perf-overview.md

(perf-overview)=

Important

As of TensorRT-LLM v0.10, these performance benchmarks have changed methodology to utilize in-flight batching and no longer utilize static benchmarking. These numbers are initial measurements and are expected to improve in future releases.

Overview

This document summarizes performance measurements of TensorRT-LLM on H100 (Hopper), L40S (Ada) and A100 (Ampere) GPUs for a few key models.

The data in the following tables is provided as a reference point to help users validate observed performance. It should not be considered as the peak performance that can be delivered by TensorRT-LLM.

Known Issues

The following issues are being addressed to improve the efficiency of TensorRT-LLM.

Fused Matmul + Gated-SiLU (LLaMA)

The current implementation combines two Matmul operations into one Matmul followed by a separate SwiGLU kernel (when --use_fused_mlp is enabled). There is also a more efficient implementation that runs single Matmul + SwiGLU fused kernel for FP8 on Hopper (when --use_fused_mlp --gemm_swiglu_plugin fp8 is enabled). The gemm_swiglu_plugin will support more data types and GPU architectures in the future release.

Throughput Measurements

The below table shows performance data where a local inference client is fed requests at an infinite rate (no delay between messages), and shows the throughput client-server scenario under maximum load.

The performance numbers below were collected using the steps described in this document.

All data in the table below was generated using version 0.10.0 and presents token throughput in tokens/second.

		GPU	H200 141GB HBM3	H100 80GB HBM3	H100 80GB HBM3	A100-SXM4-80GB	L40S	L40S
		Precision	FP8	FP8	FP16	FP16	FP8	FP16
Model	Input/Output Lengths	TP
GPTJ 6B	128/128	1	40633.96	34955.29	11206.68	5966.69	6997.91	3448.53
	2048/128	1	2937.91	2800.37	1354.56	682.27	747.43	352.4
	128/2048	1	9039.72	54939.48	3896.8	2225.09	2041.52	896.04
	2048/2048	1	5437.97	3663.26	1498.04	882.61
LLaMA v2 7B	128/128	1	18229.3	16985.6	10725.31	5303.5	6121.1	3139.62
	2048/128	1	2496.92	2355.47	1235.4	585.6	642.24	311.82
	128/2048	1	7612.25	6679.36	3399.43	1903.4	1749.4
	2048/2048	1	3259.74	2805.32	1335.51
LLaMA v3 8B	128/128	1	16708.84	16708.53	12085.78	5853.96	8273.8	5207.01
	2048/128	1	2478.94	2427.09	1604.7	737.81	1021.64	622.15
	128/2048	1	8367.88	8013.55	6208.23	3385.71	4568.17	2134.72
	2048/2048	1	3674.33	3500.48	2776.31	1514.04	1546.84	899.2
Mixtral 8x7B	128/128	2	16959.49	16051.88	12376.52	5120.41
		4						5271.48
	2048/128	2	2423.99	2276.6	1717.37	636.5
		4						654.36
	128/2048	2	12944.52	11997.24	7864.88	3946.92
		4						4650.16
	2048/2048	2	6208.97	5498.33	3722.56	1834.36
		4						2262.57
LLaMA v2 70B	128/128	1	4055.97	2134.52
		2	6299.21	6035.36		963.14	980.31
		4	8758.45	8148.67	5454.76	2394.12	1450.61	838.03
		8	10261.44	9385.26	7491.94	3683.42	1387.91	1204.32
	2048/128	1	493.87	222.16
		2	784.47	757.55		114.9	111.24
		4	1164.15	1083.25	695.33	292.77	171.68	102.49
		8	1441.26	1346.9	1016.58	456.46	163.76	145.41
	128/2048	1	3199.9	635.32
		2	6747	4710.45
		4	10960.72	8485.56	3686.63	2047.67	1368.09
		8	17250.73	12333.24	7927.16	4166.36	1667.57	1186.38
	2048/2048	1	1734.58
		2	3455.34	2267.45
		4	6141.39	4019.31	1814.78	1046
		8	9271.77	7061.32	3658.42	2210.84	771.23	614.74
LLaMA v3 70B	128/128	1	3988.96
		2	6155.26	5835.57
		4	8454.74	7945.64	5210.19	2405.44	1280.9
		8	9893.18	9308.51	7126.51	3621.25	1367.56	1164.88
	2048/128	1	491.79
		2	783.26	751.14
		4	1154.66	1074.31	691.99	295.87	171.16
		8	1434.86	1337.36	1010.5	455.18	165.06	143.92
	128/2048	1	3015.16
		2	6758.32	4130.4
		4	10532.1	7730.54	3246.34	1974.04	1232.53
		8	16467.79	11680.94	7205.34	4091.45	1514.93	1034.07
	2048/2048	1	1654.25
		2	3271.6	1976.76
		4	6113.93	3685.74	1612.11	992.74
		8	8986.3	6443.85	3523.17	2118.89	691.62
Falcon 180B	128/128	4	3810.55	3698.71
		8	5946.89	5608.59	3954.58	1754.14	1243.33
	2048/128	4	525.6	510.85
		8	848.4	813.95	535.41	221.39	145.35
	128/2048	4	2883.67	2495.62
		8	5388.34	4796.47	3051.89	1684.6	1359.42
	2048/2048	4	1376.61	952.25
		8	2495.66	2421.77	896.28		609.65

TP stands for Tensor Parallelism

Reproducing Benchmarked Results

Building the TensorRT-LLM Container

---

In order to benchmark TensorRT-LLM, you will need to follow the Quick Start build process to create a baseline container for building a wheel. Additionally, the development container needs a copy of the source code to build the wheel and the benchmarking script. Create the right build environment, use the following :

git clone https://github.com/NVIDIA/TensorRT-LLM.git
cd TensorRT-LLM
git submodule update --init --recursive
git lfs install
git lfs pull
make -C docker build
make -C docker run LOCAL_USER=1

Warning

If you have elevated privileges on your system, then skip the make -C docker run LOCAL_USER=1 command above as it may make it so that you cannot access some required system libraries within the container because the build forces your UID and GID to match those that are set for your non-elevated user. There are cases where the container will be booted as root (i.e. on some SLURM systems with the pyxis plugin) which will cause libraries to be missing.

If you are benchmarking in a shared environment, you need to specify the GPU indices that you would like the container to use, otherwise the Makefile defaults to loading the container with all GPUs on the system. For example, if you only have the 4 higher indices of GPUs on your system you can configure it using the following example:

NV_GPU=0,1,2,3
make -C docker run LOCAL_USER=1 GPU_OPTS='--gpus \"device=${NV_GPU}\"'

Additionally, if you'd like to mount external storage to access persistent storage, or previously built engines, you can mount directories as follows (simply replace source and destination with the appropriate paths):

make -C docker run LOCAL_USER=1 DOCKER_RUN_ARGS="-v /source:/destination"

Once the container starts, you'll need to build the wheel and the benchmarking scripts. From the code root (the default directory when the container is loaded), the following commands will build the TensorRT-LLM wheel, install dependencies, and build the benchmark scripts:

python3 ./scripts/build_wheel.py --benchmarks --trt_root /usr/local/tensorrt
pip install ./build/tensorrt_llm*.whl

Methodology

The following tables are references for commands that are used as part of the benchmarking process.

Commands

Stage	Description	Command
Build	Build a TensorRT-LLM engine	trtllm-build --model_config $model_cfg --strongly_typed --output_dir $engine_dir --max_batch_size 2048 --max_input_len 2048 --max_seq_len 6144 --workers $tp_size --max_num_tokens 2048 --use_paged_context_fmha enable --multiple_profiles enable
Dataset	Create a synthetic dataset	benchmarks/cpp/prepare_dataset.py --output=$dataset_file --tokenizer=$model_name token-norm-dist --num-requests=2000 --input-mean=$isl --output-mean=$osl --input-stdev=0 --output-stdev=0
Run	Run a benchmark with a dataset	mpirun -n $tp_size --allow-run-as-root --oversubscribe cpp/build/benchmarks/gptManagerBenchmark --engine_dir $engine_dir --type IFB --dataset $dataset_file --scheduler_policy max_utilization --kv_cache_free_gpu_mem_fraction 0.9 --output_csv $results_csv --request_rate -1.0 --enable_chunked_context --streaming --warm_up 0

Variables

Name	Description
$isl	Benchmark input sequence length.
$osl	Benchmark output sequence length.
$tp_size	Number of GPUs to run the benchmark with
$engine_dir	Location to store built engine file (can be deleted after running benchmarks).
$model_cfg	Name of the model configuration JSON file to use for building.
$model_name	HuggingFace model name eg. meta-llama/Llama-2-7b-hf or use the path to a local weights directory
$dataset_file	Location of the dataset file generated by prepare_dataset.py
$results_csv	Path to store end results to.

