update linear bench

Author: drisspg

benchmarks/bench_linear_float8.py

@@ -56,6 +56,7 @@ class Experiment:
     dtype: torch.dtype
     compiled: bool = False
     float_8_dtype: Optional[torch.dtype] = torch.float8_e4m3fn
+    recompute_weight_cast: bool = False
 
     # 3 Times since we are calculating forward backward
     @property
@@ -95,9 +96,14 @@ def main(
     }
     input_bias = False
     ref_dtypes = [torch.bfloat16, torch.float16]
+    recompute_weight_casts = [True, False]
     experiment_list: List[Experiment] = []
-    for idx, (dtype, (name, (K, N))) in enumerate(
-        tqdm(list(product(ref_dtypes, name_to_shapes_70b.items())))
+    for idx, (dtype, (name, (K, N)), recompute_weight_cast) in enumerate(
+        tqdm(
+            list(
+                product(ref_dtypes, name_to_shapes_70b.items(), recompute_weight_casts)
+            )
+        )
     ):
         if n_limit is not None and idx >= n_limit:
             break
@@ -106,7 +112,9 @@ def main(
         )
 
         linear_float8 = Float8Linear.from_float(
-            copy.deepcopy(linear_ref), emulate=False
+            copy.deepcopy(linear_ref),
+            emulate=False,
+            recompute_weight_cast=recompute_weight_cast,
         )
 
         bsz, seq_len = 4, 4096
@@ -155,6 +163,7 @@ def wrapper(*args, **kwargs):
             float8_time,
             dtype,
             compile,
+            recompute_weight_cast=recompute_weight_cast,
         )
         print(experiment)
         print("float8 speedup", experiment.ref_time_sec / experiment.float8_time_sec)
@@ -169,6 +178,7 @@ def wrapper(*args, **kwargs):
         "ref_dtype",
         "compiled",
         "fp8_dtype",
+        "recompute_weight_cast",
         "ref_time_sec",
         "pt_fp8_time_sec",
         "ref_tops_sec",
@@ -187,6 +197,7 @@ def wrapper(*args, **kwargs):
                 experiment.dtype,
                 experiment.compiled,
                 experiment.float_8_dtype,
+                experiment.recompute_weight_cast,
                 experiment.ref_time_sec,
                 experiment.float8_time_sec,
                 experiment.ref_tops_sec,
@@ -214,6 +225,7 @@ def wrapper(*args, **kwargs):
             "shape",
             "ref_dtype",
             "compiled",
+            "recompute_weight_cast",
             "ref_time_sec",
             "pt_fp8_time_sec",
             "pt_fp8_speedup",