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some ad-hoc experiments and manual compilation for gcc 8 (instead of gcc 6.3) using a custom Docker image (the old tuxml/tuxml3:dev)
root@ad1cc9a80f87:/linux-4.17# ls -alrth /TuxML/linux-4.13.3/vmlinux
-rwxr-xr-x. 1 root root 3.1M Jan 7 17:01 /TuxML/linux-4.13.3/vmlinux
root@ad1cc9a80f87:/linux-4.17# ls -alrth /linux-4.15/vmlinux
ls: cannot access '/linux-4.15/vmlinux': No such file or directory
root@ad1cc9a80f87:/linux-4.17# ls -alrth /linux-4.17/vmlinux
-rwxr-xr-x. 1 root root 12M Jan 7 18:09 /linux-4.17/vmlinux
root@ad1cc9a80f87:/linux-4.17# ls -alrth /linux-5.0/vmlinux
-rwxr-xr-x. 1 root root 12M Jan 7 17:16 /linux-5.0/vmlinux
root@ad1cc9a80f87:/linux-4.17# ls -alrth /linux-5.4/vmlinux
-rwxr-xr-x. 1 root root 12M Jan 7 16:57 /linux-5.4/vmlinux
root@ad1cc9a80f87:/linux-4.17# ls -alrth /linux-5.8/vmlinux
-rwxr-xr-x. 1 root root 12M Jan 7 16:05 /linux-5.8/vmlinux
root@ad1cc9a80f87:/linux-4.17# gcc --version
gcc (Debian 8.3.0-6) 8.3.0
Copyright (C) 2018 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.
there is a "surprising" and noticeable decrease for 4.13.3 (3Mb for gcc 8 instead of 7Mb for gcc 6)...
it actually motivated this experiment
but then for other kernel versions, gcc 8 is very similar to gcc 6.3 (12Mb all along)
these results suggest two hypothesis that are worth investigating in the future:
it might be the case that gcc version does not influence much binary size
why then this strong decrease specifically for 4.13.3?
It calls to implement the following:
systematize the experiments with TuxML machinery (kernel_generator, etc.) instead of ad-hoc experiments
experiments with gcc 10 (not only gcc 6 and 8 as did above) and several kernel versions
experiments with defconfig and gcc 6, 9, and 10 on different kernel versions
experiments with random configurations and gcc 6, 9, and 10 on different kernel versions (note: given a random config, we should give the same one for gcc versions/kernel versions for comparing over the same config)
analyze the data and conclude about hypothesis
The text was updated successfully, but these errors were encountered:
some ad-hoc experiments and manual compilation for gcc 8 (instead of gcc 6.3) using a custom Docker image (the old tuxml/tuxml3:dev)
there is a "surprising" and noticeable decrease for 4.13.3 (3Mb for gcc 8 instead of 7Mb for gcc 6)...
it actually motivated this experiment
but then for other kernel versions, gcc 8 is very similar to gcc 6.3 (12Mb all along)
see data that have been gathered for gcc 6.3
https://github.com/TuxML/evolution-showcase
https://github.com/TuxML/evolution-showcase/blob/master/evo-kernel-linux.png
these results suggest two hypothesis that are worth investigating in the future:
It calls to implement the following:
The text was updated successfully, but these errors were encountered: