[Intel-gfx] [PATCH igt v2] lib: Update intel_require_memory to handle +4GB cases

[Chris Wilson]

On Wed, Jun 24, 2015 at 02:40:31PM +0100, Michel Thierry wrote:
> Changed size from u32 to u64 to support +4GB.
> 48-bit PPGTT test cases may need extra memory available.
> 
> v2: Use thousands separator (Chris)
> 
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Michel Thierry <michel.thierry at intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>

One last thing, whilst you're in this function, mind moving the
igt_skip_on_simulation() to the start?

intel_require_memory()
{
  /* We use intel_require_memory() to detect tests that are designed to
   * with large working sets to stress boundaries such as aperture, and/or
   * memory exhaustion. Functional tests that also require large working
   * sets are split into two, a small subtest to verify the operation with the
   * absolute minimum working set, and the full subtest to verify the
   * interesting corner cases. The former test doesn't require the
   * memory check and so judicious use of intel_require_memory() helps
   * segregate such functional tests from the broader tests, useful for
   * slow verification systems such as the simulator.
   *
   * To recap, lay out behaviour tests like:
   *    igt_subtest("small") {
   *       run_test({.num_surfaces = 2 });
   *    }
   *    igt_subtest("full") {
   *      intel_require_memory(NUM_SURFACES, SURFACE_SIZE, CHECK_RAM);
   *      run_test({.num_surfaces = NUM_SURFACES});
   *    }
   * so that we have a simple check that is run anywhere and everywhere,
   * useful to prove the test itself works as expected, and the full
   * slow check that needs to be run on real hardware.
   */
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre