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logrusx
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Joined: 22 Feb 2018
Posts: 2745
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user
Apprentice
Joined: 08 Feb 2004
Posts: 223
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 Posted: Sun Feb 16, 2025 11:22 am Post subject: |
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| logrusx wrote: | | https://wiki.gentoo.org/wiki/Ccache |
| Code: | * Contents of dev-util/ccache-4.10.2-r1:
/usr
/usr/bin
/usr/bin/ccache
/usr/bin/ccache-config
/usr/share
/usr/share/doc
/usr/share/doc/ccache-4.10.2-r1
/usr/share/doc/ccache-4.10.2-r1/AUTHORS.adoc.lz
/usr/share/doc/ccache-4.10.2-r1/CONTRIBUTING.md.lz
/usr/share/doc/ccache-4.10.2-r1/MANUAL.adoc.lz
/usr/share/doc/ccache-4.10.2-r1/NEWS.adoc.lz
/usr/share/doc/ccache-4.10.2-r1/README.md.lz
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/ccache.1.lz
/usr/share/shadowman
/usr/share/shadowman/tools
/usr/share/shadowman/tools/ccache
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no portage-ccache |
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mi_unixbird
Tux's lil' helper
Joined: 24 Jul 2015
Posts: 142
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| Posted: Sun Feb 16, 2025 12:12 pm Post subject: |
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| user wrote: | | Which package provide "portage-ccache" ? |
Nothing, it's just a script I made that does nothing more than automatically setting the CCACHE_DIR environment variable.
The important part is this part of /etc/portage/bashrc:
| Code: | if [[ ${FEATURES} == *ccache* && ${EBUILD_PHASE_FUNC} == src_* ]]; then
export CCACHE_BASEDIR="${PORTAGE_TMPDIR}/portage"
if [[ ${CCACHE_DIR} == /var/cache/portage/ccache ]]; then
if [[ ${CATEGORY} == kde-frameworks ]]; then
export CCACHE_DIR=${CCACHE_DIR}/${CATEGORY}
else
export CCACHE_DIR=${CCACHE_DIR}/${CATEGORY}/${PN}
fi
mkdir -p "${CCACHE_DIR}" || die
fi
fi |
Which assigns each package it's own private cache in /var/cache/portage/ccache for better statistics and monitoring.
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logrusx
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Joined: 22 Feb 2018
Posts: 2745
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| Posted: Sun Feb 16, 2025 4:41 pm Post subject: |
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| mi_unixbird wrote: |
As in: “prefix_command_cpp=/usr/local/libexec/ccache_pp_wrapper” with this simply executing “exec "$@" -P” and nothing more. It seems like this change makes a lot of packages which didn't work well with upgrades compile get a high hit ratio. |
Where do you put that?
Best Regards,
Georgi |
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mi_unixbird
Tux's lil' helper
Joined: 24 Jul 2015
Posts: 142
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| Posted: Sun Feb 16, 2025 6:48 pm Post subject: |
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| logrusx wrote: | | mi_unixbird wrote: |
As in: “prefix_command_cpp=/usr/local/libexec/ccache_pp_wrapper” with this simply executing “exec "$@" -P” and nothing more. It seems like this change makes a lot of packages which didn't work well with upgrades compile get a high hit ratio. |
Where do you put that?
Best Regards,
Georgi |
In the /etc/ccache.conf or local per-cache configuration.
https://ccache.dev/manual
The “prefix_command_cpp” option and the configuration style syntax is explained here.
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logrusx
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Joined: 22 Feb 2018
Posts: 2745
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| Posted: Mon Feb 17, 2025 5:33 pm Post subject: |
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Thanks. I almost filled the cache, only a few thousand units remain until the compilation completes. We'll see what happens on the next release. I've never had good results with ccache, but I remain optimistic. No big hoes though.
EIDT: it finished. Cache size is 2.1 Gb. It even had 2 cache hits during the compilation. However I'm disappointed. Three years after they enabled Wayland support and Chromium still does not allow me to select more than 1080p YouTube video quality, while Firefox has been supporting it for quite a while now. I've abandoned Chromium for more than a year and I'm doing this out of curiosity only.
Best Regards,
Georgi |
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logrusx
Advocate
Joined: 22 Feb 2018
Posts: 2745
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| Posted: Thu Feb 20, 2025 10:49 am Post subject: |
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I don't know what I'm doing wrong but I've never got good cache hit ratios with chromium. Some people claimed they sometimes had good rates even without the change you suggested in the past, but I never did. I used ungoogled chromium for this experiment and I terminated it third of the way with abysmal 10% hit rate. Yes, 10% is more than I've ever had, but I don't think it's worth.
This time mesa was pulled in and I enabled cache for it too and I'll see how it does next update.
Best Regards,
Georgi |
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mi_unixbird
Tux's lil' helper
Joined: 24 Jul 2015
Posts: 142
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| Posted: Fri Feb 21, 2025 7:25 pm Post subject: |
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| logrusx wrote: | I don't know what I'm doing wrong but I've never got good cache hit ratios with chromium. Some people claimed they sometimes had good rates even without the change you suggested in the past, but I never did. I used ungoogled chromium for this experiment and I terminated it third of the way with abysmal 10% hit rate. Yes, 10% is more than I've ever had, but I don't think it's worth.
This time mesa was pulled in and I enabled cache for it too and I'll see how it does next update.
Best Regards,
Georgi |
My ccache.conf for chromium looks like this, not sure whether you forgot a setting:
| Code: | # Maximum cache size to maintain
max_size = 5.0G
# Allow others to run 'ebuild' and share the cache.
umask = 002
# Preserve cache across GCC rebuilds and
# introspect GCC changes through GCC wrapper.
compiler_check = %compiler% -dumpversion
# I expect 1.5M files. 300 files per directory.
cache_dir_levels = 3
cache_dir = /var/cache/portage/ccache/www-client/chromium
file_clone=true
depend_mode=false
direct_mode=false
hash_dir=false
run_second_cpp=false |
I don't use the strip preprocessor hack for chromium because it doesn't do anything for it, I only use it for other packages.
The only time i get sub 10% hits is if some kind of fundamental dependency like the compiler itself updated and the entire cache is invalidated. With normal updates it rarely drops below 80%
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keekkenen
n00b
Joined: 05 Oct 2024
Posts: 33
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| Posted: Fri Feb 21, 2025 10:01 pm Post subject: |
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| logrusx wrote: | | Three years after they enabled Wayland support and Chromium still does not allow me to select more than 1080p YouTube video quality, while Firefox has been supporting it for quite a while now. |
It's very strange, I've no problem with 1440p and 2160p in Chromium under plasma with wayland.
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