Re: [PATCH] xe/xe_bo_move: Enhance xe_bo_move trace

["Thomas Hellström" <thomas.hellstrom@linux.intel.com>]

Hi, Priyanka,

On Wed, 2024-01-03 at 18:08 +0530, priyanka.dandamudi@intel.com wrote:
> From: Priyanka Dandamudi <priyanka.dandamudi@intel.com>
> 
> Enhanced xe_bo_move trace to be more readable.
> It will help to show the migration details.
> Src and dst details.
> 
> v2: Modify trace_xe_bo_move(), it takes the integer mem_type
> rather than a string.
> Make mem_type_to_name() extern, it will be used by trace.(Thomas)
> 
> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
> Cc: Oak Zeng <oak.zeng@intel.com>
> Cc: Kempczynski Zbigniew <Zbigniew.Kempczynski@intel.com>
> Cc: Matthew Brost <matthew.brost@intel.com>
> Cc: Brian Welty <brian.welty@intel.com>
> Signed-off-by: Priyanka Dandamudi <priyanka.dandamudi@intel.com>
> ---
>  drivers/gpu/drm/xe/xe_bo.c         |  3 +--
>  drivers/gpu/drm/xe/xe_drm_client.c | 16 ++++++++--------
>  drivers/gpu/drm/xe/xe_drm_client.h |  2 ++
>  drivers/gpu/drm/xe/xe_trace.h      | 24 +++++++++++++++++++++---
>  4 files changed, 32 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
> index 8e4a3b1f6b93..f7075fd86547 100644
> --- a/drivers/gpu/drm/xe/xe_bo.c
> +++ b/drivers/gpu/drm/xe/xe_bo.c
> @@ -713,8 +713,7 @@ static int xe_bo_move(struct ttm_buffer_object
> *ttm_bo, bool evict,
>  		migrate = xe->tiles[0].migrate;
>  
>  	xe_assert(xe, migrate);
> -
> -	trace_xe_bo_move(bo);
> +	trace_xe_bo_move(bo, new_mem->mem_type, old_mem_type);
>  	xe_device_mem_access_get(xe);
>  
>  	if (xe_bo_is_pinned(bo) && !xe_bo_is_user(bo)) {
> diff --git a/drivers/gpu/drm/xe/xe_drm_client.c
> b/drivers/gpu/drm/xe/xe_drm_client.c
> index 82d1305e831f..e845b7f22e38 100644
> --- a/drivers/gpu/drm/xe/xe_drm_client.c
> +++ b/drivers/gpu/drm/xe/xe_drm_client.c
> @@ -15,6 +15,14 @@
>  #include "xe_drm_client.h"
>  #include "xe_trace.h"
>  
> +const char *const mem_type_to_name[TTM_NUM_MEM_TYPES]  = {
> +	[XE_PL_SYSTEM] = "system",
> +	[XE_PL_TT] = "gtt",
> +	[XE_PL_VRAM0] = "vram0",
> +	[XE_PL_VRAM1] = "vram1",
> +	[XE_PL_STOLEN] = "stolen"
> +};
> +

Please use xe_bo.[ch] for this, since it is related to the buffer
object placements, and the Xe placements are defined in xe_bo.h

/Thomas


>  /**
>   * xe_drm_client_alloc() - Allocate drm client
>   * @void: No arg
> @@ -131,14 +139,6 @@ static void bo_meminfo(struct xe_bo *bo,
>  
>  static void show_meminfo(struct drm_printer *p, struct drm_file
> *file)
>  {
> -	static const char *const
> mem_type_to_name[TTM_NUM_MEM_TYPES]  = {
> -		[XE_PL_SYSTEM] = "system",
> -		[XE_PL_TT] = "gtt",
> -		[XE_PL_VRAM0] = "vram0",
> -		[XE_PL_VRAM1] = "vram1",
> -		[4 ... 6] = NULL,
> -		[XE_PL_STOLEN] = "stolen"
> -	};
>  	struct drm_memory_stats stats[TTM_NUM_MEM_TYPES] = {};
>  	struct xe_file *xef = file->driver_priv;
>  	struct ttm_device *bdev = &xef->xe->ttm;
> diff --git a/drivers/gpu/drm/xe/xe_drm_client.h
> b/drivers/gpu/drm/xe/xe_drm_client.h
> index a9649aa36011..4e33d0981b6a 100644
> --- a/drivers/gpu/drm/xe/xe_drm_client.h
> +++ b/drivers/gpu/drm/xe/xe_drm_client.h
> @@ -13,6 +13,8 @@
>  #include <linux/sched.h>
>  #include <linux/spinlock.h>
>  
> +extern const char *const mem_type_to_name[];
> +
>  struct drm_file;
>  struct drm_printer;
>  struct xe_bo;
> diff --git a/drivers/gpu/drm/xe/xe_trace.h
> b/drivers/gpu/drm/xe/xe_trace.h
> index 95163c303f3e..196d277795a0 100644
> --- a/drivers/gpu/drm/xe/xe_trace.h
> +++ b/drivers/gpu/drm/xe/xe_trace.h
> @@ -13,6 +13,7 @@
>  #include <linux/types.h>
>  
>  #include "xe_bo_types.h"
> +#include "xe_drm_client.h"
>  #include "xe_exec_queue_types.h"
>  #include "xe_gpu_scheduler_types.h"
>  #include "xe_gt_tlb_invalidation_types.h"
> @@ -100,9 +101,26 @@ DEFINE_EVENT(xe_bo, xe_bo_cpu_fault,
>  	     TP_ARGS(bo)
>  );
>  
> -DEFINE_EVENT(xe_bo, xe_bo_move,
> -	     TP_PROTO(struct xe_bo *bo),
> -	     TP_ARGS(bo)
> +TRACE_EVENT(xe_bo_move,
> +	    TP_PROTO(struct xe_bo *bo, uint32_t new_placement,
> uint32_t old_placement),
> +	    TP_ARGS(bo, new_placement, old_placement),
> +	    TP_STRUCT__entry(
> +		     __field(struct xe_bo *, bo)
> +		     __field(size_t, size)
> +		     __field(u32, new_placement)
> +		     __field(u32, old_placement)
> +			),
> +
> +	    TP_fast_assign(
> +		   __entry->bo      = bo;
> +		   __entry->size = bo->size;
> +		   __entry->new_placement = new_placement;
> +		   __entry->old_placement = old_placement;
> +
> +		   ),
> +	    TP_printk("migrate object %p [size %zu] from %s to %s",
> +		      __entry->bo, __entry->size,
> mem_type_to_name[__entry->old_placement],
> +		      mem_type_to_name[__entry->new_placement])
>  );
>  
>  DECLARE_EVENT_CLASS(xe_exec_queue,