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TILEARN for LLM

Project description

Angel Tilearn.llm使用说明

当前版本完全兼容huggingface接口,支持计算优化、TP/PP/EP混合并行优化,不需要额外的模型转换操作

Dependencies: pytorch >= 2.0.0

支持显卡:Ampere, Ada, or Hopper GPUs (e.g., A100, A800, H100, H800, H20)

一、Transformers大语言模型

1.1 计算优化

当前版本完全兼容huggingface接口,只需要2行代码即可开启计算优化

1.1.1 Monkey-Patch使用方法

### TILEARN.LLM monkey patch
from tilearn.llm.transformers.models import patch_models
patch_models()

### 通过Auto factory初始化模型,接口与标准huggingface一致
model = AutoModelForCausalLM.from_pretrained(...)
### or直接初始化模型
model = LlamaForCausalLM.from_pretrained(...)

目前Monkey-Patch支持的模型列表:

LlamaForCausalLM
Qwen2ForCausalLM

1.1.2 直接调用tilearn api方法

### TILEARN.LLM
from tilearn.llm.transformers import LlamaForCausalLM

### 模型接口与标准huggingface一致
model = LlamaForCausalLM.from_pretrained(...)

或者使用AutoModelForCausalLM接口

### TILEARN.LLM
from tilearn.llm.transformers import AutoModelForCausalLM

### 模型接口与标准huggingface一致
model = AutoModelForCausalLM.from_pretrained(...)

特殊说明:

  • 由于baichuan1 13B和baichuan2 13B会产生冲突,目前tilearn.llm.transformers.AutoModelForCausalLM默认开启了baichuan1 13B,如果需要使用baichuan2 13B,需要在启动训练脚本中设置环境变量:export TILEARN_LLM_BAICHUAN_13B=2
### TILEARN_LLM_BAICHUAN_13B open baichuan2 model
export TILEARN_LLM_BAICHUAN_13B=2
  • 目前加速已经支持的模型列表:
# llama
from tilearn.llm.transformers.models.llama.modeling_llama import LlamaForCausalLM

# bloom
from tilearn.llm.transformers.models.bloom.modeling_bloom import BloomForCausalLM

# baichuan1
from tilearn.llm.transformers.models.baichuan.baichuan1_13B.modeling_baichuan import BaichuanForCausalLM
from tilearn.llm.transformers.models.baichuan.baichuan1_7B.modeling_baichuan import BaiChuanForCausalLM

# baichuan2
# 默认使用TILEARN.LLM且无需任何设置
# 单独使用xformer,需安装xformer且设置环境变量TIACC_TRAINING_CUDA_KERNEL=2
from tilearn.llm.transformers.models.baichuan.baichuan2_7B.modeling_baichuan import BaichuanForCausalLM
from tilearn.llm.transformers.models.baichuan.baichuan2_13B.modeling_baichuan import BaichuanForCausalLM

# aquila2
from tilearn.llm.transformers.models.aquila.aquila2.modeling_aquila import AquilaForCausalLM

1.2 混合并行

当前版本完全兼容huggingface trainer生态,只需要2行代码即可开启TP、PP、EP混合并行。无需进行模型转换

1.2.1 启动脚本配置参数

示例1(Llama/Qwen等非MoE结构)

### 混合并行
export TILEARN_DEBUG=1
export TILEARN_HYBRID_TP_SIZE=2
export TILEARN_HYBRID_PP_SIZE=2
#export TILEARN_HYBRID_OFFLOAD=0
#export TILEARN_HYBRID_ZERO_STAGE=1

示例2(MixtralMoE)

### 混合并行
export TILEARN_DEBUG=1
export TILEARN_HYBRID_MODE='MixtralMoe'
export TILEARN_HYBRID_TP_SIZE=1
export TILEARN_HYBRID_PP_SIZE=2
export TILEARN_HYBRID_EP_SIZE=2
export TILEARN_HYBRID_OFFLOAD=0
export TILEARN_HYBRID_ZERO_STAGE=1

示例3(HunYuanMoE)

### 混合并行
export TILEARN_DEBUG=1
export TILEARN_HYBRID_MODE='HunyuanMoe'
export TILEARN_HYBRID_TP_SIZE=1
export TILEARN_HYBRID_PP_SIZE=4
export TILEARN_HYBRID_EP_SIZE=2  # 专家并行
export TILEARN_HYBRID_OFFLOAD=0
export TILEARN_HYBRID_ZERO_STAGE=1

1.2.2 训练代码导入 tilearn 包

import tilearn.llm.hybrid_parallel

示例

### (可选)开启混合并行
import tilearn.llm.hybrid_parallel
### (可选)导入计算优化
from tilearn.llm.transformers.models import patch_models
### (可选)cpu 内存优化
# from tilearn.llm.memory.cpu.memory_optimize import memory_optimize

def main():
    ### (可选)导入计算优化
    patch_models()
    
    ### (可选)cpu 内存优化
    # memory_optimize()
    
    run_exp()

if __name__ == "__main__":
    main()

1.2.3 混合并行加速效果

Qwen2.5 32B GPU num mbs global bs seqlength GPU Mem tokens / sec / gpu
deepspeed zero3 g-ckpt 16 1 64 4096 86 GB 427
tilearn.llm TP4 PP2 zero1 16 1 64 4096 76 GB 515

其他数据见1.5节

1.3 AutoZero offload

适用于显存有限,zero3+offload场景显存优化

### AutoZero
export TILEARN_DEBUG=1
export TILEARN_HYBRID_MODE='AutoZero'
export TILEARN_HYBRID_AUTOZERO_SHARD_PARAM=1
export TILEARN_HYBRID_AUTOZERO_OFFLOAD_OPTIM=1
export TILEARN_HYBRID_AUTOZERO_OFFLOAD_PARAM=1
Qwen2 72B GPU num mbs global bs seqlength GPU Mem tokens / sec / gpu
deepspeed zero3 offload 8 1 16 4096 42 GB 136
tilearn.llm autozero offload 8 1 16 4096 22 GB 135

1.4 torch compile - experiment

适用场景:huggingface transformers + trainer模型

自动编译优化,在main.py添加如下代码即可开启,目前还在实验阶段

import tilearn.llm.compile

目前已支持手工CUDA算子+自动编译优化,若要关闭手工CUDA算子,则添加以下环境变量

export TILEARN_COMPILE_MODELPATCH=0

1.5 Transformers模型加速效果

TILEARN-LLM大模型训练加速指标

二、自动驾驶场景模型

2.1 cpu亲和性优化

适用范围单机8卡、多机多卡。用法上相对通用与具体模型无关,但加速收益和模型相关

from tilearn.llm.cpu_affinity import cpu_affinity

def main():
    cpu_affinity()
    
main()

某自动驾驶场景模型加速效果

Method GPU num mbs sec / step speedup
baseline 48 2 2.55 1
tilearn.llm 48 2 1.91 1.34

2.2 gc优化

适用范围单机8卡、多机多卡。用法上相对通用与具体模型无关,但加速收益和模型相关

from tilearn.llm.gc_optimize import gc_optimize

def main():
    gc_optimize()
    
main()

某自动驾驶场景模型加速效果

Method GPU num mbs sec / step speedup
baseline 32 64 1.74 1
tilearn.llm 32 64 1.13 1.54

附录 - 通用训练加速功能介绍

训练加速中的通信加速能力通过兼容原生的DDP工具提供,用户无需修改原生的使用代码可直接进行使用,数据IO优化、自适应FP16都通过封装好的简单函数/类进行提供,用户仅需增加几行代码便可使用。

1.使用DDP分布式训练通信优化(PyTorch+多机多卡DPP)

适用范围:多机多卡 以兼容原生DDP的方式启动训练脚本,无需进行训练代码的修改,启动命令参考示例如下: 在启动脚本start.sh内使用tiaccrun替换torchrun,接口与pytorch torchrun完全一致

export NODE_NUM=1
export INDEX=0
export GPU_NUM_PER_NODE=1
export MASTER_ADDR=127.0.0.1
export MASTER_PORT=23458

tiaccrun \
    --nnodes $NODE_NUM \
    --node_rank $INDEX \
    --nproc_per_node $GPU_NUM_PER_NODE \
    --master_addr $MASTER_ADDR \
    --master_port $MASTER_PORT \
    xxx.py

tilearnrun \
    --nnodes $NODE_NUM \
    --node_rank $INDEX \
    --nproc_per_node $GPU_NUM_PER_NODE \
    --master_addr $MASTER_ADDR \
    --master_port $MASTER_PORT \
    xxx.py

DDP分布式训练通信优化实测效果: (加速效果在多机多卡场景方有体现,单机多卡场景与原生DDP性能无异。)

硬件环境 模型 GPU卡数 原生DDP(examples/sec per V100) TI-ACC通信优化(examples/sec per V100)
腾讯云GN10Xp.20XLARGE320 resnext50_32x4d 1(单机) 227 227
腾讯云GN10Xp.20XLARGE320 resnext50_32x4d 8(单机) 215 215
腾讯云GN10Xp.20XLARGE320 resnext50_32x4d 16(双机) 116 158.6

2.使用TIACC优化器(PyTorch)

适用范围:单机单卡、单机多卡、多级多卡

import torch

from tilearn.llm.torch.optimizers import FusedSGD
from tilearn.llm.torch.optimizers import FusedAdam
from tilearn.llm.torch.optimizers import FusedLAMB
from tilearn.llm.torch.optimizers import FusedAdagrad

nelem = 1
tensor = torch.rand(nelem, dtype=torch.float, device="cuda")

param = []
param.append(torch.nn.Parameter(tensor.clone()))

sgd_options = {"lr": .25, "momentum": .125}

optimizer =FusedSGD(param, **sgd_options)
optimizer =FusedAdam(param)
optimizer =FusedLAMB(param)
optimizer =FusedAdagrad(param)

FusedSGD接口

class FusedSGD(Optimizer):
    def __init__(self, params, lr=required, momentum=0, 
                 dampening=0, weight_decay=0, nesterov=False)

FusedAdam接口

class FusedAdam(Optimizer):
    def __init__(self, params, lr=1e-3, bias_correction=True,
                 betas=(0.9, 0.999), eps=1e-8, adam_w_mode=True,
                 weight_decay=0., amsgrad=False)

FusedLAMB接口

class FusedLAMB(Optimizer):
    def __init__(self, params, lr=1e-3, bias_correction=True,
                 betas=(0.9, 0.999), eps=1e-6, weight_decay=0.01,
                 amsgrad=False, adam_w_mode=True,
                 max_grad_norm=1.0):

FusedAdagrad接口

class FusedAdagrad(Optimizer):
    def __init__(self, params, lr=1e-2, eps=1e-10,
                 weight_decay=0., adagrad_w_mode=False):

3.使用自适应混合精度优化(PyTorch)

适用范围:开启torch amp后,loss不收敛或模型效果下降时,使用tiacc_training amp接口提升模型效果

import torch
from tilearn.llm.torch.adapt_amp import MixedPrecision_TrainingPolicy

def main():
    #使用tiacc自适应混合精度
    scaler = torch.cuda.amp.GradScaler()
    #实例化tiacc自适应混合精度策略类的对象
    schedulePolicy = "TimeSchedulePolicy"
    policy = MixedPrecision_TrainingPolicy(
            policy=schedulePolicy,
            start_time=0, end_time=40)
    #根据输入的参数得到当前epoch是否需要开启混合精度
    for epoch in range(0, 51):
        mixed_precision = policy.enable_mixed_precision(epoch,
                          scaler=scaler)

        print(mixed_precision)
        #with amp.autocast(enabled=mixed_precision):
        #    outputs = model(inputs)
        #    loss = criterion(outputs, targets)

        #scaler.scale(loss).backward()
        #scaler.step(optimizer)
        #scaler.update()


main()

1) MixedPrecision_TrainingPolicy类接口

实现对训练过程中自动混合精度自适应策略的实例化,自适应策略包括时间混合精度、时间学习率混合精度策略、损失函数混合精度策略。

初始化参数:

是否必填 参数说明 示例 默认值
自适应混合精度策略,0:时间混合精度,适用于通用自适应情况; 1:时间学习率混合精度策略,适用于训练过程中某一阶段loss波动出现异常的情况; 2:损失函数混合精度策略,适用于训练过程中loss下降过快或过慢情况。 0
开启自适应混合精度的开始时间,一般建议设为10。策略为0和1时必填,为2时非必填。 10 10
开启自适应混合精度的结束时间,一般建议设为最后一个epoch时间。策略为0和1时必填,为2时非必填。 1000 None
开启策略1时的保持时间,在保持时间内采用统一策略:开启或者不开启。一般建议为训练过程中loss异常波动的持续时间。策略为1时必填,为0和2时非必填。 20 None
开启策略2的间隔时间,默认值为1000,即每间隔1000轮epoch开启策略2。策略为2时需要填写,为0和1时无需必填。 1000 1000
在interval_time间隔时间开启策略2后的保持时间,默认值为100,如interval_time为1000,即在1000-1100,2000-2100...开启策略2。策略为2时需要填写,为0和1时无需必填。 100 100

policy实例化对象:

对象 类型 对象说明
policy MixedPrecision_TrainingPolicy类 训练过程中自动混合精度自适应策略的实例化对象

2) 自适应混合精度 enable_mixed_precision函数方法

属于MixedPrecision_TrainingPolicy类,根据输入的参数得到当前epoch是否需要开启自动混合精度。 输入参数:

参数 类型 是否必填 参数说明 示例 默认值
epoch INT 当前的epoch 20
scaler torch.cuda.amp.GradScaler 梯度缩放实例化对象 scaler
lr float lr是当前epoch的学习率 0.01 None
loss float loss是上一轮epoch的损失值 0.1 None

输出参数:

输出参数 类型 参数说明
mixed_precision BOOL 输入的参数得到当前epoch是否需要开启自动混合精度,是返回TRUE,否则返回FLASE。

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