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Added sem - semaphore for executing shell command lines in parallel
This commit is contained in:
Ole Tange
parent
48c89d6929
commit
422578c103
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@ -64,8 +64,8 @@
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'AM_SET_LEADING_DOT' => 1,
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'AM_SET_DEPDIR' => 1,
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'_AM_DEPENDENCIES' => 1,
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'm4_include' => 1,
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'AM_PROG_INSTALL_SH' => 1,
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'm4_include' => 1,
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'_AC_AM_CONFIG_HEADER_HOOK' => 1,
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'AU_DEFUN' => 1,
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'AM_MAKE_INCLUDE' => 1
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@ -83,25 +83,25 @@
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'configure.ac'
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],
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{
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'AM_PROG_F77_C_O' => 1,
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'_LT_AC_TAGCONFIG' => 1,
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'AC_INIT' => 1,
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'AM_PROG_F77_C_O' => 1,
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'm4_pattern_forbid' => 1,
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'AC_CANONICAL_TARGET' => 1,
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'AC_INIT' => 1,
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'_AM_COND_IF' => 1,
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'AC_CONFIG_LIBOBJ_DIR' => 1,
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'AC_CANONICAL_TARGET' => 1,
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'AC_SUBST' => 1,
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'AC_CANONICAL_HOST' => 1,
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'AC_CONFIG_LIBOBJ_DIR' => 1,
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'AC_FC_SRCEXT' => 1,
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'AC_CANONICAL_HOST' => 1,
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'AC_PROG_LIBTOOL' => 1,
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'AM_INIT_AUTOMAKE' => 1,
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'AC_CONFIG_SUBDIRS' => 1,
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'AM_AUTOMAKE_VERSION' => 1,
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'LT_CONFIG_LTDL_DIR' => 1,
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'AC_CONFIG_LINKS' => 1,
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'AC_REQUIRE_AUX_FILE' => 1,
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'LT_SUPPORTED_TAG' => 1,
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'AC_CONFIG_LINKS' => 1,
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'm4_sinclude' => 1,
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'LT_SUPPORTED_TAG' => 1,
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'AM_MAINTAINER_MODE' => 1,
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'AM_GNU_GETTEXT_INTL_SUBDIR' => 1,
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'_m4_warn' => 1,
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@ -114,17 +114,17 @@
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'include' => 1,
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'AM_GNU_GETTEXT' => 1,
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'AC_LIBSOURCE' => 1,
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'AC_CANONICAL_BUILD' => 1,
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'AM_PROG_FC_C_O' => 1,
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'AC_CANONICAL_BUILD' => 1,
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'AC_FC_FREEFORM' => 1,
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'AH_OUTPUT' => 1,
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'AC_CONFIG_AUX_DIR' => 1,
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'_AM_SUBST_NOTMAKE' => 1,
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'AM_PROG_CC_C_O' => 1,
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'm4_pattern_allow' => 1,
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'AC_CONFIG_AUX_DIR' => 1,
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'sinclude' => 1,
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'AM_CONDITIONAL' => 1,
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'm4_pattern_allow' => 1,
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'AM_PROG_CC_C_O' => 1,
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'AC_CANONICAL_SYSTEM' => 1,
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'AM_CONDITIONAL' => 1,
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'AC_CONFIG_HEADERS' => 1,
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'AC_DEFINE_TRACE_LITERAL' => 1,
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'm4_include' => 1,
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@ -1,14 +1,11 @@
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Added --sshloginfile .. or -S .. means use ~/.parallel/sshloginfile
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Changed .parallelrc to .parallel/config to avoid having two files in ~/
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# sem -j+0
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# sem gzip foo ";" echo done
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# Allow 7 to run. After then 7th is started, block untill one is dead
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parallel --mutex uniqidentifier -j7 command
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parallel --automutex -j7 command
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mdm.screen find dir -execdir mdm-run cmd {} \;
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find dir -execdir parallel --automutex cmd {} \;
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getppid
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fex syntax for splitting fields
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http://www.semicomplete.com/projects/fex/
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@ -93,6 +93,8 @@ New in this release:
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* --trim can remove white space around arguments.
