Table of Contents

maxLevel	2

Opis

PyTorch je python knjižnica namijenjena razvoju aplikacija temeljenih na dubokom učenju koja se oslanja na ubrzanje grafičkim procesorima. Glavne prednosti koje PyTorch knjižnica pruža su imperativni pristup programiranju na "python" način, kroz sučelje koje omogućuje lakše otkrivanje grešaka i koje je prilagođeno postojećim python znanstvenim knjižnicama.

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Službena stranica - https://pytorch.org/
Priručnik - https://pytorch.org/docs/stable/index.html
torchrunDistribuirani proračun
- torchrun API - https://pytorch.org/docs/stable/elastic/run.html
- Primjeri primjeri - https://pytorch.org/tutorials/intermediate/dist_tuto.html
accelerate
- API - https://huggingface.co/docs/accelerate/index
- primjeri - https://huggingface.co/docs/accelerate/usage_guides/training_zoo

Primjeri

Ispod se nalaze primjeri pozivanja naredbi i aplikacija unutar kontejnera i aplikacija umjetnog benchmarka koji testira performanse na modelu Resnet50.

Pozivanje naredbi

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unutar kontejnera

Code Block

language	bash
title	test.sh
linenumbers	true
collapse	true

[korisnik@x3000c0s25b0n0] $ module load scientific/pytorch/1.14.0-ngc
[korisnik@x3000c0s25b0n0] $ run-command.sh pip3 list
INFO:    underlay of /etc/localtime required more than 50 (95) bind mounts
INFO:    underlay of /usr/bin/nvidia-smi required more than 50 (474) bind mounts
13:4: not a valid test operator: (
13:4: not a valid test operator: 510.47.03
Package                 Version
----------------------- -------------------------------
absl-py                 1.3.0
accelerate              0.19.0
apex                    0.1
appdirs                 1.4.4
argon2-cffi             21.3.0
argon2-cffi-bindings    21.2.0
asttokens               2.2.1
...

torchrun

Aplikacija na jednom grafičkom procesoru

Code Block

language	py
title	singlegpu.py
linenumbers	true
collapse	true

# source
# - https://github.com/horovod/horovod/blob/master/examples/pytorch/pytorch_synthetic_benchmark.py

import argparse
import torch.backends.cudnn as cudnn
import torch.nn.functional as F
import torch.optim as optim
import torch.utils.data.distributed
from torchvision import models

import sys
import time
import numpy as np

# Benchmark settings
parser = argparse.ArgumentParser(description='PyTorch Synthetic Benchmark',
                                 formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument("-i",
                    "--images",
                    type=int,
                    help="image number",
                    default=1024)
parser.add_argument('--batch_size',
                    type=int,
                    default=32,
                    help='input batch size')
parser.add_argument("-e",
                    "--epochs",
                    type=int,
                    help="epochs",
                    default=1)
parser.add_argument('--model',
                    type=str,
                    default='resnet50',
                    help='model to benchmark')
args = parser.parse_args()

# model
model = getattr(models, args.model)()
model.cuda()

lr_scaler = 1
optimizer = optim.SGD(model.parameters(), lr=0.01 * lr_scaler)

cudnn.benchmark = True

# data
data = torch.randn(args.batch_size, 3, 224, 224)
target = torch.LongTensor(args.batch_size).random_() % 1000
data, target = data.cuda(), target.cuda()

# fit
def benchmark_step():
    optimizer.zero_grad()
    output = model(data)
    loss = F.cross_entropy(output, target)
    loss.backward()
    optimizer.step()
    return loss.item()

for epoch in range(args.epochs):
    begin = time.time()
    for batches in range(args.images//args.batch_size):
        loss = benchmark_step()
        if (batches%10 == 0):
            print('--- Epoch %2i, Batch %3i: Loss = %0.2f ---' % (epoch,
                                                                  batches,
                                                                  loss,))
    end = time.time()
    imgsec = args.images//(end-begin)
    print('--- Epoch %2i finished: %0.2f img/sec ---' % (epoch, imgsec))

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Code Block

language	bash
title	singlegpu.sh
linenumbers	true
collapse	true

#!/bin/bash

#PBS -q gpu
#PBS -l ngpus=1

# pozovi modul
module load scientific/pytorch/1.14.0-ngc

# pomakni se u direktorij gdje se nalazi skripta
cd ${PBS_O_WORKDIR:-""}

# potjeraj skriptu korištenjem run-singlegpu.sh
run-singlegpu.sh singlegpu.py \
  --images 25600 \
  --batch_size 256 \
  --epochs 1

Aplikacija na više grafičkih procesora i jednom čvoru

Code Block

language	py
title	multigpu-singlenode.py
linenumbers	true
collapse	true

# source
# - https://pytorch.org/tutorials/intermediate/dist_tuto.html
# - https://pytorch.org/vision/main/generated/torchvision.datasets.FakeData.html
# - https://tuni-itc.github.io/wiki/Technical-Notes/Distributed_dataparallel_pytorch/#setting-up-the-same-model-with-distributeddataparallel

import time

import torch
import torch.nn as nn
import torch.optim as optim
import torch.distributed as dist

from torch.utils.data import DataLoader
from torch.utils.data.distributed import DistributedSampler
from torch.nn.parallel import DistributedDataParallel as DDP

from torchvision.models import resnet50
from torchvision.datasets import FakeData
from torchvision.transforms import ToTensor

def main():

    # vars
    batch = 256
    samples = 25600
    epochs = 3

    # init
    dist.init_process_group("nccl")
    rank = dist.get_rank()
    ngpus = torch.cuda.device_count()

    # model
    model = resnet50(weights=None)
    model = model.to(rank)
    model = DDP(model, device_ids=[rank])
    optimizer = optim.SGD(model.parameters(), lr=0.001)
    loss_fn = nn.CrossEntropyLoss()

    # data
    dataset = FakeData(samples,
                       num_classes=1000,
                       transform=ToTensor())
    sampler = DistributedSampler(dataset)
    loader = DataLoader(dataset,
                        batch_size=batch//ngpus,
                        sampler=sampler,
                        shuffle=False,
                        num_workers=2,
                        pin_memory=True,)

    # train
    for epoch in range(epochs):
        start = time.time()
        for batch, (images, labels) in enumerate(loader):
            images = images.to(rank)
            labels = labels.to(rank)
            outputs = model(images)
            classes = torch.argmax(outputs, dim=1)
            loss = loss_fn(outputs, labels)
            optimizer.zero_grad()
            loss.backward()
            optimizer.step()
            if (rank == 0) and (batch%10 == 0):
                print('epoch: %3d, batch: %3d, loss: %0.4f' % (epoch+1,
                                                               batch,
                                                               loss.item()))
        if (rank == 0):
            elapsed = time.time()-start
            img_sec = samples/elapsed
            print('Epoch complete in %s seconds [%f img/sec] ' % (elapsed, img_sec))

    # clean
    dist.destroy_process_group()

if __name__ == "__main__":
    main()

...

Code Block

language	bash
title	multigpu-singlenode.sh
linenumbers	true
collapse	true

#!/bin/bash

#PBS -q gpu
#PBS -l ngpus=4
#PBS -l ncpus=16

# pozovi modul
module load scientific/pytorch/1.14.0-ngc

# pomakni se u direktorij gdje se nalazi skripta
cd ${PBS_O_WORKDIR:-""}

# potjeraj skriptu korištenjem torchrun-singlenode.sh
torchrun-singlenode.sh multigpu-singlenode.py

Aplikacija na više grafičkih procesora i više čvorova

Code Block

language	py
title	multigpu-multinode.py
linenumbers	true
collapse	true

# source
# - https://pytorch.org/tutorials/intermediate/dist_tuto.html
# - https://pytorch.org/vision/main/generated/torchvision.datasets.FakeData.html
# - https://tuni-itc.github.io/wiki/Technical-Notes/Distributed_dataparallel_pytorch/#setting-up-the-same-model-with-distributeddataparallel

import os
import time

import torch
import torch.nn as nn
import torch.optim as optim
import torch.distributed as dist

from torch.utils.data import DataLoader
from torch.utils.data.distributed import DistributedSampler
from torch.nn.parallel import DistributedDataParallel as DDP

from torchvision.models import resnet50
from torchvision.datasets import FakeData
from torchvision.transforms import ToTensor

def main():

    # vars
    batch = 256
    samples = 256*100
    epochs = 3

    # init
    dist.init_process_group("nccl")
    rank = int(os.environ['LOCAL_RANK'])
    global_rank = int(os.environ['RANK'])

    # model
    model = resnet50(weights=None)
    model = model.to(rank)
    model = DDP(model, device_ids=[rank])
    optimizer = optim.SGD(model.parameters(), lr=0.001)
    loss_fn = nn.CrossEntropyLoss()

    # data
    dataset = FakeData(samples,
                       num_classes=1000,
                       transform=ToTensor())
    sampler = DistributedSampler(dataset)
    loader = DataLoader(dataset,
                        batch_size=batch,
                        sampler=sampler,
                        shuffle=False,
                        num_workers=1,
                        pin_memory=True,)

    # train
    for epoch in range(epochs):
        start = time.time()
        for batch, (images, labels) in enumerate(loader):
            images = images.to(rank)
            labels = labels.to(rank)
            outputs = model(images)
            classes = torch.argmax(outputs, dim=1)
            loss = loss_fn(outputs, labels)
            optimizer.zero_grad()
            loss.backward()
            optimizer.step()
            if (global_rank == 0) and (batch%10 == 0):
                print('epoch: %3d, batch: %3d/%3d, loss: %0.4f' % (epoch+1,
                                                                   batch,
                                                                   len(loader),
                                                                   loss.item()))
        if (global_rank == 0):
            elapsed = time.time()-start
            img_sec = samples/elapsed
            print('Epoch complete in %0.2f seconds [%0.2f img/sec] ' % (elapsed, img_sec))

    # clean
    dist.destroy_process_group()

if __name__ == "__main__":
    main()

...

Code Block

language	bash
title	multigpu-multinode.sh
linenumbers	true
collapse	true

#!/bin/bash

#PBS -q gpu
#PBS -l select=8:ngpus=1:ncpus=4

# pozovi module
module load scientific/pytorch/1.14.0-ngc
module load cray-pals

# pomakni se u direktorij gdje se nalazi skripta
cd ${PBS_O_WORKDIR:-""}

# potjeraj skriptu korištenjem torchrun-multinode.sh
torchrun-multinode.sh multigpu-multinode.py

Napomene

accelerate

Aplikacija na jednom čvoru

tip

Code Block

language	bash


title	Apptainer i runaccelerate-singlenode-run.sh
linenumbers	true
collapse	true

#!/bin/bash

#PBS -q gpu
#PBS -l select=1:ngpus=2:ncpus=8
#PBS -o output/
#PBS -e output/
  
# env
module load scientific/pytorch/2.0.0

# cd
cd ${PBS_O_WORKDIR:-""}

# run
accelerate-singlenode.sh accelerate-singlenode.py

Code Block

language	py
title	accelerate-singlenode.py
linenumbers	true
collapse	true

# source
# - https://github.com/horovod/horovod/blob/master/examples/pytorch/pytorch_synthetic_benchmark.py

import torch
import torch.nn as nn
import torch.nn.functional as F
import torch.optim as optim

from accelerate import Accelerator

from torchvision import models
from torch.utils.data import DataLoader
from torchvision.datasets import FakeData
from torchvision.transforms import ToTensor

import os
import sys
import time
import pprint
import numpy as np

def main():

    # settings
    epochs = 3
    batch_size = 256
    image_number = 256*30
    model = 'resnet50'

    # accelerator
    accelerator = Accelerator()

    # model
    model = getattr(models, model)()
    model.to(accelerator.device)

    # optimizer
    optimizer = optim.SGD(model.parameters(), lr=0.01)
    loss_function = nn.CrossEntropyLoss()

    # loader
    data = FakeData(image_number,
                    num_classes=1000,
                    transform=ToTensor())

    loader = DataLoader(data,
                        batch_size=batch_size)

    # scheduler
    scheduler = optim.lr_scheduler.ExponentialLR(optimizer, gamma=0.9)

    # prepare
    model, optimizer, loader, scheduler = accelerator.prepare(model,
                                                              optimizer,
                                                              loader,
                                                              scheduler)

    # fit
    for epoch in range(epochs):
        start = time.time()
        for batch, (images, labels) in enumerate(loader):
            optimizer.zero_grad()
            images = images.to(accelerator.device)
            labels = labels.to(accelerator.device)
            outputs = model(images)
            classes = torch.argmax(outputs, dim=1)
            loss = loss_function(outputs, labels)
            accelerator.backward(loss)
            optimizer.step()
            scheduler.step()
            if (batch%1 == 0) and ('RANK' not in os.environ or os.environ['RANK'] == '0'):
                print('--- Epoch %2i, Batch %3i: Loss = %0.2f ---' % (epoch, batch, loss,))

        if 'RANK' not in os.environ or os.environ['RANK'] == '0' :
            end = time.time()
            imgsec = image_number/(end-start)
            print('--- Epoch %2i, Finished: %0.2f img/sec ---' % (epoch, imgsec))

if __name__ == '__main__':
    main()

Aplikacija na više čvorova

Code Block

language	bash
title	accelerate-multinode-run.sh
linenumbers	true
collapse	true

#!/bin/bash

#PBS -q gpu
#PBS -l select=2:ngpus=2:ncpus=8
#PBS -o output/
#PBS -e output/

# env
module load scientific/pytorch/2.0.0

# cd
cd ${PBS_O_WORKDIR:-""}

# run
accelerate-multinode.sh accelerate-multinode.py

Code Block

language	py
title	accelerate-multinode.py
linenumbers	true
collapse	true

# source
# - https://github.com/horovod/horovod/blob/master/examples/pytorch/pytorch_synthetic_benchmark.py

import torch
import torch.nn as nn
import torch.nn.functional as F
import torch.optim as optim

from accelerate import Accelerator

from torchvision import models
from torch.utils.data import DataLoader
from torchvision.datasets import FakeData
from torchvision.transforms import ToTensor

import os
import sys
import time
import pprint
import socket
import numpy as np

def main():

    # settings
    epochs = 10
    batch_size = 256
    image_number = 256*30
    model = 'resnet50'

    # accelerator
    accelerator = Accelerator()

    # model
    model = getattr(models, model)()
    model.to(accelerator.device)

    # optimizer
    optimizer = optim.SGD(model.parameters(), lr=0.01)
    loss_function = nn.CrossEntropyLoss()

    # loader
    data = FakeData(image_number,
                    num_classes=1000,
                    transform=ToTensor())

    loader = DataLoader(data,
                        batch_size=batch_size)

    # scheduler
    scheduler = optim.lr_scheduler.ExponentialLR(optimizer, gamma=0.9)

    # prepare
    model, optimizer, loader, scheduler = accelerator.prepare(model,
                                                              optimizer,
                                                              loader,
                                                              scheduler)
    # fit
    for epoch in range(epochs):
        start = time.time()
        for batch, (images, labels) in enumerate(loader):
            optimizer.zero_grad()
            images = images.to(accelerator.device)
            labels = labels.to(accelerator.device)
            outputs = model(images)
            classes = torch.argmax(outputs, dim=1)
            loss = loss_function(outputs, labels)
            accelerator.backward(loss)
            optimizer.step()
            scheduler.step()
            if (batch%1 == 0) and ('RANK' not in os.environ or os.environ['RANK'] == '0'):
                print('--- Epoch %2i, Batch %3i: Loss = %0.2f ---' % (epoch, batch, loss,))

        if 'RANK' not in os.environ or os.environ['RANK'] == '0' :
            end = time.time()
            imgsec = image_number/(end-start)
            print('--- Epoch %2i, Finished: %0.2f img/sec ---' % (epoch, imgsec))

if __name__ == '__main__':
    main()

Napomene

Tip

title	Apptainer i run-singlenode.sh

Ova knjižnica je dostavljena Ova knjižnica je dostavljena u obliku kontejnera, zbog opterećenja koje pip/conda virtualna okruženja stvaraju na Lustre dijeljenim datotečnim sustavima.

Za ispravno izvršavanje python aplikacija ili naredbi koje se u njemu nalaze, potrebno je koristiti wrappere u skriptama sustava PBS:

Za izvršavanje naredbi u kontejneru na samo jednom čvoru:
- run-command.sh
Za izvršavanje skripti python na jednom grafičkom procesoru
- run-singlegpu.sh
Za izvršavanje skripti python na više grafičkih procesora (dostupno za PyTorch v1.10+)
- torchrun
  - torchrun-singlenode.sh - jedan čvor
  - torchrun-multinode.sh - više čvorova
- accelerate
  - accelerate-singlenode.sh - jedan čvor
  - accelerate-multinode.sh - više čvorova

Načini pozivanja wrappera opisani su u primjerima iznad.

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Versions Compared

Old Version 14

New Version 15

Key

Opis

Primjeri

Pozivanje naredbi

unutar kontejnera

torchrun

Aplikacija na jednom grafičkom procesoru

Aplikacija na više grafičkih procesora i jednom čvoru

Aplikacija na više grafičkih procesora i više čvorova

Napomene

accelerate

Aplikacija na jednom čvoru

Aplikacija na više čvorova

Napomene

Space shortcuts

Page tree

Page History

Versions Compared

Old Version 14

New Version 15

Key

Opis

Primjeri

Pozivanje naredbi

unutar kontejnera

torchrun

Aplikacija na jednom grafičkom procesoru

Aplikacija na više grafičkih procesora i jednom čvoru

Aplikacija na više grafičkih procesora i više čvorova

Napomene

accelerate

Aplikacija na jednom čvoru

Aplikacija na više čvorova

Napomene