mirror of
https://git.savannah.gnu.org/git/parallel.git
synced 2024-11-21 21:47:54 +00:00
pod2rst-fix: Work-around some pod2rst conversion errors.
parallel: Fix race condition for --limit 'load'.
This commit is contained in:
Ole Tange
parent
7f73c0fb2c
commit
e40b886a9a
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@ -274,7 +274,9 @@ New in this release:
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News about GNU Parallel:
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Bash: GNU Parallel with Curl https://gist.github.com/CMCDragonkai/5914e02df62137e47f32?permalink_comment_id=2617456
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* Bash: GNU Parallel with Curl https://gist.github.com/CMCDragonkai/5914e02df62137e47f32?permalink_comment_id=2617456
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* The Pipe Operator Explained https://medium.com/geekculture/the-pipe-operator-explained-cbd41e23775a
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<<>>
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@ -246,51 +246,51 @@ parsort.texi: parsort
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|| echo "Warning: pod2texi not found. Using old parsort.texi"
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parallel.rst: parallel.pod
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pod2rst --outfile "$(srcdir)"/parallel.rst --infile="$(srcdir)"/parallel.pod \
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./pod2rst-fix < "$(srcdir)"/parallel.pod > "$(srcdir)"/parallel.rst \
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|| echo "Warning: pod2rst not found. Using old parallel.rst"
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env_parallel.rst: env_parallel.pod
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pod2rst --outfile "$(srcdir)"/env_parallel.rst --infile="$(srcdir)"/env_parallel.pod \
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./pod2rst-fix < "$(srcdir)"/env_parallel.pod > "$(srcdir)"/env_parallel.rst \
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|| echo "Warning: pod2rst not found. Using old env_parallel.rst"
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parallel_tutorial.rst: parallel_tutorial.pod
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pod2rst --outfile "$(srcdir)"/parallel_tutorial.rst --infile="$(srcdir)"/parallel_tutorial.pod \
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./pod2rst-fix < "$(srcdir)"/parallel_tutorial.pod > "$(srcdir)"/parallel_tutorial.rst \
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|| echo "Warning: pod2rst not found. Using old parallel_tutorial.rst"
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parallel_book.rst: parallel_book.pod
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pod2rst --outfile "$(srcdir)"/parallel_book.rst --infile="$(srcdir)"/parallel_book.pod \
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./pod2rst-fix "$(srcdir)"/parallel_book.pod > "$(srcdir)"/parallel_book.rst \
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|| echo "Warning: pod2rst not found. Using old parallel_book.rst"
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parallel_design.rst: parallel_design.pod
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pod2rst --outfile "$(srcdir)"/parallel_design.rst --infile="$(srcdir)"/parallel_design.pod \
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./pod2rst-fix "$(srcdir)"/parallel_design.pod > "$(srcdir)"/parallel_design.rst \
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|| echo "Warning: pod2rst not found. Using old parallel_design.rst"
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parallel_alternatives.rst: parallel_alternatives.pod
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pod2rst --outfile "$(srcdir)"/parallel_alternatives.rst --infile="$(srcdir)"/parallel_alternatives.pod \
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./pod2rst-fix "$(srcdir)"/parallel_alternatives.pod > "$(srcdir)"/parallel_alternatives.rst \
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|| echo "Warning: pod2rst not found. Using old parallel_alternatives.rst"
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sem.rst: sem.pod
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pod2rst --outfile "$(srcdir)"/sem.rst --infile="$(srcdir)"/sem.pod \
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./pod2rst-fix "$(srcdir)"/sem.pod > "$(srcdir)"/sem.rst \
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|| echo "Warning: pod2rst not found. Using old sem.rst"
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sql.rst: sql
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pod2rst --outfile "$(srcdir)"/sql.rst --infile="$(srcdir)"/sql \
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./pod2rst-fix "$(srcdir)"/sql > "$(srcdir)"/sql.rst \
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|| echo "Warning: pod2rst not found. Using old sql.rst"
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niceload.rst: niceload.pod
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pod2rst --outfile "$(srcdir)"/niceload.rst --infile="$(srcdir)"/niceload.pod \
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./pod2rst-fix "$(srcdir)"/niceload.pod > "$(srcdir)"/niceload.rst \
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|| echo "Warning: pod2rst not found. Using old niceload.rst"
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parcat.rst: parcat.pod
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pod2rst --outfile "$(srcdir)"/parcat.rst --infile="$(srcdir)"/parcat.pod \
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./pod2rst-fix "$(srcdir)"/parcat.pod > "$(srcdir)"/parcat.rst \
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|| echo "Warning: pod2rst not found. Using old parcat.rst"
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parset.rst: parset.pod
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pod2rst --outfile "$(srcdir)"/parset.rst --infile="$(srcdir)"/parset.pod \
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./pod2rst-fix "$(srcdir)"/parset.pod > "$(srcdir)"/parset.rst \
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|| echo "Warning: pod2rst not found. Using old parset.rst"
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parsort.rst: parsort
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pod2rst --outfile "$(srcdir)"/parsort.rst --infile="$(srcdir)"/parsort \
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./pod2rst-fix "$(srcdir)"/parsort > "$(srcdir)"/parsort.rst \
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|| echo "Warning: pod2rst not found. Using old parsort.rst"
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parallel.pdf: parallel.pod
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35
src/parallel
35
src/parallel
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@ -3819,7 +3819,7 @@ sub progress() {
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($Global::host{$w}->ncpus() || "-")." / ".
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$Global::host{$w}->max_jobs_running()."\n";
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}
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$status = "x"x($termcols+1);
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$status = "c"x($termcols+1);
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# Select an output format that will fit on a single line
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if(length $status > $termcols) {
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# sshlogin1:XX/XX/XX%/XX.Xs s2:XX/XX/XX%/XX.Xs s3:XX/XX/XX%/XX.Xs
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@ -6868,8 +6868,7 @@ sub limit($) {
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wc -l |
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perl -ne 'exit ('$limit' < $_)';
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};
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export -f load;
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load %s;
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load %s
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!,
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);
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my ($cmd,@args) = split /\s+/,$opt::limit;
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@ -6908,9 +6907,9 @@ sub swap_activity($) {
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my $self = shift;
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# Should we update the swap_activity file?
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my $update_swap_activity_file = 0;
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if(-r $self->{'swap_activity_file'}) {
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open(my $swap_fh, "<", $self->{'swap_activity_file'}) ||
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::die_bug("swap_activity_file-r");
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# Test with (on 64 core machine):
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# seq 100 | parallel --lb -j100 'seq 1000 | parallel --noswap -j 1 true'
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if(open(my $swap_fh, "<", $self->{'swap_activity_file'})) {
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my $swap_out = <$swap_fh>;
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close $swap_fh;
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if($swap_out =~ /^(\d+)$/) {
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@ -9556,28 +9555,34 @@ sub sshlogin_wrap($) {
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$script = $tmpdir."/par".
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join"", map { (0..9,"a".."z","A".."Z")[rand(62)] } (1..5);
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} while(-e $script);
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# Create a script from the hex code
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# that removes itself and runs the commands
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open($fh,">",$script) || die;
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# \040 = space - but we remove spaces in the script
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# ' needed due to rc-shell
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print($fh("rm\040\'$script\'\n",$bashfunc.$cmd));
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close $fh;
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my $parent = getppid;
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my $done = 0;
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$SIG{CHLD} = sub { $done = 1; };
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$pid = fork;
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unless($pid) {
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# Make own process group to be able to kill HUP it later
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eval { setpgrp };
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# Set nice value
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eval { setpriority(0,0,$nice) };
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# Run the script
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exec($shell,$script);
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die("exec\040failed: $!");
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}
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my $parent = getppid;
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do {
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while((not $done) and (getppid == $parent)) {
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# Parent pid is not changed, so sshd is alive
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# Exponential sleep up to 1 sec
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$s = $s < 1 ? 0.001 + $s * 1.03 : $s;
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select(undef, undef, undef, $s);
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} until ($done || getppid != $parent);
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}
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if(not $done) {
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# sshd is dead: User pressed Ctrl-C
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# Kill as per --termseq
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my @term_seq = split/,/,$termseq;
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if(not @term_seq) {
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@ -11580,11 +11585,11 @@ sub results_out($) {
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my $upper = 100_000_000;
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# Dir length of 8 chars is supported everywhere
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my $len = 8;
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my $dir = "x"x$len;
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my $dir = "d"x$len;
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do {
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rmdir($testdir."/".$dir);
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$len *= 16;
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$dir = "x"x$len;
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$dir = "d"x$len;
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} while ($len < $upper and mkdir $testdir."/".$dir);
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# Then search for the actual max length between $len/16 and $len
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my $min = $len/16;
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@ -11593,7 +11598,7 @@ sub results_out($) {
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# If we are within 5 chars of the exact value:
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# it is not worth the extra time to find the exact value
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my $test = int(($min+$max)/2);
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$dir = "x"x$test;
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$dir = "d"x$test;
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if(mkdir $testdir."/".$dir) {
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rmdir($testdir."/".$dir);
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$min = $test;
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@ -12416,8 +12421,8 @@ sub real_max_length() {
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# Find the max_length of a command line
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# Returns:
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# The maximal command line length with 1 byte arguments
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# return find_max(" x");
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return find_max("x");
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# return find_max(" c");
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return find_max("c");
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}
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sub find_max($) {
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@ -12507,7 +12512,7 @@ sub tmux_length($) {
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my $tmpfile = ::tmpname("tms");
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my $tmuxcmd = $ENV{'PARALLEL_TMUX'}.
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" -S $tmpfile new-session -d -n echo $l".
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("x"x$l). " && echo $l; rm -f $tmpfile";
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("t"x$l). " && echo $l; rm -f $tmpfile";
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push @out, ::qqx($tmuxcmd);
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::rm($tmpfile);
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}
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@ -1854,7 +1854,7 @@ where records end.
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=back
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See also: <--pipe> B<--recstart> B<--recend> B<--arg-file> B<::::>
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See also: B<--pipe> B<--recstart> B<--recend> B<--arg-file> B<::::>
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=item B<--plain>
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@ -4763,7 +4763,11 @@ transfers files. B<outrun> must be installed on the remote system.
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You can use B<outrun> in an sshlogin this way:
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parallel -S 'outrun user@server eval' command
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parallel -S 'outrun user@server' command
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or:
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parallel --ssh outrun -S server command
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=head2 EXAMPLE: Slurm cluster
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@ -5981,10 +5985,11 @@ installed software that is not in the VirtualBox images.
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If you cannot reproduce the error on any of the VirtualBox images
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above, see if you can build a VirtualBox image on which you can
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reproduce the error. If not you should assume the debugging will be
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done through you. That will put more burden on you and it is extra
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important you give any information that help. In general the problem
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will be fixed faster and with less work for you if you can reproduce
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the error on a VirtualBox.
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done through you. That will put a lot more burden on you and it is
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extra important you give any information that help. In general the
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problem will be fixed faster and with much less work for you if you
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can reproduce the error on a VirtualBox - even if you have to build a
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VirtualBox image.
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=head2 In summary
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@ -221,7 +221,7 @@ B<rsync>s to talk to version 2.5.7.
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=head2 Compression
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GNU B<parallel> buffers output in temporary files. B<--compress>
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GNU B<parallel> buffers output in temporary files. B<--compress>
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compresses the buffered data. This is a bit tricky because there
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should be no files to clean up if GNU B<parallel> is killed by a power
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outage.
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@ -617,11 +617,12 @@ unlinked as soon as they are opened.
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The shell shock bug in B<bash> did not affect GNU B<parallel>, but the
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solutions did. B<bash> first introduced functions in variables named:
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I<BASH_FUNC_myfunc()> and later changed that to I<BASH_FUNC_myfunc%%>. When
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transferring functions GNU B<parallel> reads off the function and changes
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that into a function definition, which is copied to the remote system and
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executed before the actual command is executed. Therefore GNU B<parallel>
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needs to know how to read the function.
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I<BASH_FUNC_myfunc()> and later changed that to
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I<BASH_FUNC_myfunc%%>. When transferring functions GNU B<parallel>
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reads off the function and changes that into a function definition,
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which is copied to the remote system and executed before the actual
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command is executed. Therefore GNU B<parallel> needs to know how to
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read the function.
