From patchwork Wed Oct 3 12:04:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tvrtko Ursulin X-Patchwork-Id: 10624721 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CF22513BB for ; Wed, 3 Oct 2018 12:04:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C200828944 for ; Wed, 3 Oct 2018 12:04:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B5EAC28957; Wed, 3 Oct 2018 12:04:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CD47128944 for ; Wed, 3 Oct 2018 12:04:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CC4636E46B; Wed, 3 Oct 2018 12:04:39 +0000 (UTC) X-Original-To: Intel-gfx@lists.freedesktop.org Delivered-To: Intel-gfx@lists.freedesktop.org Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by gabe.freedesktop.org (Postfix) with ESMTPS id E77E86E45B for ; Wed, 3 Oct 2018 12:04:23 +0000 (UTC) Received: by mail-wr1-x443.google.com with SMTP id u12-v6so5814287wrr.4 for ; Wed, 03 Oct 2018 05:04:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=peixEgXVSbA+FCUOs7LR9DtkGW5vpWZGT7eWkk+a8Zk=; b=bneJG8wtqDfVbnktT+I5kLjvkwOUHS5hNrPnOdP+J2wgh1M/r8rRx+LkwhHbBPhyoE fGzyklwPickay076DlfEq0cRslxUUlyaEPNccK/T5jfPNqqwqYEzZ53gabrikv4EDJsi vFNiRAAh3ScI2a/aGh/NdwBW/4w7YxovHPBgDZK2WIYZ8u4qQK3UOf4jYr64qrAmh0Gs i7BlX1hX7Z/6wZVgprRKpayP+o5CVXv9sIVsfzCqugI1FYbAECZtVYjMtmAlTHwl3iZN iJh3AkUdsS56ySjo9Bisqo8k3eSDjlCadQVf7SEGfl5BG6myolnaq1eNpC6YZbY9knUX 34Tg== X-Gm-Message-State: ABuFfojziitW6BX58TQLMcO/dTjFupe+3abTaVpM12FtCwBUIFfQitgU 2kb7FvTlGwFOQEFLJe6+dBd84slDU2w= X-Google-Smtp-Source: ACcGV61uGaSFGQmQOjNrhA699K7MInu1gXLY4lJVyZqrNwgrkudAdROglTiZWyglQGele/HCwqO0Sw== X-Received: by 2002:adf:8103:: with SMTP id 3-v6mr1042036wrm.106.1538568262273; Wed, 03 Oct 2018 05:04:22 -0700 (PDT) Received: from localhost.localdomain ([95.144.165.37]) by smtp.gmail.com with ESMTPSA id f69-v6sm866657wmf.34.2018.10.03.05.04.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 03 Oct 2018 05:04:21 -0700 (PDT) From: Tvrtko Ursulin X-Google-Original-From: Tvrtko Ursulin To: Intel-gfx@lists.freedesktop.org Date: Wed, 3 Oct 2018 13:04:03 +0100 Message-Id: <20181003120406.6784-11-tvrtko.ursulin@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181003120406.6784-1-tvrtko.ursulin@linux.intel.com> References: <20181003120406.6784-1-tvrtko.ursulin@linux.intel.com> Subject: [Intel-gfx] [RFC 10/13] drm/i915: Expose list of clients in sysfs X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP From: Tvrtko Ursulin Expose a list of clients with open file handles in sysfs. This will be a basis for a top-like utility showing per-client and per- engine GPU load. Currently we only expose each client's pid and name under opaque numbered directories in /sys/class/drm/card0/clients/. For instance: /sys/class/drm/card0/clients/3/name: Xorg /sys/class/drm/card0/clients/3/pid: 5664 v2: Chris Wilson: * Enclose new members into dedicated structs. * Protect against failed sysfs registration. v3: * sysfs_attr_init. Signed-off-by: Tvrtko Ursulin --- drivers/gpu/drm/i915/i915_drv.h | 19 +++++ drivers/gpu/drm/i915/i915_gem.c | 121 ++++++++++++++++++++++++++++-- drivers/gpu/drm/i915/i915_sysfs.c | 8 ++ 3 files changed, 140 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 2264b30ce51a..f7022533eab1 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -367,6 +367,20 @@ struct drm_i915_file_private { /** ban_score: Accumulated score of all ctx bans and fast hangs. */ atomic_t ban_score; unsigned long hang_timestamp; + + struct i915_drm_client { + unsigned int id; + + pid_t pid; + char *name; + + struct kobject *root; + + struct { + struct device_attribute pid; + struct device_attribute name; + } attr; + } client; }; /* Interface history: @@ -2171,6 +2185,11 @@ struct drm_i915_private { struct i915_pmu pmu; + struct i915_drm_clients { + struct kobject *root; + atomic_t serial; + } clients; + /* * NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch * will be rejected. Instead look for a better place. diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index d3a730f6ef65..44a875863401 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -5888,6 +5888,96 @@ int i915_gem_freeze_late(struct drm_i915_private *i915) return 0; } +static ssize_t +show_client_name(struct device *kdev, struct device_attribute *attr, char *buf) +{ + struct drm_i915_file_private *file_priv = + container_of(attr, struct drm_i915_file_private, + client.attr.name); + + return