[igt-dev] [PATCH i-g-t] xe_create: create-big-vram subtest
Matthew Auld
matthew.william.auld at gmail.com
Tue Nov 21 15:42:58 UTC 2023
On Tue, 21 Nov 2023 at 13:50, Marcin Bernatowicz
<marcin.bernatowicz at intel.com> wrote:
>
> Validates the creation of significant Buffer Objects (BO) within VRAM,
> accounting for 75% of the 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)
>
> Signed-off-by: Marcin Bernatowicz <marcin.bernatowicz at intel.com>
> ---
> tests/intel/xe_create.c | 80 ++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 79 insertions(+), 1 deletion(-)
>
> diff --git a/tests/intel/xe_create.c b/tests/intel/xe_create.c
> index f4633cfb3..3ff9bb750 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 = 75,
> +};
> +
> static int __create_bo(int fd, uint32_t vm, uint64_t size, uint32_t flags,
> uint32_t *handlep)
> {
> @@ -214,7 +222,73 @@ static void create_massive_size(int fd)
> }
> }
>
> -igt_main
> +/**
> + * SUBTEST: create-big-vram
> + * Functionality: BO creation
> + * Test category: functionality test
> + * Description: Validates the creation of substantial BO within VRAM
> + * (constituting 75% of the CPU-visible VRAM).
> + */
> +static void create_big_vram(int fd)
> +{
> + uint64_t bo_size, size, vram_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) {
> + vram_size = xe_visible_vram_size(fd, gt);
> + bo_size = params.size_MB ? params.size_MB * 1024ULL * 1024ULL
> + : ALIGN(vram_size * params.vram_percent / 100, alignment);
> + igt_debug("gt%u bo_size=%lu visible_vram_size=%lu\n", gt, bo_size, vram_size);
> +
> + igt_assert_eq(0, __create_bo(fd, vm, bo_size, vram_memory(fd, gt), &bo_handle));
We should also ask the KMD to allocate the memory within the CPU
visible portion of VRAM (if applicable), otherwise we will likely
trigger SIGBUS below on small-bar systems. See visible_vram_memory().
> + 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 (default 75% of visible VRAM size)\n"
> + ;
> +
> +igt_main_args("S:p:", NULL, help_str, opt_handler, NULL)
> {
> int xe;
>
> @@ -254,6 +328,10 @@ igt_main
> }
>
>
> + igt_subtest("create-big-vram") {
> + create_big_vram(xe);
> + }
> +
> igt_fixture
> drm_close_driver(xe);
> }
> --
> 2.31.1
>
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