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 B07E9ECAAD5 for ; Mon, 5 Sep 2022 07:58:18 +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=s5mvMD0nnSd542uHGinBLGZtILRefuMoeOMOHoHuFD4=; b=s6I9O9u5mCgoNP rTJfjwT8N1C2Jk3paG/9oFOMlXa/WmCXfdNW3xMLhdwkICeG5V4T9CB5l7ZMZFpQIVXKDcI1vJ5Je jaXRERV3+S0/vQgX00JNuLqw8ZGqyeppJVZwnEPGXFwuY9hHzjH8Vrkls0tLKQF3tj8ES0t7paH/z u+O+RXs39Emciuq5r4A0wFkn4TGY1GrNBY8eTwClLIOSWI3TW40KbIhfeih/5G4i5P++QTzwtV/Gh Pgj8wxJYss9tOy/md5K79hrk9eB4Ia0rqU1zR8n2tM3zwZoUm6L2Vv4ruvOSYCUf0Imv/t63Ns0up LfS4521e9piR9RiHqvoA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oV6zd-00DqU4-NN; Mon, 05 Sep 2022 07:58:06 +0000 Received: from mail-wr1-x429.google.com ([2a00:1450:4864:20::429]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oV6Kq-00D5p1-2J for linux-amlogic@lists.infradead.org; Mon, 05 Sep 2022 07:16:05 +0000 Received: by mail-wr1-x429.google.com with SMTP id b5so10053839wrr.5 for ; Mon, 05 Sep 2022 00:15:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:in-reply-to:organization:from:references :cc:to:content-language:subject:user-agent:mime-version:date :message-id:from:to:cc:subject:date; bh=LvkdhQt9U7FwpSw5oGil04BEBWuHJyg4UYV++2Rwli0=; b=0rnrmyUF1wHBQmVpuhphEhKxh0LoUI2nl5vCDnWvCwY8z+jvSk6GjAGJlceNGVNf7j KESM/LTHGGBTsQagPG9L6DfD3UWDUqa8knHG8sMMc4aSmvxkdtBr5lMZLnUNQUzJSEcb Qpc4IAAjTfwqtPmXWNn4i5IfSpV7AkGFmozBFGomRblmY5BvQapUgiYzoel/+voB2XJD DPdiJoPi7xq+knz1B4t8SUL3ZmJTtD2TiBHBzL9Gb2MWSCy8CQb6tqRrQR9tTJXZ21vR COnCIEGaX1OY19a0oLDGCaZKgo5CrgWVrY0k+4HdWreRDozkTpzWgIcQPeYEtly0OVoe 2b7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:organization:from:references :cc:to:content-language:subject:user-agent:mime-version:date :message-id:x-gm-message-state:from:to:cc:subject:date; bh=LvkdhQt9U7FwpSw5oGil04BEBWuHJyg4UYV++2Rwli0=; b=ORHghpsRHNh8aMsAAgfFf9OhznKigaupfD6bc99N0Csna/K3bJhCwyHbf2V06D07vV +Jc9wrsNOx5cBQt5oaxz9aeJLJONVJbSlPcNw1CtaBv4ZA/XskJk1j+iql980xkMx/O5 L4VhRSXWQ2ZwScZjkIZ+JsCsfiSDy5QgFPsBcMAZPX5+pbWDxsQ1m0s5Dcu8A7uGbt8k YK0vlbM0kgVp9426WWeGXvW3XTckto67octKekOu9IfCi+NBHwifkb1lXdCSnN0gi2wW 1qJ6ieAaPX5jQE0fhR0upektcC8m7wlsKU+pkVAbBOgQl1rAKoUBy+ercuYOXsqpEr+X yD3w== X-Gm-Message-State: ACgBeo0V+soAl8rNIw3VkxMN3amTJTdjoU1qqSDya9ncIYkVR4fF1o9F kvNj9md9Hv2OA0J1/UGcWNGNfYlcfcq/pIbi X-Google-Smtp-Source: AA6agR6Ckyoz4nVDwR7KXJbk3cH/sMw9PaPACpNIr4KZIUYOGs3sFnKp77JorSOPsdAX6n5U4ek0nA== X-Received: by 2002:a05:6000:1a86:b0:226:fd9b:7357 with SMTP id f6-20020a0560001a8600b00226fd9b7357mr9534983wry.458.1662362152193; Mon, 05 Sep 2022 00:15:52 -0700 (PDT) Received: from ?IPV6:2a01:e0a:982:cbb0:f365:27e9:453c:4c15? ([2a01:e0a:982:cbb0:f365:27e9:453c:4c15]) by smtp.gmail.com with ESMTPSA id e2-20020a5d5942000000b00226f39d1a3esm8050055wri.73.2022.09.05.00.15.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 05 Sep 2022 00:15:51 -0700 (PDT) Message-ID: <6ceffaed-00c1-3b62-9c0e-95349bfb2957@baylibre.com> Date: Mon, 5 Sep 2022 09:15:50 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH v6 2/4] docs/perf: Add documentation for the Amlogic G12 DDR PMU Content-Language: en-US To: Jiucheng Xu , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org Cc: Rob Herring , Krzysztof Kozlowski , Will Deacon , Mark Rutland , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Chris Healy , kernel test robot References: <20220901024526.2833232-1-jiucheng.xu@amlogic.com> <20220901024526.2833232-2-jiucheng.xu@amlogic.com> From: Neil Armstrong Organization: Baylibre In-Reply-To: <20220901024526.2833232-2-jiucheng.xu@amlogic.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220905_001557_567451_9716DD37 X-CRM114-Status: GOOD ( 25.21 ) 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 01/09/2022 04:45, 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 Same as patch 1, please drop this Reported-by tags. > --- > 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 > +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/ > Thanks, Neil _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic