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parallel: Attempt 3 at fixing https://lists.gnu.org/archive/html/parallel/2020-08/msg00003.html

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Ole Tange 2020-08-20 23:07:56 +02:00
parent 2ed5279f6a
commit 19cd8e015f
4 changed files with 122 additions and 62 deletions
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1
CREDITS
View file

@ -1,5 +1,6 @@
People who have helped GNU Parallel different ways.
Morten Rønne: Donating his old Mac for testing.
Renan Valieris: Maintaining GNU Parallel for Anaconda Cloud.
Jakub Kulík: Maintaining GNU Parallel for Solaris-userland.
Rich Burridge: Maintaining GNU Parallel for Solaris-userland.

63
src/parallel
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@ -2160,7 +2160,7 @@ sub check_invalid_option_combinations() {
sub init_globals() {
# Defaults:
$Global::version = 20200815;
$Global::version = 20200820;
$Global::progname = 'parallel';
$::name = "GNU Parallel";
$Global::infinity = 2**31;
@ -5351,7 +5351,7 @@ sub qqx(@) {
# CygWin does not respect 2>/dev/null
# so we do that by hand
# This trick does not work:
# https://stackoverflow.com/questions/13833088/why-doesnt-local-work-on-stderr-and-stdout
# https://stackoverflow.com/q/13833088/363028
# local *STDERR;
# open(STDERR, ">", "/dev/null");
open(local *CHILD_STDIN, '<', '/dev/null') or die $!;
@ -5370,7 +5370,10 @@ sub qqx(@) {
# Make sure $? is set
waitpid($pid, 0);
return wantarray ? @arr : join "",@arr;
}
} or do {
# If eval fails, force $?=false
`false`;
};
}
}
@ -10481,7 +10484,7 @@ sub slot($) {
{
my $already_spread;
my $env_size;
my $darwin_max_len;
sub populate($) {
# Add arguments from arg_queue until the number of arguments or
@ -10499,6 +10502,28 @@ sub slot($) {
my $next_arg;
my $max_len = $Global::minimal_command_line_length
|| Limits::Command::max_length();
if($^O eq "darwin") {
# env $((260932 - $single - $envc - $envl * 4 + 1064 ))
# Darwin's limit is affected by:
# * number of environment names (variables+functions)
# * size of environment
# * the length of arguments:
# a one-char argument lowers the limit by 5
# To be safe assume all arguments are one-char
# The max_len is cached between runs, but if the size of
# the environment is different we need to recompute the
# usable max length for this run of GNU Parallel
# See https://unix.stackexchange.com/a/604943/2972
if(not $darwin_max_len) {
my $envc = (keys %ENV);
my $envn = length join"",(keys %ENV);
my $envv = length join"",(values %ENV);
$darwin_max_len = 3+($max_len - $envn - $envv) / 5 - $envc*2;
::debug("init",
"length: $darwin_max_len 3+($max_len - $envn - $envv) / 5 - $envc*2");
}
$max_len = $darwin_max_len;
}
if($opt::cat or $opt::fifo) {
# Get the empty arg added by --pipepart (if any)
$Global::JobQueue->{'commandlinequeue'}->{'arg_queue'}->get();
@ -11501,33 +11526,9 @@ sub max_length($) {
sub real_max_length() {
# Find the max_length of a command line
# Returns:
# The maximal command line length
if($^O eq "darwin") {
# env $((-260932 + $envl *4 -1064 + $envc + $single))
# Darwin's limit is affected by:
# * number of environment names (variables+functions)
# * size of environment
# * the length of arguments:
# a one-char argument lowers the limit by 5
# To be safe assume all arguments are one-char
my $max_len = find_max("x");
my $env_size = (keys %ENV) * 4 + length(join'',%ENV);
$max_len -= $env_size;
# Small fudge constant I cannot explain
$max_len -= 1064;
# If all arguments are 1 char, the limit is 5x smaller
$max_len /= 5;
return $max_len;
} else {
return find_max("x");
}
}
sub real_max_args() {
# Find the max number of args allowed on a command line
# Returns:
# The maximal number of args allowed on a command line
return find_max(" x");
# The maximal command line length with 1 byte arguments
# return find_max(" x");
return find_max("x");
}
sub find_max($) {

17
src/parallel.pod
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@ -5192,7 +5192,7 @@ Your bug report should always include:
The error message you get (if any). If the error message is not from
GNU B<parallel> you need to show why you think GNU B<parallel> caused
these.
this.
=item *
@ -5204,15 +5204,16 @@ version.
=item *
A minimal, complete, and verifiable example (See description on
http://stackoverflow.com/help/mcve).
https://stackoverflow.com/help/mcve).
It should be a complete example that others can run that shows the
It should be a complete example that others can run which shows the
problem including all files needed to run the example. This should
preferably be small and simple, so try to remove as many options as
possible. A combination of B<yes>, B<seq>, B<cat>, B<echo>, B<wc>, and
B<sleep> can reproduce most errors. If your example requires large
files, see if you can make them with something like B<seq 100000000> >
B<bigfile> or B<yes | head -n 1000000000> > B<file>.
B<bigfile> or B<yes | head -n 1000000000> > B<file>. If you need
multiple columns: B<paste <(seq 1000) <(seq 1000 1999)>
If your example requires remote execution, see if you can use
B<localhost> - maybe using another login.
@ -5392,9 +5393,9 @@ For remote usage it uses B<rsync> with B<ssh>.
=head1 SEE ALSO
B<ssh>(1), B<ssh-agent>(1), B<sshpass>(1), B<ssh-copy-id>(1),
B<rsync>(1), B<find>(1), B<xargs>(1), B<dirname>(1), B<make>(1),
B<pexec>(1), B<ppss>(1), B<xjobs>(1), B<prll>(1), B<dxargs>(1),
B<mdm>(1)
B<parallel_tutorial>(1), B<env_parallel>(1), B<parset>(1),
B<parsort>(1), B<parallel_alternatives>(1), B<parallel_design>(7),
B<niceload>(1), B<sql>(1), B<ssh>(1), B<ssh-agent>(1), B<sshpass>(1),
B<ssh-copy-id>(1), B<rsync>(1)
=cut

