Dne 12. 02. 24 v 19:29 Julian Sikorski napsal(a):
Hello,
has anyone successfully managed to get ccache to speed up kernel mockbuilds, be it SRPMS from kernel-ark or from
dist-git? I gave it a brief shot but saw no difference, if anything the build was slower.
The machine I am building on has 32 GB RAM which is not quite enough to fit everything on a ramdisk, and the drive I
am building to is an NVME SSD, "only" PCI Express 3.0. CPU is a Ryzen 5 5600x. A baseonly builds takes about 25
minutes, which is somewhat annoying when one has to bisect something.
If ccache can speed this up, how big does it need to be? I understand the default 4 GB is nowhere near enough but what
would be needed to actually help? Thanks!
Just to be sure - did you configured Mock to use it?
https://rpm-software-management.github.io/mock/Plugin-CCache
the build from build container cannot see host ccache, so Mock must specially configure it.
This is by default off, because in multi user environment you can easily poison the cache and affect different build.
This should be enabled only on VM where you trust all users that can run Mock. E.g. your personal developer workstation.
--
Miroslav Suchy, RHCA
Red Hat, Manager, Packit and CPT, #brno, #fedora-buildsys
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