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parallel: --number-of-cores now respects 'taskset'.

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Ole Tange 2015-02-23 22:32:34 +01:00
parent 72819bdcba
commit e22467f4dd
5 changed files with 120 additions and 82 deletions
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4
NEWS
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@ -22,7 +22,7 @@
Experiments for Identifying Recommender Differences Experiments for Identifying Recommender Differences
http://elehack.net/research/thesis/mde-thesis.pdf http://elehack.net/research/thesis/mde-thesis.pdf
* GNU Parallel was using (unfortunately with wrong citation) in: * GNU Parallel was used (unfortunately with wrong citation) in:
Performance and Scaling Comparison Study of RDBMS and NoSQL Performance and Scaling Comparison Study of RDBMS and NoSQL
(MongoDB) (MongoDB)
http://ijact.in/wp-content/uploads/2014/11/COMPUSOFT-311-1270-1275.pdf http://ijact.in/wp-content/uploads/2014/11/COMPUSOFT-311-1270-1275.pdf
@ -37,7 +37,7 @@
http://biorxiv.org/content/biorxiv/early/2014/12/05/012179.full.pdf http://biorxiv.org/content/biorxiv/early/2014/12/05/012179.full.pdf
* Zip Folders with GNU Parallel * Zip Folders with GNU Parallel
http://fazky.github.io/Linux/2015-01-07-GNU-Parallel.html http://fazky.github.io/posts/Linux/2015-01-07-GNU-Parallel.html
* Using GNU Parallel with Freesurfer * Using GNU Parallel with Freesurfer
http://programminginadarkroom.blogspot.dk/2015/02/using-gnu-parallel-with-freesurfer.html http://programminginadarkroom.blogspot.dk/2015/02/using-gnu-parallel-with-freesurfer.html

35
doc/release_new_version
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@ -208,44 +208,21 @@ cc:Tim Cuthbertson <tim3d.junk@gmail.com>,
Ryoichiro Suzuki <ryoichiro.suzuki@gmail.com>, Ryoichiro Suzuki <ryoichiro.suzuki@gmail.com>,
Jesse Alama <jesse.alama@gmail.com> Jesse Alama <jesse.alama@gmail.com>
Subject: GNU Parallel 20150222 (' (((:~{> Krudttønden') released Subject: GNU Parallel 20150322 ('') released
GNU Parallel 20150222 (' (((:~{> Krudttønden') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/ GNU Parallel 20150322 ('') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/
Haiku of the month: Haiku of the month:
xargs' space and quote <<>>
headache causing behaviour.
Use GNU Parallel
-- Ole Tange
New in this release: New in this release:
* --tmux has gotten a major overhaul. * GNU Parallel was cited in: RIG: Recalibration and Interrelation of genomic sequence data with the GATK http://www.g3journal.org/content/early/2015/02/13/g3.115.017012.full.pdf+html
* GNU Parallel was cited in: RaftLib: A C++ Template Library for High Performance Stream Parallel Processing http://www.cs.wustl.edu/~lip/pubs/pmam15_jbeard.pdf * GNU Parallel was cited in: MPI-blastn and NCBI-TaxCollector: Improving metagenomic analysis with high performance classification and wide taxonomic attachment http://www.worldscientific.com/doi/abs/10.1142/S0219720014500139?af=R&
* GNU Parallel was cited in: Towards Collaborative Exploration and Analysis of Big Data from Mars: A Noachis Terra Case Study http://link.springer.com/chapter/10.1007/978-3-319-13865-7_25 * GNU Parallel was used in: https://github.com/alexbyrnes/FCC-Political-Ads_The-Code
* GNU Parallel was cited in: Quantifying properties of hot and dense QCD matter through systematic model-to-data comparison http://arxiv.org/pdf/1502.00339.pdf
* GNU Parallel was cited in: Towards Collaborative Exploration and Analysis of Big Data from Mars: A Noachis Terra Case Study http://link.springer.com/chapter/10.1007/978-3-319-13865-7_25
