[igt-dev] [PATCH v4 i-g-t 2/2] tests/intel/xe_create: create-big-vram subtest

[Kamil Konieczny]

Hi Marcin,
On 2023-11-23 at 16:08:23 +0100, Marcin Bernatowicz wrote:
> Validates the creation of significant Buffer Object (BO) within VRAM,
> considering the entire available CPU-visible VRAM size.
> The size of the created BO can be adjusted using command line
> parameters, with '-S' representing BO size in MB,
> and '-p' representing BO size as a percentage of the VRAM size.
> 
> v2: rebased, updated to uAPI changes (DRM_XE_VM_CREATE_FLAG_ASYNC_DEFAULT),
>     after review corrections: 1024UL -> 1024ULL,
>     int -> unsigned int (Kamil)
> 
> v3: provided a flag to allocate the memory within the CPU-visible
>       portion of VRAM (Matt)
>     __create_bo replaced with xe_bo_create_flags (Lukasz)
>     removed the percent command line parameter (Lukasz)
>     renamed size_MB to size_mb (Lukasz)
>     added helper function to query available CPU-visible VRAM size,
>     renamed 'xe_vram_available' to 'xe_available_vram_size' for
>       consistency with other function names
> 
> v4: split lib and test changes into separate patches (Lukasz, Kamil)
>     added prefixes to titles (Kamil)
>     restored percent command line parameter (Kamil)
>     whitespace correction (Kamil)
> 
> Cc: Kamil Konieczny <kamil.konieczny at linux.intel.com>
> Cc: Laguna, Lukasz <lukasz.laguna at intel.com>
> Cc: Matthew Auld <matthew.auld at intel.com>
> Signed-off-by: Marcin Bernatowicz <marcin.bernatowicz at intel.com>
> ---
>  tests/intel/xe_create.c | 84 ++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 83 insertions(+), 1 deletion(-)
> 
> diff --git a/tests/intel/xe_create.c b/tests/intel/xe_create.c
> index f4633cfb3..194c677ee 100644
> --- a/tests/intel/xe_create.c
> +++ b/tests/intel/xe_create.c
> @@ -18,6 +18,14 @@
>  
>  #define PAGE_SIZE 0x1000
>  
> +static struct param {
> +	unsigned int size_mb;
> +	unsigned int vram_percent;
> +} params = {
> +	.size_mb = 0,
> +	.vram_percent = 0,
> +};
> +
>  static int __create_bo(int fd, uint32_t vm, uint64_t size, uint32_t flags,
>  		       uint32_t *handlep)
>  {
> @@ -214,7 +222,78 @@ static void create_massive_size(int fd)
>  	}
>  }
>  
> -igt_main
> +/**
> + * SUBTEST: create-big-vram
> + * Functionality: BO creation
> + * Test category: functionality test
> + * Description: Verifies the creation of substantial BO within VRAM,
> + *		constituting all available CPU-visible VRAM.
> + */
> +static void create_big_vram(int fd)
> +{
> +	uint64_t bo_size, size, visible_avail_size, alignment;
> +	uint32_t bo_handle;
> +	char *bo_ptr = NULL;
> +	uint64_t vm = 0;
> +	int gt;
> +
> +	igt_require(xe_has_vram(fd));
> +	alignment = xe_get_default_alignment(fd);
> +	vm = xe_vm_create(fd, DRM_XE_VM_CREATE_FLAG_ASYNC_DEFAULT, 0);
> +
> +	xe_for_each_gt(fd, gt) {
> +		visible_avail_size = xe_visible_available_vram_size(fd, gt);

Skip (continue) if == 0?

> +		bo_size = params.size_mb
> +			  ? params.size_mb * 1024ULL * 1024ULL
> +			  : params.vram_percent
> +				? ALIGN(visible_avail_size * params.vram_percent / 100, alignment)
> +				: ALIGN_DOWN(visible_avail_size, alignment);
> +		igt_info("gt%u bo_size=%lu visible_available_vram_size=%lu\n",
> +			gt, bo_size, visible_avail_size);
> +

Should it skip if calculated bo_size == 0?
In case of skips you can make it dynamic or count number
of performed tests (it should be > 0).

Regards,
Kamil

> +		bo_handle = xe_bo_create_flags(fd, vm, bo_size, visible_vram_memory(fd, gt));
> +		bo_ptr = xe_bo_map(fd, bo_handle, bo_size);
> +
> +		size = bo_size - 1;
> +		while (size > SZ_64K) {
> +			igt_assert_eq(0, READ_ONCE(bo_ptr[size]));
> +			WRITE_ONCE(bo_ptr[size], 'A');
> +			igt_assert_eq('A', READ_ONCE(bo_ptr[size]));
> +			size >>= 1;
> +		}
> +		igt_assert_eq(0, bo_ptr[0]);
> +
> +		munmap(bo_ptr, bo_size);
> +		gem_close(fd, bo_handle);
> +	}
> +
> +	xe_vm_destroy(fd, vm);
> +}
> +
> +static int opt_handler(int opt, int opt_index, void *data)
> +{
> +	switch (opt) {
> +	case 'S':
> +		params.size_mb = atoi(optarg);
> +		igt_debug("Size MB: %d\n", params.size_mb);
> +		break;
> +	case 'p':
> +		params.vram_percent = atoi(optarg);
> +		igt_debug("Percent of VRAM: %d\n", params.vram_percent);
> +		break;
> +	default:
> +		return IGT_OPT_HANDLER_ERROR;
> +	}
> +
> +	return IGT_OPT_HANDLER_SUCCESS;
> +}
> +
> +const char *help_str =
> +	"  -S\tBO size in MB\n"
> +	"  -p\tPercent of VRAM for BO\n"
> +	;
> +
> +igt_main_args("S:p:", NULL, help_str, opt_handler, NULL)
>  {
>  	int xe;
>  
> @@ -253,6 +332,9 @@ igt_main
>  		igt_waitchildren();
>  	}
>  
> +	igt_subtest("create-big-vram") {
> +		create_big_vram(xe);
> +	}
>  
>  	igt_fixture
>  		drm_close_driver(xe);
> -- 
> 2.31.1
>