[Intel-gfx] [PATCH i-g-t] tests/gem_render_linear_blits: split into two subtests

[Chris Wilson]

On Tue, Feb 17, 2015 at 11:40:17AM +0000, tim.gore at intel.com wrote:
> From: Tim Gore <tim.gore at intel.com>
> 
> The gem_render_linear_blits test tends to get oom killed
> on low memory (< 4GB) Android systems. This is because the
> test tries to allocate (sysinfo.totalram * 9 / 10) in
> buffer objects and the remaining 10% of memory is not
> always enough for the Android system.
> After a discussion with Chris Wilson I have split this
> test into a "basic" and an "apperture-thrash" subtest,
> in the same way as gem_linear_blits. The basic test
> uses just two buffer objects and the apperture-thrash
> test is skipped if there is insuffiecient memory.
> 
> Signed-off-by: Tim Gore <tim.gore at intel.com>
> ---
>  tests/gem_render_linear_blits.c | 55 ++++++++++++++++++++++-------------------
>  1 file changed, 30 insertions(+), 25 deletions(-)
> 
> diff --git a/tests/gem_render_linear_blits.c b/tests/gem_render_linear_blits.c
> index 60ba831..3a548d3 100644
> --- a/tests/gem_render_linear_blits.c
> +++ b/tests/gem_render_linear_blits.c
> @@ -80,18 +80,14 @@ check_bo(int fd, uint32_t handle, uint32_t val)
>  	}
>  }
>  
> -int main(int argc, char **argv)
> +static void run_test (int fd, int count)
>  {
>  	drm_intel_bufmgr *bufmgr;
>  	struct intel_batchbuffer *batch;
>  	uint32_t *start_val;
>  	drm_intel_bo **bo;
>  	uint32_t start = 0;
> -	int i, j, fd, count;
> -
> -	igt_simple_init(argc, argv);
> -
> -	fd = drm_open_any();
> +	int i, j;
>  
>  	render_copy = igt_get_render_copyfunc(intel_get_drm_devid(fd));
>  	igt_require(render_copy);
> @@ -99,24 +95,6 @@ int main(int argc, char **argv)
>  	bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
>  	batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd));
>  
> -	count = 0;
> -	if (igt_run_in_simulation())
> -		count = 2;
> -	if (argc > 1)
> -		count = atoi(argv[1]);
> -
> -	if (count == 0)
> -		count = 3 * gem_aperture_size(fd) / SIZE / 2;
> -	else if (count < 2) {
> -		igt_warn("count must be >= 2\n");
> -		return 1;
> -	}
> -
> -	if (count > intel_get_total_ram_mb() * 9 / 10) {
> -		count = intel_get_total_ram_mb() * 9 / 10;
> -		igt_info("not enough RAM to run test, reducing buffer count\n");
> -	}
> -
>  	bo = malloc(sizeof(*bo)*count);
>  	start_val = malloc(sizeof(*start_val)*count);
>  
> @@ -153,7 +131,7 @@ int main(int argc, char **argv)
>  		check_bo(fd, bo[i]->handle, start_val[i]);
>  
>  	if (igt_run_in_simulation())
> -		return 0;
> +		return;
>  
>  	igt_info("Cyclic blits, backward...\n");
>  	for (i = 0; i < count * 4; i++) {
> @@ -200,5 +178,32 @@ int main(int argc, char **argv)
>  	for (i = 0; i < count; i++)
>  		check_bo(fd, bo[i]->handle, start_val[i]);
>  
> +	intel_batchbuffer_free(batch);
> +	drm_intel_bufmgr_destroy(bufmgr);
> +}
> +
> +int main(int argc, char **argv)
> +{
> +	static int fd = 0;

static!

> +	int count=0;
> +
> +	igt_subtest_init(argc, argv);
> +	igt_fixture {
> +		fd = drm_open_any();
> +	}
> +
> +	igt_subtest("basic") {
> +		run_test(fd, 2);
> +	}
> +
> +	igt_subtest("apperture-thrash") {
> +		if (argc > 1)
> +			count = atoi(argv[1]);

With automated testing we want to perform the same test over and over
again. If it is called aperture-thrash, let's make sure we do!

If anyone ever wants to manually run this with varying amounts of
objects: first they should consider enhancing the test to capture the
scenario of concern, then secondly add the manual option.

> +		if (count == 0)
> +			count = 3 * gem_aperture_size(fd) / SIZE / 2;
> +		igt_require(count > 1);
> +		intel_require_memory(count, SIZE, CHECK_RAM);
> +		run_test(fd, count);
> +	}
>  	igt_exit();
>  }
> -- 
> 2.3.0
> 

-- 
Chris Wilson, Intel Open Source Technology Centre