[Piglit] [PATCH] arb_shader_clock: add basic execution tests

[Ilia Mirkin]

Time could roll over... not sure what to do about that though. Maybe
check if the top 2 bits are set in the old value and are unset in the
new value, and hope that the counter precision > 2 bits? [It'd be
unfortunate for CIs to get occasional failures in these tests...]

On Thu, Mar 30, 2017 at 3:23 AM, Nicolai Hähnle <nhaehnle at gmail.com> wrote:
> From: Nicolai Hähnle <nicolai.haehnle at amd.com>
>
> ---
>  .../arb_shader_clock/execution/clock.shader_test   | 54 +++++++++++++++++++
>  .../execution/clock2x32.shader_test                | 63 ++++++++++++++++++++++
>  2 files changed, 117 insertions(+)
>  create mode 100644 tests/spec/arb_shader_clock/execution/clock.shader_test
>  create mode 100644 tests/spec/arb_shader_clock/execution/clock2x32.shader_test
>
> diff --git a/tests/spec/arb_shader_clock/execution/clock.shader_test b/tests/spec/arb_shader_clock/execution/clock.shader_test
> new file mode 100644
> index 0000000..07530e6
> --- /dev/null
> +++ b/tests/spec/arb_shader_clock/execution/clock.shader_test
> @@ -0,0 +1,54 @@
> +[require]
> +GL >= 4.3
> +GLSL >= 4.30
> +GL_ARB_gpu_shader_int64
> +GL_ARB_shader_clock
> +
> +[compute shader]
> +#version 430
> +#extension GL_ARB_gpu_shader_int64: require
> +#extension GL_ARB_shader_clock: require
> +
> +layout(local_size_x = 1) in;
> +
> +layout(binding = 0) uniform atomic_uint good;
> +layout(binding = 1) uniform atomic_uint bad;
> +
> +layout(std430, binding = 0) buffer ssbo_data {
> +       uint64_t ssbo_time[];
> +};
> +
> +uniform uint phase;
> +
> +void main() {
> +       uint64_t start_time = clockARB();
> +
> +       if (phase == 0u) {
> +               ssbo_time[gl_WorkGroupID.x] = start_time;
> +       } else {
> +               int64_t diff = int64_t(start_time - ssbo_time[gl_WorkGroupID.x]);
> +               if (diff > 0l)
> +                       atomicCounterIncrement(good);
> +       }
> +
> +       uint64_t late_time = clockARB();
> +       int64_t diff = int64_t(late_time - start_time);
> +
> +       if (diff <= 0l)
> +               atomicCounterIncrement(bad);
> +}
> +
> +[test]
> +atomic counters 2
> +ssbo 0 64
> +
> +uniform uint phase 0
> +compute 8 1 1
> +
> +memory barrier GL_SHADER_STORAGE_BARRIER_BIT
> +
> +uniform uint phase 1
> +compute 8 1 1
> +
> +probe atomic counter 0 == 8
> +probe atomic counter 1 == 0
> diff --git a/tests/spec/arb_shader_clock/execution/clock2x32.shader_test b/tests/spec/arb_shader_clock/execution/clock2x32.shader_test
> new file mode 100644
> index 0000000..1a2bfef
> --- /dev/null
> +++ b/tests/spec/arb_shader_clock/execution/clock2x32.shader_test
> @@ -0,0 +1,63 @@
> +[require]
> +GL >= 4.3
> +GLSL >= 4.30
> +GL_ARB_shader_clock
> +
> +[compute shader]
> +#version 430
> +#extension GL_ARB_shader_clock: require
> +
> +layout(local_size_x = 1) in;
> +
> +layout(binding = 0) uniform atomic_uint good;
> +layout(binding = 1) uniform atomic_uint bad;
> +
> +layout(std430, binding = 0) buffer ssbo_data {
> +       uvec2 ssbo_time[];
> +};
> +
> +uniform uint phase;
> +
> +bool is_time_ordered(uvec2 a, uvec2 b) {
> +       int diff = int(b.y - a.y);
> +       if (diff > 0)
> +               return true;
> +       if (diff < 0)
> +               return false;
> +
> +       diff = int(b.x - a.x);
> +       if (diff > 0)
> +               return true;
> +       return false;
> +}
> +
> +void main() {
> +       uvec2 start_time = clock2x32ARB();
> +
> +       if (phase == 0u) {
> +               ssbo_time[gl_WorkGroupID.x] = start_time;
> +       } else {
> +               if (is_time_ordered(ssbo_time[gl_WorkGroupID.x], start_time))
> +                       atomicCounterIncrement(good);
> +       }
> +
> +       uvec2 late_time = clock2x32ARB();
> +
> +       if (!is_time_ordered(start_time, late_time))
> +               atomicCounterIncrement(bad);
> +}
> +
> +[test]
> +atomic counters 2
> +ssbo 0 64
> +
> +uniform uint phase 0
> +compute 8 1 1
> +
> +memory barrier GL_SHADER_STORAGE_BARRIER_BIT
> +
> +uniform uint phase 1
> +compute 8 1 1
> +
> +probe atomic counter 0 == 8
> +probe atomic counter 1 == 0
> --
> 2.9.3
>
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