From patchwork Thu Oct 7 16:15:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 12542219 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A25AC433EF for ; Thu, 7 Oct 2021 16:16:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D47761130 for ; Thu, 7 Oct 2021 16:16:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242583AbhJGQSh (ORCPT ); Thu, 7 Oct 2021 12:18:37 -0400 Received: from smtp-relay-canonical-1.canonical.com ([185.125.188.121]:53954 "EHLO smtp-relay-canonical-1.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242220AbhJGQSg (ORCPT ); Thu, 7 Oct 2021 12:18:36 -0400 Received: from localhost.localdomain (unknown [10.101.196.174]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-1.canonical.com (Postfix) with ESMTPSA id 552F33FFDC; Thu, 7 Oct 2021 16:16:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1633623401; bh=0KLgW6RNFHGRR3uPAzV96CLFDLpsWVBFEtnvoPaS81A=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=lWhgTiy2lGSZx3R7dSParXUd5ML4pjvSOvIfTGs4l56VPnK90GoA/ShoBCP9H3sJ4 19g9xh8NVOrQPyLue6ebnBk52KHhegOsc2nKS/rKAkzclXlYn+197QZsPrI41VTUOu RyqKNDgtgvP94luSf/Ucv8Bh08Q33u9KuQBfwLIhqXE0DWQlLyh139n/VRHgps0KRW gBugO2ba7rVSzk97wdUYvEiilsYLPp+c6QtKLpFSxZgFb5CBa8OLKg/n6gwSKeWCri vGQwbopZeRtC2yQiR5rSdcdK6Dl67RvmIDzjcwiXWOAc1hEkOl4uR2HtI6tKy36Iog iVeGbkACgbkPw== From: Kai-Heng Feng To: hkallweit1@gmail.com, nic_swsd@realtek.com, bhelgaas@google.com Cc: davem@davemloft.net, kuba@kernel.org, anthony.wong@canonical.com, netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Kai-Heng Feng Subject: [RFC] [PATCH net-next v6 0/3] r8169: Implement dynamic ASPM mechanism for recent 1.0/2.5Gbps Realtek NICs Date: Fri, 8 Oct 2021 00:15:49 +0800 Message-Id: <20211007161552.272771-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The purpose of the series is to get comments and reviews so we can merge and test the series in downstream kernel. The latest Realtek vendor driver and its Windows driver implements a feature called "dynamic ASPM" which can improve performance on it's ethernet NICs. Heiner Kallweit pointed out the potential root cause can be that the buffer is to small for its ASPM exit latency. So bring the dynamic ASPM to r8169 so we can have both nice performance and powersaving at the same time. For the slow/fast alternating traffic pattern, we'll need some real world test to know if we need to lower the dynamic ASPM interval. v5: https://lore.kernel.org/netdev/20210916154417.664323-1-kai.heng.feng@canonical.com/ v4: https://lore.kernel.org/netdev/20210827171452.217123-1-kai.heng.feng@canonical.com/ v3: https://lore.kernel.org/netdev/20210819054542.608745-1-kai.heng.feng@canonical.com/ v2: https://lore.kernel.org/netdev/20210812155341.817031-1-kai.heng.feng@canonical.com/ v1: https://lore.kernel.org/netdev/20210803152823.515849-1-kai.heng.feng@canonical.com/ Kai-Heng Feng (3): PCI/ASPM: Introduce a new helper to report ASPM capability r8169: Enable chip-specific ASPM regardless of PCIe ASPM status r8169: Implement dynamic ASPM mechanism drivers/net/ethernet/realtek/r8169_main.c | 69 ++++++++++++++++++++--- drivers/pci/pcie/aspm.c | 11 ++++ include/linux/pci.h | 2 + 3 files changed, 73 insertions(+), 9 deletions(-)