[igt-dev] [PATCH i-g-t 2/3] lib/igt_drm_clients: Store memory info in the client

[Kamil Konieczny]

Hi Tvrtko,

On 2023-07-27 at 10:20:24 +0100, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> Define the storage structure and copy over memory data as parsed by the
> fdinfo helpers.
> 
> v2:
>  * Fix empty region map entry skip condition. (Kamil, Chris)
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Rob Clark <robdclark at chromium.org>
> Cc: Chris Healy <cphealy at gmail.com>
> Cc: Kamil Konieczny <kamil.konieczny at linux.intel.com>
> ---
>  lib/igt_drm_clients.c | 32 ++++++++++++++++++++++++++++++++
>  lib/igt_drm_clients.h | 11 +++++++++++
>  2 files changed, 43 insertions(+)
> 
> diff --git a/lib/igt_drm_clients.c b/lib/igt_drm_clients.c
> index fdea42752a81..47ad137d5f1f 100644
> --- a/lib/igt_drm_clients.c
> +++ b/lib/igt_drm_clients.c
> @@ -103,6 +103,8 @@ igt_drm_client_update(struct igt_drm_client *c, unsigned int pid, char *name,
>  			c->clients->max_name_len = len;
>  	}
>  
> +	/* Engines */
> +
>  	c->last_runtime = 0;
>  	c->total_runtime = 0;
>  
> @@ -118,6 +120,13 @@ igt_drm_client_update(struct igt_drm_client *c, unsigned int pid, char *name,
>  		c->last[i] = info->busy[i];
>  	}
>  
> +	/* Memory regions */
> +	for (i = 0; i <= c->regions->max_region_id; i++) {
> +		assert(i < ARRAY_SIZE(info->region_mem));
> +
> +		c->memory[i] = info->region_mem[i];
> +	}
> +
>  	c->samples++;
>  	c->status = IGT_DRM_CLIENT_ALIVE;
>  }
> @@ -154,6 +163,8 @@ igt_drm_client_add(struct igt_drm_clients *clients,
>  	c->id = info->id;
>  	c->drm_minor = drm_minor;
>  	c->clients = clients;
> +
> +	/* Engines */
>  	c->engines = malloc(sizeof(*c->engines));
>  	assert(c->engines);
>  	memset(c->engines, 0, sizeof(*c->engines));
> @@ -178,6 +189,27 @@ igt_drm_client_add(struct igt_drm_clients *clients,
>  	c->last = calloc(c->engines->max_engine_id + 1, sizeof(c->last));
>  	assert(c->val && c->last);
>  
> +	/* Memory regions */
> +	c->regions = malloc(sizeof(*c->regions));
> +	assert(c->regions);
> +	memset(c->regions, 0, sizeof(*c->regions));
> +	c->regions->names = calloc(info->last_region_index + 1,
> +				   sizeof(*c->regions->names));
> +	assert(c->regions->names);
> +
> +	for (i = 0; i <= info->last_region_index; i++) {
> +		/* Region map is allowed to be sparse. */
> +		if (!info->region_names[i][0])
> +			continue;
> +
> +		c->regions->names[i] = strdup(info->region_names[i]);
--------------------------------- ^
Should this be c->regions->num_regions?

Regards,
Kamil

> +		assert(c->regions->names[i]);
> +		c->regions->num_regions++;
> +		c->regions->max_region_id = i;
> +	}
> +	c->memory = calloc(c->regions->max_region_id + 1, sizeof(*c->memory));
> +	assert(c->memory);
> +
>  	igt_drm_client_update(c, pid, name, info);
>  }
>  
> diff --git a/lib/igt_drm_clients.h b/lib/igt_drm_clients.h
> index ed795c193986..07bd236d43bf 100644
> --- a/lib/igt_drm_clients.h
> +++ b/lib/igt_drm_clients.h
> @@ -8,6 +8,8 @@
>  
>  #include <stdint.h>
>  
> +#include "lib/igt_drm_fdinfo.h"
> +
>  /**
>   * SECTION:igt_drm_clients
>   * @short_description: Parsing driver exposed fdinfo to track DRM clients
> @@ -39,12 +41,20 @@ struct igt_drm_client_engines {
>  	char **names; /* Array of engine names, either auto-detected or from the passed in engine map. */
>  };
>  
> +struct igt_drm_client_regions {
> +	unsigned int num_regions; /* Number of discovered memory_regions. */
> +	unsigned int max_region_id; /* Largest memory region index discovered.
> +				       (Can differ from num_regions - 1 when using the region map facility.) */
> +	char **names; /* Array of region names, either auto-detected or from the passed in region map. */
> +};
> +
>  struct igt_drm_clients;
>  
>  struct igt_drm_client {
>  	struct igt_drm_clients *clients; /* Owning list. */
>  
>  	enum igt_drm_client_status status;
> +	struct igt_drm_client_regions *regions; /* Memory regions present in this client, to map with memory usage. */
>  	struct igt_drm_client_engines *engines; /* Engines used by this client, to map with busynees data. */
>  	unsigned int id; /* DRM client id from fdinfo. */
>  	unsigned int drm_minor; /* DRM minor of this client. */
> @@ -57,6 +67,7 @@ struct igt_drm_client {
>  	unsigned long last_runtime; /* Aggregate busyness on all engines since previous scan. */
>  	unsigned long *val; /* Array of engine busyness data, relative to previous scan. */
>  	uint64_t *last; /* Array of engine busyness data as parsed from fdinfo. */
> +	struct drm_client_meminfo *memory; /* Array of region memory utilisation as parsed from fdinfo. */
>  };
>  
>  struct igt_drm_clients {
> -- 
> 2.39.2
>