Engine Building

All benchmarks were run using a single engine with a configuration that is capable of handling the maximum sequence lengths encountered during benchmarking. For each benchmark, regardless of input/output sequence length, you can reuse the single engine to run all tests. Each engine will be built with a paged KV cache and in-flight batching enabled. For more information see the documentation about in-flight batching.

In order to build an engine you will need to run the following command by specifying a configuration file for the model that you would like to build (see below). The general build command is as follows:

trtllm-build --model_config $model_cfg --strongly_typed --output_dir $engine_dir --max_batch_size 2048 --max_input_len 2048 --max_seq_len 6144 --workers $tp_size --max_num_tokens 2048 --use_paged_context_fmha enable --multiple_profiles enable

Some notes about the command:

• --workers affects the number of threads that build the engine file and does not necessarily need to match the TP size. Make sure to set the tensor parallelism in the $model_cfg JSON file. See below
• You can run benchmarks for datasets that fit within the bounds of the max_input_len and max_seq_len parameters.

Engine Configuration Files

In order to configure the TensorRT-LLM build process for benchmarking, you need to provide trtllm-build a configuration file that specifies the following the network configuration, parallelism mapping, and quantization options.

Below we document how to benchmark each model on an H100-HBM3-80GB system and reproduce the throughput numbers we document on our [Performance section](#performance of-tensorrt-llm).

Important

In order to change the parallelism for a build, you need to modify the mapping dictionary in your configuration file. The settings must conform to the following condition: world_size == tp_size * pp_size.

Note

All configurations below are set to run utilizing FP8 by default. If you would like to run on an A100 system, see our notes about disabling FP8 quantization.

Network Configuration Files

Each network has its own configuration file. All networks are configured to run using FP8 quantization by default.

