Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:
> These tests are not intended to exercise runtime pm, but the device
> going to sleep in the middle of these tests can significantly slow them
> down as the GTT mmapping is torn down and must be rebuilt. This can be a
> major nuisance if the device autosuspends many times a second.
>
> These tests differ from typical applications as they are not doing any
> rendering or utilizing the display which would ordinarily keep the
> device awake.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> ---
> tests/i915/gem_fence_thrash.c | 17 +++++++++++++++++
> tests/i915/gem_mmap_gtt.c | 15 ++++++++++++++-
> 2 files changed, 31 insertions(+), 1 deletion(-)
>
> diff --git a/tests/i915/gem_fence_thrash.c b/tests/i915/gem_fence_thrash.c
> index 2d7fb2ff8..770e9cb98 100644
> --- a/tests/i915/gem_fence_thrash.c
> +++ b/tests/i915/gem_fence_thrash.c
> @@ -232,10 +232,27 @@ static int run_test(int threads_per_fence, void *f, int tiling,
> return 0;
> }
>
> +static int wakeref_open(int device)
> +{
> + int dir, fd;
> +
> + dir = igt_debugfs_dir(device);
> + fd = openat(dir, "i915_wakeref_user", O_RDONLY);
I was seeking the corresponding debugfs entry. However
it seems forcewake user takes the pm ref and you want to piggyback on
that.
also igt_assert(fd != -1) ?
-Mika
> + close(dir);
> +
> + return fd;
> +}
> +
> igt_main
> {
> igt_skip_on_simulation();
>
> + igt_fixture {
> + int fd = drm_open_driver(DRIVER_INTEL);
> + wakeref_open(fd);
> + close(fd);
> + }
> +
> igt_subtest("bo-write-verify-none")
> igt_assert(run_test(0, bo_write_verify, I915_TILING_NONE, 80) == 0);
>
> diff --git a/tests/i915/gem_mmap_gtt.c b/tests/i915/gem_mmap_gtt.c
> index 9a670f030..4b709f81e 100644
> --- a/tests/i915/gem_mmap_gtt.c
> +++ b/tests/i915/gem_mmap_gtt.c
> @@ -873,6 +873,17 @@ static int mmap_ioctl(int i915, struct drm_i915_gem_mmap_gtt *arg)
> return err;
> }
>
> +static int wakeref_open(int device)
> +{
> + int dir, fd;
> +
> + dir = igt_debugfs_dir(device);
> + fd = openat(dir, "i915_wakeref_user", O_RDONLY);
> + close(dir);
> +
> + return fd;
> +}
> +
> int fd;
>
> igt_main
> @@ -880,8 +891,10 @@ igt_main
> if (igt_run_in_simulation())
> OBJECT_SIZE = 1 * 1024 * 1024;
>
> - igt_fixture
> + igt_fixture {
> fd = drm_open_driver(DRIVER_INTEL);
> + wakeref_open(fd);
> + }
>
> igt_subtest("bad-object") {
> uint32_t real_handle = gem_create(fd, 4096);
> --
> 2.20.1
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