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* NixOS package. Thanks to Ludovic Courtès <ludo at gnu dot org>
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* Zero install package. Thanks to Tim Cuthbertson <tim3d dot junk at
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gmail dot com>
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@ -1,14 +1,22 @@
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bin_SCRIPTS = parallel
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man_MANS = parallel.1
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doc_DATA = parallel.html
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bin_SCRIPTS = parallel sem
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man_MANS = parallel.1 sem.1
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doc_DATA = parallel.html sem.html
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parallel.1: parallel Makefile
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pod2man --release='$(PACKAGE_VERSION)' --center='$(PACKAGE_NAME)' \
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--section=1 $(srcdir)/parallel > $(srcdir)/parallel.1
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sem.1: sem Makefile
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pod2man --release='$(PACKAGE_VERSION)' --center='$(PACKAGE_NAME)' \
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--section=1 $(srcdir)/sem > $(srcdir)/sem.1
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parallel.html: parallel Makefile
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pod2html $(srcdir)/parallel > $(srcdir)/parallel.html
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rm $(srcdir)/pod2htm*
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DISTCLEANFILES = parallel.1 parallel.html
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EXTRA_DIST = parallel parallel.1 parallel.html
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sem.html: sem Makefile
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pod2html $(srcdir)/sem > $(srcdir)/sem.html
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rm $(srcdir)/pod2htm*
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DISTCLEANFILES = parallel.1 sem.1 parallel.html sem.html
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EXTRA_DIST = parallel sem parallel.1 sem.1 parallel.html sem.html
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@ -146,11 +146,11 @@ target_alias = @target_alias@
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top_build_prefix = @top_build_prefix@
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top_builddir = @top_builddir@
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top_srcdir = @top_srcdir@
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bin_SCRIPTS = parallel
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man_MANS = parallel.1
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doc_DATA = parallel.html
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DISTCLEANFILES = parallel.1 parallel.html
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EXTRA_DIST = parallel parallel.1 parallel.html
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bin_SCRIPTS = parallel sem
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man_MANS = parallel.1 sem.1
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doc_DATA = parallel.html sem.html
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DISTCLEANFILES = parallel.1 sem.1 parallel.html sem.html
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EXTRA_DIST = parallel sem parallel.1 sem.1 parallel.html sem.html
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all: all-am
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.SUFFIXES:
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@ -447,10 +447,18 @@ parallel.1: parallel Makefile
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pod2man --release='$(PACKAGE_VERSION)' --center='$(PACKAGE_NAME)' \
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--section=1 $(srcdir)/parallel > $(srcdir)/parallel.1
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sem.1: sem Makefile
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pod2man --release='$(PACKAGE_VERSION)' --center='$(PACKAGE_NAME)' \
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--section=1 $(srcdir)/sem > $(srcdir)/sem.1
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parallel.html: parallel Makefile
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pod2html $(srcdir)/parallel > $(srcdir)/parallel.html
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rm $(srcdir)/pod2htm*
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sem.html: sem Makefile
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pod2html $(srcdir)/sem > $(srcdir)/sem.html
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rm $(srcdir)/pod2htm*
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# Tell versions [3.59,3.63) of GNU make to not export all variables.
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# Otherwise a system limit (for SysV at least) may be exceeded.
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.NOEXPORT:
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424
src/sem
Executable file
424
src/sem
Executable file
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@ -0,0 +1,424 @@
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#!/usr/bin/perl -w
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=head1 NAME
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sem - semaphore for executing shell command lines in parallel
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=head1 SYNOPSIS
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B<sem> [--fg] [--id <id>] [--timeout <secs>] [--count <num>] [--wait] command
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=head1 DESCRIPTION
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GNU B<sem> is a tool for executing shell commands in parallel. GNU
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B<sem> acts as a counting semaphore. When GNU B<sem> is called with
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command it will start the command in the background. When I<num>
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number of commands are running in the background, GNU B<sem> will wait
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for one of these to complete before starting another command.