Model	Configuration File (FP8)
EleutherAI/gpt-j-6b	{ "architecture": "GPTJForCausalLM", "dtype": "float16", "num_hidden_layers": 28, "num_attention_heads": 16, "hidden_size": 4096, "norm_epsilon": 1e-05, "vocab_size": 50400, "position_embedding_type": "rope_gptj", "max_position_embeddings": 2048, "hidden_act": "gelu_new", "quantization": { "quant_algo": "FP8", "kv_cache_quant_algo": "FP8" }, "rotary_dim": 64, "kv_dtype": "float16" }
tiiuae/falcon-180B	{ "architecture": "FalconForCausalLM", "dtype": "bfloat16", "num_hidden_layers": 80, "num_attention_heads": 232, "num_key_value_heads": 8, "hidden_size": 14848, "norm_epsilon": 1e-05, "vocab_size": 65024, "position_embedding_type": "rope_gpt_neox", "max_position_embeddings": 2048, "hidden_act": "gelu", "use_parallel_embedding": false, "embedding_sharding_dim": 0, "share_embedding_table": false, "quantization": { "quant_algo": "FP8", "kv_cache_quant_algo": "FP8" }, "mapping": { "world_size": 8, "tp_size": 8, "pp_size": 1 }, "bias": false, "parallel_attention": true, "new_decoder_architecture": true, "kv_dtype": "float16" }
meta-llama/Llama-2-7b-hf	{ "architecture": "LlamaForCausalLM", "dtype": "float16", "num_hidden_layers": 32, "num_attention_heads": 32, "hidden_size": 4096, "intermediate_size": 11008, "num_key_value_heads": 32, "vocab_size": 32000, "position_embedding_type": "rope_gpt_neox", "max_position_embeddings": 4096, "hidden_act": "silu", "rotary_base": 10000.0, "rotary_scaling": null, "norm_epsilon": 1e-05, "quantization": { "quant_algo": "FP8", "kv_cache_quant_algo": "FP8" }, "kv_dtype": "float16" }
meta-llama/Llama-2-70b-hf	{ "architecture": "LlamaForCausalLM", "dtype": "float16", "num_hidden_layers": 80, "num_attention_heads": 64, "hidden_size": 8192, "intermediate_size": 28672, "num_key_value_heads": 8, "vocab_size": 32000, "position_embedding_type": "rope_gpt_neox", "max_position_embeddings": 4096, "hidden_act": "silu", "rotary_base": 10000.0, "rotary_scaling": null, "norm_epsilon": 1e-05, "quantization": { "quant_algo": "FP8", "kv_cache_quant_algo": "FP8" }, "mapping": { "world_size": 4, "tp_size": 4, "pp_size": 1 }, "kv_dtype": "float16" }
meta-llama/Meta-Llama-3-8B	{ "architecture": "LlamaForCausalLM", "num_hidden_layers": 32, "num_attention_heads": 32, "num_key_value_heads": 8, "hidden_size": 4096, "vocab_size": 128256, "max_position_embeddings": 8192, "hidden_act": "silu", "norm_epsilon": 1e-05, "dtype": "float16", "position_embedding_type": "rope_gpt_neox", "intermediate_size": 28672, "rotary_base": 500000.0, "rope_theta": 500000.0, "rotary_scaling": null, "mapping": { "world_size": 1, "tp_size": 1, "pp_size": 1 }, "quantization": { "quant_algo": "FP8", "kv_cache_quant_algo": "FP8" }, "kv_dtype": "float16" }
meta-llama/Meta-Llama-3-70B	{ "architecture": "LlamaForCausalLM", "num_hidden_layers": 80, "num_attention_heads": 64, "num_key_value_heads": 8, "hidden_size": 8192, "vocab_size": 128256, "max_position_embeddings": 8192, "hidden_act": "silu", "dtype": "float16", "norm_epsilon": 1e-05, "position_embedding_type": "rope_gpt_neox", "intermediate_size": 14336, "rotary_base": 500000.0, "rope_theta": 500000.0, "rotary_scaling": null, "mapping": { "world_size": 4, "tp_size": 4, "pp_size": 1 }, "quantization": { "quant_algo": "FP8", "kv_cache_quant_algo": "FP8" }, "kv_dtype": "float16" }
mistralai/Mixtral-8x7B-v0.1	{ "architecture": "MixtralForCausalLM", "num_hidden_layers": 32, "num_attention_heads": 32, "num_key_value_heads": 8, "hidden_size": 4096, "norm_epsilon": 1e-05, "vocab_size": 32000, "max_position_embeddings": 32768, "head_size": 128, "hidden_act": "swiglu", "dtype": "float16", "position_embedding_type": "rope_gpt_neox", "intermediate_size": 14336, "moe_num_experts": 8, "moe_top_k": 2, "rotary_base": 1000000.0, "rope_theta": 1000000.0, "mapping": { "world_size": 1, "tp_size": 1, "pp_size": 1 }, "quantization": { "quant_algo": "FP8", "kv_cache_quant_algo": "FP8" }, "kv_dtype": "float16" }

Running on A100

To run the benchmarks on A100, you will need to undefine or remove the following quantization fields from each config json file, because FP8 computation is a feature in H100 and newer GPUs.

"quantization": {
	"quant_algo": null,
	"kv_cache_quant_algo": null,
}

Preparing a Dataset

In order to prepare a dataset, you can use the provided script. To generate a synthetic dataset, run the following command:

benchmarks/cpp/prepare_dataset.py --output=$dataset_file --tokenizer=$model_name token-norm-dist --num-requests=2000 --input-mean=$isl --output-mean=$osl --input-stdev=0 --output-stdev=0

The command will generate a JSON file located at the path specified $dataset_file where all requests are of the same input/output sequence length combinations. The script works by using the tokenizer to retrieve the vocabulary size and randomly sample token IDs from it to create entirely random sequences. In the command above, all requests will be uniform because the standard deviations for both input and output sequences are set to 0.

Running the Benchmark

To run the benchmark with the generated data set, simply run the following command from the root of the TensorRT-LLM repository. See the variables section for reference on variable values.

mpirun -n $tp_size --allow-run-as-root --oversubscribe cpp/build/benchmarks/gptManagerBenchmark --engine_dir $engine_dir --type IFB --dataset $dataset_file --scheduler_policy max_utilization --kv_cache_free_gpu_mem_fraction 0.9 --output_csv $results_csv --request_rate -1.0 --enable_chunked_context --streaming --warm_up 0

The command will run the gptManagerBenchmark binary that will report the throughput and other metrics as part of its output that can be compared with the table in the Performance section of this README.