From patchwork Tue Sep 19 23:34:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Adri=C3=A1n_Larumbe?= X-Patchwork-Id: 13392004 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 9FC3CCE79AE for ; Tue, 19 Sep 2023 23:36:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229521AbjISXgQ (ORCPT ); Tue, 19 Sep 2023 19:36:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233061AbjISXgN (ORCPT ); Tue, 19 Sep 2023 19:36:13 -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 BDB93CE; Tue, 19 Sep 2023 16:36:07 -0700 (PDT) Received: from localhost.localdomain (unknown [IPv6:2a02:8010:65b5:0:1ac0:4dff:feee:236a]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: alarumbe) by madras.collabora.co.uk (Postfix) with ESMTPSA id 34ADE6607083; Wed, 20 Sep 2023 00:36:06 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1695166566; bh=WfmVqHp4HoJXfVeYE4CYy4eKkMUnawX/XEzu8rruf8M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M5CB5UvA5bECx5iHWKHHROxLc3ssUZ7NVNy2A6FCxMFv9Mw9/nfsItnoj7fMdcrnc QJ9p7so/hyytmlx+/JmFvlBUT5ncB7u9kuN8YHVPhcTJ9yFJnLm2/xY5a3VfuyDj9I m63jg2JFP6eCw6QqgPc995qVwseFtiO9NeXUs44r30NHe4Q1hzOly0hGG8fjWnm0ev VwpRGcASccjmvsPZKiSWeffEE2A868udfqBsiPRMSTfVoYqIhvSOTlni8Fzm4pO6Lo dmWxnP81ZOfxSuUJXbJyCsWc8FSzo7DK6m/xVV+/aM6Hyg4bm09M0sOWpGOVkaCYKR RcTwDmepl/6uA== From: =?utf-8?q?Adri=C3=A1n_Larumbe?= To: 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: adrian.larumbe@collabora.com, 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, Boris Brezillon Subject: [PATCH v6 4/6] drm/drm_file: Add DRM obj's RSS reporting function for fdinfo Date: Wed, 20 Sep 2023 00:34:52 +0100 Message-ID: <20230919233556.1458793-5-adrian.larumbe@collabora.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230919233556.1458793-1-adrian.larumbe@collabora.com> References: <20230919233556.1458793-1-adrian.larumbe@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org 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 size for their BOs. Signed-off-by: Adrián Larumbe Reviewed-by: Boris Brezillon Reviewed-by: Steven Price --- drivers/gpu/drm/drm_file.c | 5 ++++- include/drm/drm_gem.h | 9 +++++++++ 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c index 883d83bc0e3d..762965e3d503 100644 --- a/drivers/gpu/drm/drm_file.c +++ b/drivers/gpu/drm/drm_file.c @@ -944,7 +944,10 @@ void drm_show_memory_stats(struct drm_printer *p, struct drm_file *file) } if (s & DRM_GEM_OBJECT_RESIDENT) { - status.resident += obj->size; + if (obj->funcs && obj->funcs->rss) + status.resident += obj->funcs->rss(obj); + else + status.resident += obj->size; } else { /* If already purged or not yet backed by pages, don't * count it as purgeable: diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index bc9f6aa2f3fe..16364487fde9 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -208,6 +208,15 @@ struct drm_gem_object_funcs { */ enum drm_gem_object_status (*status)(struct drm_gem_object *obj); + /** + * @rss: + * + * Return resident size of the object in physical memory. + * + * Called by drm_show_memory_stats(). + */ + size_t (*rss)(struct drm_gem_object *obj); + /** * @vm_ops: *