snprintf(buf, PAGE_SIZE, "%s", file_priv->client.name); +} + +static ssize_t +show_client_pid(struct device *kdev, struct device_attribute *attr, char *buf) +{ + struct drm_i915_file_private *file_priv = + container_of(attr, struct drm_i915_file_private, + client.attr.pid); + + return snprintf(buf, PAGE_SIZE, "%u", file_priv->client.pid); +} + +static int +i915_gem_add_client(struct drm_i915_private *i915, + struct drm_i915_file_private *file_priv, + struct task_struct *task, + unsigned int serial) +{ + int ret = -ENOMEM; + struct device_attribute *attr; + char id[32]; + + if (!i915->clients.root) + goto err_name; + + file_priv->client.name = kstrdup(task->comm, GFP_KERNEL); + if (!file_priv->client.name) + goto err_name; + + snprintf(id, sizeof(id), "%u", serial); + file_priv->client.root = kobject_create_and_add(id, + i915->clients.root); + if (!file_priv->client.root) + goto err_client; + + attr = &file_priv->client.attr.name; + sysfs_attr_init(&attr->attr); + attr->attr.name = "name"; + attr->attr.mode = 0444; + attr->show = show_client_name; + + ret = sysfs_create_file(file_priv->client.root, + (struct attribute *)attr); + if (ret) + goto err_attr_name; + + attr = &file_priv->client.attr.pid; + sysfs_attr_init(&attr->attr); + attr->attr.name = "pid"; + attr->attr.mode = 0444; + attr->show = show_client_pid; + + ret = sysfs_create_file(file_priv->client.root, + (struct attribute *)attr); + if (ret) + goto err_attr_pid; + + file_priv->client.pid = pid_nr(get_task_pid(task, PIDTYPE_PID)); + + return 0; + +err_attr_pid: + sysfs_remove_file(file_priv->client.root, + (struct attribute *)&file_priv->client.attr.name); +err_attr_name: + kobject_put(file_priv->client.root); +err_client: + kfree(file_priv->client.name); +err_name: + return ret; +} + +static void i915_gem_remove_client(struct drm_i915_file_private *file_priv) +{ + sysfs_remove_file(file_priv->client.root, + (struct attribute *)&file_priv->client.attr.pid); + sysfs_remove_file(file_priv->client.root, + (struct attribute *)&file_priv->client.attr.name); + kobject_put(file_priv->client.root); + kfree(file_priv->client.name); +} + void i915_gem_release(struct drm_device *dev, struct drm_file *file) { struct drm_i915_file_private *file_priv = file->driver_priv; @@ -5901,33 +5991,48 @@ void i915_gem_release(struct drm_device *dev, struct drm_file *file) list_for_each_entry(request, &file_priv->mm.request_list, client_link) request->file_priv = NULL; spin_unlock(&file_priv->mm.lock); + + i915_gem_remove_client(file_priv); } int i915_gem_open(struct drm_i915_private *i915, struct drm_file *file) { + int ret = -ENOMEM; struct drm_i915_file_private *file_priv; - int ret; DRM_DEBUG("\n"); file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); if (!file_priv) - return -ENOMEM; + goto err_alloc; + + file_priv->client.id = atomic_inc_return(&i915->clients.serial); + ret = i915_gem_add_client(i915, file_priv, current, + file_priv->client.id); + if (ret) + goto err_client; file->driver_priv = file_priv; + ret = i915_gem_context_open(i915, file); + if (ret) + goto err_context; + file_priv->dev_priv = i915; file_priv->file = file; + file_priv->bsd_engine = -1; + file_priv->hang_timestamp = jiffies; spin_lock_init(&file_priv->mm.lock); INIT_LIST_HEAD(&file_priv->mm.request_list); - file_priv->bsd_engine = -1; - file_priv->hang_timestamp = jiffies; - - ret = i915_gem_context_open(i915, file); - if (ret) - kfree(file_priv); + return 0; +err_context: + i915_gem_remove_client(file_priv); +err_client: + atomic_dec(&i915->clients.serial); + kfree(file_priv); +err_alloc: return ret; } diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c index e5e6f6bb2b05..d809259456ef 100644 --- a/drivers/gpu/drm/i915/i915_sysfs.c +++ b/drivers/gpu/drm/i915/i915_sysfs.c @@ -581,6 +581,11 @@ void i915_setup_sysfs(struct drm_i915_private *dev_priv) struct device *kdev = dev_priv->drm.primary->kdev; int ret; + dev_priv->clients.root = + kobject_create_and_add("clients", &kdev->kobj); + if (!dev_priv->clients.root) + DRM_ERROR("Per-client sysfs setup failed\n"); + #ifdef CONFIG_PM if (HAS_RC6(dev_priv)) { ret = sysfs_merge_group(&kdev->kobj, @@ -641,4 +646,7 @@ void i915_teardown_sysfs(struct drm_i915_private *dev_priv) sysfs_unmerge_group(&kdev->kobj, &rc6_attr_group); sysfs_unmerge_group(&kdev->kobj, &rc6p_attr_group); #endif + + if (dev_priv->clients.root) + kobject_put(dev_priv->clients.root); }