 1000); + eprob = MINSTREL_TRUNC(mr->probability * 1000); + + p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,%u,%llu,%llu,", + 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); + p += sprintf(p, "%d,%d,%d.%d\n", + max(0, (int) mi->total_packets - + (int) mi->sample_packets), + mi->sample_packets, + MINSTREL_TRUNC(mi->avg_ampdu_len), + MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); + } + + return p; +} + +static int +minstrel_ht_stats_csv_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; + struct timeval tv; + unsigned int i; + int ret; + char *p; + + do_gettimeofday(&tv); + + if (!msp->is_ht) { + inode->i_private = &msp->legacy; + ret = minstrel_stats_csv_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 = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p, tv); + for (i = 0; i < MINSTREL_CCK_GROUP; i++) + p = minstrel_ht_stats_csv_dump(mi, i, p, tv); + for (i++; i < ARRAY_SIZE(mi->groups); i++) + p = minstrel_ht_stats_csv_dump(mi, i, p, tv); + + 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_csv_fops = { + .owner = THIS_MODULE, + .open = minstrel_ht_stats_csv_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) { @@ -167,6 +305,8 @@ minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp, &minstrel_ht_stat_fops); + msp->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO, + dir, msp, &minstrel_ht_stat_csv_fops); } void @@ -175,4 +315,5 @@ minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta) struct minstrel_ht_sta_priv *msp = priv_sta; debugfs_remove(msp->dbg_stats); + debugfs_remove(msp->dbg_stats_csv); }