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From version 20150122 GNU B<parallel> tries both the ()-version and
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the %%-version, and the function definition works on both pre- and
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@ -633,6 +634,28 @@ post-shell shock versions of B<bash>.
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The remote system wrapper does some initialization before starting the
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command on the remote system.
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=head3 Make quoting unnecessary by hex encoding everything
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When you run B<ssh server foo> then B<foo> has to be quoted once:
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ssh server "echo foo; echo bar"
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If you run B<ssh server1 ssh server2 foo> then B<foo> has to be quoted
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twice:
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ssh server1 ssh server2 \'"echo foo; echo bar"\'
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GNU B<parallel> avoids this by packing everyting into hex values and
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running a command that does not need quoting:
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perl -X -e GNU_Parallel_worker,eval+pack+q/H10000000/,join+q//,@ARGV
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This command reads hex from the command line and converts that to
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bytes that are then eval'ed as a Perl expression.
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The string B<GNU_Parallel_worker> is not needed. It is simply there to
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let the user know, that this process is GNU B<parallel> working.
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=head3 Ctrl-C and standard error (stderr)
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If the user presses Ctrl-C the user expects jobs to stop. This works
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@ -668,44 +691,78 @@ B<nice>ing the remote process is done by B<setpriority(0,0,$nice)>. A
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few old systems do not implement this and B<--nice> is unsupported on
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those.
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=head3 Setting $PARALLEL_TMP
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B<$PARALLEL_TMP> is used by B<--fifo> and B<--cat> and must point to a
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non-exitent file in B<$TMPDIR>. This file name is computed on the
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remote system.
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=head3 The wrapper
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The wrapper looks like this:
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$shell = $PARALLEL_SHELL || $SHELL;
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$tmpdir = $TMPDIR;
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$tmpdir = $TMPDIR || $PARALLEL_REMOTE_TMPDIR;
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$nice = $opt::nice;
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$termseq = $opt::termseq;
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# Check that $tmpdir is writable
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-w $tmpdir ||
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die("$tmpdir is not writable.".
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" Set PARALLEL_REMOTE_TMPDIR");
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# Set $PARALLEL_TMP to a non-existent file name in $TMPDIR
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do {
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$ENV{PARALLEL_TMP} = $tmpdir."/par".
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join"", map { (0..9,"a".."z","A".."Z")[rand(62)] } (1..5);
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} while(-e $ENV{PARALLEL_TMP});
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# Set $script to a non-existent file name in $TMPDIR
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do {
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$script = $tmpdir."/par".
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join"", map { (0..9,"a".."z","A".."Z")[rand(62)] } (1..5);
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} while(-e $script);
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# Create a script from the hex code
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# that removes itself and runs the commands
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open($fh,">",$script) || die;
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# ' needed due to rc-shell
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print($fh("rm \'$script\'\n",$bashfunc.$cmd));
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close $fh;
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my $parent = getppid;
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my $done = 0;
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$SIG{CHLD} = sub { $done = 1; };
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$pid = fork;
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unless($pid) {
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# Make own process group to be able to kill HUP it later
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setpgrp;
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eval { setpgrp };
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# Set nice value
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eval { setpriority(0,0,$nice) };
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exec $shell, "-c", ($bashfunc."@ARGV");
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die "exec: $!\n";
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# Run the script
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exec($shell,$script);
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die("exec failed: $!");
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}
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do {
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# Parent is not init (ppid=1), so sshd is alive
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while((not $done) and (getppid == $parent)) {
|
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# Parent pid is not changed, so sshd is alive
|
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# Exponential sleep up to 1 sec
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$s = $s < 1 ? 0.001 + $s * 1.03 : $s;
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select(undef, undef, undef, $s);
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} until ($done || getppid == 1);
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# Kill HUP the process group if job not done
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kill(SIGHUP, -${pid}) unless $done;
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}
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if(not $done) {
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# sshd is dead: User pressed Ctrl-C
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# Kill as per --termseq
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my @term_seq = split/,/,$termseq;
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if(not @term_seq) {
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@term_seq = ("TERM",200,"TERM",100,"TERM",50,"KILL",25);
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}
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while(@term_seq && kill(0,-$pid)) {
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kill(shift @term_seq, -$pid);
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select(undef, undef, undef, (shift @term_seq)/1000);
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}
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}
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wait;
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exit ($?&127 ? 128+($?&127) : 1+$?>>8)
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=head2 Transferring of variables and functions
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Transferring of variables and functions given by B<--env> is done by
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@ -728,9 +785,9 @@ into one single word, which often is longer than 1024 chars.
