From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 22C0FECAAD5 for ; Mon, 5 Sep 2022 05:13:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:CC:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kro5UhmPW4ThvTA9Xy6/kjnguAXFfgzyJWoyPA6sWwU=; b=JFtYkQGi+O/gyK ZsDYuVTP5t8BfG3B/o4YrhZEWgG2AFvCTM8vSeIQvZMrdPXReGwca88k0Xc5OT8IgTH/Z9A6DUvoK 85hYoHkJuAv36La1XeaJ59ZSadoqLL2JhGHe8faiuUW4VTIrEnYhqplkSVr4WsfxS9098dVOpKW5D 6rWI5d/a5soS8nqDBoKCs5jpiWiyFUTYUVI6Q/4Q2DmoJwIfryNiwSIEKQi8Q9Y8HkMKIrfDF4gv/ NLwM8/H+PO2zR1cxhsfyG+A64Vw0DQL1dYJTtUy55++EPbfivFzo+v4tvKrDaPlKT6931j/eJNFrO O0fPVPAHpDLxKRZGOBZQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oV4Pk-00AXiA-7D; Mon, 05 Sep 2022 05:12:52 +0000 Received: from mail-sz.amlogic.com ([211.162.65.117]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oV3gJ-008fUG-Nf; Mon, 05 Sep 2022 04:25:59 +0000 Received: from [10.88.37.128] (10.88.37.128) by mail-sz.amlogic.com (10.28.11.5) with Microsoft SMTP Server id 15.1.2507.6; Mon, 5 Sep 2022 12:25:40 +0800 Message-ID: <4a96523d-6f11-00be-0c37-4716d1289989@amlogic.com> Date: Mon, 5 Sep 2022 12:25:36 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.2.1 Subject: Re: [PATCH v6 2/4] docs/perf: Add documentation for the Amlogic G12 DDR PMU To: Chris Healy CC: linux-kernel , linux ARM , , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Rob Herring , Krzysztof Kozlowski , Will Deacon , Mark Rutland , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , kernel test robot References: <20220901024526.2833232-1-jiucheng.xu@amlogic.com> <20220901024526.2833232-2-jiucheng.xu@amlogic.com> Content-Language: en-US From: Jiucheng Xu In-Reply-To: X-Originating-IP: [10.88.37.128] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220904_212556_908401_80DC7BAB X-CRM114-Status: GOOD ( 17.35 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org On 2022/9/4 1:35, Chris Healy wrote: > [ EXTERNAL EMAIL ] > > On Wed, Aug 31, 2022 at 7:45 PM Jiucheng Xu wrote: >> Add a user guide to show how to use DDR PMU to >> monitor DDR bandwidth on Amlogic G12 SoC >> >> Signed-off-by: Jiucheng Xu >> Reported-by: kernel test robot >> --- >> Changes v6 -> v5: >> - No change >> >> Changes v5 -> v4: >> - Fix building warning >> >> Changes v3 -> v4: >> - No change >> >> Changes v2 -> v3: >> - Rename doc name from aml-ddr-pmu.rst to meson-ddr-pmu.rst >> >> Changes v1 -> v2: >> - Nothing was changed >> --- >> Documentation/admin-guide/perf/index.rst | 1 + >> .../admin-guide/perf/meson-ddr-pmu.rst | 70 +++++++++++++++++++ >> MAINTAINERS | 1 + >> 3 files changed, 72 insertions(+) >> create mode 100644 Documentation/admin-guide/perf/meson-ddr-pmu.rst >> >> diff --git a/Documentation/admin-guide/perf/index.rst b/Documentation/admin-guide/perf/index.rst >> index 69b23f087c05..997a28e156c1 100644 >> --- a/Documentation/admin-guide/perf/index.rst >> +++ b/Documentation/admin-guide/perf/index.rst >> @@ -17,3 +17,4 @@ Performance monitor support >> xgene-pmu >> arm_dsu_pmu >> thunderx2-pmu >> + meson-ddr-pmu >> diff --git a/Documentation/admin-guide/perf/meson-ddr-pmu.rst b/Documentation/admin-guide/perf/meson-ddr-pmu.rst >> new file mode 100644 >> index 000000000000..28e9910940d0 >> --- /dev/null >> +++ b/Documentation/admin-guide/perf/meson-ddr-pmu.rst >> @@ -0,0 +1,70 @@ >> +.. SPDX-License-Identifier: GPL-2.0 >> + >> +=========================================================== >> +Amlogic SoC DDR Bandwidth Performance Monitoring Unit (PMU) >> +=========================================================== >> + >> +There