Possible fix for CI failures (#617)

Author: jansel

test/test_autotuner.py

@@ -131,7 +131,8 @@ def test_random_search(self):
             torch.randn([512, 512], device=DEVICE),
         )
         bound_kernel = examples_matmul.bind(args)
-        best = RandomSearch(bound_kernel, args, 10).autotune()
+        random.seed(123)
+        best = RandomSearch(bound_kernel, args, 20).autotune()
         fn = bound_kernel.compile_config(best)
         torch.testing.assert_close(fn(*args), args[0] @ args[1], rtol=1e-2, atol=1e-1)
 
@@ -142,6 +143,7 @@ def test_differential_evolution_search(self):
             torch.randn([512, 512], device=DEVICE),
         )
         bound_kernel = examples_matmul.bind(args)
+        random.seed(123)
         best = DifferentialEvolutionSearch(
             bound_kernel, args, 5, num_generations=3
         ).autotune()