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GNU B<sem> is a supplement to GNU B<parallel> and can be used if the
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loop is too complex to put into a GNU B<parallel> command.
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Before looking at the options you may want to check out the examples
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after the list of options. That will give you an idea of what GNU
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B<sem> is capable of.
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=head1 OPTIONS
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=over 9
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=item I<command>
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Command to execute. The command may be followed by arguments for the command.
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=item B<--count> I<N>
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=item B<-j> I<N>
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Run up to N commands in parallel. Default is 9.
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=item B<--id> I<id>
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=item B<-i> I<id>
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Use B<id> as the name of the semaphore. Default is the name of the
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controlling tty (output from B<tty>).
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The default normally works as expected when used interactively, but
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when used in a script I<id> should be set. $$ is often a good value.
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=item B<--fg>
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Do not put command in background.
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=item B<--timeout> I<secs> (not implemented)
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=item B<-t> I<secs> (not implemented)
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If the semaphore is not released within I<secs> seconds, take it anyway.
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=item B<--wait>
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=item B<-w>
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Wait for all commands to complete.
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=back
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=head1 EXAMPLE: Gzipping *.log
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for i in `ls *.log` ; do
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echo $i
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sem gzip $i ";" echo done
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done
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sem -w
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=head1 BUGS
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Quoting and composed commands are not working.
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=head1 REPORTING BUGS
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Report bugs to <bug-parallel@gnu.org>.
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=head1 AUTHOR
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Copyright (C) 2007-10-18 Ole Tange, http://ole.tange.dk
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Copyright (C) 2008,2009,2010 Ole Tange, http://ole.tange.dk
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Copyright (C) 2010 Ole Tange, http://ole.tange.dk and Free Software
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Foundation, Inc.
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Parts of the manual concerning B<xargs> compatibility is inspired by
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the manual of B<xargs> from GNU findutils 4.4.2.
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=head1 LICENSE
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Copyright (C) 2007,2008,2009,2010 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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at your option any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
|
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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=head2 Documentation license I
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Permission is granted to copy, distribute and/or modify this documentation
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under the terms of the GNU Free Documentation License, Version 1.3 or
|
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any later version published by the Free Software Foundation; with no
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Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
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Texts. A copy of the license is included in the file fdl.txt.
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=head2 Documentation license II
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You are free:
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=over 9
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=item B<to Share>
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to copy, distribute and transmit the work
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=item B<to Remix>
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to adapt the work
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=back
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Under the following conditions:
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=over 9
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=item B<Attribution>
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You must attribute the work in the manner specified by the author or
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licensor (but not in any way that suggests that they endorse you or
|
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your use of the work).
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=item B<Share Alike>
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If you alter, transform, or build upon this work, you may distribute
|
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the resulting work only under the same, similar or a compatible
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license.
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=back
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With the understanding that:
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=over 9
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=item B<Waiver>
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Any of the above conditions can be waived if you get permission from
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the copyright holder.
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=item B<Public Domain>
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Where the work or any of its elements is in the public domain under
|
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applicable law, that status is in no way affected by the license.
|
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|
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=item B<Other Rights>
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In no way are any of the following rights affected by the license:
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=over 2
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=item *
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Your fair dealing or fair use rights, or other applicable
|
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copyright exceptions and limitations;
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=item *
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The author's moral rights;
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=item *
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Rights other persons may have either in the work itself or in
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how the work is used, such as publicity or privacy rights.
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=back
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=back
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=over 9
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=item B<Notice>
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For any reuse or distribution, you must make clear to others the
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license terms of this work.
