[JAX] add multiprocessing example and improve debugging message (#198)

* add mp example
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* refactor
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* update doc-string
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* better FP8 checker
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* update readme
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* replace te.* with te.flax* to remove deprecated warning
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* remove nouse os.environ
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* remove nouse
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* fix typo
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* Update examples/jax/encoder/README.md
Co-authored-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>
Signed-off-by: Jeng Bai-Cheng <jeng1220@users.noreply.github.com>
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* Update examples/jax/encoder/README.md
Co-authored-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>
Signed-off-by: Jeng Bai-Cheng <jeng1220@users.noreply.github.com>
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* Update examples/jax/encoder/README.md
Co-authored-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>
Signed-off-by: Jeng Bai-Cheng <jeng1220@users.noreply.github.com>
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* Update examples/jax/encoder/README.md
Co-authored-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>
Signed-off-by: Jeng Bai-Cheng <jeng1220@users.noreply.github.com>
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* Update examples/jax/encoder/test_multiprocessing_encoder.py
Co-authored-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>
Signed-off-by: Jeng Bai-Cheng <jeng1220@users.noreply.github.com>
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* remove cuda-python
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* adjust readme
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* Update examples/jax/encoder/README.md
Signed-off-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* fix cpp lint

fix issue of "Could not find a newline character at the end of the file."
Signed-off-by: Jeng Bai-Cheng <jeng1220@users.noreply.github.com>
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* fix AssertionError: 1 GPU per process
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* replace tfds with datasets

The Flax application crash if it use TensorFlow Dataset (tfds) in NVIDIA JAX container.
The tfds is very useful for downloading well-knwon dataset (e.g., MNIST, GLUE) and commonly used by TF/JAX community.
However, it seems like that it is NOT compatible with NVIDIA TensorFlow in NVIDIA JAX container and somehow affects JAX.
It triggers random errors at JAX initialization depending on different versions, and make CI unstable.
Thus, this commit replaces tfds with "huggingface datasets" to download needed datasets.
See "nvbugs 4039266" for more details.
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* fix input sharding

Unlike SPMD mode, in multiprocessing mode, the input tensor must be sharded manually.
Using DP=4, TP=2 as an example, the device mesh looks like:

mesh.device_ids = [[0, 1],
                   [2, 3],
                   [4, 5],
                   [6, 7]]

Assume that the process ID is mapped to GPU ID.
The process 0 and process 1 are grouped for model parallelism,
process 2 and process 3 are grouped together too, and so on.

The process 0 and process 1 need to share the same micro-batch in the training step,
process 0 and process 2, 4, and 6 have different micro-batch.

Thus, `shard_array_wrapper` partitions inputs to 4 parts (and setup
needed arguments for jax.make_array_from_single_device_arrays).
The process 0 and process 1 take the first quarter,
process 2 and process 3 take the second quarter, and so on.
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* refactor UT for multiprocess example

Use Python `multiprocessing` to test the multiprocessing example,
if the system has multiple GPU. 1 GPU per process.

Because `jax.distributed.initialize` must be called before any other JAX or Flax API,
GPU info cannot be queried by calling jax.local_devices() in TestEncoder.
Thus, `unittest_query_gpu()` forks another process to query number of GPUs and
FP8 capability.
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* remove nouse arg `--num-gpu`

JAX doesn't have an API to setup number of GPU used in SPMD mode.
The only way is to use `CUDA_VISIBLE_DEVICES` for now.
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* fix typo
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* fix ut
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* simplify the mask setting
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* increase batch-size for multigpu example

The batch-size 64 is too small to be partitioned for 8xH100.
If batch-size is 64, the GEMM shape is 256x8192x8 per GPU.
The 8 is too small for FP8 GEMM kernel, and
cuBLASLt will throw "Failed to query heuristics".
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

* fix downloading mnist error

To download MNIST via `huggingface datasets`, it requires Pillow.
Otherwise, it throws `An error occurred while generating the
dataset`
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>

---------
Signed-off-by: Ryan Jeng <rjeng@nvidia.com>
Signed-off-by: Jeng Bai-Cheng <jeng1220@users.noreply.github.com>
Signed-off-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>
Co-authored-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>
Co-authored-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>

examples/jax/encoder/README.md

@@ -35,7 +35,14 @@ python test_single_gpu_encoder.py --use-fp8
 
 6. Fill in `params_pspec` and `encoder.init` to pjit to get a compiled function, `pjit_encoder_init `, and use it to initialize the model, so JAX now can know how to do the sharding.
 
-7. The `train_step` and `eval_step` also needs to be compiled by pjit. Thus, every input and output argument has to be set up `PartitionSpec` if the argument contains a tensor. For instance, the `input_pspec` is `PartitionSpec('data', None)` because the input shape is (batch size, sequence length). Then, the rest of the workflow is similar to the previous example.
+7. The `train_step` and `eval_step` also need to be compiled by pjit. Thus, every input and output argument has to be set up `PartitionSpec` if the argument contains a tensor. For instance, the `input_pspec` is `PartitionSpec('data', None)` because the input shape is (batch size, sequence length). Then, the rest of the workflow is similar to the previous example.
+
+8. Use `CUDA_VISIBLE_DEVICES` to control the number of GPUs used. For example, if the system has 8 GPUs but only 4 GPUs need to be used, then:
+   ```sh
+   export CUDA_VISIBLE_DEVICES=0,1,2,3
+   python test_multigpu_encoder.py
+   ```
+   Please refer to [CUDA Environment Variables](https://docs.nvidia.com/cuda/cuda-c-programming-guide/#cuda-environment-variables) for more details.
 
 ### Run ###
 
@@ -60,6 +67,10 @@ python test_multigpu_encoder.py --use-fp8
     import os
     os.environ['XLA_FLAGS'] = "--xla_dump_hlo_as_proto --xla_dump_hlo_as_text --xla_dump_hlo_as_html --xla_dump_to=<path to store XLA HLO>"
     ```
+5. If the model parallelism example is run in the container, it is recommended to add `--ipc=host` in launch arguments. Otherwise, it might trigger UCX errors.
+   ```sh
+   docker run --gpus=all --ipc=host ...
+   ```
 
 ### Run ###
 
@@ -67,3 +78,62 @@ python test_multigpu_encoder.py --use-fp8
 python test_model_parallel_encoder.py
 python test_model_parallel_encoder.py --use-fp8
 ```
+
+
+## Multiple Processes with Model Parallelism ##
+
+1. This example inherits previous model parallelism example, but uses multiprocessing instead of single-program multiple-data (SPMD). It uses 1 GPU per process.
+
+2. The benefit of multiprocessing is to setup hardware affinity for GPUs, such as NUMA binding. It may help improve performance and stability. Please refer to [Best Practices When Benchmarking CUDA Applications](https://www.nvidia.com/en-us/on-demand/session/gtcsiliconvalley2019-s9956/) for more details.
+
+3. The quick way to check system topology is to use `nvidia-smi`, for example:
+   ```sh
+   $ nvidia-smi topo -mp
+           CPU Affinity    NUMA Affinity
+   GPU0    48-63,176-191   3
+   GPU1    48-63,176-191   3
+   GPU2    16-31,144-159   1
+   GPU3    16-31,144-159   1
+   GPU4    112-127,240-255 7
+   GPU5    112-127,240-255 7
+   GPU6    80-95,208-223   5
+   GPU7    80-95,208-223   5
+   ```
+
+4. It is recommended to set the environment variable `CUDA_DEVICE_ORDER` to `PCI_BUS_ID` before running the example with the affinity setting. To ensure that the device order is aligned between CUDA and `nvidia-smi`. Please refer to [CUDA Environment Variables](https://docs.nvidia.com/cuda/cuda-c-programming-guide/#cuda-environment-variables) for more details.
+
+5. `jax.distributed.initialize` must be called before any other JAX or Flax API, otherwise `jax.local_devices` will be incorrect. `jax.distributed.shutdown` should be the last API call.
+
+6. Unlike SPMD, the input tensor must be sharded manually and be wrapped by `jax.make_array_from_single_device_arrays`. Otherwise, the sharding will be incorrect. Using DP=4, TP=2 as an example, the device mesh looks like:
+   ```python
+   mesh.device_ids = [[0, 1],
+                      [2, 3],
+                      [4, 5],
+                      [6, 7]]
+   ```
+   Assume that the process ID is mapped to GPU ID. The process 0 and process 1 are grouped for model parallelism, the process 2 and process 3 are grouped together too, and so on. Thus, process 0 and process 1 need to share the same micro-batch in the training step, process 0 and process 2, 4, and 6 have different micro-batch.
+
+### Run ###
+
+If the system has 8 GPUs, the basic commands are:
+```bash
+python test_multiprocessing_encoder.py --num-process 8 --process-id 0 &
+python test_multiprocessing_encoder.py --num-process 8 --process-id 1 &
+python test_multiprocessing_encoder.py --num-process 8 --process-id 2 &
+python test_multiprocessing_encoder.py --num-process 8 --process-id 3 &
+python test_multiprocessing_encoder.py --num-process 8 --process-id 4 &
+python test_multiprocessing_encoder.py --num-process 8 --process-id 5 &
+python test_multiprocessing_encoder.py --num-process 8 --process-id 6 &
+python test_multiprocessing_encoder.py --num-process 8 --process-id 7 &
+```
+The correct setting for hardware affinity is system dependent. Taking the above system topology as an example, the command can be:
+```bash
+numactl --cpunodebind=48  --membind=3 python test_multiprocessing_encoder.py --num-process 8 --process-id 0 &
+numactl --cpunodebind=49  --membind=3 python test_multiprocessing_encoder.py --num-process 8 --process-id 1 &
+numactl --cpunodebind=16  --membind=1 python test_multiprocessing_encoder.py --num-process 8 --process-id 2 &
+numactl --cpunodebind=17  --membind=1 python test_multiprocessing_encoder.py --num-process 8 --process-id 3 &
+numactl --cpunodebind=112 --membind=7 python test_multiprocessing_encoder.py --num-process 8 --process-id 4 &
+numactl --cpunodebind=113 --membind=7 python test_multiprocessing_encoder.py --num-process 8 --process-id 5 &
+numactl --cpunodebind=80  --membind=5 python test_multiprocessing_encoder.py --num-process 8 --process-id 6 &
+numactl --cpunodebind=81  --membind=5 python test_multiprocessing_encoder.py --num-process 8 --process-id 7 &
+```
\ No newline at end of file

examples/jax/encoder/requirements.txt

+datasets
 flax
 nltk
 optax
-tensorflow-datasets

examples/jax/encoder/test_model_parallel_encoder.py

 # Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 #
 # See LICENSE for license information.
-""" Encoder training on multi-GPU with tesnor parallelism"""
+"""Encoder training on multi-GPU with tesnor parallelism"""
 import argparse
 import unittest
 from functools import partial
@@ -11,10 +11,10 @@ import jax.numpy as jnp
 import nltk
 import numpy as np
 import optax
-import tensorflow_datasets as tfds
-from cuda import cudart
+from datasets import load_dataset
 from flax import linen as nn
 from flax.core.frozen_dict import FrozenDict
+from flax.linen import partitioning as nn_partitioning
 from flax.training import train_state
 from jax.experimental import mesh_utils
 from jax.experimental.pjit import pjit
@@ -31,26 +31,6 @@ DROPOUT_KEY = 'dropout'
 INPUT_KEY = 'input_rng'
 
 
-def check_num_gpu(desired_num_gpu):
-    """Check if the number of GPUs are correct."""
-    actual_num_gpu = len(jax.local_devices())
-    assert actual_num_gpu == desired_num_gpu, f"Number of GPUs is mismatch. " \
-        f"{desired_num_gpu} GPUs are assigned, but the actual number of GPUs is {actual_num_gpu}"
-
-
-def gpu_has_fp8():
-    """Check if the GPU has FP8."""
-    cudaSuccess = cudart.cudaError_t.cudaSuccess
-    ret, gpu_id = cudart.cudaGetDevice()
-    assert ret == cudaSuccess
-    flag = cudart.cudaDeviceAttr.cudaDevAttrComputeCapabilityMajor
-    _, major = cudart.cudaDeviceGetAttribute(flag, gpu_id)
-    flag = cudart.cudaDeviceAttr.cudaDevAttrComputeCapabilityMinor
-    _, minor = cudart.cudaDeviceGetAttribute(flag, gpu_id)
-    sm_arch = major * 10 + minor
-    return sm_arch >= 89
-
-
 class Net(nn.Module):
     """NLP Encoder"""
     num_embed: int
@@ -66,7 +46,7 @@ class Net(nn.Module):
                              hidden_dropout=0.1,
                              attention_dropout=0.1,
                              dropout_rng_name=DROPOUT_KEY,
-                             layer_type=te.TransformerLayerType.ENCODER,
+                             layer_type=te.flax.TransformerLayerType.ENCODER,
                              enable_relative_embedding=False,
                              dtype=jnp.bfloat16)
         x = te_Encoder()(x, attention_mask=mask, deterministic=disable_dropout)
@@ -177,12 +157,11 @@ def data_preprocess(dataset, vocab, word_id, max_seq_len):
     nltk.download('punkt')
     dataset_size = len(dataset['sentence'])
     output = np.zeros((dataset_size, max_seq_len), dtype=np.int32)