* GNU Parallel was cited in: Towards Recommender Engineering Tools and Experiments for Identifying Recommender Differences http://elehack.net/research/thesis/mde-thesis.pdf
* GNU Parallel was using (unfortunately with wrong citation) in: Performance and Scaling Comparison Study of RDBMS and NoSQL (MongoDB) http://ijact.in/wp-content/uploads/2014/11/COMPUSOFT-311-1270-1275.pdf
* GNU Parallel was used (unfortunately without citation) in: Parallel Implementation of Big Data Pre-Processing Algorithms for Sentiment Analysis of Social Networking Data http://www.researchmathsci.org/IJFMAart/ijfma-v6n2-7.pdf
* GNU Parallel was used (unfortunately without citation) in: SpeedSeq: Ultra-fast personal genome analysis and interpretation http://biorxiv.org/content/biorxiv/early/2014/12/05/012179.full.pdf
* Zip Folders with GNU Parallel http://fazky.github.io/Linux/2015-01-07-GNU-Parallel.html
* Using GNU Parallel with Freesurfer http://programminginadarkroom.blogspot.dk/2015/02/using-gnu-parallel-with-freesurfer.html
* GNU Parallel is used in Velociraptor: https://github.com/ericwhyne/Velociraptor
* Marcus Beach GNU Parallel http://marcusbeach.co/gnu-parallel/
* Bug fixes and man page updates. * Bug fixes and man page updates.

51
src/parallel
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@ -953,7 +953,7 @@ sub parse_options {
sub init_globals { sub init_globals {
# Defaults: # Defaults:
$Global::version = 20150222; $Global::version = 20150223;
$Global::progname = 'parallel'; $Global::progname = 'parallel';
$Global::infinity = 2**31; $Global::infinity = 2**31;
$Global::debug = 0; $Global::debug = 0;
@ -4616,20 +4616,35 @@ sub no_of_cpus_gnu_linux {
# undef if not GNU/Linux # undef if not GNU/Linux
my $no_of_cpus; my $no_of_cpus;
my $no_of_cores; my $no_of_cores;
my $no_of_active_cores;
if(-e "/proc/cpuinfo") { if(-e "/proc/cpuinfo") {
$no_of_cpus = 0; $no_of_cpus = 0;
$no_of_cores = 0; $no_of_cores = 0;
my %seen; my %seen;
open(my $in_fh, "<", "/proc/cpuinfo") || return undef; if(open(my $in_fh, "<", "/proc/cpuinfo")) {
while(<$in_fh>) { while(<$in_fh>) {
if(/^physical id.*[:](.*)/ and not $seen{$1}++) { if(/^physical id.*[:](.*)/ and not $seen{$1}++) {
$no_of_cpus++; $no_of_cpus++;
} }
/^processor.*[:]/i and $no_of_cores++; /^processor.*[:]/i and $no_of_cores++;
} }
close $in_fh; close $in_fh;
}
} }
return ($no_of_cpus||$no_of_cores); if(-e "/proc/self/status") {
# if 'taskset' is used to limit number of cores
if(open(my $in_fh, "<", "/proc/self/status")) {
while(<$in_fh>) {
if(/^Cpus_allowed:\s*(\S+)/) {
my $a = $1;
$a =~ tr/,//d;
$no_of_active_cores = unpack ("%32b*", pack ("H*",$a));
}
}
close $in_fh;
}
}
return (::min($no_of_cpus || $no_of_cores,$no_of_active_cores));
} }
sub no_of_cores_gnu_linux { sub no_of_cores_gnu_linux {
@ -4637,6 +4652,7 @@ sub no_of_cores_gnu_linux {
# Number of CPU cores on GNU/Linux # Number of CPU cores on GNU/Linux
# undef if not GNU/Linux # undef if not GNU/Linux
my $no_of_cores; my $no_of_cores;
my $no_of_active_cores;
if(-e "/proc/cpuinfo") { if(-e "/proc/cpuinfo") {
$no_of_cores = 0; $no_of_cores = 0;
open(my $in_fh, "<", "/proc/cpuinfo") || return undef; open(my $in_fh, "<", "/proc/cpuinfo") || return undef;
@ -4645,7 +4661,20 @@ sub no_of_cores_gnu_linux {
} }
close $in_fh; close $in_fh;
} }
return $no_of_cores; if(-e "/proc/self/status") {
# if 'taskset' is used to limit number of cores
if(open(my $in_fh, "<", "/proc/self/status")) {
while(<$in_fh>) {
if(/^Cpus_allowed:\s*(\S+)/) {
my $a = $1;
$a =~ tr/,//d;
$no_of_active_cores = unpack ("%32b*", pack ("H*",$a));
}
}
close $in_fh;
}
}
return (::min($no_of_cores,$no_of_active_cores));
} }
sub no_of_cpus_freebsd { sub no_of_cpus_freebsd {

66
src/parallel.pod
View file

@ -104,7 +104,7 @@ B<--env> and use B<env_parallel> instead of B<parallel>.
The command cannot contain the character \257 (macron: ¯). The command cannot contain the character \257 (macron: ¯).
=item B<{}> (beta testing) =item B<{}>
Input line. This replacement string will be replaced by a full line Input line. This replacement string will be replaced by a full line
read from the input source. The input source is normally stdin read from the input source. The input source is normally stdin
@ -117,7 +117,7 @@ If the command line contains no replacement strings then B<{}> will be
appended to the command line. appended to the command line.
=item B<{.}> (beta testing) =item B<{.}>
Input line without extension. This replacement string will be replaced Input line without extension. This replacement string will be replaced
by the input with the extension removed. If the input line contains by the input with the extension removed. If the input line contains
@ -133,7 +133,7 @@ The replacement string B<{.}> can be changed with B<--er>.
To understand replacement strings see B<{}>. To understand replacement strings see B<{}>.
=item B<{/}> (beta testing) =item B<{/}>
Basename of input line. This replacement string will be replaced by Basename of input line. This replacement string will be replaced by
the input with the directory part removed. the input with the directory part removed.
@ -144,7 +144,7 @@ B<--basenamereplace>.
To understand replacement strings see B<{}>. To understand replacement strings see B<{}>.
=item B<{//}> (beta testing) =item B<{//}>
Dirname of input line. This replacement string will be replaced by the Dirname of input line. This replacement string will be replaced by the
dir of the input line. See B<dirname>(1). dir of the input line. See B<dirname>(1).
@ -155,7 +155,7 @@ B<--dirnamereplace>.
To understand replacement strings see B<{}>. To understand replacement strings see B<{}>.
=item B<{/.}> (beta testing) =item B<{/.}>
Basename of input line without extension. This replacement string will Basename of input line without extension. This replacement string will
be replaced by the input with the directory and extension part be replaced by the input with the directory and extension part
@ -167,7 +167,7 @@ B<--basenameextensionreplace>.
To understand replacement strings see B<{}>. To understand replacement strings see B<{}>.
=item B<{#}> (beta testing) =item B<{#}>
Sequence number of the job to run. This replacement string will be Sequence number of the job to run. This replacement string will be
replaced by the sequence number of the job being run. It contains the replaced by the sequence number of the job being run. It contains the
@ -178,7 +178,7 @@ The replacement string B<{#}> can be changed with B<--seqreplace>.
To understand replacement strings see B<{}>. To understand replacement strings see B<{}>.
=item B<{%}> (beta testing) =item B<{%}>
Job slot number. This replacement string will be replaced by the job's Job slot number. This replacement string will be replaced by the job's
slot number between 1 and number of jobs to run in parallel. There slot number between 1 and number of jobs to run in parallel. There
@ -190,7 +190,7 @@ The replacement string B<{%}> can be changed with B<--slotreplace>.
To understand replacement strings see B<{}>. To understand replacement strings see B<{}>.
=item B<{>I<n>B<}> (beta testing) =item B<{>I<n>B<}>
Argument from input source I<n> or the I<n>'th argument. This Argument from input source I<n> or the I<n>'th argument. This
positional replacement string will be replaced by the input from input positional replacement string will be replaced by the input from input
@ -201,7 +201,7 @@ I<n>'th last argument.
To understand replacement strings see B<{}>. To understand replacement strings see B<{}>.
=item B<{>I<n>.B<}> (beta testing) =item B<{>I<n>.B<}>
Argument from input source I<n> or the I<n>'th argument without Argument from input source I<n> or the I<n>'th argument without
extension. It is a combination of B<{>I<n>B<}> and B<{.}>. extension. It is a combination of B<{>I<n>B<}> and B<{.}>.
@ -214,7 +214,7 @@ extension removed.
To understand positional replacement strings see B<{>I<n>B<}>. To understand positional replacement strings see B<{>I<n>B<}>.
=item B<{>I<n>/B<}> (beta testing) =item B<{>I<n>/B<}>
Basename of argument from input source I<n> or the I<n>'th argument. Basename of argument from input source I<n> or the I<n>'th argument.
It is a combination of B<{>I<n>B<}> and B<{/}>. It is a combination of B<{>I<n>B<}> and B<{/}>.
@ -227,7 +227,7 @@ directory (if any) removed.
To understand positional replacement strings see B<{>I<n>B<}>. To understand positional replacement strings see B<{>I<n>B<}>.
=item B<{>I<n>//B<}> (beta testing) =item B<{>I<n>//B<}>
Dirname of argument from input source I<n> or the I<n>'th argument. Dirname of argument from input source I<n> or the I<n>'th argument.
It is a combination of B<{>I<n>B<}> and B<{//}>. It is a combination of B<{>I<n>B<}> and B<{//}>.
@ -239,7 +239,7 @@ the I<n>'th argument (when used with B<-N>). See B<dirname>(1).
To understand positional replacement strings see B<{>I<n>B<}>. To understand positional replacement strings see B<{>I<n>B<}>.
=item B<{>I<n>/.B<}> (beta testing) =item B<{>I<n>/.B<}>
Basename of argument from input source I<n> or the I<n>'th argument Basename of argument from input source I<n> or the I<n>'th argument
without extension. It is a combination of B<{>I<n>B<}>, B<{/}>, and without extension. It is a combination of B<{>I<n>B<}>, B<{/}>, and
@ -253,7 +253,7 @@ directory (if any) and extension removed.
To understand positional replacement strings see B<{>I<n>B<}>. To understand positional replacement strings see B<{>I<n>B<}>.
=item B<{=>I<perl expression>B<=}> (beta testing) =item B<{=>I<perl expression>B<=}>
Replace with calculated I<perl expression>. B<$_> will contain the Replace with calculated I<perl expression>. B<$_> will contain the
same as B<{}>. After evaluating I<perl expression> B<$_> will be used same as B<{}>. After evaluating I<perl expression> B<$_> will be used
@ -266,7 +266,7 @@ The B<{=>I<perl expression>B<=}> must be given as a single string.
See also: B<--rpl> B<--parens> See also: B<--rpl> B<--parens>
=item B<{=>I<n> I<perl expression>B<=}> (beta testing) =item B<{=>I<n> I<perl expression>B<=}>
Positional equivalent to B<{= perl expression =}>. To understand Positional equivalent to B<{= perl expression =}>. To understand
positional replacement strings see B<{>I<n>B<}>. positional replacement strings see B<{>I<n>B<}>.
@ -444,7 +444,7 @@ I<size> defaults to 1M.
See B<--pipe> and B<--pipepart> for use of this. See B<--pipe> and B<--pipepart> for use of this.
=item B<--cat> (beta testing) =item B<--cat>
Create a temporary file with content. Normally B<--pipe>/B<--pipepart> Create a temporary file with content. Normally B<--pipe>/B<--pipepart>
will give data to the program on stdin (standard input). With B<--cat> will give data to the program on stdin (standard input). With B<--cat>
@ -454,7 +454,7 @@ you can do: B<parallel --pipe --cat wc {}>.
See also B<--fifo>. See also B<--fifo>.
=item B<--cleanup> (beta testing) =item B<--cleanup>
Remove transferred files. B<--cleanup> will remove the transferred files Remove transferred files. B<--cleanup> will remove the transferred files
on the remote computer after processing is done. on the remote computer after processing is done.
@ -568,7 +568,7 @@ If I<eof-str> is omitted, there is no end of file string. If neither
B<-E> nor B<-e> is used, no end of file string is used. B<-E> nor B<-e> is used, no end of file string is used.
=item B<--env> I<var> (beta testing) =item B<--env> I<var>
Copy environment variable I<var>. This will copy I<var> to the Copy environment variable I<var>. This will copy I<var> to the
environment that the command is run in. This is especially useful for environment that the command is run in. This is especially useful for
@ -635,7 +635,7 @@ Implies B<--semaphore>.
See also B<--bg>, B<man sem>. See also B<--bg>, B<man sem>.
=item B<--fifo> (beta testing) =item B<--fifo>
Create a temporary fifo with content. Normally B<--pipe> and Create a temporary fifo with content. Normally B<--pipe> and
B<--pipepart> will give data to the program on stdin (standard B<--pipepart> will give data to the program on stdin (standard
@ -687,9 +687,9 @@ See also: B<--line-buffer> B<--ungroup>
Print a summary of the options to GNU B<parallel> and exit. Print a summary of the options to GNU B<parallel> and exit.
=item B<--halt-on-error> I<val> (beta testing) =item B<--halt-on-error> I<val>
=item B<--halt> I<val> (beta testing) =item B<--halt> I<val>
How should GNU B<parallel> terminate? How should GNU B<parallel> terminate?
@ -925,7 +925,7 @@ limiting factor.
See also: B<--group> B<--ungroup> See also: B<--group> B<--ungroup>
=item B<--load> I<max-load> (beta testing) =item B<--load> I<max-load>
Do not start new jobs on a given computer unless the number of running Do not start new jobs on a given computer unless the number of running
processes on the computer is less than I<max-load>. I<max-load> uses processes on the computer is less than I<max-load>. I<max-load> uses
@ -973,7 +973,7 @@ See also B<-X> for context replace. If in doubt use B<-X> as that will
most likely do what is needed. most likely do what is needed.
=item B<--memfree> I<size> (beta testing) =item B<--memfree> I<size>
Minimum memory free when starting another job. The I<size> can be Minimum memory free when starting another job. The I<size> can be
postfixed with K, M, G, T, P, k, m, g, t, or p which would multiply postfixed with K, M, G, T, P, k, m, g, t, or p which would multiply
@ -1169,7 +1169,7 @@ Print the number of CPU cores and exit (used by GNU B<parallel> itself
to determine the number of CPU cores on remote computers). to determine the number of CPU cores on remote computers).
=item B<--no-keep-order> (beta testing) =item B<--no-keep-order>
Overrides an earlier B<--keep-order> (e.g. if set in Overrides an earlier B<--keep-order> (e.g. if set in
B<~/.parallel/config>). B<~/.parallel/config>).
@ -1392,7 +1392,7 @@ useful if some jobs fail for no apparent reason (such as network
failure). failure).
