Commit 2db8e9d6 authored by Chris Wilson's avatar Chris Wilson Committed by Daniel Vetter
Browse files

drm/i915: Track clients and print their object usage in debugfs 



By stashing a pointer of who opened the device and keeping a list of
open fd, we can then walk each client and inspect how many objects they
have open. For example,

i915_gem_objects:
1102 objects, 613646336 bytes
663 [662] objects, 468783104 [468750336] bytes in gtt
  37 [37] active objects, 46874624 [46874624] bytes
  626 [625] inactive objects, 421908480 [421875712] bytes
282 unbound objects, 6512640 bytes
85 purgeable objects, 6787072 bytes
28 pinned mappable objects, 3686400 bytes
40 fault mappable objects, 27783168 bytes
2145386496 [536870912] gtt total

Xorg: 43 objects, 32243712 bytes (10223616 active, 16683008 inactive, 4096 unbound)
gnome-shell: 30 objects, 28381184 bytes (0 active, 28336128 inactive, 0 unbound)
xonotic-linux64: 1032 objects, 569933824 bytes (46874624 active, 383545344 inactive, 6508544 unbound)

v2: Use existing drm->filelist as pointed out by Ben.
v3: Not even stashing the task_struct is required as Ben pointed out
    drm_file->pid.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarBen Widawsky <ben@bwidawsk.net>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent ef1b460d

drivers/gpu/drm/i915/i915_debugfs.c

+42 −0
Original line number Diff line number Diff line
@@ -196,6 +196,32 @@ static int i915_gem_object_list_info(struct seq_file *m, void *data) 
	} \

} while (0)



struct file_stats {

	int count;

	size_t total, active, inactive, unbound;

};



static int per_file_stats(int id, void *ptr, void *data)

{

	struct drm_i915_gem_object *obj = ptr;

	struct file_stats *stats = data;



	stats->count++;

	stats->total += obj->base.size;



	if (obj->gtt_space) {

		if (!list_empty(&obj->ring_list))

			stats->active += obj->base.size;

		else

			stats->inactive += obj->base.size;

	} else {

		if (!list_empty(&obj->global_list))

			stats->unbound += obj->base.size;

	}



	return 0;

}



static int i915_gem_object_info(struct seq_file *m, void* data)

{

	struct drm_info_node *node = (struct drm_info_node *) m->private;
@@ -204,6 +230,7 @@ static int i915_gem_object_info(struct seq_file *m, void* data) 
	u32 count, mappable_count, purgeable_count;

	size_t size, mappable_size, purgeable_size;

	struct drm_i915_gem_object *obj;

	struct drm_file *file;

	int ret;



	ret = mutex_lock_interruptible(&dev->struct_mutex);
@@ -263,6 +290,21 @@ static int i915_gem_object_info(struct seq_file *m, void* data) 
		   dev_priv->gtt.total,

		   dev_priv->gtt.mappable_end - dev_priv->gtt.start);



	seq_printf(m, "\n");

	list_for_each_entry_reverse(file, &dev->filelist, lhead) {

		struct file_stats stats;



		memset(&stats, 0, sizeof(stats));

		idr_for_each(&file->object_idr, per_file_stats, &stats);

		seq_printf(m, "%s: %u objects, %zu bytes (%zu active, %zu inactive, %zu unbound)\n",

			   get_pid_task(file->pid, PIDTYPE_PID)->comm,

			   stats.count,

			   stats.total,

			   stats.active,

			   stats.inactive,

			   stats.unbound);

	}



	mutex_unlock(&dev->struct_mutex);



	return 0;