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warn when requesting decompression with multiple threads

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restore #2918 fix
This commit is contained in:
Yann Collet
2025-03-10 22:46:33 -07:00
parent f9a6031963
commit c583c2c39e
3 changed files with 31 additions and 11 deletions
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10
tests/cli-tests/compression/multi-threaded.sh
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@ -10,3 +10,13 @@ zstd -T0 -f file -q ; zstd -t file.zst
zstd -T0 --auto-threads=logical -f file -q ; zstd -t file.zst
zstd -T0 --auto-threads=physical -f file -q ; zstd -t file.zst
zstd -T0 --jobsize=1M -f file -q ; zstd -t file.zst
# multi-thread decompression warning test
zstd -T0 -f file -q ; zstd -t file.zst; zstd -T0 -d file.zst -o file3
zstd -T0 -f file -q ; zstd -t file.zst; zstd -T2 -d file.zst -o file4
# setting multi-thread via environment variable does not trigger decompression warning
zstd -T0 -f file -q ; zstd -t file.zst; ZSTD_NBTHREADS=0 zstd -df file.zst -o file3
zstd -T0 -f file -q ; zstd -t file.zst; ZSTD_NBTHREADS=2 zstd -df file.zst -o file4
# setting nbThreads==1 does not trigger decompression warning
zstd -T0 -f file -q ; zstd -t file.zst; zstd -T1 -df file.zst -o file3
zstd -T0 -f file -q ; zstd -t file.zst; zstd -T2 -T1 -df file.zst -o file4

14
tests/cli-tests/compression/multi-threaded.sh.stderr.exact
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@ -5,3 +5,17 @@ file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes
Warning : decompression does not support multi-threading
file.zst : 65537 bytes
file.zst : 65537 bytes
Warning : decompression does not support multi-threading
file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes
file.zst : 65537 bytes