mirror of
https://git.savannah.gnu.org/git/parallel.git
synced 2024-10-18 12:59:39 +00:00
43 lines
1.8 KiB
Bash
Executable file
43 lines
1.8 KiB
Bash
Executable file
#!/bin/bash
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echo '### Test bug https://savannah.gnu.org/bugs/index.php?33352'
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# produce input slowly to parallel so that it will reap a process
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# while blocking in read()
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# Having found the solution it is suddenly very easy to reproduce the
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# problem - even on other hardware:
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#
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# perl -e '@x=1 .. 17000; for(1..30) { print "@x\n"}' | pv -qL 200000
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# |parallel -j2 --pipe --keeporder --block 150000 cat | md5sum
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#
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# This gives different md5sums for each run.
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#
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# The problem is that read(STDIN) is being interrupted by a dead
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# child. The chance of this happening is very small if there are few
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# children dying or read(STDIN) never has to wait for data.
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#
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# The test above forces data to arrive slowly (using pv) which causes
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# read(STDIN) to take a long time - thus being interrupted by a dead
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# child.
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MD5=md5sum
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PAR="parallel -j2 --pipe --keeporder --block 150000 --tmpdir=/dev/shm"
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perl -e '@x=1 .. 17000; for(1..100) { print "@x\n"}' | md5sum
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nice nice perl -e '@x=1 .. 17000; for(1..100) { print "@x\n"}' | pv -qL 1000000 | \
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$PAR cat | md5sum &
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nice nice perl -e '@x=1 .. 17000; for(1..100) { print "@x\n"}' | pv -qL 1000000 | \
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$PAR --recend '' cat | md5sum &
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nice nice perl -e '@x=1 .. 17000; for(1..100) { print "@x\n"}' | pv -qL 1000000 | \
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$PAR --recend '' --files cat | parallel -Xj1 cat {} ';' rm {} | md5sum &
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nice nice perl -e '@x=1 .. 17000; for(1..100) { print "@x\n"}' | pv -qL 1000000 | \
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$PAR --recend '' --files cat | parallel -Xj1 cat {} ';' rm {} | md5sum &
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nice nice perl -e '@x=1 .. 17000; for(1..100) { print "@x\n"}' | pv -qL 1000000 | \
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$PAR --recend '' --files --tmpdir /dev/shm cat | parallel -Xj1 cat {} ';' rm {} | md5sum &
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nice nice perl -e '@x=1 .. 17000; for(1..100) { print "@x\n"}' | pv -qL 1000000 | \
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$PAR --recend '' --files --halt-on-error 2 cat | parallel -Xj1 cat {} ';' rm {} | md5sum &
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wait
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