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=back
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A copy of the full license is included in the file as cc-by-sa.txt.
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=head1 DEPENDENCIES
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GNU B<sem> uses Perl, and the Perl modules Getopt::Long,
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Symbol, Fcntl.
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=head1 SEE ALSO
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B<parallel>(1)
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=cut
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use Symbol qw(gensym);
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#use strict;
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use Getopt::Long;
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use Fcntl 'LOCK_EX', 'LOCK_NB';
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Getopt::Long::Configure ("bundling","require_order");
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GetOptions("debug|D" => \$::opt_D,
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"id|i=s" => \$::opt_id,
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"count|j=i" => \$::opt_count,
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"fg" => \$::opt_fg,
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"timeout|t=i" => \$::opt_timeout,
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"version" => \$::opt_version,
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"wait|w" => \$::opt_wait,
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) || die_usage();
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$Global::debug = $::opt_D;
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$Global::version = 20100814;
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$Global::progname = 'sem';
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my $count = 9; # Default 9
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if($::opt_count) {
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$count = $::opt_count + 1;
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}
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if($::opt_wait) {
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$count = 1;
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}
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my $id = $::opt_id;
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my $fg = $::opt_fg || $::opt_wait;
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$::opt_timeout = $::opt_timeout;
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|
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if(not defined $id) {
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# $id = getppid();
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# does not work with:
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# find . -name '*linux*' -exec sem -j1000 "sleep 3; echo `tty` '{}'" \; ; sem --wait echo done
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$id = `tty`;
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}
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$id = "id-$id";
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$id=~s/([^-_a-z0-9])/unpack("H*",$1)/ige; # Convert non-word chars to hex
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my $sem = Semaphore->new($id,$count);
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$sem->acquire();
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debug("run");
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if($fg) {
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system @ARGV;
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$sem->release();
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} else {
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# If run in the background, the PID will change
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# therefore release and re-acquire the semaphore
|
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$sem->release();
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if(not fork()) {
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# child
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# Get a semaphore for this pid
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my $child_sem = Semaphore->new($id,$count);
|
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$child_sem->acquire();
|
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system @ARGV;
|
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$child_sem->release();
|
||||
}
|
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}
|
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|