=item B<--return> I<filename> (alpha testing) =item B<--return> I<filename> (beta testing)
Transfer files from remote computers. B<--return> is used with Transfer files from remote computers. B<--return> is used with
B<--sshlogin> when the arguments are files on the remote computers. When B<--sshlogin> when the arguments are files on the remote computers. When
@ -1493,7 +1493,7 @@ operating system and the B<-s> option. Pipe the input from /dev/null
to do anything. to do anything.
=item B<--semaphore> (beta testing) =item B<--semaphore>
Work as a counting semaphore. B<--semaphore> will cause GNU Work as a counting semaphore. B<--semaphore> will cause GNU
B<parallel> to start I<command> in the background. When the number of B<parallel> to start I<command> in the background. When the number of
@ -1530,9 +1530,9 @@ Implies B<--semaphore>.
See also B<man sem>. See also B<man sem>.
=item B<--semaphoretimeout> I<secs> (beta testing) =item B<--semaphoretimeout> I<secs>
=item B<--st> I<secs> (beta testing) =item B<--st> I<secs>
If I<secs> > 0: If the semaphore is not released within I<secs> seconds, take it anyway. If I<secs> > 0: If the semaphore is not released within I<secs> seconds, take it anyway.
@ -1628,9 +1628,9 @@ I<secs> seconds after starting each ssh. I<secs> can be less than 1
seconds. seconds.
=item B<-S> I<[@hostgroups/][ncpu/]sshlogin[,[@hostgroups/][ncpu/]sshlogin[,...]]> (beta testing) =item B<-S> I<[@hostgroups/][ncpu/]sshlogin[,[@hostgroups/][ncpu/]sshlogin[,...]]>
=item B<--sshlogin> I<[@hostgroups/][ncpu/]sshlogin[,[@hostgroups/][ncpu/]sshlogin[,...]]> (beta testing) =item B<--sshlogin> I<[@hostgroups/][ncpu/]sshlogin[,[@hostgroups/][ncpu/]sshlogin[,...]]>
Distribute jobs to remote computers. The jobs will be run on a list of Distribute jobs to remote computers. The jobs will be run on a list of
remote computers. remote computers.
@ -1768,7 +1768,7 @@ the lines will be prepended with the sshlogin instead.
B<--tag> is ignored when using B<-u>. B<--tag> is ignored when using B<-u>.
=item B<--tagstring> I<str> (alpha testing) =item B<--tagstring> I<str> (beta testing)
Tag lines with a string. Each output line will be prepended with Tag lines with a string. Each output line will be prepended with
I<str> and TAB (\t). I<str> can contain replacement strings such as I<str> and TAB (\t). I<str> can contain replacement strings such as
@ -1785,7 +1785,7 @@ different dir for the files. Setting B<--tmpdir> is equivalent to
setting $TMPDIR. setting $TMPDIR.
=item B<--tmux> (alpha testing) =item B<--tmux> (beta testing)
Use B<tmux> for output. Start a B<tmux> session and run each job in a Use B<tmux> for output. Start a B<tmux> session and run each job in a
window in that session. No other output will be produced. window in that session. No other output will be produced.
@ -1811,7 +1811,7 @@ Print the job to be run on stderr (standard error).
See also B<-v>, B<-p>. See also B<-v>, B<-p>.
=item B<--transfer> (beta testing) =item B<--transfer>
Transfer files to remote computers. B<--transfer> is used with Transfer files to remote computers. B<--transfer> is used with
B<--sshlogin> when the arguments are files and should be transferred B<--sshlogin> when the arguments are files and should be transferred
@ -1838,7 +1838,7 @@ B<--transfer> is often used with B<--return> and B<--cleanup>.
B<--transfer> is ignored when used with B<--sshlogin :> or when not used with B<--sshlogin>. B<--transfer> is ignored when used with B<--sshlogin :> or when not used with B<--sshlogin>.
=item B<--trc> I<filename> (beta testing) =item B<--trc> I<filename>
Transfer, Return, Cleanup. Short hand for: Transfer, Return, Cleanup. Short hand for:

46
src/parallel_design.pod
View file

@ -198,20 +198,52 @@ shell is B<csh> (which cannot hide stderr).
