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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 42636E732C5 for ; Thu, 28 Sep 2023 11:26:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231770AbjI1L0y (ORCPT ); Thu, 28 Sep 2023 07:26:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55490 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232573AbjI1L02 (ORCPT ); Thu, 28 Sep 2023 07:26:28 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3C0351A5; Thu, 28 Sep 2023 04:24:54 -0700 (PDT) Received: from [192.168.1.100] (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id B1C106607337; Thu, 28 Sep 2023 12:24:51 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1695900292; bh=CppPHmkoLt+zjmY2qAg60/g1MggRcPf5o7BrilZYcSM=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=NsftOWZCWUP2/39arzsyP0pYJZPB9p7utGw2Z/2IiqZb7hZM5lDxEd/KLlSOzY2pn mKVHuopcahUsicUAE8y4EPA/gRHwbvPuCY1bKnnyJOHaSH+QFYqsJwWncfIy/oCnR3 ceoMqcG3ODtVkGg8GCuKkcub4N4h4+OtWzhYkdnovbGRkdeED+uBISZJEtMat3zYuW OMO4Oi17EDMX2cS0ULtKlm3zO2t6W7T+T7rXD74kAhWeXWb4eFDiVnky9+6GkHnxTa jSDCcozJyMNUeuhUBk3imaFOGo04EH/V/LsisDbHBDFvQ8aFjn4Xko+cZNgwl1IIDT zgIt+K/jVXYBA== Message-ID: Date: Thu, 28 Sep 2023 13:24:48 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.0 Subject: Re: [PATCH v7 4/5] drm/drm_file: Add DRM obj's RSS reporting function for fdinfo Content-Language: en-US To: =?UTF-8?Q?Adri=c3=a1n_Larumbe?= , maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, robdclark@gmail.com, quic_abhinavk@quicinc.com, dmitry.baryshkov@linaro.org, sean@poorly.run, marijn.suijten@somainline.org, robh@kernel.org, steven.price@arm.com Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, healych@amazon.com, kernel@collabora.com, tvrtko.ursulin@linux.intel.com, boris.brezillon@collabora.com References: <20230927213133.1651169-1-adrian.larumbe@collabora.com> <20230927213133.1651169-5-adrian.larumbe@collabora.com> From: AngeloGioacchino Del Regno In-Reply-To: <20230927213133.1651169-5-adrian.larumbe@collabora.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Il 27/09/23 23:29, Adrián Larumbe ha scritto: > Some BO's might be mapped onto physical memory chunkwise and on demand, > like Panfrost's tiler heap. In this case, even though the > drm_gem_shmem_object page array might already be allocated, only a very > small fraction of the BO is currently backed by system memory, but > drm_show_memory_stats will then proceed to add its entire virtual size to > the file's total resident size regardless. > > This led to very unrealistic RSS sizes being reckoned for Panfrost, where > said tiler heap buffer is initially allocated with a virtual size of 128 > MiB, but only a small part of it will eventually be backed by system memory > after successive GPU page faults. > > Provide a new DRM object generic function that would allow drivers to > return a more accurate RSS and purgeable sizes for their BOs. > > Signed-off-by: Adrián Larumbe > Reviewed-by: Boris Brezillon > Reviewed-by: Steven Price Reviewed-by: AngeloGioacchino Del Regno