Public bug reported:
on resolute, autopkgtests for pristine-tar fail when running
test_recompress.sh
specifically, the test in question calls:
try_with_and_without_recompress() {
tarball="$1"
name="$(basename "$tarball")"
cp $SAMPLES/$tarball .
silent_run pristine-tar gendelta $name regular.delta
silent_run pristine-tar --recompress gendelta $name compressed.delta
regular_delta_size=$(get_size regular.delta)
compressed_delta_size=$(get_size compressed.delta)
}
$tarball in this case is
test/samples/tarballs/plasmidomics_0.2.0.orig.tar.gz
On s390x the 'compressed.delta' often is _not_ smaller than the original
delta. A simple reproducer using `pristine-tar` 1.50+nmu2build2 compiled
with zlib1g-dev 1:1.3.dfsg+really1.3.1-1ubuntu1 (what is currently in
resolute as of 20260122) is attached. on an s390x system
./many_compressions.sh 1000 ./plasmidomics_0.2.0.orig.tar.gz | tee
many_compressions.log
checking the log for failures resulted in:
grep "FAIL" ./many_compressions.log | wc -l
534
This may be related to the following change or current s390x baseline
and hardware compression:
- Compile with DFLTCC enabled on s390x and
hardware compression at level 6
relevant test failure
https://autopkgtest.ubuntu.com/results/autopkgtest-
resolute/resolute/s390x/p/pristine-tar/20260121_191155_d2c51@/log.gz
** Affects: pristine-tar (Ubuntu)
Importance: Undecided
Status: New
** Affects: zlib (Ubuntu)
Importance: Undecided
Status: New
** Affects: pristine-tar (Ubuntu Resolute)
Importance: Undecided
Status: New
** Affects: zlib (Ubuntu Resolute)
Importance: Undecided
Status: New
** Tags: update-excuse
** Attachment added: "many_compresses.sh"
https://bugs.launchpad.net/bugs/2138882/+attachment/5940368/+files/many_compresses.sh
** Also affects: pristine-tar (Ubuntu Resolute)
Importance: Undecided
Status: New
** Also affects: zlib (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
on resolute, autopkgtests for pristine-tar fail when running
test_recompress.sh
specifically, the test in question calls:
try_with_and_without_recompress() {
- tarball="$1"
- name="$(basename "$tarball")"
- cp $SAMPLES/$tarball .
- silent_run pristine-tar gendelta $name regular.delta
- silent_run pristine-tar --recompress gendelta $name compressed.delta
- regular_delta_size=$(get_size regular.delta)
- compressed_delta_size=$(get_size compressed.delta)
+ tarball="$1"
+ name="$(basename "$tarball")"
+ cp $SAMPLES/$tarball .
+ silent_run pristine-tar gendelta $name regular.delta
+ silent_run pristine-tar --recompress gendelta $name compressed.delta
+ regular_delta_size=$(get_size regular.delta)
+ compressed_delta_size=$(get_size compressed.delta)
}
$tarball in this case is
test/samples/tarballs/plasmidomics_0.2.0.orig.tar.gz
On s390x the 'compressed.delta' often is _not_ smaller than the original
- delta. See a simple reproduced using `pristine-tar` 1.50+nmu2build2
- compiled with zlib1g-dev 1:1.3.dfsg+really1.3.1-1ubuntu1 (what is
- currently in resolute as of 20260122).
+ delta. A simple reproducer using `pristine-tar` 1.50+nmu2build2 compiled
+ with zlib1g-dev 1:1.3.dfsg+really1.3.1-1ubuntu1 (what is currently in
+ resolute as of 20260122) is attached. on an s390x system
+
+ ./many_compressions.sh 1000 ./plasmidomics_0.2.0.orig.tar.gz | tee
+ many_compressions.log
+
+ checking the log for failures resulted in:
+
+ grep "FAIL" ./many_compressions.log | wc -l
+ 534
This may be related to the following change or current s390x baseline
and hardware compression:
- Compile with DFLTCC enabled on s390x and
- hardware compression at level 6
+ hardware compression at level 6
relevant test failure
https://autopkgtest.ubuntu.com/results/autopkgtest-
resolute/resolute/s390x/p/pristine-tar/20260121_191155_d2c51@/log.gz
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https://bugs.launchpad.net/bugs/2138882
Title:
[autopkgtest][resolute] s390x Test Failures on test_recompress.sh
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