Re: [igt-dev] [PATCH i-g-t 2/2] tests/xe/xe_spin_batch: Add new test to exercise igt_spin_new for xe.

["Zbigniew Kempczyński" <zbigniew.kempczynski@intel.com>]

On Tue, May 30, 2023 at 03:38:05PM +0530, sai.gowtham.ch@intel.com wrote:
> From: Sai Gowtham Ch <sai.gowtham.ch@intel.com>
> 
> xe_spin_batch test exercises igt_spin_new submissions with different
> combinations.
> 
> Cc: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>
> Signed-off-by: Sai Gowtham Ch <sai.gowtham.ch@intel.com>
> ---
>  tests/meson.build        |   1 +
>  tests/xe/xe_spin_batch.c | 168 +++++++++++++++++++++++++++++++++++++++
>  2 files changed, 169 insertions(+)
>  create mode 100644 tests/xe/xe_spin_batch.c
> 
> diff --git a/tests/meson.build b/tests/meson.build
> index f71be1db..e794b75a 100644
> --- a/tests/meson.build
> +++ b/tests/meson.build
> @@ -268,6 +268,7 @@ xe_progs = [
>  	'xe_query',
>  	'xe_vm',
>  	'xe_waitfence',
> +	'xe_spin_batch',
>  ]
>  
>  msm_progs = [
> diff --git a/tests/xe/xe_spin_batch.c b/tests/xe/xe_spin_batch.c
> new file mode 100644
> index 00000000..55207eff
> --- /dev/null
> +++ b/tests/xe/xe_spin_batch.c
> @@ -0,0 +1,168 @@
> +#include "igt.h"
> +#include "lib/intel_reg.h"
> +#include "xe_drm.h"
> +#include "xe/xe_ioctl.h"
> +#include "xe/xe_query.h"
> +
> +#define MAX_INSTANCE 9
> +
> +/**
> + * TEST: Basic test for spin batch submissons.
> + *
> + * SUBTEST: spin-basic
> + * Description: Basic test to submit spin batch submissons.

Add information to which engine it will submit the spinner.

> + * Run type: FULL
> + * TODO: change ``'Run type' == FULL`` to a better category
> + *
> + */
> +
> +static void spin_basic(int fd)
> +{
> +	uint64_t ahnd;
> +	igt_spin_t *spin;
> +
> +	ahnd = intel_allocator_open(fd, 0, INTEL_ALLOCATOR_RELOC);
> +	spin = __igt_spin_new(fd, .ahnd = ahnd);

Why not just igt_spin_new()?

> +	igt_assert(spin);
> +
> +	igt_spin_free(fd, spin);
> +	put_ahnd(ahnd);
> +}

Rest is ok.

> +
> +/**
> + * TEST:Test for spin batch submissons.
           ^ space.
> + *
> + * SUBTEST: spin-batch
> + * Description: Test to submit spin batch with engines and vm.

Maybe: Create vm and engine of hwe class and run the spinner on it.

> + * Run type: FULL
> + * TODO: change ``'Run type' == FULL`` to a better category
> + *
> + */
> +
> +static void spin(int fd, struct drm_xe_engine_class_instance *hwe)
> +{
> +	uint64_t ahnd;
> +	unsigned int engine;
> +	uint32_t vm;
> +	igt_spin_t *spin;
> +
> +	vm = xe_vm_create(fd, 0, 0);
> +	engine = xe_engine_create(fd, vm, hwe, 0);
> +	ahnd = intel_allocator_open(fd, 0, INTEL_ALLOCATOR_RELOC);
> +
> +	spin = __igt_spin_new(fd, .ahnd = ahnd, .engine = engine, .vm = vm);
> +	igt_assert(spin);
> +
> +	igt_spin_free(fd, spin);
> +	xe_engine_destroy(fd, engine);
> +	xe_vm_destroy(fd, vm);
> +
> +	put_ahnd(ahnd);
> +}

Test itself looks good.