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When the line to run is > 1000 chars, GNU B<parallel> therefore
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encodes the line to run. The encoding B<bzip2>s the line to run,
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converts this to base64, splits the base64 into 1000 char blocks (so B<csh>
|
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does not fail), and prepends it with this Perl script that decodes,
|
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decompresses and B<eval>s the line.
|
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converts this to base64, splits the base64 into 1000 char blocks (so
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B<csh> does not fail), and prepends it with this Perl script that
|
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decodes, decompresses and B<eval>s the line.
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@GNU_Parallel=("use","IPC::Open3;","use","MIME::Base64");
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eval "@GNU_Parallel";
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@ -954,7 +1011,7 @@ N+1 records.
|
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|
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With B<--pipepart> GNU B<parallel> can compute the B<--block-size>
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||||
automatically. A B<--block-size> of B<-1> will use a block size so
|
||||
that each jobslot will receive approximately 1 block. B<--block -2>
|
||||
that each jobslot will receive approximately 1 block. B<--block -2>
|
||||
will pass 2 blocks to each jobslot and B<-I<n>> will pass I<n> blocks
|
||||
to each jobslot.
|
||||
|
||||
|
|
@ -1142,12 +1199,12 @@ the whole output of a single job and save it as csv/tsv or SQL.
|
|||
|
||||
=head2 Argument separators ::: :::: :::+ ::::+
|
||||
|
||||
The argument separator B<:::> was chosen because I have never seen B<:::>
|
||||
used in any command. The natural choice B<--> would be a bad idea since
|
||||
it is not unlikely that the template command will contain B<-->. I have
|
||||
seen B<::> used in programming languanges to separate classes, and I
|
||||
did not want the user to be confused that the separator had anything
|
||||
to do with classes.
|
||||
The argument separator B<:::> was chosen because I have never seen
|
||||
B<:::> used in any command. The natural choice B<--> would be a bad
|
||||
idea since it is not unlikely that the template command will contain
|
||||
B<-->. I have seen B<::> used in programming languanges to separate
|
||||
classes, and I did not want the user to be confused that the separator
|
||||
had anything to do with classes.
|
||||
|
||||
|
||||
B<:::> also makes a visual separation, which is good if there are
|
||||
|
|
@ -1400,14 +1457,4 @@ So to lessen the frustration and the resulting support, B<--tollef>
|
|||
was obsoleted 20130222 and removed one year later.
|
||||
|
||||
|
||||
=head2 Transferring of variables and functions
|
||||
|
||||
Until 20150122 variables and functions were transferred by looking at
|
||||
$SHELL to see whether the shell was a B<*csh> shell. If so the
|
||||
variables would be set using B<setenv>. Otherwise they would be set
|
||||
using B<=>. This caused the content of the variable to be repeated:
|
||||
|
||||
echo $SHELL | grep "/t\{0,1\}csh" > /dev/null && setenv VAR foo ||
|
||||
export VAR=foo
|
||||
|
||||
=cut
|
||||
|
|
|
|||
88
src/pod2rst-fix
Executable file
88
src/pod2rst-fix
Executable file
|
|
@ -0,0 +1,88 @@
|
|||
#!/usr/bin/perl
|
||||
|
||||
# Copyright (C) 2007-2022 Ole Tange, http://ole.tange.dk and Free
|
||||
# Software Foundation, Inc.
|
||||
#
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful, but
|
||||
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
# General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program; if not, see <https://www.gnu.org/licenses/>
|
||||
# or write to the Free Software Foundation, Inc., 51 Franklin St,
|
||||
# Fifth Floor, Boston, MA 02110-1301 USA
|
||||
#
|
||||
# SPDX-FileCopyrightText: 2021-2022 Ole Tange, http://ole.tange.dk and Free Software and Foundation, Inc.
|
||||
# SPDX-License-Identifier: GPL-3.0-or-later
|
||||
|
||||
# This fixes problems in pod2rst conversion
|
||||
|
||||
# Conversion errors:
|
||||
|
||||
# Fixed:
|
||||
# ... B<foo>
|
||||
# bar
|
||||
|
||||
# Fixed:
|
||||
# =item - - a
|
||||
|
||||
# Not fixed (RST does not support Bold-Italic):
|
||||
# B<cat | xargs -d "\n" -n1 I<command>>
|
||||
|
||||
sub pipefunc {
|
||||
my $func = pop;
|
||||
|
||||
my $pid = open(my $kid_to_read, "-|");
|
||||
defined($pid) || die "can't fork: $!";
|
||||
if ($pid) {
|
||||
open STDIN, "<&", $kid_to_read or die;
|
||||
&$func();
|
||||
} else { # child
|
||||
close $kid_to_read;
|
||||
if($_[1]) {
|
||||
# More than one function remaining: Recurse
|
||||
pipefunc(@_);
|
||||
} else {
|
||||
# Only one function remaining: Run it
|
||||
$func = pop;
|
||||
&$func();
|
||||
}
|
||||
exit 0;
|
||||
}
|
||||
}
|
||||
|
||||
sub pre {
|
||||
# Remove comments
|
||||
$_=join("", grep { ! /^#/ } <>);
|
||||
# join lines in each paragraph
|
||||
s/(\S)\n(\S)/$1 $2/g;
|
||||
# quote -
|
||||
s/^=item -/=item \001/gm;
|
||||
print $_;
|
||||
}
|
||||
|
||||
sub pod2rst {
|
||||
exec "pod2rst";
|
||||
}
|
||||
|
||||
sub post {
|
||||
while(<STDIN>) {
|
||||
# =item in =item
|
||||
s/- \\[*]/- /;
|
||||
# B<*.log>
|
||||
s/\\\\[*]/\\*/g;
|
||||
# - -
|
||||
s/^-(\s+)\001/-$1\\-/g;
|
||||
print;
|
||||
}
|
||||
}
|
||||
|
||||
# stdin | pre() | pod2rst() | post()
|
||||
pipefunc(*pre,*pod2rst,*post);
|
||||
|
||||
|
|
@ -865,7 +865,6 @@ par_results_json() {
|
|||
perl -pe 's/\d+\.\d{3}/9.999/g'
|
||||
}
|
||||
|
||||
|
||||
par_testquote() {
|
||||
testquote() {
|
||||
printf '"#&/\n()*=?'"'" |
|
||||
|
|
|
|||
|
|
@ -8,6 +8,21 @@
|
|||
seq 12 |
|
||||
stdout parallel --nice 11 --timeout 10 -j0 -N0 "bzip2 < /dev/zero" > /dev/null &
|
||||
|
||||
par_limit_load() {
|
||||
force_load_to_6() {
|
||||
burn() { bzip2 -9 </dev/zero >/dev/null; }
|
||||
export -f burn
|
||||
parallel --timeout 5 -j0 --nice 19 burn ::: 1 2 3 4 5 6 2>/dev/null
|
||||
}
|
||||
force_load_to_6 &
|
||||
# Give load time to start
|
||||
sleep 1
|
||||
# This should only start after the load stops
|
||||
# and thus take > 4 sec
|
||||
stdout /usr/bin/time -f %e parallel --limit "load 4" sleep ::: 0.8 |
|
||||
perl -ne 'print $_ > 5 ? "OK\n" : "Broken: $_\n"'
|
||||
}
|
||||
|
||||
par_load_more_10s() {
|
||||
echo '### Test --load locally - should take >10s'
|
||||
stdout /usr/bin/time -f %e parallel --load 10 sleep ::: 1 |
|
||||
|
|
|
|||
|
|
@ -1,3 +1,4 @@
|
|||
par_limit_load OK
|
||||
par_load_file_less_10s ### Test --load read from a file - less than 10s
|
||||
par_load_file_less_10s OK
|
||||
par_load_file_more_10s ### Test --load read from a file - more than 10s
|
||||
|
|
|
|||
Loading…
Reference in a new issue