From patchwork Wed Mar 18 12:11:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Tvrtko Ursulin X-Patchwork-Id: 11445165 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9A40913B1 for ; Wed, 18 Mar 2020 12:12:09 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 819532076E for ; Wed, 18 Mar 2020 12:12:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 819532076E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 03DED6E8CA; Wed, 18 Mar 2020 12:12:09 +0000 (UTC) X-Original-To: Intel-gfx@lists.freedesktop.org Delivered-To: Intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id AA1016E8DA for ; Wed, 18 Mar 2020 12:12:05 +0000 (UTC) IronPort-SDR: YKidjUE1DleTId9WB4QXpjqfjh5LxR6aIVdG63obl3hTlKvrN+qA+vuaVrOGcRWet6ejdJM6/c OcZNIAAS+aSw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Mar 2020 05:12:05 -0700 IronPort-SDR: 5tTRHurDtLypMn0e2qRKeD2zF9LUxl9mYjfv4fv+vVElYtb9rLz819oa3RNRDTaymwulnw6gr3 5at1kmWwUrmQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,567,1574150400"; d="scan'208";a="417926240" Received: from unknown (HELO localhost.localdomain) ([10.214.196.8]) by orsmga005.jf.intel.com with ESMTP; 18 Mar 2020 05:12:03 -0700 From: Tvrtko Ursulin To: Intel-gfx@lists.freedesktop.org Date: Wed, 18 Mar 2020 12:11:37 +0000 Message-Id: <20200318121138.909-9-tvrtko.ursulin@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200318121138.909-1-tvrtko.ursulin@linux.intel.com> References: <20200318121138.909-1-tvrtko.ursulin@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 08/10] drm/i915: Expose per-engine client busyness X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Tvrtko Ursulin Expose per-client and per-engine busyness under the previously added sysfs client root. The new files are one per-engine instance and located under the 'busy' directory. Each contains a monotonically increasing nano-second resolution times each client's jobs were executing on the GPU. This enables userspace to create a top-like tool for GPU utilization: ========================================================================== intel-gpu-top - 935/ 935 MHz; 0% RC6; 14.73 Watts; 1097 irqs/s IMC reads: 1401 MiB/s IMC writes: 4 MiB/s ENGINE BUSY MI_SEMA MI_WAIT Render/3D/0 63.73% |███████████████████ | 3% 0% Blitter/0 9.53% |██▊ | 6% 0% Video/0 39.32% |███████████▊ | 16% 0% Video/1 15.62% |████▋ | 0% 0% VideoEnhance/0 0.00% | | 0% 0% PID NAME RCS BCS VCS VECS 4084 gem_wsim |█████▌ ||█ || || | 4086 gem_wsim |█▌ || ||███ || | ========================================================================== v2: Use intel_context_engine_get_busy_time. v3: New directory structure. v4: Rebase. v5: sysfs_attr_init. v6: Small tidy in i915_gem_add_client. v7: Rebase to be engine class based. v8: * Always enable stats. * Walk all client contexts. v9: * Skip unsupported engine classes. (Chris) * Use scheduler caps. (Chris) v10: * Use pphwsp runtime only. Signed-off-by: Tvrtko Ursulin --- drivers/gpu/drm/i915/i915_drm_client.c | 110 ++++++++++++++++++++++++- drivers/gpu/drm/i915/i915_drm_client.h | 11 +++ 2 files changed, 120 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c index c88d9ff448e0..0a2d933fe83c 100644 --- a/drivers/gpu/drm/i915/i915_drm_client.c +++ b/drivers/gpu/drm/i915/i915_drm_client.c @@ -9,8 +9,13 @@ #include +#include + #include "i915_drv.h" #include "i915_drm_client.h" +#include "gem/i915_gem_context.h" +#include "gt/intel_engine_user.h" +#include "i915_drv.h" #include "i915_gem.h" #include "i915_utils.h" @@ -52,6 +57,104 @@ show_client_pid(struct device *kdev, struct device_attribute *attr, char *buf) return ret; } +static u64 +pphwsp_busy_add(struct i915_gem_context *ctx, unsigned int class) +{ + struct i915_gem_engines *engines = rcu_dereference(ctx->engines); + struct