如何在Linux上启用CCACHE



在GNU/Linux上启用ccache的文档很少。这是launchpad.net的响应:

目前,我认为启用CCACHE的最好方法是添加 "/usr/lib/ccache"到您的路径的前部。如果您想启用它 对于所有用户默认情况下,更改路径变量 /etc/环境。

有人可以给我更多有关启用ccache的信息吗?

下载最新版本的CCache以获得更好的性能。

下载后,请按照以下提到的步骤操作:

a)使用以下命令:

tar tar文件。
 $tar -xvf ccache-3.2.4.tar.bz2
 
 Note : I'm using ccache 3.2.4 Version.You can download the latest one.

b)进入CCACHE-3.2.4文件夹并运行以下命令:

 $./configure
 $./make 
 $ sudo make install

c)转到您的.bashrc并插入以下内容:

 export CCACHE_DIR=/home/user_name/.ccache
 export CCACHE_TEMPDIR=/home/user_name/.ccache
 Note : Fill user_name with your User Name

d)保存您的bashrc并来源

 $ source ~/.bashrc

e)检查CCACHE是否有效或不键入:

 ccache -M 10G : To Set the ccache Size to 10GB

f)检查CCACHE是否有效还是不键入:

 ccache -s : To check ccache statistics 

CCACHE手册具有一个名为"运行模式"的部分,该部分描述了激活CCACHE的官方方法,因此我建议阅读该手册。

另外,正如您已经指出的那样,Linux发行版通常设置A/usr/lib/ccache目录,该目录被设计为备用路径。

至少有两种方法:

i)覆盖 CCCXX,...在makefile中标记。在R框架中,读取系统和可选的用户配置文件,我只是设置

VER=4.7
CC=ccache gcc-$(VER)
CXX=ccache g++-$(VER)
SHLIB_CXXLD=g++-$(VER)
FC=ccache gfortran
F77=ccache gfortran

这也使我可以在gcc版本之间来回切换。现在所有涉及r的汇编都使用ccache

ii)对于其他用途,我已经部署了一个事实,即在/usr/bin之前检查了/usr/local/bin/。所以一个人可以做

root@max:/usr/local/bin# ls -l gcc
lrwxrwxrwx 1 root root 15 Jan 27 11:04 gcc -> /usr/bin/ccache
root@max:/usr/local/bin# ./gcc --version
gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
root@max:/usr/local/bin# 

现在通过ccache调用gcc

edd@max:/tmp$ cp -vax ~/src/progs/C/benfordsLaw.c .
`/home/edd/src/progs/C/benfordsLaw.c' -> `./benfordsLaw.c'
edd@max:/tmp$ time /usr/local/bin/gcc -c benfordsLaw.c 
real    0m0.292s
user    0m0.052s
sys     0m0.012s
edd@max:/tmp$ time /usr/local/bin/gcc -c benfordsLaw.c 
real    0m0.026s
user    0m0.004s
sys     0m0.000s
edd@max:/tmp$ 

另一种可能性(而不是keltar评论的export CC=ccache),如果$HOME/bin//usr/bin/之前列出了$PATH,则是制作Symlink

 ln -s /usr/bin/ccache $HOME/bin/gcc

然后, gcc的每个execvp(3)都会发现Symlink

ubuntu安装ccache

  1. sudo apt-get安装ccache
  2. 安装后确认安装执行;
$ which ccache
/usr/bin/ccache
  1. 将以下内容添加到"〜/.bashrc"中。或"〜/.zshrc ==&quot"文件
# ccache
export USE_CCACHE=1
export CCACHE_SLOPPINESS=file_macro,include_file_mtime,time_macros
export CCACHE_UMASK=002

source;〜/.bashrc; &quort;〜/.zshrc; ;4. CCACHE默认设置的5 GB磁盘空间通常足够。如果您担心它,可以增加它, CCACHE -M 30G 5.通过版本确认成功安装

$ ccache --version
ccache version 3.4.1
Copyright (C) 2002-2007 Andrew Tridgell
Copyright (C) 2009-2018 Joel Rosdahl
  1. 您可以通过 CCACHE查看当前配置-S
cache directory                     /home/username/.ccache
primary config                      /home/username/.ccache/ccache.conf
secondary config      (readonly)    /etc/ccache.conf
stats zero time                     Fri Jul 22 16:15:40 2022
cache hit (direct)                  4186
cache hit (preprocessed)             875
cache miss                          1069
cache hit rate                      82.56 %
called for link                      653
cleanups performed                     0
files in cache                      3209
cache size                          159.3 MB
max cache size                      30.0 GB

使用libzmq测试CCACHE

  1. 通过 github 下载 libzmq的源代码
$ git clone  https://github.com/zeromq/libzmq.git
Cloning into 'libzmq'...
remote: Enumerating objects: 43791, done.
remote: Counting objects: 100% (36/36), done.
remote: Compressing objects: 100% (28/28), done.
remote: Total 43791 (delta 11), reused 24 (delta 8), pack-reused 43755
Receiving objects: 100% (43791/43791), 21.91 MiB | 1.03 MiB/s, done.
Resolving deltas: 100% (31951/31951), done.
  1. libzmq 目录中创建 build 目录
  2. 修改 cmakelists。txt ,' '添加
──────┬───────────────────────────────────────────────────────────────────────────────────────
       │ File: CMakeLists.txt
───────┼──────────────────────────────────────────────────────────────────────────────────────
   1   │ # CMake build script for ZeroMQ
   2   │ project(ZeroMQ)
   3   │ 
   4   │ if(${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
   5   │   cmake_minimum_required(VERSION 3.0.2)
   6   │ else()
   7   │   cmake_minimum_required(VERSION 2.8.12)
   8   │ endif()
   9   │ 
  10 + │ find_program(CCACHE_FOUND ccache)
  11 + │ if(CCACHE_FOUND)
  12 + │     set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
  13 + │     set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
  14 + │     message(STATUS "use ccache")
  15 + │ endif(CCACHE_FOUND)
  16 + │ 
  17   │ include(CheckIncludeFiles)
  1. 执行;打印和显示** - 使用ccache"**表示Enable CCACHE ,但请注意,当每个项目启用 CCACHE 时,它将不会加快汇编速度,而是将编译缓存保存到"/home/username/。缓存" 以后的汇编目录
$ cmake ..
-- The C compiler identification is GNU 7.5.0
-- The CXX compiler identification is GNU 7.5.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- use ccache
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE 
...
  1. 使用"/usr/bin/time&quot" 命令记录汇编时间
/usr/bin/time make -j3
result:
48.79user 14.25system 0:21.60elapsed 291%CPU (0avgtext+0avgdata 176036maxresident)k
0inputs+282248outputs (0major+2406923minor)pagefaults 0swaps
  1. 'rm -rf *&quort' delete build 目录中的所有文件
  2. cmake ..
  3. 使用"/usr/bin/time&quot" 命令记录汇编时间
/usr/bin/time make -j3
result:
2.78user 2.42system 0:02.15elapsed 241%CPU (0avgtext+0avgdata 23736maxresident)k
0inputs+21744outputs (0major+232849minor)pagefaults 0swaps

https://www.cnblogs.com/jiangyibo/p/16516932.html

相关内容

  • 没有找到相关文章

最新更新