From patchwork Sat Oct 14 09:29:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 735039 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C254CDB465 for ; Sat, 14 Oct 2023 09:30:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233014AbjJNJab (ORCPT ); Sat, 14 Oct 2023 05:30:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232937AbjJNJab (ORCPT ); Sat, 14 Oct 2023 05:30:31 -0400 Received: from mail-lj1-x22b.google.com (mail-lj1-x22b.google.com [IPv6:2a00:1450:4864:20::22b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 24B6BBF; Sat, 14 Oct 2023 02:30:29 -0700 (PDT) Received: by mail-lj1-x22b.google.com with SMTP id 38308e7fff4ca-2c514cbbe7eso3039731fa.1; Sat, 14 Oct 2023 02:30:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697275827; x=1697880627; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=vVgxHCn/B7V074W174vEDwqS68k37Kzh+EyWr5cIE3M=; b=a5n1L684NdmB7DzIzSgpOgLXdlAIAD+DND0RpDFATQCCm0pZlu4l+w/fkh9PwmLhQE 7sDo0N02AbHWB3N9QxSIVfmspXdSgE6G/8b9F8iLsLJ3UFIWp1QLUv02Jcst+OpMSAG4 aMxxk8ELPKHK/+aJ6qu3TjeyOofVkY6KnHboYNHqjE0CFuBmOyQriR+V91l8NX3SXUGz 0Pkh8GrLdV7ErFw2uDlA137i7EF4gy2zJDUjJW1hN7QNm8hhDn9iGfS6Avthw3QAp/aq 4sbw2COLWxaKnQDAikXwS6YoCBipqY0bys2rRALtmuGCB36KI3wdWVfRSg7gQaBYIqwu +uQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697275827; x=1697880627; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=vVgxHCn/B7V074W174vEDwqS68k37Kzh+EyWr5cIE3M=; b=jWHXB2moOXs647FzREq6X+Q22ajIoHfQ+ebmWTFvLTY3T9A4OwcAK0xVP3Em21DbAx uKgqAqzkEYmX3JGwZ0kztvVhbUvMf771PYSw3S/dV0OgRjwIMkLEAzCcyR5v4ooWbu0H 2ykRZOGJCjufwju2px+TXLv92FHARrDN3LJLNrivMncWIZy+z2mGJCM9Y1F5BRXi8zxp c6ZiE63TOj7ZCd1tbtmI52LoeidLUKHQi0ONcHIvkD8WfDtx+Jdi9SG7a45CsZkhGT+3 ZDyUnZSAbyD18J731WFCrqBDzw27sNVe970ZuVi6E5h0NUMJ4naagjjMXwb6DhlmGpN9 /ECQ== X-Gm-Message-State: AOJu0YxBaWs18i+rVY+E7HS5dpMk8vZs3UylVKw6Z5DanPamskOQF+O+ eBW3tTi0vDrjYJvKvOiZpQg= X-Google-Smtp-Source: AGHT+IGJJJQm7yfJhqss5S4XY8Bm6bfFs0fCEocRUTeiHfSNoKjAzN8d4DstSYgAxtzxjhfGDA7Lxg== X-Received: by 2002:a05:6512:695:b0:503:28cb:c087 with SMTP id t21-20020a056512069500b0050328cbc087mr37064060lfe.29.1697275826447; Sat, 14 Oct 2023 02:30:26 -0700 (PDT) Received: from localhost.localdomain (93-34-89-13.ip49.fastwebnet.it. [93.34.89.13]) by smtp.googlemail.com with ESMTPSA id u12-20020adff88c000000b0032d9a1f2ec3sm3691564wrp.27.2023.10.14.02.30.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Oct 2023 02:30:26 -0700 (PDT) From: Christian Marangi To: Raju Rangoju , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexandre Torgue , Jose Abreu , Maxime Coquelin , Ping-Ke Shih , Kalle Valo , Simon Horman , Daniel Borkmann , Jiri Pirko , Hangbin Liu , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-wireless@vger.kernel.org Cc: Christian Marangi Subject: [net-next PATCH v3 0/4] net: stmmac: improve tx timer logic Date: Sat, 14 Oct 2023 11:29:50 +0200 Message-Id: <20231014092954.1850-1-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org This series comes with the intention of restoring original performance of stmmac on some router/device that used the stmmac driver to handle gigabit traffic. More info are present in patch 3. This cover letter is to show results and improvements of the following change. The move to hr_timer for tx timer and commit 8fce33317023 ("net: stmmac: Rework coalesce timer and fix multi-queue races") caused big performance regression on these kind of device. This was observed on ipq806x that after kernel 4.19 couldn't handle gigabit speed anymore. The following series is currently applied and tested in OpenWrt SNAPSHOT and have great performance increase. (the scenario is qca8k switch + stmmac dwmac1000) Some good comparison can be found here [1]. The difference is from a swconfig scenario (where dsa tagging is not used so very low CPU impact in handling traffic) and DSA scenario where tagging is used and there is a minimal impact in the CPU. As can be notice even with DSA in place we have better perf. It was observed by other user that also SQM scenario with cake scheduler were improved in the order of 100mbps (this scenario is CPU limited and any increase of perf is caused by removing load on the CPU) Been at least 15 days that this is in use without any complain or bug reported about queue timeout. (was the case with v1 before the additional patch was added, only appear on real world tests and not on iperf tests) [1] https://forum.openwrt.org/t/netgear-r7800-exploration-ipq8065-qca9984/285/3427?u=ansuel Changes v3: - Fix compilation error for missing comma Changes v2: - Add patch to move tx timer arm outside tx clean. Christian Marangi (4): net: introduce napi_is_scheduled helper net: stmmac: improve TX timer arm logic net: stmmac: move TX timer arm after DMA enable net: stmmac: increase TX coalesce timer to 5ms drivers/net/ethernet/chelsio/cxgb3/sge.c | 8 ---- drivers/net/ethernet/stmicro/stmmac/common.h | 2 +- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 37 +++++++++++++++---- drivers/net/wireless/realtek/rtw89/core.c | 2 +- include/linux/netdevice.h | 23 ++++++++++++ net/core/dev.c | 2 +- 6 files changed, 56 insertions(+), 18 deletions(-)