Test cleanup (#1576)

* Testing cleanup

* More test cleanup

* Additional deprecations/removals.

* Skip benchmark, deprecated, slow tests by default

Author: matthewdouglas

benchmarking/optimizer_benchmark.py

@@ -0,0 +1,56 @@
+"""
+Extracted from tests/test_optim.py
+
+Usage: pytest benchmarking/optimizer_benchmark.py
+"""
+
+import time
+
+import pytest
+from tests.helpers import describe_dtype, id_formatter
+import torch
+
+import bitsandbytes as bnb
+
+str2optimizers = {"paged_adamw": (torch.optim.AdamW, bnb.optim.PagedAdamW)}
+
+
+@pytest.mark.parametrize("dim1", [2 * 1024], ids=id_formatter("dim1"))
+@pytest.mark.parametrize("gtype", [torch.float16], ids=describe_dtype)
+@pytest.mark.parametrize("optim_name", ["paged_adamw"], ids=id_formatter("optim_name"))
+@pytest.mark.parametrize("mode", ["bnb"], ids=id_formatter("mode"))
+@pytest.mark.benchmark
+def test_stream_optimizer_bench(dim1, gtype, optim_name, mode):
+    layers1 = torch.nn.Sequential(*torch.nn.ModuleList([torch.nn.Linear(dim1, dim1) for i in range(10)]))
+    layers1 = layers1.to(gtype)
+    layers1 = layers1.cuda()
+
+    large_tensor = None
+    if mode == "torch":
+        optim = str2optimizers[optim_name][0](layers1.parameters())
+    else:
+        optim = str2optimizers[optim_name][1](layers1.parameters())
+        # 12 GB
+        large_tensor = torch.empty((int(4.5e9),), device="cuda")
+
+    torch.cuda.synchronize()
+    time.sleep(5)
+
+    num_batches = 5
+    batches = torch.randn(num_batches, 128, dim1, device="cuda").to(gtype)
+    lbls = torch.randint(0, 10, size=(num_batches, 128)).cuda()
+
+    for i in range(num_batches):
+        print(i)
+        b = batches[i]
+        if i == 2:
+            torch.cuda.synchronize()
+            t0 = time.time()
+
+        out1 = layers1(b)
+
+        loss1 = torch.nn.functional.cross_entropy(out1, lbls[i]).mean()
+        loss1.backward()
+        optim.step()
+    torch.cuda.synchronize()
+    print(mode, time.time() - t0)