i915_gem_engines_iter it; + struct intel_context *ce; + u64 total = 0; + + for_each_gem_engine(ce, engines, it) { + if (ce->engine->uabi_class == class) + total += ce->runtime.total; + } + + return total; +} + +static ssize_t +show_client_busy(struct device *kdev, struct device_attribute *attr, char *buf) +{ + struct i915_engine_busy_attribute *i915_attr = + container_of(attr, typeof(*i915_attr), attr); + unsigned int class = i915_attr->engine_class; + struct i915_drm_client *client = i915_attr->client; + u64 total = atomic64_read(&client->past_runtime[class]); + struct list_head *list = &client->ctx_list; + struct i915_gem_context *ctx; + + rcu_read_lock(); + list_for_each_entry_rcu(ctx, list, client_link) { + total += atomic64_read(&ctx->past_runtime[class]); + total += pphwsp_busy_add(ctx, class); + } + rcu_read_unlock(); + + total *= RUNTIME_INFO(i915_attr->i915)->cs_timestamp_period_ns; + + return snprintf(buf, PAGE_SIZE, "%llu\n", total); +} + +static const char * const uabi_class_names[] = { + [I915_ENGINE_CLASS_RENDER] = "0", + [I915_ENGINE_CLASS_COPY] = "1", + [I915_ENGINE_CLASS_VIDEO] = "2", + [I915_ENGINE_CLASS_VIDEO_ENHANCE] = "3", +}; + +static int +__client_register_sysfs_busy(struct i915_drm_client *client) +{ + struct i915_drm_clients *clients = client->clients; + struct drm_i915_private *i915 = + container_of(clients, typeof(*i915), clients); + unsigned int i; + int ret = 0; + + if (!HAS_LOGICAL_RING_CONTEXTS(i915)) + return 0; + + client->busy_root = kobject_create_and_add("busy", client->root); + if (!client->busy_root) + return -ENOMEM; + + for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++) { + struct i915_engine_busy_attribute *i915_attr = + &client->attr.busy[i]; + struct device_attribute *attr = &i915_attr->attr; + + if (!intel_engine_lookup_user(i915, i, 0)) + continue; + + i915_attr->client = client; + i915_attr->i915 = i915; + i915_attr->engine_class = i; + + sysfs_attr_init(&attr->attr); + + attr->attr.name = uabi_class_names[i]; + attr->attr.mode = 0444; + attr->show = show_client_busy; + + ret = sysfs_create_file(client->busy_root, + (struct attribute *)attr); + if (ret) + goto err; + } + + return 0; + +err: + kobject_put(client->busy_root); + return ret; +} + +static void __client_unregister_sysfs_busy(struct i915_drm_client *client) +{ + kobject_put(fetch_and_zero(&client->busy_root)); +} + static int __client_register_sysfs(struct i915_drm_client *client) { @@ -88,9 +191,12 @@ __client_register_sysfs(struct i915_drm_client *client) ret = sysfs_create_file(client->root, (struct attribute *)attr); if (ret) - break; + goto out; } + ret = __client_register_sysfs_busy(client); + +out: if (ret) kobject_put(client->root); @@ -99,6 +205,8 @@ __client_register_sysfs(struct i915_drm_client *client) static void __client_unregister_sysfs(struct i915_drm_client *client) { + __client_unregister_sysfs_busy(client); + kobject_put(fetch_and_zero(&client->root)); } diff --git a/drivers/gpu/drm/i915/i915_drm_client.h b/drivers/gpu/drm/i915/i915_drm_client.h index 0be27aa9bbda..98c5fc24fcb4 100644 --- a/drivers/gpu/drm/i915/i915_drm_client.h +++ b/drivers/gpu/drm/i915/i915_drm_client.h @@ -26,6 +26,15 @@ struct i915_drm_clients { struct kobject *root; }; +struct i915_drm_client; + +struct i915_engine_busy_attribute { + struct device_attribute attr; + struct drm_i915_private *i915; + struct i915_drm_client *client; + unsigned int engine_class; +}; + struct i915_drm_client { struct kref kref; @@ -44,9 +53,11 @@ struct i915_drm_client { struct i915_drm_clients *clients; struct kobject *root; + struct kobject *busy_root; struct { struct device_attribute pid; struct device_attribute name; + struct i915_engine_busy_attribute busy[MAX_ENGINE_CLASS + 1]; } attr; /**