[Intel-gfx] [PATCH i-g-t] tests/gem_cpu_reloc: Fix gem_cpu_reloc OOM failure

[Gore, Tim]

> -----Original Message-----
> From: Morton, Derek J
> Sent: Tuesday, May 12, 2015 1:10 PM
> To: intel-gfx at lists.freedesktop.org
> Cc: Wood, Thomas; Gore, Tim; Morton, Derek J
> Subject: [PATCH i-g-t] tests/gem_cpu_reloc: Fix gem_cpu_reloc OOM failure
> 
> On android with small memory footprints gem_cpu_reloc can fail due to
> OOM.
> 
> Refactor gem_cpu_reloc into 2 tests, a basic test which performs
> 10 relocations and a full test which skips if there is insufficient memory.
> 
> Changed the memory required test to better estimate the actual RAM used.
> 
> Signed-off-by: Derek Morton <derek.j.morton at intel.com>
> ---
>  tests/gem_cpu_reloc.c | 48 ++++++++++++++++++++++++++++++++++++-
> -----------
>  1 file changed, 36 insertions(+), 12 deletions(-)
> 
> diff --git a/tests/gem_cpu_reloc.c b/tests/gem_cpu_reloc.c index
> 058089c..2f5fc60 100644
> --- a/tests/gem_cpu_reloc.c
> +++ b/tests/gem_cpu_reloc.c
> @@ -159,16 +159,14 @@ uint32_t gen8_batch[] = {  uint32_t *batch =
> gen6_batch;  uint32_t batch_size = sizeof(gen6_batch);
> 
> -igt_simple_main
> +void run_test(int fd, int count)
>  {
>  	const uint32_t hang[] = {-1, -1, -1, -1};
>  	const uint32_t end[] = {MI_BATCH_BUFFER_END, 0};
> -	uint64_t aper_size;
>  	uint32_t noop;
>  	uint32_t *handles;
> -	int fd, i, count;
> +	int i;
> 
> -	fd = drm_open_any();
>  	noop = intel_get_drm_devid(fd);
> 
>  	use_blt = 0;
> @@ -180,13 +178,6 @@ igt_simple_main
>  		batch_size += 2 * 4;
>  	}
> 
> -	aper_size = gem_mappable_aperture_size();
> -	count = aper_size / 4096 * 2;
> -	if (igt_run_in_simulation())
> -		count = 10;
> -
> -	intel_require_memory(1+count, 4096, CHECK_RAM);
> -
>  	handles = malloc (count * sizeof(uint32_t));
>  	igt_assert(handles);
> 
> @@ -246,6 +237,39 @@ igt_simple_main
>  		igt_progress("gem_cpu_reloc: ", 2*count+i, 3*count);
>  	}
> 
> -	igt_info("Test suceeded, cleanup up - this might take a while.\n");
> +	igt_info("Subtest suceeded, cleanup up - this might take a while.\n");
> +	for (i = 0; i < count; i++) {
> +		gem_close(fd, handles[i]);
> +	}
> +	gem_close(fd, noop);
> +	free(handles);
> +}
> +
> +igt_main
> +{
> +	uint64_t aper_size;
> +	int fd, count;
> +
> +	igt_fixture {
> +		fd = drm_open_any();
> +	}
> +
> +	igt_subtest("basic") {
> +		run_test (fd, 10);
> +	}
> +
> +	igt_skip_on_simulation();
> +
> +	igt_subtest("full") {
> +		aper_size = gem_mappable_aperture_size();
> +		count = aper_size / 4096 * 2;
> +
> +		/* count + 2 (noop & bad) buffers. A gem object appears to
> +                   require about 2kb + buffer + kernel overhead */
> +		intel_require_memory(2+count, 2048+4096, CHECK_RAM);
> +
> +		run_test (fd, count);
> +	}
> +
>  	close(fd);
>  }
> --
> 1.9.1

Works for me. This follows the pattern we have been using for other tests
that cannot run on low memory systems.

Reviewed-by: Tim Gore <tim.gore at intel.com>