-    mask_3d = np.empty((dataset_size, max_seq_len, max_seq_len), dtype=np.uint8)
+    mask_3d = np.ones((dataset_size, max_seq_len, max_seq_len), dtype=np.uint8)
 
     for j, sentence in enumerate(dataset['sentence']):
-        tokens = nltk.word_tokenize(sentence.decode("utf-8"))
+        tokens = nltk.word_tokenize(sentence)
         tensor = output[j]
-        mask_1d = np.zeros((1, max_seq_len), dtype=np.uint8)
 
         for i, word in enumerate(tokens):
             if i >= max_seq_len:
@@ -195,26 +174,31 @@ def data_preprocess(dataset, vocab, word_id, max_seq_len):
             else:
                 tensor[i] = vocab[word]
 
-            mask_1d[0, i] = 1
-
+        seq_len = len(tokens)
+        if seq_len > max_seq_len:
+            seq_len = max_seq_len
         mask_2d = mask_3d[j]
-        np.dot(mask_1d.T, mask_1d, out=mask_2d)
-        np.subtract(1, mask_2d, out=mask_2d)
+        mask_2d[:seq_len, :seq_len] = 0
 
-    dataset['sentence'] = output
-    dataset['label'] = dataset['label'].astype(np.float32)
-    dataset['mask'] = mask_3d.reshape((dataset_size, 1, max_seq_len, max_seq_len))
-    return dataset, vocab, word_id
+    new_dataset = {
+        'sentence': output,
+        'label': dataset['label'].astype(np.float32),
+        'mask': mask_3d.reshape((dataset_size, 1, max_seq_len, max_seq_len))
+    }
+    return new_dataset, vocab, word_id
 
 
 def get_datasets(max_seq_len):
     """Load GLUE train and test datasets into memory."""
     vocab = {}
     word_id = 0
-    dataset = 'glue/cola'
-    train_ds = tfds.as_numpy(tfds.load(dataset, split='train', batch_size=-1))
+
+    train_ds = load_dataset('glue', 'cola', split='train')
+    train_ds.set_format(type='np')
     train_ds, vocab, word_id = data_preprocess(train_ds, vocab, word_id, max_seq_len)
-    test_ds = tfds.as_numpy(tfds.load(dataset, split='validation', batch_size=-1))
+
+    test_ds = load_dataset('glue', 'cola', split='validation')
+    test_ds.set_format(type='np')
     test_ds, vocab, word_id = data_preprocess(test_ds, vocab, word_id, max_seq_len)
     return train_ds, test_ds, word_id
 
@@ -238,7 +222,7 @@ def get_params_pspec(sharding_rules, abs_var_collect):
         return jax.sharding.PartitionSpec(*partitions)
 
     params_axes = abs_var_collect.get(PARAMS_AXES_KEY, {})
-    params_axes_pspec = jax.tree_map(to_device_axis, nn.partitioning.get_axis_names(params_axes))
+    params_axes_pspec = jax.tree_map(to_device_axis, nn_partitioning.get_axis_names(params_axes))
     params_pspec = jax.tree_map(lambda x: jax.sharding.PartitionSpec(), abs_var_collect[PARAMS_KEY])
     params_pspec = FrozenDict({**params_pspec, **params_axes_pspec})
     return params_pspec
@@ -257,14 +241,12 @@ def get_state_pspec(state, params_pspec):
 def train_and_evaluate(args):
     """Execute model training and evaluation loop."""
     print(args)
-    check_num_gpu(args.num_gpu)
-
-    if args.use_fp8:
-        assert gpu_has_fp8(), "GPU needs to support FP8."
+    train_ds, test_ds, num_embed = get_datasets(args.max_seq_len)
 
+    num_gpu = jax.local_device_count()
     num_gpu_tp = 2
-    if args.num_gpu % num_gpu_tp == 0:
-        num_gpu_dp = args.num_gpu // num_gpu_tp
+    if num_gpu % num_gpu_tp == 0:
+        num_gpu_dp = num_gpu // num_gpu_tp
     else:
         num_gpu_dp = 1
         num_gpu_tp = 1
@@ -287,14 +269,13 @@ def train_and_evaluate(args):
 
         with te.fp8_autocast(args.use_fp8,
                              sharding_resource=te.ShardingResource(DEVICE_DP_AXIS, DEVICE_TP_AXIS)):
-            train_ds, test_ds, num_embed = get_datasets(args.max_seq_len)
             encoder = Net(num_embed)
             inputs = jnp.zeros(input_shape, dtype=jnp.int32)
             masks = jnp.zeros(mask_shape, dtype=jnp.uint8)
             abs_var_collect = jax.eval_shape(encoder.init, init_rngs, inputs, masks)
 
             customized_rules = ((NAMED_BROADCAST_AXIS, None), (NAMED_TP_AXIS, DEVICE_TP_AXIS))
-            sharding_rules = te.extend_logical_axis_rules(tuple()) + customized_rules
+            sharding_rules = te.flax.extend_logical_axis_rules(tuple()) + customized_rules
             params_pspec = get_params_pspec(sharding_rules, abs_var_collect)
             inputs_pspec = jax.sharding.PartitionSpec(DEVICE_DP_AXIS, None)
             masks_pspec = jax.sharding.PartitionSpec(DEVICE_DP_AXIS, None, None, None)
@@ -356,13 +337,6 @@ def train_and_evaluate(args):
 def encoder_parser(args):
     """Training settings."""
     parser = argparse.ArgumentParser(description="JAX Encoder Example")
-    parser.add_argument(
-        "--num-gpu",
-        type=int,
-        default=8,
-        metavar="N",
-        help="number of GPUs (default: 8)",
-    )
     parser.add_argument(
         "--batch-size",
         type=int,
@@ -416,20 +390,19 @@ def encoder_parser(args):
 class TestEncoder(unittest.TestCase):
     """Encoder unittests"""
 
+    gpu_has_fp8, reason = te.fp8.is_fp8_available()
+
     @classmethod
     def setUpClass(cls):
         """Run 3 epochs for testing"""
-        num_gpu = len(jax.local_devices())
-        if num_gpu % 2 != 0:
-            num_gpu = 1
-        cls.args = encoder_parser(["--epochs", "3", "--num-gpu", str(num_gpu)])
+        cls.args = encoder_parser(["--epochs", "3"])
 
     def test_te_bf16(self):
         """Test Transformer Engine with BF16"""
         actual = train_and_evaluate(self.args)
         assert actual[0] < 0.45 and actual[1] > 0.79
 
-    @unittest.skipIf(not gpu_has_fp8(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not gpu_has_fp8, reason)
     def test_te_fp8(self):
         """Test Transformer Engine with FP8"""
         self.args.use_fp8 = True

examples/jax/encoder/test_multigpu_encoder.py

 # Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 #
 # See LICENSE for license information.
-""" Encoder training on multi-GPU with data parallelism"""
+"""Encoder training on multi-GPU with data parallelism"""
 import argparse
 import unittest
 from functools import partial
@@ -11,10 +11,10 @@ import jax.numpy as jnp
 import nltk
 import numpy as np
 import optax
-import tensorflow_datasets as tfds
-from cuda import cudart
+from datasets import load_dataset
 from flax import linen as nn
 from flax.core.frozen_dict import FrozenDict
+from flax.linen import partitioning as nn_partitioning
 from flax.training import train_state
 from jax.experimental import mesh_utils
 from jax.experimental.pjit import pjit
@@ -28,26 +28,6 @@ DROPOUT_KEY = 'dropout'
 INPUT_KEY = 'input_rng'
 
 
-def check_num_gpu(desired_num_gpu):
-    """Check if the number of GPUs are correct."""
