Question

我正在尝试使用来自 tensorflow keras 的 Sequential 模型。当我执行以下语句时：

model.fit(x_train, y_train, epochs=20, verbose=True, validation_data=(x_dev, y_dev), batch_size=10)

我收到以下错误：

I tensorflow/compiler/mlir/mlir_graph_optimization_pass.cc:116] None of the MLIR optimization passes are enabled (registered 2)

W tensorflow/core/platform/profile_utils/cpu_utils.cc:126] Failed to get CPU frequency: 0 Hz

F tensorflow/core/grappler/costs/op_level_cost_estimator.cc:710] Check failed: 0 < gflops (0 vs. 0)type: "CPU"

我无法理解如何修复它。任何人都可以帮助我。

从 github 上的 this issue，我了解到 device.frequency() 返回 0 可能是因为 NominalCPUFrequency() 返回 1。然而，这些信息对我来说似乎太抽象了，我无法理解。

Answer 1

前两个不用担心。

第三个有问题。您安装了不正确的 TensorFlow 版本。使用支持 Mac M1 芯片的芯片。

运行以下 bash 脚本下载并安装 TensorFlow。

#!/bin/bash

set -e

VERSION=0.1alpha3
INSTALLER_PACKAGE=tensorflow_macos-$VERSION.tar.gz
INSTALLER_PATH=https://github.com/apple/tensorflow_macos/releases/download/v$VERSION/$INSTALLER_PACKAGE
INSTALLER_SCRIPT=install_venv.sh

echo

# Check to make sure we're good to go.
if [[ $(uname) != Darwin ]] || [[ $(sw_vers -productName) != macOS ]] || [[ $(sw_vers -productVersion) != "11."* ]] ; then 
  echo "ERROR: TensorFlow with ML Compute acceleration is only available on macOS 11.0 and later." 
  exit 1
fi

# This 
echo "Installation script for pre-release tensorflow_macos $VERSION.  Please visit https://github.com/apple/tensorflow_macos "
echo "for instructions and license information."   
echo
echo "This script will download tensorflow_macos $VERSION and needed binary dependencies, then install them into a new "
echo "or existing Python 3.8 virtual environment."

# Make sure the user knows what's going on.  
read -p 'Continue [y/N]? '    

if [[ ! $REPLY =~ ^[Yy]$ ]]
then
exit 1
fi
echo

echo "Downloading installer."
tmp_dir=$(mktemp -d)

pushd $tmp_dir

curl -LO $INSTALLER_PATH 

echo "Extracting installer."
tar xf $INSTALLER_PACKAGE

cd tensorflow_macos 

function graceful_error () { 
  echo 
  echo "Error running installation script with default options.  Please fix the above errors and proceed by running "
  echo 
  echo "  $PWD/$INSTALLER_SCRIPT --prompt"
  echo 
  echo
  exit 1
}

bash ./$INSTALLER_SCRIPT --prompt || graceful_error 

popd
rm -rf $tmp_dir

参考：https://github.com/apple/tensorflow_macos

Answer 2

我在 macOS 11.4 上做了如下操作（即使参考说“操作系统要求 macOS 12.0+”），python==3.8.2 并且工作 [ref: https://developer.apple.com/metal/张量流插件/]：

在 x86 终端上创建一个 venv，即 Rosetta 终端（参见：https://dev.to/courier/tips-and-tricks-to-setup-your-apple-m1-for-development-547g）即环境设置： x86 : AMD 创建 venv：python3 -m venv ~/PATH/tensorflow-metal（用你的真实路径替换 PATH）激活 venv: source ~/PATH/tensorflow-metal/bin/activate 更新pip：python -m pip install -U pip
安装您需要的任何库/包。例如：例如：pip install matplotlib jupyterlab
安装基础张量流： python -m pip install tensorflow-macos
安装金属插件： python -m pip install tensorflow-metal

祝你好运和干杯！

无法在带有 BigSur 的 Mac M1 上使用 keras 模型

2 个答案: