From patchwork Tue Jul 26 18:21:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andr=C3=A9_Almeida?= X-Patchwork-Id: 12929688 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 62826C19F29 for ; Tue, 26 Jul 2022 18:23:20 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0D11697A59; Tue, 26 Jul 2022 18:23:18 +0000 (UTC) Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) by gabe.freedesktop.org (Postfix) with ESMTPS id A08D99775F; Tue, 26 Jul 2022 18:23:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=ciDPhF07fS+tRj3SbXyJWbm9upDSDTB8l7rbsGiPQ3k=; b=HonnJmwDnytfcoTbVHoLE3mgX0 lcMlhkhvqTsXNkBGMdFPqQ93L1kBh1dV0CRrxL9rAHgFFsmdES4PJTyjvaVmm2KZ2+3CEWvCDLEDw K6hnBDsnv22F6NxxkjIsklTgXVcW4Rqrog04d0nacSx2c4sroNW1F8VsdWUddNE3MofdBGjoZ73Db P+2GyLpHBZElYEr5k9BmHeil6vp0UyNIK4z6Ewb6yajipHVteL7Lo4eEk917qCSp7D6NF4WYLi4Il Wroc3Om0g6NK8wYZIJlwacrEwW/xZ6rOtnv67ByyHMJC3B/7WiKMrKtdH5kvDMuZrWksr1JqZuLL6 ztGiztzg==; Received: from 201-13-50-220.dsl.telesp.net.br ([201.13.50.220] helo=localhost.localdomain) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1oGPCx-007aEh-7i; Tue, 26 Jul 2022 20:23:04 +0200 From: =?utf-8?q?Andr=C3=A9_Almeida?= To: Alex Deucher , =?utf-8?b?J0NocmlzdGlhbiBLw7Zu?= =?utf-8?b?aWcn?= , 'Pan Xinhui' , David Airlie , Daniel Vetter , Hawking Zhang , Tao Zhou , Felix Kuehling , Jack Xiao , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Tom St Denis , Rodrigo Siqueira Subject: [PATCH v2 3/4] Documentation/gpu: Document GFXOFF's count and residency Date: Tue, 26 Jul 2022 15:21:51 -0300 Message-Id: <20220726182152.123649-4-andrealmeid@igalia.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220726182152.123649-1-andrealmeid@igalia.com> References: <20220726182152.123649-1-andrealmeid@igalia.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Andr=C3=A9_Almeida?= , kernel-dev@igalia.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add documentation explaining those two new files. While here, add a note about the value type. Signed-off-by: André Almeida --- Documentation/gpu/amdgpu/thermal.rst | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/Documentation/gpu/amdgpu/thermal.rst b/Documentation/gpu/amdgpu/thermal.rst index 997231b6adcf..5e27e4eb3959 100644 --- a/Documentation/gpu/amdgpu/thermal.rst +++ b/Documentation/gpu/amdgpu/thermal.rst @@ -72,7 +72,8 @@ card's RLC (RunList Controller) firmware powers off the gfx engine dynamically when there is no workload on gfx or compute pipes. GFXOFF is on by default on supported GPUs. -Userspace can interact with GFXOFF through a debugfs interface: +Userspace can interact with GFXOFF through a debugfs interface (all values in +`uint32_t`, unless otherwise noted): ``amdgpu_gfxoff`` ----------------- @@ -104,3 +105,18 @@ Read it to check current GFXOFF's status of a GPU:: If GFXOFF is enabled, the value will be transitioning around [0, 3], always getting into 0 when possible. When it's disabled, it's always at 2. Returns ``-EINVAL`` if it's not supported. + +``amdgpu_gfxoff_count`` +----------------------- + +Read it to get the total GFXOFF entry count at the time of query since system +power-up. The value is an `uint64_t` type, however, due to firmware limitations, +it can currently overflow as an `uint32_t`. *Only supported in vangogh* + +``amdgpu_gfxoff_residency`` +--------------------------- + +Write 1 to amdgpu_gfxoff_residency to start logging, and 0 to stop. Read it to +get average GFXOFF residency % multiplied by 100 during the last logging +interval. E.g. a value of 7854 means 78.54% of the time in the last logging +interval the GPU was in GFXOFF mode. *Only supported in vangogh*