-    actual_num_gpu = len(jax.local_devices())
-    assert actual_num_gpu == desired_num_gpu, f"Number of GPUs is mismatch. " \
-        f"{desired_num_gpu} GPUs are assigned, but the actual number of GPUs is {actual_num_gpu}"
-
-
-def gpu_has_fp8():
-    """Check if the GPU has FP8."""
-    cudaSuccess = cudart.cudaError_t.cudaSuccess
-    ret, gpu_id = cudart.cudaGetDevice()
-    assert ret == cudaSuccess
-    flag = cudart.cudaDeviceAttr.cudaDevAttrComputeCapabilityMajor
-    _, major = cudart.cudaDeviceGetAttribute(flag, gpu_id)
-    flag = cudart.cudaDeviceAttr.cudaDevAttrComputeCapabilityMinor
-    _, minor = cudart.cudaDeviceGetAttribute(flag, gpu_id)
-    sm_arch = major * 10 + minor
-    return sm_arch >= 89
-
-
 class Net(nn.Module):
     """NLP Encoder"""
     num_embed: int
@@ -63,7 +43,7 @@ class Net(nn.Module):
                              hidden_dropout=0.1,
                              attention_dropout=0.1,
                              dropout_rng_name=DROPOUT_KEY,
-                             layer_type=te.TransformerLayerType.ENCODER,
+                             layer_type=te.flax.TransformerLayerType.ENCODER,
                              enable_relative_embedding=False,
                              dtype=jnp.bfloat16)
         x = te_Encoder()(x, attention_mask=mask, deterministic=disable_dropout)
@@ -168,12 +148,11 @@ def data_preprocess(dataset, vocab, word_id, max_seq_len):
     nltk.download('punkt')
     dataset_size = len(dataset['sentence'])
     output = np.zeros((dataset_size, max_seq_len), dtype=np.int32)
-    mask_3d = np.empty((dataset_size, max_seq_len, max_seq_len), dtype=np.uint8)
+    mask_3d = np.ones((dataset_size, max_seq_len, max_seq_len), dtype=np.uint8)
 
     for j, sentence in enumerate(dataset['sentence']):
-        tokens = nltk.word_tokenize(sentence.decode("utf-8"))
+        tokens = nltk.word_tokenize(sentence)
         tensor = output[j]
-        mask_1d = np.zeros((1, max_seq_len), dtype=np.uint8)
 
         for i, word in enumerate(tokens):
             if i >= max_seq_len:
@@ -186,26 +165,31 @@ def data_preprocess(dataset, vocab, word_id, max_seq_len):
             else:
                 tensor[i] = vocab[word]
 
-            mask_1d[0, i] = 1
-
+        seq_len = len(tokens)
+        if seq_len > max_seq_len:
+            seq_len = max_seq_len
         mask_2d = mask_3d[j]
-        np.dot(mask_1d.T, mask_1d, out=mask_2d)
-        np.subtract(1, mask_2d, out=mask_2d)
+        mask_2d[:seq_len, :seq_len] = 0
 
-    dataset['sentence'] = output
-    dataset['label'] = dataset['label'].astype(np.float32)
-    dataset['mask'] = mask_3d.reshape((dataset_size, 1, max_seq_len, max_seq_len))
-    return dataset, vocab, word_id
+    new_dataset = {
+        'sentence': output,
+        'label': dataset['label'].astype(np.float32),
+        'mask': mask_3d.reshape((dataset_size, 1, max_seq_len, max_seq_len))
+    }
+    return new_dataset, vocab, word_id
 
 
 def get_datasets(max_seq_len):
     """Load GLUE train and test datasets into memory."""
     vocab = {}
     word_id = 0
-    dataset = 'glue/cola'
-    train_ds = tfds.as_numpy(tfds.load(dataset, split='train', batch_size=-1))
+
+    train_ds = load_dataset('glue', 'cola', split='train')
+    train_ds.set_format(type='np')
     train_ds, vocab, word_id = data_preprocess(train_ds, vocab, word_id, max_seq_len)
-    test_ds = tfds.as_numpy(tfds.load(dataset, split='validation', batch_size=-1))
+
+    test_ds = load_dataset('glue', 'cola', split='validation')
+    test_ds.set_format(type='np')
     test_ds, vocab, word_id = data_preprocess(test_ds, vocab, word_id, max_seq_len)
     return train_ds, test_ds, word_id
 
@@ -229,7 +213,7 @@ def get_params_pspec(sharding_rules, abs_var_collect):
         return jax.sharding.PartitionSpec(*partitions)
 
     params_axes = abs_var_collect.get(PARAMS_AXES_KEY, {})
-    params_axes_pspec = jax.tree_map(to_device_axis, nn.partitioning.get_axis_names(params_axes))
+    params_axes_pspec = jax.tree_map(to_device_axis, nn_partitioning.get_axis_names(params_axes))
     params_pspec = jax.tree_map(lambda x: jax.sharding.PartitionSpec(), abs_var_collect[PARAMS_KEY])
     params_pspec = FrozenDict({**params_pspec, **params_axes_pspec})
     return params_pspec
@@ -248,15 +232,14 @@ def get_state_pspec(state, params_pspec):
 def train_and_evaluate(args):
     """Execute model training and evaluation loop."""
     print(args)
-    check_num_gpu(args.num_gpu)
-    assert args.batch_size % args.num_gpu == 0, f"Batch size needs to be multiple of {args.num_gpu}"
-    assert args.test_batch_size % args.num_gpu == 0, \
-        f"Test batch size needs to be multiple of {args.num_gpu}"
+    train_ds, test_ds, num_embed = get_datasets(args.max_seq_len)
 
-    if args.use_fp8:
-        assert gpu_has_fp8(), "GPU needs to support FP8."
+    num_gpu = jax.local_device_count()
+    assert args.batch_size % num_gpu == 0, f"Batch size needs to be multiple of {num_gpu}"
+    assert args.test_batch_size % num_gpu == 0, \
+        f"Test batch size needs to be multiple of {num_gpu}"
 
-    device_mesh = mesh_utils.create_device_mesh((args.num_gpu,))
+    device_mesh = mesh_utils.create_device_mesh((num_gpu,))
     with jax.sharding.Mesh(devices=device_mesh, axis_names=(DEVICE_DP_AXIS,)):
 
         rng = jax.random.PRNGKey(args.seed)
@@ -269,13 +252,12 @@ def train_and_evaluate(args):
         label_shape = [args.batch_size]
 
         with te.fp8_autocast(args.use_fp8, sharding_resource=te.ShardingResource(DEVICE_DP_AXIS)):
-            train_ds, test_ds, num_embed = get_datasets(args.max_seq_len)
             encoder = Net(num_embed)
             inputs = jnp.zeros(input_shape, dtype=jnp.int32)
             masks = jnp.zeros(mask_shape, dtype=jnp.uint8)
             abs_var_collect = jax.eval_shape(encoder.init, init_rngs, inputs, masks)
 
-            sharding_rules = te.extend_logical_axis_rules(tuple())
+            sharding_rules = te.flax.extend_logical_axis_rules(tuple())
             params_pspec = get_params_pspec(sharding_rules, abs_var_collect)
             inputs_pspec = jax.sharding.PartitionSpec(DEVICE_DP_AXIS, None)
             masks_pspec = jax.sharding.PartitionSpec(DEVICE_DP_AXIS, None, None, None)
@@ -337,26 +319,19 @@ def train_and_evaluate(args):
 def encoder_parser(args):
     """Training settings."""
     parser = argparse.ArgumentParser(description="JAX Encoder Example")
-    parser.add_argument(
-        "--num-gpu",
-        type=int,
-        default=8,
-        metavar="N",
-        help="number of GPUs (default: 8)",
-    )
     parser.add_argument(
         "--batch-size",
         type=int,