> +
> +/**
> + * TEST: Basic test for spin batch submission on all hwe.
> + *
> + * SUBTEST: spin-basic-all
> + * Description: Basic test which validates the functionality of spinner on all hwe.
> + * Run type: FULL
> + * TODO: change ``'Run type' == FULL`` to a better category
> + *
> + */
> +static void spin_basic_all(int fd, struct drm_xe_engine_class_instance *hwe)
                                      ^ ---- if for all what hwe is for here?
> +{
> +	uint64_t ahnd;
> +	igt_spin_t *spin;
> +
> +	ahnd = intel_allocator_open(fd, 0, INTEL_ALLOCATOR_RELOC);
> +	spin = __igt_spin_new(fd, .ahnd = ahnd, .hwe = hwe);

I would expect:

spin = igt_spin_new(fd, .ahnd = ahnd, .engine = ALL_ENGINES);

> +	igt_assert(spin);
> +
> +	igt_spin_free(fd, spin);
> +	put_ahnd(ahnd);
> +}
> +
> +/**
> + * TEST: Test for spin batch submissions.
> + * SUBTEST: spin-all
> + * Description: Spinner test to run on all the engines!
                                                         ^ what ! is for?
> + * Run type: FULL
> + * TODO: change ``'Run type' == FULL`` to a better category
> + *
> + */
> +
> +static void spin_all (int fd, int gt, int class)
                       ^ unnecessary space
> +{
> +	uint64_t ahnd;
> +	uint32_t engines[MAX_INSTANCE];
> +	uint32_t vm[MAX_INSTANCE];

You may use single vm here. Let's see how spinners will share
same address space.

> +	int i, num_placements = 0;
> +	struct drm_xe_engine_class_instance eci[MAX_INSTANCE];
> +	igt_spin_t *spin[MAX_INSTANCE];
> +	struct drm_xe_engine_class_instance *hwe;
> +
> +	ahnd = intel_allocator_open(fd, 0, INTEL_ALLOCATOR_RELOC);
> +
> +	xe_for_each_hw_engine(fd, hwe) {
> +		if (hwe->engine_class != class || hwe->gt_id != gt)
> +			continue;
> +		eci[num_placements++] = *hwe;
> +	}

What's your intention here? To run spinners on dedicated gt
and some class?

--
Zbigniew

 
> +	if (num_placements < 2)
> +		return;
> +
> +	for (i = 0; i < num_placements; i++) {
> +		struct drm_xe_engine_create create;
> +		vm[i] = xe_vm_create(fd, 0, 0);
> +
> +		create.vm_id = vm[i];
> +		create.width = 1;
> +		create.num_placements = num_placements;
> +		create.instances = to_user_pointer(eci);
> +
> +		igt_assert_eq(igt_ioctl(fd, DRM_IOCTL_XE_ENGINE_CREATE,
> +					&create), 0);
> +		engines[i] = create.engine_id;
> +		spin[i] = __igt_spin_new(fd, .ahnd = ahnd, .engine = engines[i], .vm = vm[i]);
> +	}
> +
> +	for (i = 0; i < num_placements; i++) {
> +		igt_assert(spin[i]);
> +		igt_spin_free(fd, spin[i]);
> +	}
> +	put_ahnd(ahnd);
> +}
> +
> +igt_main
> +{
> +	struct drm_xe_engine_class_instance *hwe;
> +	int fd;
> +	int gt, class;
> +
> +	igt_fixture {
> +		fd = drm_open_driver(DRIVER_XE);
> +		xe_device_get(fd);
> +	}
> +
> +	igt_subtest("spin-basic")
> +		spin_basic(fd);
> +
> +	igt_subtest("spin-batch")
> +		xe_for_each_hw_engine(fd, hwe)
> +			spin(fd, hwe);
> +
> +	igt_subtest("spin-basic-all")
> +		xe_for_each_hw_engine(fd, hwe)
> +			spin_basic_all(fd, hwe);
> +
> +	igt_subtest("spin-all") {
> +		xe_for_each_gt(fd, gt)
> +			xe_for_each_hw_engine_class(class)
> +				spin_all(fd, gt, class);
> +	}
> +
> +	igt_fixture {
> +		xe_device_put(fd);
> +		close(fd);
> +	}
> +}
> -- 
> 2.39.1
>