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=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 97F53C004D3 for ; Wed, 24 Oct 2018 14:26:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3C7EE207DD for ; Wed, 24 Oct 2018 14:26:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="OeewyqC9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C7EE207DD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-wireless-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726587AbeJXWzR (ORCPT ); Wed, 24 Oct 2018 18:55:17 -0400 Received: from mail-oi1-f179.google.com ([209.85.167.179]:36405 "EHLO mail-oi1-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726426AbeJXWzR (ORCPT ); Wed, 24 Oct 2018 18:55:17 -0400 Received: by mail-oi1-f179.google.com with SMTP id p125-v6so4235400oic.3 for ; Wed, 24 Oct 2018 07:26:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=rHJ9uZ6xGCIBdHBqQBNlInGkVxMfyT7ldkuhA3m5Dh8=; b=OeewyqC9ud5l4TJRqAhGV1Ar3RYvLlVFDnkAUDIbqFRnV/xwUxszng/g+mE/9+6mKU YLJT1gHr8NxMKHoiKoB5BF8j+XfL1eZwXTD7ohTATBYB4hg0m2xg90+lC7C7XWkxE1Is F2Fvi5lYGXPYElt1TXOMrEplgP7NIePTJNbredET3qIYuh1dVuBBD15xvsXdynfVCyX1 eb3L2tpWIgUbmdIfII2zCPbPKl+zB7fs5Z77Z2GyuFi/jWzj7OJG03ekhbjvH8zWgyWs cZbjtP3J6txuA21hwRq7fLNd57hC2SVks6gRpiN8CZGBLp7/iEflm91x1o24kdkmDS82 7hQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=rHJ9uZ6xGCIBdHBqQBNlInGkVxMfyT7ldkuhA3m5Dh8=; b=rqdWV0Ln0+y41TQRgLPgaEoKuY0c9dljGcmdyG5ajBJXZJYfWB1xPpvGFG8Dtsm2f7 y6QnPVTQSrmL7UHWGy+DhcUCJI7omfa6NidjqqnOj1V4CAy9uOLks9Lf9pcgZFk8u8rZ CnxTWbUSuCn8LxVBifeAaGhEktTsjl8iaZtxgVpHD1Saz8itgADHnQIfYrYt0nAodyCV 3xIURdA7/+KUyMOO5cCXLggQhKS6bmF/69RgVylLqLOsWsm+QsO1Hk+FgPXaR5IzsD2K hWgZaQKkOgC4QxrwVkgXQkBTMbr5I5qC3VEw1kpg5Fc2m1ogKKGKPeY3KiweLgfrpseX kLmw== X-Gm-Message-State: AGRZ1gJGzD5vMaGjnZZMdKMEYVN3piPjTJFyN6xMexlC4qIiGUCwk2MM OUBlnN+/iLKr2CcceOzJC7e0B6qcnV9htSOxVx43rg== X-Google-Smtp-Source: AJdET5fshsPaBqd9nyl79LbY80CfP/ZVnt3d9Ll8h2t9yh1a2pNhJBGoESe+5J0hPai1vztnpgR6lwZJNe/1aD58EKI= X-Received: by 2002:aca:4806:: with SMTP id v6-v6mr1556914oia.163.1540391217156; Wed, 24 Oct 2018 07:26:57 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a9d:2eab:0:0:0:0:0 with HTTP; Wed, 24 Oct 2018 07:26:56 -0700 (PDT) From: Tom Psyborg Date: Wed, 24 Oct 2018 16:26:56 +0200 Message-ID: Subject: dynack slows down network when enabled on AR9462 card To: linux-wireless Content-Type: text/plain; charset="UTF-8" Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Hi Running several tests with dynack enabled on AR9462 card I can see throughput drop in 10-30Mbps range. The card is running on 4.9.135 kernel (same issue was present on 3.2.11 with backports4.4.2) while QCA9531 router is running 4.9.111. Distance between the two is less than 1m. Results: QCA9531 auto distance + AR9462 default -> 10Mbps higher RX bandwidth on client (AR9462), RX bandwidth remain unchanged QCA9531 default + AR9462 auto distance -> at least 10Mbps lower RX bandwidth and up to 30Mbps (depending on window size) lower TX bandwidth on client QCA9531 auto distance + AR9462 auto distance -> at least 10Mbps lower RX bandwidth and up to 30Mbps (depending on window size) lower TX bandwidth on client Given that the bandwidth improves when executed iw phy0 set distance auto on router and degrades in any case same command is executed on client PC running AR9462 seems like there are some timers misconfiguration in ath9k regarding this card. Any thoughts on this? Regards, Tom