Return-path: Received: from mail.net.t-labs.tu-berlin.de ([130.149.220.252]:40854 "EHLO mail.net.t-labs.tu-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932818Ab3CDWaN (ORCPT ); Mon, 4 Mar 2013 17:30:13 -0500 From: Thomas Huehn To: linville@tuxdriver.com Cc: linux-wireless@vger.kernel.org, johannes@sipsolutions.net, nbd@openwrt.org, thomas@net.t-labs.tu-berlin.de Subject: [PATCH v4 6/7] mac80211: treat minstrel success probabilities below 10% as implausible Date: Mon, 4 Mar 2013 23:30:06 +0100 Message-Id: <1362436208-75786-7-git-send-email-thomas@net.t-labs.tu-berlin.de> (sfid-20130304_233025_093884_D48DFEAF) In-Reply-To: <1362436208-75786-1-git-send-email-thomas@net.t-labs.tu-berlin.de> References: <1362436208-75786-1-git-send-email-thomas@net.t-labs.tu-berlin.de> Sender: linux-wireless-owner@vger.kernel.org List-ID: Based on minstrel_ht this patch treats success probabilities below 10% as implausible values for throughput calculation in minstrel's statistics. Current throughput per rate with such a low success probability is reset to 0 MBit/s. Signed-off-by: Thomas Huehn --- net/mac80211/rc80211_minstrel.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c index 5c0f532..f8d99a5 100644 --- a/net/mac80211/rc80211_minstrel.c +++ b/net/mac80211/rc80211_minstrel.c @@ -92,7 +92,6 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi) mr->probability = minstrel_ewma(mr->probability, mr->cur_prob, EWMA_LEVEL); - mr->cur_tp = mr->probability * (1000000 / usecs); } else mr->sample_skipped++; @@ -101,6 +100,12 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi) mr->success = 0; mr->attempts = 0; + /* Update throughput per rate, reset thr. below 10% success */ + if (mr->probability < MINSTREL_FRAC(10, 100)) + mr->cur_tp = 0; + else + mr->cur_tp = mr->probability * (1000000 / usecs); + /* Sample less often below the 10% chance of success. * Sample less often above the 95% chance of success. */ if (mr->probability > MINSTREL_FRAC(95, 100) || -- 1.8.1.1