Difference between revisions of "Speed Builds Using Compiler Cache"
From odroid US
(Created page with "A package named ccache can speed up builds. It is easy to use. <pre> # install the c compiler cache # as root apt-get install ccache # add symlinks so ccache can invoke the ...") |
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| − | A package named ccache can speed up builds. It is easy to use. | + | A package named ccache can speed up builds. It is easy to use. |
<pre> | <pre> | ||
| Line 8: | Line 8: | ||
# /usr/local/bin is usually in the path before /usr/bin, so that is where we put the symlinks | # /usr/local/bin is usually in the path before /usr/bin, so that is where we put the symlinks | ||
cd /usr/local/bin | cd /usr/local/bin | ||
| − | ln -s $(which ccache) gcc | + | # The CROSS_COMPILE environment variable should be empty for odroid native builds, it could be something like |
| − | ln -s $(which ccache) g++ | + | # arm-none-linux-gnueabi- for cross-building on a host. |
| − | ln -s $(which ccache) cpp | + | ln -s $(which ccache) $(echo $CROSS_COMPILE)gcc |
| − | ln -s $(which ccache) c++ | + | ln -s $(which ccache) $(echo $CROSS_COMPILE)g++ |
| + | ln -s $(which ccache) $(echo $CROSS_COMPILE)cpp | ||
| + | ln -s $(which ccache) $(echo $CROSS_COMPILE)c++ | ||
</pre> | </pre> | ||
| Line 26: | Line 28: | ||
</pre> | </pre> | ||
| − | After about 45 minutes, the native build is complete. | + | After about 45 minutes, the native build is complete, using SD Card. An eMMC build completed after about 17 minutes. |
<pre> | <pre> | ||
| Line 35: | Line 37: | ||
</pre> | </pre> | ||
| − | Now the | + | Now the clean re-build takes 2 minutes 15 seconds on (eMMC) |
| + | |||
| + | Check the ccache statistics: | ||
<pre> | <pre> | ||
root@odroidu2-1:/usr/src/linux# ccache -s | root@odroidu2-1:/usr/src/linux# ccache -s | ||
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| − | + | ||
| + | === Kernel Build Time Comparisons === | ||
| + | using odroidu2_ubuntu-defconfig and linux-3.0.57 (ed's kernel) | ||
| + | |||
| + | <pre> | ||
| + | Processor : Odroid-U2 | ||
| + | Memory : 2GiB | ||
| + | Operating System : Debian Wheezy | ||
| + | |||
| + | SD-Card Clean cache, clean build 45m15s | ||
| + | SD-Card cached, clean build [re-test this] | ||
| + | eMMC Clean cache, clean build 17m14s | ||
| + | eMMC cached, clean build 2m10s | ||
| + | </pre> | ||
| + | |||
| + | This data is for cross-building on x86_64 Linux host CodeSourcery (2011.09-64) toolchain. | ||
| + | <pre> | ||
| + | Processor : 4x Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz | ||
| + | Memory : 8177MB (2393MB used) | ||
| + | Operating System : Linux Mint 13 Maya | ||
| + | Using solid-state drive for source code and ccache directory (CCACHE_DIR) | ||
| + | |||
| + | SSD Clean cache, clean build 5m25s | ||
| + | SSD cached, clean build 0m33s | ||
| + | |||
| + | </pre> | ||
Revision as of 18:32, 14 January 2013
A package named ccache can speed up builds. It is easy to use.
# install the c compiler cache # as root apt-get install ccache # add symlinks so ccache can invoke the compiler # /usr/local/bin is usually in the path before /usr/bin, so that is where we put the symlinks cd /usr/local/bin # The CROSS_COMPILE environment variable should be empty for odroid native builds, it could be something like # arm-none-linux-gnueabi- for cross-building on a host. ln -s $(which ccache) $(echo $CROSS_COMPILE)gcc ln -s $(which ccache) $(echo $CROSS_COMPILE)g++ ln -s $(which ccache) $(echo $CROSS_COMPILE)cpp ln -s $(which ccache) $(echo $CROSS_COMPILE)c++
To test, it build the kernel. You need to be set up with kernel source and prerequisites first: (link to tutorial)
cd /usr/src/linux # clear the ccache ccache -c # start clean make clean # time make -j8
After about 45 minutes, the native build is complete, using SD Card. An eMMC build completed after about 17 minutes.
# clean the object files make clean # time the build again time make -j8
Now the clean re-build takes 2 minutes 15 seconds on (eMMC)
Check the ccache statistics:
root@odroidu2-1:/usr/src/linux# ccache -s cache directory /root/.ccache cache hit (direct) 2554 cache hit (preprocessed) 3 cache miss 0 called for link 11 called for preprocessing 2 unsupported source language 62 no input file 68 files in cache 7709 cache size 316.4 Mbytes max cache size 1.0 Gbytes root@odroidu2-1:/usr/src/linux#
Kernel Build Time Comparisons
using odroidu2_ubuntu-defconfig and linux-3.0.57 (ed's kernel)
Processor : Odroid-U2 Memory : 2GiB Operating System : Debian Wheezy SD-Card Clean cache, clean build 45m15s SD-Card cached, clean build [re-test this] eMMC Clean cache, clean build 17m14s eMMC cached, clean build 2m10s
This data is for cross-building on x86_64 Linux host CodeSourcery (2011.09-64) toolchain.
Processor : 4x Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz Memory : 8177MB (2393MB used) Operating System : Linux Mint 13 Maya Using solid-state drive for source code and ccache directory (CCACHE_DIR) SSD Clean cache, clean build 5m25s SSD cached, clean build 0m33s