103
testsuite/tests-to-run/parallel-macos.sh
View file

@ -3,103 +3,160 @@
. `which env_parallel.bash`
env_parallel --session
true <<'EOF'
#!/bin/bash
# Find the command line limit formula
# macosx.p = 10.7.5
# El capitan = 10.11.4
. `which binsearch`
doit() {
nfunc=$1
lfunc=$2
lfuncname=$3
nvar=$4
lvar=$5
lvarname=$6
varval="$(perl -e 'print "x "x('$lvar'/2)')"
varname=$(perl -e 'print "x"x'$lvarname)
funcval="$(perl -e 'print "x "x('$lfunc'/2)')"
funcname=$(perl -e 'print "x"x'$lfuncname)
for a in `seq $nvar`; do eval "export v$varname$a='$varval'" ; done
for a in `seq $nfunc`; do eval "f$funcname$a() { $funcval; }" ; done
for a in `seq $nfunc`; do eval "export -f f$funcname$a" ; done
myrun() {
/bin/echo $(perl -e 'print " x"x('$1'/2-5)')
}
export -f myrun
binlen=dummy
binlen=$(binsearch -q myrun)
perl -e '
$envc=(keys %ENV);
$envn=length join"",(keys %ENV);
$envv=length join"",(values %ENV);
$maxlen=3+(262144 - $envn - $envv) / 5 - $envc*2;
print("Max len = $maxlen\n");
$bin='$binlen';
print("$bin=",$bin-$maxlen," $envc $envn $envv\n");
'
}
export -f doit
val="$(seq 2 100 1000)"
val="10 20 50 100 200 500 1000"
val="11 23 57 101 207 503 1007"
parallel --shuf --tag -k doit ::: $val ::: $val ::: $val ::: $val ::: $val ::: $val
EOF
# Each should generate at least 2 commands
par_many_args() {
rm -f ~/.parallel/tmp/sshlogin/*/linelen
pecho() { perl -e 'print "@ARGV\n"' "$@"; }
export -f pecho
gen500k() { yes | head -c 131000; }
geny() { yes | head -c $1; }
for a in `seq 6000`; do eval "export a$a=1" ; done
gen500k | stdout parallel --load 27 -Xkj1 'pecho {} {} {} {} | wc' |
perl -pe 's/\d{10,}.\d+ //g'
geny 10000 | stdout parallel -Xkj1 'pecho {} {} {} {} | wc' |
perl -pe 's/( y){10,}//g'
}
par_many_var() {
export LC_ALL=C
rm -f ~/.parallel/tmp/sshlogin/*/linelen
pecho() { perl -e 'print "@ARGV\n"' "$@"; }
export -f pecho
gen500k() { seq -f %f 1000000000000000 1000000000050000 | head -c 131000; }
gen() { seq -f %f 1000000000000000 1000000000050000 | head -c $1; }
for a in `seq 6000`; do eval "export a$a=1" ; done
gen500k | stdout parallel --load 4 -Xkj1 'pecho {} {} {} {} | wc' |
gen 10000 | stdout parallel -Xkj1 'pecho {} {} {} {} | wc' |
perl -pe 's/\d{10,}.\d+ //g'
}
par_many_var_func() {
export LC_ALL=C
rm -f ~/.parallel/tmp/sshlogin/*/linelen
gen500k() { seq -f %f 1000000000000000 1000000000050000 | head -c 131000; }
gen() { seq -f %f 1000000000000000 1000000000050000 | head -c $1; }
pecho() { perl -e 'print "@ARGV\n"' "$@"; }
export -f pecho
for a in `seq 5000`; do eval "export a$a=1" ; done
for a in `seq 5000`; do eval "a$a() { 1; }" ; done
for a in `seq 5000`; do eval export -f a$a ; done
gen500k | stdout parallel --load 20 -Xkj1 'pecho {} {} {} {} | wc' |
for a in `seq 2000`; do eval "export a$a=1" ; done
for a in `seq 2000`; do eval "a$a() { 1; }" ; done
for a in `seq 2000`; do eval export -f a$a ; done
gen 20000 | stdout parallel -Xkj1 'pecho {} {} {} {} | wc' |
perl -pe 's/\d{10,}.\d+ //g'
}
par_many_func() {
export LC_ALL=C
rm -f ~/.parallel/tmp/sshlogin/*/linelen
gen500k() { seq -f %f 1000000000000000 1000000000050000 | head -c 131000; }
gen() { seq -f %f 1000000000000000 1000000000050000 | head -c $1; }
pecho() { perl -e 'print "@ARGV\n"' "$@"; }
export -f pecho
for a in `seq 5000`; do eval "a$a() { 1; }" ; done
for a in `seq 5000`; do eval export -f a$a ; done
gen500k | stdout parallel --load 5 -Xkj1 'pecho {} {} {} {} | wc' |
gen 10000 | stdout parallel -Xkj1 'pecho {} {} {} {} | wc' |
perl -pe 's/\d{10,}.\d+ //g'
}
par_big_func() {
export LC_ALL=C
rm -f ~/.parallel/tmp/sshlogin/*/linelen
gen500k() { seq -f %f 1000000000000000 1000000000050000 | head -c 131000; }
gen() { seq -f %f 1000000000000000 1000000000050000 | head -c $1; }
pecho() { perl -e 'print "@ARGV\n"' "$@"; }
export -f pecho
big=`seq 1000`
for a in `seq 1`; do eval "a$a() { '$big'; }" ; done
for a in `seq 1`; do eval export -f a$a ; done
gen500k | stdout parallel --load 2 -Xkj1 'pecho {} {} {} {} | wc' |
gen 20000 | stdout parallel --load 2 -Xkj1 'pecho {} {} {} {} | wc' |
perl -pe 's/\d{10,}.\d+ //g'
}
par_many_var_big_func() {
export LC_ALL=C
rm -f ~/.parallel/tmp/sshlogin/*/linelen
gen500k() { seq -f %f 1000000000000000 1000000000050000 | head -c 131000; }
gen() { seq -f %f 1000000000000000 1000000000050000 | head -c $1; }
pecho() { perl -e 'print "@ARGV\n"' "$@"; }
export -f pecho
big=`seq 1000`
for a in `seq 5000`; do eval "export a$a=1" ; done
for a in `seq 10`; do eval "a$a() { '$big'; }" ; done
for a in `seq 10`; do eval export -f a$a ; done
gen500k | stdout parallel --load 5 -Xkj1 'pecho {} {} {} {} | wc' |
gen 10000 | stdout parallel -Xkj1 'pecho {} {} {} {} | wc' |
perl -pe 's/\d{10,}.\d+ //g'
}
par_big_func_name() {
export LC_ALL=C
rm -f ~/.parallel/tmp/sshlogin/*/linelen
gen500k() { seq -f %f 1000000000000000 1000000000050000 | head -c 131000; }
gen() { seq -f %f 1000000000000000 1000000000050000 | head -c $1; }
pecho() { perl -e 'print "@ARGV\n"' "$@"; }
export -f pecho
big=`perl -e print\"x\"x10000`
for a in `seq 10`; do eval "export a$big$a=1" ; done
gen500k | stdout parallel --load 5 -Xkj1 'pecho {} {} {} {} | wc' |
gen 15000 | stdout parallel -Xkj1 'pecho {} {} {} {} | wc' |
perl -pe 's/\d{10,}.\d+ //g'
}
par_big_var_func_name() {
export LC_ALL=C
rm -f ~/.parallel/tmp/sshlogin/*/linelen
gen500k() { seq -f %f 1000000000000000 1000000000050000 | head -c 131000; }
gen() { seq -f %f 1000000000000000 1000000000050000 | head -c $1; }
pecho() { perl -e 'print "@ARGV\n"' "$@"; }
export -f pecho
big=`perl -e print\"x\"x10000`
for a in `seq 10`; do eval "export a$big$a=1" ; done
for a in `seq 10`; do eval "a$big$a() { 1; }" ; done
for a in `seq 10`; do eval export -f a$big$a ; done
gen500k | stdout parallel --load 4 -Xkj1 'pecho {} {} {} {} | wc' |
gen 10000 | stdout parallel --load 4 -Xkj1 'pecho {} {} {} {} | wc' |
perl -pe 's/\d{10,}.\d+ //g'
}
scp /usr/local/bin/parallel macosx.p:bin/
#macsshlogin=ota@mac
macsshlogin=macosx.p
scp /usr/local/bin/parallel $macsshlogin:bin/
export LC_ALL=C
export -f $(compgen -A function | grep par_)
#compgen -A function |
compgen -A function |
grep par_ |
LC_ALL=C sort |
env_parallel --timeout 3000% --tag -k -S macosx.p
env_parallel --timeout 1000% --tag -k -S 6/$macsshlogin 'PATH=$HOME/bin:$PATH; {}'