-        default=64,
+        default=128,
         metavar="N",
-        help="input batch size for training (default: 64)",
+        help="input batch size for training (default: 128)",
     )
     parser.add_argument(
         "--test-batch-size",
         type=int,
-        default=64,
+        default=128,
         metavar="N",
-        help="input batch size for testing (default: 64)",
+        help="input batch size for testing (default: 128)",
     )
     parser.add_argument(
         "--max-seq-len",
@@ -397,25 +372,24 @@ def encoder_parser(args):
 class TestEncoder(unittest.TestCase):
     """Encoder unittests"""
 
+    gpu_has_fp8, reason = te.fp8.is_fp8_available()
+
     @classmethod
     def setUpClass(cls):
         """Run 3 epochs for testing"""
-        num_gpu = len(jax.local_devices())
-        if num_gpu % 2 != 0:
-            num_gpu = 1
-        cls.args = encoder_parser(["--epochs", "3", "--num-gpu", str(num_gpu)])
+        cls.args = encoder_parser(["--epochs", "3"])
 
     def test_te_bf16(self):
         """Test Transformer Engine with BF16"""
         actual = train_and_evaluate(self.args)
-        assert actual[0] < 0.45 and actual[1] > 0.79
+        assert actual[0] < 0.49 and actual[1] > 0.76
 
-    @unittest.skipIf(not gpu_has_fp8(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not gpu_has_fp8, reason)
     def test_te_fp8(self):
         """Test Transformer Engine with FP8"""
         self.args.use_fp8 = True
         actual = train_and_evaluate(self.args)
-        assert actual[0] < 0.45 and actual[1] > 0.79
+        assert actual[0] < 0.49 and actual[1] > 0.76
 
 
 if __name__ == "__main__":

examples/jax/encoder/test_single_gpu_encoder.py

 # Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 #
 # See LICENSE for license information.
-""" Encoder training on single GPU"""
+"""Encoder training on single GPU"""
 import argparse
-import os
 import unittest
 from functools import partial
 
@@ -12,8 +11,7 @@ import jax.numpy as jnp
 import nltk
 import numpy as np
 import optax
-import tensorflow_datasets as tfds
-from cuda import cudart
+from datasets import load_dataset
 from flax import linen as nn
 from flax.core.frozen_dict import FrozenDict
 from flax.training import train_state
@@ -25,19 +23,6 @@ DROPOUT_KEY = 'dropout'
 INPUT_KEY = 'input_rng'
 
 
-def gpu_has_fp8():
-    """Check if the GPU has FP8."""
-    cudaSuccess = cudart.cudaError_t.cudaSuccess
-    ret, gpu_id = cudart.cudaGetDevice()
-    assert ret == cudaSuccess
-    flag = cudart.cudaDeviceAttr.cudaDevAttrComputeCapabilityMajor
-    _, major = cudart.cudaDeviceGetAttribute(flag, gpu_id)
-    flag = cudart.cudaDeviceAttr.cudaDevAttrComputeCapabilityMinor
-    _, minor = cudart.cudaDeviceGetAttribute(flag, gpu_id)
-    sm_arch = major * 10 + minor
-    return sm_arch >= 89
-
-
 class Net(nn.Module):
     """NLP Encoder"""
     num_embed: int
@@ -53,7 +38,7 @@ class Net(nn.Module):
                              hidden_dropout=0.1,
                              attention_dropout=0.1,
                              dropout_rng_name=DROPOUT_KEY,
-                             layer_type=te.TransformerLayerType.ENCODER,
+                             layer_type=te.flax.TransformerLayerType.ENCODER,
                              enable_relative_embedding=False,
                              dtype=jnp.bfloat16)
         x = te_Encoder()(x, attention_mask=mask, deterministic=disable_dropout)
@@ -158,12 +143,11 @@ def data_preprocess(dataset, vocab, word_id, max_seq_len):
     nltk.download('punkt')
     dataset_size = len(dataset['sentence'])
     output = np.zeros((dataset_size, max_seq_len), dtype=np.int32)
-    mask_3d = np.empty((dataset_size, max_seq_len, max_seq_len), dtype=np.uint8)
+    mask_3d = np.ones((dataset_size, max_seq_len, max_seq_len), dtype=np.uint8)
 
     for j, sentence in enumerate(dataset['sentence']):
-        tokens = nltk.word_tokenize(sentence.decode("utf-8"))
+        tokens = nltk.word_tokenize(sentence)
         tensor = output[j]
-        mask_1d = np.zeros((1, max_seq_len), dtype=np.uint8)
 
         for i, word in enumerate(tokens):
             if i >= max_seq_len:
@@ -176,26 +160,31 @@ def data_preprocess(dataset, vocab, word_id, max_seq_len):
             else:
                 tensor[i] = vocab[word]
 
-            mask_1d[0, i] = 1
-
+        seq_len = len(tokens)
+        if seq_len > max_seq_len:
+            seq_len = max_seq_len
         mask_2d = mask_3d[j]
-        np.dot(mask_1d.T, mask_1d, out=mask_2d)
-        np.subtract(1, mask_2d, out=mask_2d)
+        mask_2d[:seq_len, :seq_len] = 0
 
-    dataset['sentence'] = output
-    dataset['label'] = dataset['label'].astype(np.float32)
-    dataset['mask'] = mask_3d.reshape((dataset_size, 1, max_seq_len, max_seq_len))
-    return dataset, vocab, word_id
+    new_dataset = {
+        'sentence': output,
+        'label': dataset['label'].astype(np.float32),
+        'mask': mask_3d.reshape((dataset_size, 1, max_seq_len, max_seq_len))
+    }
+    return new_dataset, vocab, word_id
 
 
 def get_datasets(max_seq_len):
     """Load GLUE train and test datasets into memory."""
     vocab = {}
     word_id = 0
-    dataset = 'glue/cola'
-    train_ds = tfds.as_numpy(tfds.load(dataset, split='train', batch_size=-1))
+
+    train_ds = load_dataset('glue', 'cola', split='train')
+    train_ds.set_format(type='np')
     train_ds, vocab, word_id = data_preprocess(train_ds, vocab, word_id, max_seq_len)
-    test_ds = tfds.as_numpy(tfds.load(dataset, split='validation', batch_size=-1))
+
+    test_ds = load_dataset('glue', 'cola', split='validation')
+    test_ds.set_format(type='np')
     test_ds, vocab, word_id = data_preprocess(test_ds, vocab, word_id, max_seq_len)
     return train_ds, test_ds, word_id
 
@@ -210,11 +199,8 @@ def check_fp8(state, var_collect, inputs, masks, labels):
 
 def train_and_evaluate(args):
     """Execute model training and evaluation loop."""
-    os.environ["XLA_PYTHON_CLIENT_PREALLOCATE"] = "false"
     print(args)
-
-    if args.use_fp8:
-        assert gpu_has_fp8(), "GPU needs to support FP8."
+    train_ds, test_ds, num_embed = get_datasets(args.max_seq_len)
 
     rng = jax.random.PRNGKey(args.seed)
     rng, params_rng = jax.random.split(rng)
@@ -226,7 +212,6 @@ def train_and_evaluate(args):
     label_shape = [args.batch_size]
 
     with te.fp8_autocast(enabled=args.use_fp8):
-        train_ds, test_ds, num_embed = get_datasets(args.max_seq_len)
         encoder = Net(num_embed)
         inputs = jnp.zeros(input_shape, dtype=jnp.int32)
         masks = jnp.zeros(mask_shape, dtype=jnp.uint8)
