[PATCH 5/5] drm/i915: Implement fdinfo memory stats printing

[Tvrtko Ursulin]

On 22/09/2023 09:48, Iddamsetty, Aravind wrote:
> 
> 
> On 21-09-2023 17:18, 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.
>>
>> Objects with multiple possible placements are reported in multiple
>> regions for total and shared sizes, while other categories are
> 
> I guess you forgot to correct this.

Ah yes, will fix.

> 
>> counted only for the currently active region.
>>
>> v2:
>>   * Only account against the active region.
>>   * Use DMA_RESV_USAGE_BOOKKEEP when testing for active. (Tejas)
>>
>> 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
>> ---
>>   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..94abc2fb2ea6 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->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;
>>   
> 
> Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty at intel.com>

Thank you! Would you be able to also look at the IGTs I posted yesterday?

Regards,

Tvrtko