From patchwork Tue Dec 29 16:01:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felix Fietkau X-Patchwork-Id: 354161 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AA11C433E6 for ; Tue, 29 Dec 2020 16:02:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C1E521D94 for ; Tue, 29 Dec 2020 16:02:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726659AbgL2QC1 (ORCPT ); Tue, 29 Dec 2020 11:02:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726586AbgL2QC0 (ORCPT ); Tue, 29 Dec 2020 11:02:26 -0500 Received: from nbd.name (nbd.name [IPv6:2a01:4f8:221:3d45::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 59F41C06179A for ; Tue, 29 Dec 2020 08:01:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nbd.name; s=20160729; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=4Cc2WIYX0G5jqvwSfwbMlmVwB7JJTTi0EjZpMo3oQNI=; b=Thfv4HDgiDx8fATXrmvBzEegrs bI9mFlrhpIaNAJggKI1oczkV4QnV1xO2KhSv3cUzLzUNdIALltaJnVbtWmG/stZysKEeNaAnZdlIo qsIzYJSu5JKWBHLoRiA0Tr0qH1JhR9l4+OXNvzm2abYz+Ky4Ijc8DGWE+UupmBF4hCu8=; Received: from p54ae91f2.dip0.t-ipconnect.de ([84.174.145.242] helo=localhost.localdomain) by ds12 with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.89) (envelope-from ) id 1kuHRA-0005ka-IN; Tue, 29 Dec 2020 17:01:28 +0100 From: Felix Fietkau To: linux-wireless@vger.kernel.org Cc: johannes@sipsolutions.net Subject: [PATCH 6/8] mac80211: minstrel_ht: improve sample rate selection Date: Tue, 29 Dec 2020 17:01:23 +0100 Message-Id: <20201229160125.92794-6-nbd@nbd.name> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201229160125.92794-1-nbd@nbd.name> References: <20201229160125.92794-1-nbd@nbd.name> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Always allow sampling of rates faster than the primary max throughput rate. When the second max_tp_rate is higher than the first one, sample attempts were previously skipped, potentially causing rate control to get stuck at a slightly lower rate Signed-off-by: Felix Fietkau --- net/mac80211/rc80211_minstrel_ht.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index 950e6d2b4525..dcc4394a872a 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -1379,13 +1379,13 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) mrs = &mg->rates[sample_idx]; sample_idx += sample_group * MCS_GROUP_RATES; - /* Set tp_rate1, tp_rate2 to the highest / second highest max_tp_rate */ + tp_rate1 = mi->max_tp_rate[0]; + + /* Set tp_rate2 to the second highest max_tp_rate */ if (minstrel_get_duration(mi->max_tp_rate[0]) > minstrel_get_duration(mi->max_tp_rate[1])) { - tp_rate1 = mi->max_tp_rate[1]; tp_rate2 = mi->max_tp_rate[0]; } else { - tp_rate1 = mi->max_tp_rate[0]; tp_rate2 = mi->max_tp_rate[1]; }