@@ -322,6 +307,8 @@ def encoder_parser(args):
 class TestEncoder(unittest.TestCase):
     """Encoder unittests"""
 
+    gpu_has_fp8, reason = te.fp8.is_fp8_available()
+
     @classmethod
     def setUpClass(cls):
         """Run 4 epochs for testing"""
@@ -332,7 +319,7 @@ class TestEncoder(unittest.TestCase):
         actual = train_and_evaluate(self.args)
         assert actual[0] < 0.45 and actual[1] > 0.79
 
-    @unittest.skipIf(not gpu_has_fp8(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not gpu_has_fp8, reason)
     def test_te_fp8(self):
         """Test Transformer Engine with FP8"""
         self.args.use_fp8 = True

examples/jax/mnist/requirements.txt

+datasets
 flax
 optax
-tensorflow-datasets
+Pillow

examples/jax/mnist/test_single_gpu_mnist.py

@@ -3,7 +3,6 @@
 # See LICENSE for license information.
 """ MNIST training on single GPU"""
 import argparse
-import os
 import unittest
 from functools import partial
 
@@ -11,8 +10,7 @@ import jax
 import jax.numpy as jnp
 import numpy as np
 import optax
-import tensorflow_datasets as tfds
-from cuda import cudart
+from datasets import load_dataset
 from flax import linen as nn
 from flax.core.frozen_dict import FrozenDict
 from flax.training import train_state
@@ -27,19 +25,6 @@ DROPOUT_KEY = 'dropout'
 INPUT_KEY = 'input_rng'
 
 
-def gpu_has_fp8():
-    """Check if the GPU has FP8."""
-    cudaSuccess = cudart.cudaError_t.cudaSuccess
-    ret, gpu_id = cudart.cudaGetDevice()
-    assert ret == cudaSuccess
-    flag = cudart.cudaDeviceAttr.cudaDevAttrComputeCapabilityMajor
-    _, major = cudart.cudaDeviceGetAttribute(flag, gpu_id)
-    flag = cudart.cudaDeviceAttr.cudaDevAttrComputeCapabilityMinor
-    _, minor = cudart.cudaDeviceGetAttribute(flag, gpu_id)
-    sm_arch = major * 10 + minor
-    return sm_arch >= 89
-
-
 class Net(nn.Module):
     """CNN model for MNIST."""
     use_te: bool = False
@@ -144,13 +129,23 @@ def eval_model(state, test_ds, batch_size, var_collect):
 
 def get_datasets():
     """Load MNIST train and test datasets into memory."""
-    ds_builder = tfds.builder('mnist')
-    ds_builder.download_and_prepare()
-    train_ds = tfds.as_numpy(ds_builder.as_dataset(split='train', batch_size=-1))
-    test_ds = tfds.as_numpy(ds_builder.as_dataset(split='test', batch_size=-1))
-    train_ds['image'] = jnp.float32(train_ds['image']) / 255.
-    test_ds['image'] = jnp.float32(test_ds['image']) / 255.
-    return train_ds, test_ds
+    train_ds = load_dataset('mnist', split='train')
+    train_ds.set_format(type='np')
+    batch_size = train_ds['image'].shape[0]
+    shape = (batch_size, IMAGE_H, IMAGE_W, IMAGE_C)
+    new_train_ds = {
+        'image': train_ds['image'].astype(np.float32).reshape(shape) / 255.,
+        'label': train_ds['label']
+    }
+    test_ds = load_dataset('mnist', split='test')
+    test_ds.set_format(type='np')
+    batch_size = test_ds['image'].shape[0]
+    shape = (batch_size, IMAGE_H, IMAGE_W, IMAGE_C)
+    new_test_ds = {
+        'image': test_ds['image'].astype(np.float32).reshape(shape) / 255.,
+        'label': test_ds['label']
+    }
+    return new_train_ds, new_test_ds
 
 
 def check_fp8(state, var_collect, input_shape, label_shape):
@@ -162,11 +157,9 @@ def check_fp8(state, var_collect, input_shape, label_shape):
 
 def train_and_evaluate(args):
     """Execute model training and evaluation loop."""
-    os.environ["XLA_PYTHON_CLIENT_PREALLOCATE"] = "false"
     print(args)
 
     if args.use_fp8:
-        assert gpu_has_fp8(), "GPU needs to support FP8."
         args.use_te = True
 
     train_ds, test_ds = get_datasets()
@@ -275,6 +268,8 @@ def mnist_parser(args):
 class TestMNIST(unittest.TestCase):
     """MNIST unittests"""
 
+    gpu_has_fp8, reason = te.fp8.is_fp8_available()
+
     @classmethod
     def setUpClass(cls):
         """Run MNIST without Transformer Engine"""
@@ -299,7 +294,7 @@ class TestMNIST(unittest.TestCase):
         actual = train_and_evaluate(self.args)
         self.verify(actual)
 
-    @unittest.skipIf(not gpu_has_fp8(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not gpu_has_fp8, reason)
     def test_te_fp8(self):
         """Test Transformer Engine with FP8"""
         self.args.use_fp8 = True

qa/L0_jax_unittest/test.sh

@@ -9,4 +9,5 @@ pytest -Wignore -v $TE_PATH/tests/jax
 
 pip install -r $TE_PATH/examples/jax/mnist/requirements.txt
 pip install -r $TE_PATH/examples/jax/encoder/requirements.txt
-pytest -Wignore -v $TE_PATH/examples/jax
+pytest -Wignore -v $TE_PATH/examples/jax --ignore=$TE_PATH/examples/jax/encoder/test_multiprocessing_encoder.py
+pytest -Wignore -v $TE_PATH/examples/jax/encoder/test_multiprocessing_encoder.py

tests/jax/test_custom_call_compute.py

@@ -13,13 +13,14 @@ from jax import lax
 from jax import jit, value_and_grad
 from flax import linen as nn
 
-from utils import assert_allclose, is_fp8_supported
+from utils import assert_allclose
 from transformer_engine.common.recipe import Format
 from transformer_engine.jax.cpp_extensions import dgated_gelu, gated_gelu
 from transformer_engine.jax.cpp_extensions import dgated_gelu_cast_transpose, gated_gelu_fp8
 from transformer_engine.jax.cpp_extensions import dequantize, quantize
 from transformer_engine.jax.dot import fp8_dot
 from transformer_engine.jax.fp8 import DType, FP8GemmPackage, FP8Helper, _format2dtypes
+from transformer_engine.jax.fp8 import is_fp8_available
 from transformer_engine.jax.layernorm import layernorm
 from transformer_engine.jax.mlp import fp8_ln_mlp
 
@@ -28,11 +29,12 @@ GEMM_CASES = [(256, 256, 512), (32, 32, 32), (16384, 1024, 2816), (16384, 2816,
 FP8_COMPUTE_TYPE = [_format2dtypes(Format.E4M3), _format2dtypes(Format.HYBRID)]
 LN_CASES = [(512, 1024)]
 DTYPES = [jnp.bfloat16, jnp.float32]
+is_fp8_supported, reason = is_fp8_available()
 
 
 class TestFP8Dot:
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     def test_qdq(self):
         FP8_E4M3_MAX = 448
         x = jnp.asarray([[-1, 0.1], [2, 3]], jnp.float32)
@@ -74,7 +76,7 @@ class TestFP8Dot:
         value_n_grad_func_compiled = jit(value_n_grad_func).lower(a, b).compile()
         value_n_grad_func_compiled(a, b)
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     @pytest.mark.parametrize('compute_type', FP8_COMPUTE_TYPE)
     def test_compile_fp8(self, compute_type):
         key = jax.random.PRNGKey(0)
@@ -115,7 +117,7 @@ class TestFP8Dot:
 
         assert_allclose(primitive_out, ref_out)
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     @pytest.mark.parametrize('m,n,k', GEMM_CASES)
     @pytest.mark.parametrize('compute_type', FP8_COMPUTE_TYPE)
     def test_forward_fp8_randint(self, m, n, k, compute_type):