=item --tmux =item --tmux
mkfifo I<tmpfile.tmx>;
tmux -S <tmpfile.tms> new-session -s pI<PID> -d 'sleep .2' >&/dev/null;
tmux -S <tmpfile.tms> new-window -t pI<PID> -n <<shell quoted input>> \(<<shell quoted input>>\)\;\ perl\ -e\ \'while\(\$t++\<3\)\{\ print\ \$ARGV\[0\],\"\\n\"\ \}\'\ \$\?h/\$status\ \>\>\ I<tmpfile.tmx>\&echo\ <<shell double quoted input>>\;echo\ \Job\ finished\ at:\ \`date\`\;sleep\ 10;
exec perl -e '$/="/";$_=<>;$c=<>;unlink $ARGV; /(\d+)h/ and exit($1);exit$c' I<tmpfile.tmx>
mkfifo I<tmpfile>; tmux new-session -s pI<PID> -d -n <<shell quoted input>> \(<<shell quoted input>>\)\;\ perl\ -e\ \'while\(\$t++\<3\)\{\ print\ \$ARGV\[0\],\"\\n\"\ \}\'\ \$\?h/\$status/255\ \>\>\ I<tmpfile>\&echo\ <<shell double quoted input>>\;echo\ \Job\ finished\ at:\ \`date\`\;sleep\ 10; exec perl -e '$/="/";$_=<>;$c=<>;unlink $ARGV; /(\d+)h/ and exit($1);exit$c' I<tmpfile> First a FIFO is made (.tmx). It is used for communicating exit
value. Next a new tmux session is made. This may fail if there is
already a session, so the output is ignored. If all job slots finish
at the same time, then B<tmux> will close the session. A temporary
socket is made (.tms) to avoid a race condition in B<tmux>. It is
cleaned up when GNU B<parallel> finishes.
The input is used as the name of the windows in B<tmux>. When the job The input is used as the name of the windows in B<tmux>. When the job
inside B<tmux> finishes, the exit value is printed to a fifo. This inside B<tmux> finishes, the exit value is printed to the FIFO (.tmx).
fifo is opened by perl outside B<tmux>, and perl then removes the fifo This FIFO is opened by B<perl> outside B<tmux>, and B<perl> then
(but keeping it open). Perl blocks until the first value is read from removes the FIFO. B<Perl> blocks until the first value is read from
the fifo, and this value is used as exit value. the FIFO, and this value is used as exit value.
To make it compatible with B<csh> and B<bash> the exit value is To make it compatible with B<csh> and B<bash> the exit value is
printed as: $?h/$status/255 and this is parsed by perl. printed as: $?h/$status and this is parsed by B<perl>.
Works in B<csh>.
There is a bug that makes it necessary to print the exit value 3 There is a bug that makes it necessary to print the exit value 3
times. Works in B<csh>. times.
Another bug in B<tmux> requires the length of the tmux title and
command to not have certain limits. When inside these limits, 75 '\ '
are added to the title to force it to be outside the limits.
You can map the bad limits using:
perl -e 'map { $a=$_; print map { "$a,$_\n" } (1..17000) } (1..17000)' | shuf > ab;
cat ab | parallel --colsep , --tagstring '{1}{=$_="\t"=}{2}'
tmux -S /tmp/p{%} new-session -d -n '{=1 $_="O"x$_ =}' true'\ {=2 $_="O"x$_ =};echo $?;rm /tmp/p{%}'
> value.csv 2>/dev/null
R -e 'a<-read.table("value.csv");X11();plot(a[,1],a[,2],col=a[,3]+5,cex=0.1);Sys.sleep(1000)'
For B<tmux 1.8> 17000 can be lowered to 2100.
The interesting areas are title 0..1000 with (title + whole command)
in 996..1127 and 9331..9636.
=back =back