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sub version {
|
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# Returns: N/A
|
||||
print join("\n",
|
||||
"GNU $Global::progname $Global::version",
|
||||
"Copyright (C) 2010 Ole Tange and Free Software Foundation, Inc.",
|
||||
"License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>",
|
||||
"This is free software: you are free to change and redistribute it.",
|
||||
"GNU $Global::progname comes with no warranty.",
|
||||
"",
|
||||
"Web site: http://www.gnu.org/software/parallel\n"
|
||||
);
|
||||
}
|
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|
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sub usage {
|
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# Returns: N/A
|
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print "Usage:\n";
|
||||
print "$Global::progname [options] [command [arguments]] < list_of_arguments)\n";
|
||||
print "$Global::progname [options] [command [arguments]] ::: arguments\n";
|
||||
print "$Global::progname [options] [command [arguments]] :::: argfile(s)\n";
|
||||
print "\n";
|
||||
print "See 'man $Global::progname' for the options\n";
|
||||
}
|
||||
|
||||
sub die_usage {
|
||||
usage();
|
||||
exit(255);
|
||||
}
|
||||
|
||||
sub debug {
|
||||
# Returns: N/A
|
||||
$Global::debug or return;
|
||||
@_ = grep { defined $_ ? $_ : "" } @_;
|
||||
print @_;
|
||||
}
|
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|
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package Semaphore;
|
||||
|
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sub new {
|
||||
my $class = shift;
|
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my $id = shift;
|
||||
my $count = shift;
|
||||
my $parallel_locks = $ENV{'HOME'}."/.parallel/locks";
|
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-d $parallel_locks or mkdir $parallel_locks;
|
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my $lockdir = "$parallel_locks/$id";
|
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my $lockfile = $lockdir.".lock";
|
||||
return bless {
|
||||
'lockfile' => $lockfile,
|
||||
'lockfh' => Symbol::gensym(),
|
||||
'lockdir' => $lockdir,
|
||||
'id' => $id,
|
||||
'idfile' => $lockdir."/".$id,
|
||||
'pid' => $$,
|
||||
'pidfile' => $lockdir."/".$$,
|
||||
'count' => $count
|
||||
}, ref($class) || $class;
|
||||
}
|
||||
|
||||
sub acquire {
|
||||
my $self = shift;
|
||||
while(1) {
|
||||
$self->atomic_link_if_count_less_than() and last;
|
||||
::debug("Remove dead locks");
|
||||
my $lockdir = $self->{'lockdir'};
|
||||
for my $d (<$lockdir/*>) {
|
||||
$d =~ m:$lockdir/([0-9]+):o or next;
|
||||
if(not kill 0, $1) {
|
||||
::debug("Dead: $d");
|
||||
unlink $d;
|
||||
} else {
|
||||
::debug("Alive: $d");
|
||||
}
|
||||
}
|
||||
# try again
|
||||
$self->atomic_link_if_count_less_than() and last;
|
||||
sleep 1;
|
||||
# TODO if timeout: last
|
||||
}
|
||||
::debug("got $self->{'pid'}");
|
||||
}
|
||||
|
||||
sub release {
|
||||
my ($self) = shift;
|
||||
unlink $self->{'pidfile'};
|
||||
if($self->nlinks() == 1) {
|
||||
# This is the last link, so atomic cleanup
|
||||
$self->lock();
|
||||
if($self->nlinks() == 1) {
|
||||
unlink $self->{'idfile'};
|
||||
rmdir $self->{'lockdir'};
|
||||
}
|
||||
$self->unlock();
|
||||
}
|
||||
::debug("released $self->{'pid'}");
|
||||
}
|
||||
|
||||
|
||||
sub atomic_link_if_count_less_than {
|
||||
# Link $file1 to $file2 if nlinks to $file1 < $count
|
||||
my ($self) = shift;
|
||||
my ($retval) = 0;
|
||||
$self->lock();
|
||||
if($self->nlinks() < $count) {
|
||||
-d $self->{'lockdir'} || mkdir $self->{'lockdir'};
|
||||
if(not -e $self->{'idfile'}) {
|
||||
open (A, ">", $self->{'idfile'}) or die ">$self->{'idfile'}";
|
||||
close A;
|
||||
}
|
||||
$retval = link $self->{'idfile'}, $self->{'pidfile'};
|
||||
}
|
||||
$self->unlock();
|
||||
::debug("atomic $retval");
|
||||
return $retval;
|
||||
}
|
||||
|
||||
sub nlinks {
|
||||
my $self = shift;
|
||||
if(-e $self->{'idfile'}) {
|
||||
return (stat(_))[3];
|
||||
} else {
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
sub lock {
|
||||
my ($self) = shift;
|
||||
open $self->{'lockfh'}, ">", $self->{'lockfile'}
|
||||
or die "Can't open semaphore file $self->{'lockfile'}: $!";
|
||||
chmod 0666, $self->{'lockfile'}; # assuming you want it a+rw
|
||||
while(not flock $self->{'lockfh'}, LOCK_EX|LOCK_NB) {
|
||||
::debug("Cannot lock $self->{'lockfile'}");
|
||||
# TODO if timeout: last
|
||||
sleep 1;
|
||||
}
|
||||
::debug("locked $self->{'lockfile'}");
|
||||
}
|
||||
|
||||
sub unlock {
|
||||
my $self = shift;
|
||||
unlink $self->{'lockfile'};
|
||||
close $self->{'lockfh'};
|
||||
::debug("unlocked");
|
||||
}
|
||||
Loading…
Reference in a new issue