@@ -180,7 +182,7 @@ class TestFP8Dot:
         assert_allclose(primitive_a_grad, ref_a_grad)
         assert_allclose(primitive_b_grad, ref_b_grad, atol=1e-5)
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     @pytest.mark.parametrize('m,n,k', GEMM_CASES)
     @pytest.mark.parametrize('compute_type', FP8_COMPUTE_TYPE)
     def test_grad_fp8_randint(self, m, n, k, compute_type):
@@ -252,7 +254,7 @@ class TestFP8Dot:
         assert_allclose(primitive_a_grad, ref_a_grad)
         assert_allclose(primitive_b_grad, ref_b_grad)
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     @pytest.mark.parametrize('m,n,k', [(256, 256, 512), (16384, 1024, 2816), (16384, 2816, 1024),
                                        (16384, 1024, 1024)])
     def test_grad_fp8_mlp_randint(self, m, n, k):
@@ -464,7 +466,7 @@ class TestGatedGeLuFP8(TestGatedGeLu):
 
         return func(inputs, no_use, no_use)
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     @pytest.mark.parametrize('shape', [(32, 64), (64, 256)])
     def test_gated_gelu(self, random_inputs):
         self.amax = jnp.zeros(1, jnp.float32)

tests/jax/test_helper.py

@@ -10,19 +10,21 @@ import jax.numpy as jnp
 import numpy as np
 from jax.experimental import maps
 
-from utils import assert_allclose, is_fp8_supported
+from utils import assert_allclose
 from transformer_engine.common.recipe import DelayedScaling
 from transformer_engine.common.recipe import Format as FP8Format
 from transformer_engine.jax import fp8_autocast, get_delayed_scaling
-from transformer_engine.jax.fp8 import FP8Helper
+from transformer_engine.jax.fp8 import FP8Helper, is_fp8_available
 from transformer_engine.jax.sharding import infer_major_sharding_type
 from transformer_engine.jax.sharding import MajorShardingType
 from transformer_engine.jax.sharding import ShardingResource
 
+is_fp8_supported, reason = is_fp8_available()
+
 
 class TestFP8Helper(unittest.TestCase):
 
-    @unittest.skipIf(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not is_fp8_supported, reason=reason)
     def test_initialize(self):
         margin = 5.0
         fp8_format = FP8Format.E4M3
@@ -52,7 +54,7 @@ class TestFP8Helper(unittest.TestCase):
 
         FP8Helper.finalize()
 
-    @unittest.skipIf(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not is_fp8_supported, reason=reason)
     def test_update_fp8_metas(self):
         FP8Helper.initialize(margin=3.0, amax_history_len=3)
 
@@ -113,7 +115,7 @@ class TestFP8Helper(unittest.TestCase):
 
         FP8Helper.finalize()
 
-    @unittest.skipIf(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not is_fp8_supported, reason=reason)
     def test_generate_fp8_max_array(self):
         num_of_meta = FP8Helper.NUM_META_PER_GEMM * 2
 
@@ -131,7 +133,7 @@ class TestFP8Helper(unittest.TestCase):
             assert_allclose(get_ref(fp8_format), FP8Helper.generate_fp8_max_array(num_of_meta))
             FP8Helper.finalize()
 
-    @unittest.skipIf(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not is_fp8_supported, reason=reason)
     def test_update_collections(self):
         original_val = 0.0
         updated_val = 10.0
@@ -163,7 +165,7 @@ class TestFP8Functions(unittest.TestCase):
         self.assertTrue(ref.amax_history_len == test.amax_history_len)
         self.assertTrue(ref.amax_compute_algo == test.amax_compute_algo)
 
-    @unittest.skipIf(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not is_fp8_supported, reason=reason)
     def test_fp8_autocast(self):
         FP8Helper.finalize()    # Ensure the testing not affect by previous tests.
         self._check_defult_state()
@@ -188,7 +190,7 @@ class TestFP8Functions(unittest.TestCase):
 
         self._check_defult_state()
 
-    @unittest.skipIf(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @unittest.skipIf(not is_fp8_supported, reason=reason)
     def test_fp8_autocast_with_sharding_resource(self):
         FP8Helper.finalize()    # Ensure the testing not affect by previous tests.
         self._check_defult_state()

tests/jax/test_layer.py

@@ -11,11 +11,13 @@ import pytest
 
 from transformer_engine.common.recipe import Format
 from transformer_engine.jax.flax import TransformerLayer, TransformerLayerType
-from transformer_engine.jax.fp8 import FP8Helper
-from utils import assert_allclose, is_fp8_supported
+from transformer_engine.jax.fp8 import FP8Helper, is_fp8_available
+from utils import assert_allclose
 from utils import DecoderLayer as RefDecoderLayer
 from utils import EncoderLayer as RefEncoderLayer
 
+is_fp8_supported, reason = is_fp8_available()
+
 
 def loss_fn(diff_xs, no_diff_xs, params, others, model, rngs):
     output = model.apply({"params": params, **others}, *diff_xs, *no_diff_xs, rngs=rngs)
@@ -289,7 +291,7 @@ class TestEncoderLayer:
         FP8Helper.finalize()    # Ensure FP8 disabled.
         self.forward_runner(data_shape, dtype, attrs, rtol=1e-05, atol=2e-04)
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     @pytest.mark.parametrize('data_shape', DATA_SHAPE)
     @pytest.mark.parametrize('dtype', DTYPE)
     @pytest.mark.parametrize('fp8_format', FP8_FORMATS)
@@ -306,7 +308,7 @@ class TestEncoderLayer:
         FP8Helper.finalize()    # Ensure FP8 disabled.
         self.forward_backward_runner(data_shape, dtype, attrs, rtol=1e-05, atol=2e-04)
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     @pytest.mark.parametrize('data_shape', DATA_SHAPE)
     @pytest.mark.parametrize('dtype', DTYPE)
     @pytest.mark.parametrize('fp8_format', FP8_FORMATS)
@@ -516,7 +518,7 @@ class TestDecoderLayer:
         FP8Helper.finalize()    # Ensure FP8 disabled.
         self.forward_runner(data_shape, dtype, attrs, rtol=1e-05, atol=2e-04)
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     @pytest.mark.parametrize('data_shape', DATA_SHAPE)
     @pytest.mark.parametrize('dtype', DTYPE)
     @pytest.mark.parametrize('fp8_format', FP8_FORMATS)
@@ -533,7 +535,7 @@ class TestDecoderLayer:
         FP8Helper.finalize()    # Ensure FP8 disabled.
         self.forward_backward_runner(data_shape, dtype, attrs, rtol=1e-05, atol=2e-04)
 
-    @pytest.mark.skipif(not is_fp8_supported(), reason='GPU capability is not enough to run FP8')
+    @pytest.mark.skipif(not is_fp8_supported, reason=reason)
     @pytest.mark.parametrize('data_shape', DATA_SHAPE)
     @pytest.mark.parametrize('dtype', DTYPE)
     @pytest.mark.parametrize('fp8_format', FP8_FORMATS)

tests/jax/test_sharding.py

@@ -7,6 +7,7 @@ import numpy as np
 import pytest
 from jax.experimental import maps
 
+from utils import is_devices_enough
 from transformer_engine.jax.flax import extend_logical_axis_rules
