From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> 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. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> --- drivers/gpu/drm/i915/i915_drv.h | 8 +++ drivers/gpu/drm/i915/i915_gem.c | 102 ++++++++++++++++++++++++++++++-- 2 files changed, 106 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index b6fa3d45ed22..e663924dfc78 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -204,6 +204,12 @@ struct drm_i915_private; struct i915_mm_struct; struct i915_mmu_object; +struct i915_engine_busy_attribute { + struct device_attribute attr; + struct drm_i915_file_private *file_priv; + unsigned int engine_class; +}; + struct drm_i915_file_private { struct drm_i915_private *dev_priv; struct drm_file *file; @@ -250,10 +256,12 @@ struct drm_i915_file_private { char *name; 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]; } attr; } client; }; diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 03cac6ce0c31..adeba5c1d343 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4834,15 +4834,67 @@ show_client_pid(struct device *kdev, struct device_attribute *attr, char *buf) return snprintf(buf, PAGE_SIZE, "%u", file_priv->client.pid); } +struct busy_ctx { + unsigned int engine_class; + u64 total; +}; + +static int busy_add(int id, void *p, void *data) +{ + struct busy_ctx *bc = data; + struct i915_gem_context *ctx = p; + unsigned int engine_class = bc->engine_class; + struct i915_gem_engines_iter it; + struct intel_context *ce; + uint64_t total = bc->total; + + for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) { + if (ce->engine->uabi_class == engine_class) + total += ktime_to_ns(intel_context_get_busy_time(ce)); + } + i915_gem_context_unlock_engines(ctx); + + bc->total = total; + + return 0; +} + +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); + struct drm_i915_file_private *file_priv = i915_attr->file_priv; + struct busy_ctx bc = { .engine_class = i915_attr->engine_class }; + int ret; + + ret = mutex_lock_interruptible(&file_priv->context_idr_lock); + if (ret) + return ret; + + idr_for_each(&file_priv->context_idr, busy_add, &bc); + + mutex_unlock(&file_priv->context_idr_lock); + + return snprintf(buf, PAGE_SIZE, "%llu\n", bc.total); +} + +static const char *uabi_class_names[] = { + [I915_ENGINE_CLASS_RENDER] = "0", + [I915_ENGINE_CLASS_COPY] = "1", + [I915_ENGINE_CLASS_VIDEO] = "2", + [COPY_ENGINE_CLASS] = "3", +}; + 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; + int i, ret = -ENOMEM; struct device_attribute *attr; - char id[32]; + char idstr[32]; if (!i915->clients.root) goto err_name; @@ -4851,8 +4903,8 @@ i915_gem_add_client(struct drm_i915_private *i915, if (!file_priv->client.name) goto err_name; - snprintf(id, sizeof(id), "%u", serial); - file_priv->client.root = kobject_create_and_add(id, + snprintf(idstr, sizeof(idstr), "%u", serial); + file_priv->client.root = kobject_create_and_add(idstr, i915->clients.root); if (!file_priv->client.root) goto err_client; @@ -4879,10 +4931,44 @@ i915_gem_add_client(struct drm_i915_private *i915, if (ret) goto err_attr_pid; + file_priv->client.busy_root = + kobject_create_and_add("busy", file_priv->client.root); + if (!file_priv->client.busy_root) + goto err_busy_root; + + for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++) { + struct i915_engine_busy_attribute *i915_attr = + &file_priv->client.attr.busy[i]; + + i915_attr->file_priv = file_priv; + i915_attr->engine_class = i; + + attr = &i915_attr->attr; + + 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(file_priv->client.busy_root, + (struct attribute *)attr); + if (ret) + goto err_attr_busy; + } + file_priv->client.pid = pid_nr(get_task_pid(task, PIDTYPE_PID)); return 0; +err_attr_busy: + for (--i; i >= 0; i--) + sysfs_remove_file(file_priv->client.busy_root, + (struct attribute *)&file_priv->client.attr.busy[i]); + kobject_put(file_priv->client.busy_root); +err_busy_root: + sysfs_remove_file(file_priv->client.root, + (struct attribute *)&file_priv->client.attr.pid); err_attr_pid: sysfs_remove_file(file_priv->client.root, (struct attribute *)&file_priv->client.attr.name); @@ -4896,6 +4982,14 @@ i915_gem_add_client(struct drm_i915_private *i915, void i915_gem_remove_client(struct drm_i915_file_private *file_priv) { + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++) + sysfs_remove_file(file_priv->client.busy_root, + (struct attribute *)&file_priv->client.attr.busy[i]); + + kobject_put(file_priv->client.busy_root); + sysfs_remove_file(file_priv->client.root, (struct attribute *)&file_priv->client.attr.pid); sysfs_remove_file(file_priv->client.root, -- 2.19.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx