Resolve sampler benchmark variability with setting random seed

benchmarks/samplers/benchmark_samplers.py

@@ -11,15 +11,20 @@
     clips_at_regular_timestamps,
 )
 
+DEFAULT_VIDEO_PATH = Path(__file__).parent / "../../test/resources/nasa_13013.mp4"
+DEFAULT_NUM_EXP = 30
+DEFAULT_TORCH_SEED = 0
 
-def bench(f, *args, num_exp=100, warmup=0, **kwargs):
+
+def bench(f, *args, num_exp, warmup=0, seed, **kwargs):
 
     for _ in range(warmup):
         f(*args, **kwargs)
 
     num_frames = None
     times = []
     for _ in range(num_exp):
+        torch.manual_seed(seed)
         start = perf_counter_ns()
         clips = f(*args, **kwargs)
         end = perf_counter_ns()
@@ -54,8 +59,7 @@ def sample(decoder, sampler, **kwargs):
     )
 
 
-def run_sampler_benchmarks(device, video):
-    NUM_EXP = 30
+def run_sampler_benchmarks(device, video, num_experiments, torch_seed):
 
     for num_clips in (1, 50):
         print("-" * 10)
@@ -68,8 +72,9 @@ def run_sampler_benchmarks(device, video):
             decoder,
             clips_at_random_indices,
             num_clips=num_clips,
-            num_exp=NUM_EXP,
+            num_exp=num_experiments,
             warmup=2,
+            seed=torch_seed,
         )
         report_stats(times, num_frames, unit="ms")
 
@@ -79,8 +84,9 @@ def run_sampler_benchmarks(device, video):
             decoder,
             clips_at_regular_indices,
             num_clips=num_clips,
-            num_exp=NUM_EXP,
+            num_exp=num_experiments,
             warmup=2,
+            seed=torch_seed,
         )
         report_stats(times, num_frames, unit="ms")
 
@@ -90,8 +96,9 @@ def run_sampler_benchmarks(device, video):
             decoder,
             clips_at_random_timestamps,
             num_clips=num_clips,
-            num_exp=NUM_EXP,
+            num_exp=num_experiments,
             warmup=2,
+            seed=torch_seed,
         )
         report_stats(times, num_frames, unit="ms")
 
@@ -102,19 +109,23 @@ def run_sampler_benchmarks(device, video):
             decoder,
             clips_at_regular_timestamps,
             seconds_between_clip_starts=seconds_between_clip_starts,
-            num_exp=NUM_EXP,
+            num_exp=num_experiments,
             warmup=2,
+            seed=torch_seed,
         )
         report_stats(times, num_frames, unit="ms")
 
 
 def main():
-    DEFAULT_VIDEO_PATH = Path(__file__).parent / "../../test/resources/nasa_13013.mp4"
     parser = argparse.ArgumentParser()
     parser.add_argument("--device", type=str, default="cpu")
     parser.add_argument("--video", type=str, default=str(DEFAULT_VIDEO_PATH))
+    parser.add_argument("--num_experiments", type=int, default=DEFAULT_NUM_EXP)
+    parser.add_argument("--torch_seed", type=int, default=DEFAULT_TORCH_SEED)
     args = parser.parse_args()
-    run_sampler_benchmarks(args.device, args.video)
+    run_sampler_benchmarks(
+        args.device, args.video, args.num_experiments, args.torch_seed
+    )
 
 
 if __name__ == "__main__":