 from transformer_engine.jax.sharding import get_dot_sharding_meta
 from transformer_engine.jax.sharding import get_elementwise_sharding_meta
@@ -15,7 +16,6 @@ from transformer_engine.jax.sharding import global_shard_guard
 from transformer_engine.jax.sharding import infer_major_sharding_type
 from transformer_engine.jax.sharding import is_dp_enabled, is_tp_enabled
 from transformer_engine.jax.sharding import ShardingMeta, ShardingResource, ShardingType
-from utils import is_devices_enough
 
 
 def _get_sharding_resource(mesh_names, sharding_type):

tests/jax/utils.py

@@ -9,7 +9,6 @@ from typing import Any, Callable, Tuple, Sequence, Union, Iterable, Optional
 import jax
 import jax.numpy as jnp
 import numpy as np
-from cuda import cudart
 from flax import linen as nn
 from flax.linen import partitioning as nn_partitioning
 from jax import lax, vmap
@@ -25,20 +24,6 @@ PrecisionLike = Union[None, str, lax.Precision, Tuple[str, str], Tuple[lax.Preci
 Initializer = Callable[[PRNGKey, Shape, DType], Array]
 
 
-def is_fp8_supported():
-    """
-    Thus JAX doesn't have API to query capability
-    Use cuda-python for get the compute capability
-    """
-    cudaSuccess = cudart.cudaError_t.cudaSuccess
-    ret, gpu_id = cudart.cudaGetDevice()
-    assert ret == cudaSuccess
-    flag = cudart.cudaDeviceAttr.cudaDevAttrComputeCapabilityMajor
-    ret, sm_major = cudart.cudaDeviceGetAttribute(flag, gpu_id)
-    assert ret == cudaSuccess
-    return sm_major >= 9
-
-
 def is_devices_enough(required):
     return len(jax.devices()) >= required
 

transformer_engine/jax/CMakeLists.txt

@@ -6,6 +6,7 @@ pybind11_add_module(
     transformer_engine_jax
     ${CMAKE_CURRENT_SOURCE_DIR}/csrc/extensions.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/csrc/modules.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/csrc/utils.cpp
 )
 
 target_link_libraries(transformer_engine_jax PRIVATE CUDA::cudart CUDA::cublas CUDA::cublasLt transformer_engine)

transformer_engine/jax/csrc/extensions.cpp

@@ -6,6 +6,8 @@
 #include <pybind11/pybind11.h>
 #include <pybind11/stl.h>
 
+#include <cublasLt.h>
+
 #include "common/include/transformer_engine/fused_attn.h"
 #include "common/include/transformer_engine/transformer_engine.h"
 #include "jax/csrc/modules.h"
@@ -58,6 +60,9 @@ PYBIND11_MODULE(transformer_engine_jax, m) {
     m.def("pack_gemm_descriptor", &PackCustomCallGemmDescriptor);
     m.def("pack_norm_descriptor", &PackCustomCallNormDescriptor);
     m.def("pack_softmax_descriptor", &PackCustomCallSoftmaxDescriptor);
+    m.def("get_cublasLt_version", &cublasLtGetVersion);
+    m.def("get_cuda_version", &GetCudaRuntimeVersion);
+    m.def("get_device_compute_capability", &GetDeviceComputeCapability);
     m.def("pack_fused_attn_descriptor", &PackCustomCallFusedAttnDescriptor);
     m.def("is_fused_attn_kernel_available", &IsFusedAttnKernelAvailable);
 

transformer_engine/jax/csrc/utils.cpp

+/*************************************************************************
+ * Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ *
+ * See LICENSE for license information.
+ ************************************************************************/
+#include <cuda_runtime_api.h>
+#include <cassert>
+
+#include "utils.h"
+
+namespace transformer_engine {
+namespace jax {
+
+int GetCudaRuntimeVersion() {
+    int ver = 0;
+    NVTE_CHECK_CUDA(cudaRuntimeGetVersion(&ver));
+    return ver;
+}
+
+int GetDeviceComputeCapability(int gpu_id) {
+    int max_num_gpu = 0;
+    NVTE_CHECK_CUDA(cudaGetDeviceCount(&max_num_gpu));
+    assert(gpu_id < max_num_gpu);
+
+    int major = 0;
+    NVTE_CHECK_CUDA(cudaDeviceGetAttribute(&major, cudaDevAttrComputeCapabilityMajor, gpu_id));
+
+    int minor = 0;
+    NVTE_CHECK_CUDA(cudaDeviceGetAttribute(&minor, cudaDevAttrComputeCapabilityMinor, gpu_id));
+
+    int gpu_arch = major * 10 + minor;
+    return gpu_arch;
+}
+
+}  // namespace jax
+}  // namespace transformer_engine

transformer_engine/jax/csrc/utils.h

@@ -18,6 +18,9 @@
 namespace transformer_engine {
 namespace jax {
 
+int GetCudaRuntimeVersion();
+int GetDeviceComputeCapability(int gpu_id);
+
 class cublasLtMetaManager {
  public:
     static cublasLtMetaManager &Instance() {

transformer_engine/jax/fp8.py

@@ -13,13 +13,50 @@ import jax.numpy as jnp
 from flax.core.frozen_dict import FrozenDict
 
 from transformer_engine_jax import DType
+from transformer_engine_jax import get_cublasLt_version
+from transformer_engine_jax import get_cuda_version, get_device_compute_capability
 from transformer_engine.common.recipe import DelayedScaling, Format
 from transformer_engine.jax.sharding import global_shard_guard
 from transformer_engine.jax.sharding import ShardingResource
 
+_is_fp8_available = None
+_reason_for_no_fp8 = ""
 Collection = Union[Dict, FrozenDict]
 
 
+def _check_fp8_support(gpu_id) -> Tuple[bool, str]:
+    """Return if fp8 support is available"""
+    gpu_arch = get_device_compute_capability(gpu_id)
+    if gpu_arch >= 90:    # hopper and above
+        return True, ""
+    if gpu_arch < 89:    # pre-ada
+        return False, "Device compute capability 8.9 or higher required for FP8 execution."
+    if get_cublasLt_version() < 120103:
+        return False, "CublasLt version 12.1.3.x or higher required for FP8 execution on Ada."
+    if get_cuda_version() < 12010:
+        return False, "Cuda version 12.1 or higher required for FP8 execution on Ada."
+    return True, ""
+
+
+def is_fp8_available(gpu_id=None) -> Tuple[bool, str]:
+    """Return if fp8 support is available"""
+    if gpu_id is not None:
+        return _check_fp8_support(gpu_id)
+
+    global _is_fp8_available, _reason_for_no_fp8
+    if _is_fp8_available is None:
+        _is_fp8_available = True
+        devices = jax.local_devices()
+        for gpu in devices:
+            ret, msg = _check_fp8_support(gpu.id)
+            if ret is False:
+                _is_fp8_available = ret
+                _reason_for_no_fp8 = msg
+            break
+
+    return _is_fp8_available, _reason_for_no_fp8
+
+
 def _format2dtypes(format_: Format):
     if format_ == Format.E4M3:
         return DType.kFloat8E4M3, DType.kFloat8E4M3
@@ -332,6 +369,9 @@ def fp8_autocast(enabled: bool = False,
     try:
         with global_shard_guard(sharding_resource):
             if enabled:
+                fp8_available, reason_for_no_fp8 = is_fp8_available()
+                assert fp8_available, reason_for_no_fp8
+
                 amax_compute_algo = AmaxComputeAlgo.MOST_RECENT
                 if fp8_recipe.amax_compute_algo == 'max':
                     amax_compute_algo = AmaxComputeAlgo.MAX