chore: import upstream snapshot with attribution

tests/benchmarks/unflatten_bench.py

@@ -0,0 +1,146 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+
+#!/usr/bin/env python
+
+# run the benchmark under timeit (-t), cProfile (-c), line_profiler (-l)
+#
+# usage:
+# ./unflatten_bench.py -t
+# ./unflatten_bench.py -c
+# kernprof -l unflatten_bench.py -l; python -m line_profiler  unflatten_bench.py.lprof
+
+import argparse
+import gc
+import torch
+from torch._utils import _flatten_dense_tensors, _unflatten_dense_tensors
+from deepspeed.accelerator import get_accelerator
+from deepspeed.ops.op_builder import UtilsBuilder
+
+from apex_C import flatten as flatten_apex
+from apex_C import unflatten as unflatten_apex
+
+util_ops = UtilsBuilder().load()
+flatten = util_ops.flatten
+unflatten = util_ops.unflatten
+
+torch.manual_seed(0)
+# emulate a small typical model weights
+x = [
+    torch.rand((512, 512)).to(get_accelerator().device_name()),
+    torch.rand((512, 1024)).to(get_accelerator().device_name()),
+    torch.rand((512, 30000)).to(get_accelerator().device_name())
+]
+unflat_t = x * 30
+
+# warm up and check that the same output is produced
+flat_py = _flatten_dense_tensors(unflat_t)
+flat_cpp = flatten(unflat_t)
+flat_apex = flatten_apex(unflat_t)
+#numel = flat_cpp.numel()
+assert torch.eq(flat_py, flat_cpp).all(), "both produce the same tensor"
+assert torch.eq(flat_py, flat_apex).all(), "both produce the same tensor"
+
+flat_t = flat_py
+unflat_py = _unflatten_dense_tensors(flat_py, unflat_t)
+for i in range(len(unflat_t)):
+    assert torch.eq(unflat_t[i], unflat_py[i]).all()
+unflat_cpp = _unflatten_dense_tensors(flat_cpp, unflat_t)
+for i in range(len(unflat_t)):
+    assert torch.eq(unflat_t[i], unflat_cpp[i]).all()
+unflat_apex = _unflatten_dense_tensors(flat_apex, unflat_t)
+for i in range(len(unflat_t)):
+    assert torch.eq(unflat_t[i], unflat_apex[i]).all()
+
+
+# the programs being tested
+def py():
+    for i in range(1000):
+        unflat = _unflatten_dense_tensors(flat_t, unflat_t)
+
+
+def cpp():
+    for i in range(1000):
+        unflat = unflatten(flat_t, unflat_t)
+
+
+def apex():
+    for i in range(1000):
+        unflat = unflatten_apex(flat_t, unflat_t)
+
+
+#### cProfile ####
+
+import cProfile
+
+
+def cprofileme():
+    print("--------------- cProfile -----------------")
+    print("py")
+    cProfile.run("py()", sort=-1)
+    gc.collect()
+    get_accelerator().empty_cache()
+    print("cpp")
+    cProfile.run("cpp()", sort=-1)
+    gc.collect()
+    get_accelerator().empty_cache()
+    print("apex")
+    cProfile.run("apex()", sort=-1)
+    gc.collect()
+    get_accelerator().empty_cache()
+
+
+#### timeit ####
+
+import timeit
+
+
+def timeme():
+    print("--------------- timeit -----------------")
+    print(f'py  ={timeit.Timer("py()", globals=globals()).timeit(number=1)}')
+    gc.collect()
+    get_accelerator().empty_cache()
+    print(f'cpp ={timeit.Timer("cpp()", globals=globals()).timeit(number=1)}')
+    gc.collect()
+    get_accelerator().empty_cache()
+    print(f'apex={timeit.Timer("apex()", globals=globals()).timeit(number=1)}')
+    gc.collect()
+    get_accelerator().empty_cache()
+
+
+#### line_profiler ####
+# this one requires a special way to be called
+# pip install line_profiler
+# kernprof -l unflatten_bench.py -l; python -m line_profiler unflatten_bench.py.lprof
+
+
+def line_profileme():
+    print("--------------- line_profier -----------------")
+    print("py")
+    profile(py)()  # noqa: F821 # type: ignore
+    gc.collect()
+    get_accelerator().empty_cache()
+    print("cpp")
+    profile(cpp)()  # noqa: F821 # type: ignore
+    gc.collect()
+    get_accelerator().empty_cache()
+    print("apex")
+    profile(apex)()  # noqa: F821 # type: ignore
+    gc.collect()
+    get_accelerator().empty_cache()
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-l", action='store_true')
+    parser.add_argument("-c", action='store_true')
+    parser.add_argument("-t", action='store_true')
+    args = parser.parse_args()
+    if args.l:
+        line_profileme()
+    elif args.c:
+        cprofileme()
+    elif args.t:
+        timeme()