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Manually prune CI ccache.

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Since ccache in Cirrus currently does not preserve timestamps the
timestamp-based cache pruning implemented by ccache likely would just
remove random files. To work around this, this patch implements a manual
pruning step. This step runs after the build so that at least the files
used in the build should have their timestamps updated. We can then
force eviction of some of the unused files from the cache by cleaning
the cache with a size less than the maximum cache size.
This commit is contained in:
Benjamin Bannier 2023-03-07 12:02:57 +01:00
parent 117d25dcd8
commit b3cd1c5215
1 changed files with 8 additions and 0 deletions
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8
.cirrus.yml
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@ -113,6 +113,9 @@ ci_template: &CI_TEMPLATE
type: text/html type: text/html
cache_statistics_script: cache_statistics_script:
ccache --show-stats ccache --show-stats
ccache_prune_script:
# Evit some of the cached build artifacts not used in this build.
CCACHE_MAXSIZE=${ZEEK_CCACHE_PRUNE_SIZE} ccache -c
env: env:
CIRRUS_WORKING_DIR: /zeek CIRRUS_WORKING_DIR: /zeek
@ -148,6 +151,11 @@ env:
CCACHE_MAXSIZE: 1000M CCACHE_MAXSIZE: 1000M
CCACHE_MAXFILES: 20000 CCACHE_MAXFILES: 20000
# Size to use when manually pruning the cache below. This size should be
# roughly `CCACHE_MAXSIZE - <build_size>`. This works around
# https://github.com/cirruslabs/cirrus-ci-agent/issues/277.
ZEEK_CCACHE_PRUNE_SIZE: 700M
# Increase this to flush the ccache cache. Mainly useful until there's # Increase this to flush the ccache cache. Mainly useful until there's
# a solution for the mtime pruning above. # a solution for the mtime pruning above.
ZEEK_CCACHE_EPOCH: 2 ZEEK_CCACHE_EPOCH: 2