[PATCH 6/6] drm/i915: Implement fdinfo memory stats printing

[Iddamsetty, Aravind]

On 22-09-2023 19:17, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> Use the newly added drm_print_memory_stats helper to show memory
> utilisation of our objects in drm/driver specific fdinfo output.
> 
> To collect the stats we walk the per memory regions object lists
> and accumulate object size into the respective drm_memory_stats
> categories.
> 
> v2:
>  * Only account against the active region.
>  * Use DMA_RESV_USAGE_BOOKKEEP when testing for active. (Tejas)
> 
> v3:
>  * Update commit text. (Aravind)
>  * Update to use memory regions uabi names.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Aravind Iddamsetty <aravind.iddamsetty at intel.com>
> Cc: Rob Clark <robdclark at gmail.com>
> Cc: Andi Shyti <andi.shyti at linux.intel.com>
> Cc: Tejas Upadhyay <tejas.upadhyay at intel.com>
> Reviewed-by: Andi Shyti <andi.shyti at linux.intel.com> # v1
> Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty at intel.com> # v2

Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty at intel.com>

Thanks,
Aravind.
> ---
>  drivers/gpu/drm/i915/i915_drm_client.c | 64 ++++++++++++++++++++++++++
>  1 file changed, 64 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c
> index a61356012df8..7efffdaa508d 100644
> --- a/drivers/gpu/drm/i915/i915_drm_client.c
> +++ b/drivers/gpu/drm/i915/i915_drm_client.c
> @@ -45,6 +45,68 @@ void __i915_drm_client_free(struct kref *kref)
>  }
>  
>  #ifdef CONFIG_PROC_FS
> +static void
> +obj_meminfo(struct drm_i915_gem_object *obj,
> +	    struct drm_memory_stats stats[INTEL_REGION_UNKNOWN])
> +{
> +	const enum intel_region_id id = obj->mm.region ?
> +					obj->mm.region->id : INTEL_REGION_SMEM;
> +	const u64 sz = obj->base.size;
> +
> +	if (obj->base.handle_count > 1)
> +		stats[id].shared += sz;
> +	else
> +		stats[id].private += sz;
> +
> +	if (i915_gem_object_has_pages(obj)) {
> +		stats[id].resident += sz;
> +
> +		if (!dma_resv_test_signaled(obj->base.resv,
> +					    DMA_RESV_USAGE_BOOKKEEP))
> +			stats[id].active += sz;
> +		else if (i915_gem_object_is_shrinkable(obj) &&
> +			 obj->mm.madv == I915_MADV_DONTNEED)
> +			stats[id].purgeable += sz;
> +	}
> +}
> +
> +static void show_meminfo(struct drm_printer *p, struct drm_file *file)
> +{
> +	struct drm_memory_stats stats[INTEL_REGION_UNKNOWN] = {};
> +	struct drm_i915_file_private *fpriv = file->driver_priv;
> +	struct i915_drm_client *client = fpriv->client;
> +	struct drm_i915_private *i915 = fpriv->i915;
> +	struct drm_i915_gem_object *obj;
> +	struct intel_memory_region *mr;
> +	struct list_head *pos;
> +	unsigned int id;
> +
> +	/* Public objects. */
> +	spin_lock(&file->table_lock);
> +	idr_for_each_entry(&file->object_idr, obj, id)
> +		obj_meminfo(obj, stats);
> +	spin_unlock(&file->table_lock);
> +
> +	/* Internal objects. */
> +	rcu_read_lock();
> +	list_for_each_rcu(pos, &client->objects_list) {
> +		obj = i915_gem_object_get_rcu(list_entry(pos, typeof(*obj),
> +							 client_link));
> +		if (!obj)
> +			continue;
> +		obj_meminfo(obj, stats);
> +		i915_gem_object_put(obj);
> +	}
> +	rcu_read_unlock();
> +
> +	for_each_memory_region(mr, i915, id)
> +		drm_print_memory_stats(p,
> +				       &stats[id],
> +				       DRM_GEM_OBJECT_RESIDENT |
> +				       DRM_GEM_OBJECT_PURGEABLE,
> +				       mr->uabi_name);
> +}
> +
>  static const char * const uabi_class_names[] = {
>  	[I915_ENGINE_CLASS_RENDER] = "render",
>  	[I915_ENGINE_CLASS_COPY] = "copy",
> @@ -106,6 +168,8 @@ void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file)
>  	 * ******************************************************************
>  	 */
>  
> +	show_meminfo(p, file);
> +
>  	if (GRAPHICS_VER(i915) < 8)
>  		return;
>