is a bandwidth monitor inside the DRAM contorller. The monitor include > Fix spelling of word "controller" and add an s to the end of include Oh, I will update it in next version. > >> +4 channels which can count the read/write request of accessing DRAM individually. >> +It can be helpful to show if the performance bottleneck is on DDR bandwidth. >> + >> +Currently, this driver supports the following 5 Perf events: >> + >> ++ meson_ddr_bw/total_rw_bytes/ >> ++ meson_ddr_bw/chan_1_rw_bytes/ >> ++ meson_ddr_bw/chan_2_rw_bytes/ >> ++ meson_ddr_bw/chan_3_rw_bytes/ >> ++ meson_ddr_bw/chan_4_rw_bytes/ >> + >> +meson_ddr_bw/chan_{1,2,3,4}_rw_bytes/ events are the channel related events. >> +Each channel support using keywords as filter, which can let the channel >> +to monitor the individual IP module in SoC. >> + >> +The following keywords are the filter: >> + >> ++ arm - DDR access request from CPU >> ++ vpu_read1 - DDR access request from OSD + VPP read >> ++ gpu - DDR access request from 3D GPU >> ++ pcie - DDR access request from PCIe controller >> ++ hdcp - DDR access request from HDCP controller >> ++ hevc_front - DDR access request from HEVC codec front end >> ++ usb3_0 - DDR access request from USB3.0 controller >> ++ hevc_back - DDR access request from HEVC codec back end >> ++ h265enc - DDR access request from HEVC encoder >> ++ vpu_read2 - DDR access request from DI read >> ++ vpu_write1 - DDR access request from VDIN write >> ++ vpu_write2 - DDR access request from di write >> ++ vdec - DDR access request from legacy codec video decoder >> ++ hcodec - DDR access request from H264 encoder >> ++ ge2d - DDR access request from ge2d >> ++ spicc1 - DDR access request from SPI controller 1 >> ++ usb0 - DDR access request from USB2.0 controller 0 >> ++ dma - DDR access request from system DMA controller 1 >> ++ arb0 - DDR access request from arb0 >> ++ sd_emmc_b - DDR access request from SD eMMC b controller >> ++ usb1 - DDR access request from USB2.0 controller 1 >> ++ audio - DDR access request from Audio module >> ++ sd_emmc_c - DDR access request from SD eMMC c controller >> ++ spicc2 - DDR access request from SPI controller 2 >> ++ ethernet - DDR access request from Ethernet controller >> + >> + >> +The following command is to show the total DDR bandwidth: >> + >> + .. code-block:: bash >> + >> + perf stat -a -e meson_ddr_bw/total_rw_bytes/ -I 1000 sleep 10 >> + >> +This command will print the total DDR bandwidth per second. >> + >> +The following commands are to show how to use filter parameters: >> + >> + .. code-block:: bash >> + >> + perf stat -a -e meson_ddr_bw/chan_1_rw_bytes,arm=1/ -I 1000 sleep 10 >> + perf stat -a -e meson_ddr_bw/chan_2_rw_bytes,gpu=1/ -I 1000 sleep 10 >> + perf stat -a -e meson_ddr_bw/chan_3_rw_bytes,arm=1,gpu=1/ -I 1000 sleep 10 >> + >> +The 1st command show how to use channel 1 to monitor the DDR bandwidth from ARM. >> +The 2nd command show using channel 2 to get the DDR bandwidth of GPU. >> +The 3rd command show using channel 3 to monitor the sum of ARM and GPU. >> diff --git a/MAINTAINERS b/MAINTAINERS >> index ac8a98dfbacc..8ee68e699e6d 100644 >> --- a/MAINTAINERS >> +++ b/MAINTAINERS >> @@ -1054,6 +1054,7 @@ AMLOGIC DDR PMU DRIVER >> M: Jiucheng Xu >> S: Supported >> W: http://www.amlogic.com >> +F: Documentation/admin-guide/perf/meson-ddr-pmu.rst >> F: drivers/perf/amlogic/ >> F: include/soc/amlogic/ >> >> -- >> 2.25.1 >> -- Thanks, Jiucheng _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic