nnprof

Introduction

nnprof is a profile tool for pytorch neural networks.

Features

  • multi profile mode: nnprof support 4 profile mode: Layer level, Operation level, Mixed level, Layer Tree level. Please check below for detail usage.
  • time and memory profile: nnprof support both time and memory profile now. But since memory profile is first supported in pytorch 1.6, please use torch version >= 1.6 for memory profile.
  • support sorted by given key and show profile percent: user could print table with percentage and sorted profile info using a given key, which is really helpful for optimiziing neural network.

Requirements

  • Python >= 3.6
  • PyTorch
  • Numpy

Get Started

install nnprof

  • pip install:
pip install nnprof
  • from source:
python -m pip install 'git+https://github.com/FateScript/nnprof.git'

# or install after clone this repo
git clone https://github.com/FateScript/nnprof.git
pip install -e nnprof

use nnprf

from nnprof import profile, ProfileMode
import torch
import torchvision

model = torchvision.models.alexnet(pretrained=False)
x = torch.rand([1, 3, 224, 224])

# mode could be anyone in LAYER, OP, MIXED, LAYER_TREE
mode = ProfileMode.LAYER

with profile(model, mode=mode) as prof:
    y = model(x)

print(prof.table(average=False, sorted_by="cpu_time"))
# table could be sorted by presented header.

Part of presented table looks like table below, Note that they are sorted by cpu_time.

╒══════════════════════╤═══════════════════╤═══════════════════╤════════╕
│ name                 │ self_cpu_time     │ cpu_time          │   hits │
╞══════════════════════╪═══════════════════╪═══════════════════╪════════╡
│ AlexNet.features.0   │ 19.114ms (34.77%) │ 76.383ms (45.65%) │      1 │
├──────────────────────┼───────────────────┼───────────────────┼────────┤
│ AlexNet.features.3   │ 5.148ms (9.37%)   │ 20.576ms (12.30%) │      1 │
├──────────────────────┼───────────────────┼───────────────────┼────────┤
│ AlexNet.features.8   │ 4.839ms (8.80%)   │ 19.336ms (11.56%) │      1 │
├──────────────────────┼───────────────────┼───────────────────┼────────┤
│ AlexNet.features.6   │ 4.162ms (7.57%)   │ 16.632ms (9.94%)  │      1 │
├──────────────────────┼───────────────────┼───────────────────┼────────┤
│ AlexNet.features.10  │ 2.705ms (4.92%)   │ 10.713ms (6.40%)  │      1 │
├──────────────────────┼───────────────────┼───────────────────┼────────┤

You are welcomed to try diffierent profile mode and more table format.

Contribution

Any issues and pull requests are welcomed.

Acknowledgement

Some thoughts of nnprof are inspired by torchprof and torch.autograd.profile . Many thanks to the authors.

GitHub

https://github.com/FateScript/nnprof