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https://git.savannah.gnu.org/git/parallel.git
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parallel: --load implemented but not tested. Testsuite passes.
This commit is contained in:
Ole Tange
parent
baba462a0d
commit
0b31661e8e
670
src/parallel
670
src/parallel
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@ -507,6 +507,11 @@ B<-L> instead.
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Implies B<-X> unless B<-m> is set.
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=item B<--load>=I<max-load> (unimplemented)
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Do not start new jobs unless the load is less than I<max-load>.
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=item B<--controlmaster> (experimental)
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=item B<-M> (experimental)
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@ -2548,10 +2553,6 @@ $Global::JobQueue = JobQueue->new($Global::CommandLineQueue);
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init_run_jobs();
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my $sem;
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if($Global::semaphore) {
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# $Global::host{':'}{'max_no_of_running'} must be set
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#if(not defined $Global::host{':'}{'max_no_of_running'}) {
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#compute_number_of_processes_for_sshlogins();
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#}
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$sem = acquire_semaphore();
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}
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$SIG{TERM} = \&start_no_new_jobs;
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@ -2626,6 +2627,7 @@ sub get_options_from_array {
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"basenamereplace=s" => \$::opt_basenamereplace,
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"basenameextensionreplace=s" => \$::opt_basenameextensionreplace,
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"jobs|j=s" => \$::opt_P,
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"load=s" => \$::opt_load,
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"max-line-length-allowed" => \$::opt_max_line_length_allowed,
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"number-of-cpus" => \$::opt_number_of_cpus,
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"number-of-cores" => \$::opt_number_of_cores,
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@ -2820,11 +2822,7 @@ sub parse_options {
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print STDERR ("Warning: using -X or -m with --sshlogin may fail\n");
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}
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# Needs to be done after setting $Global::command and $Global::command_line_max_len
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# as '-m' influences the number of commands that needs to be run
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if(defined $::opt_P) {
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# compute_number_of_processes_for_sshlogins();
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} else {
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if(not defined $::opt_P) {
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for my $sshlogin (values %Global::host) {
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$sshlogin->set_max_jobs_running($Global::default_simultaneous_sshlogins);
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}
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@ -3035,168 +3033,6 @@ sub shell_unquote {
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sub __NUMBER_OF_PROCESSES_FILEHANDLES_MAX_LENGTH_OF_COMMAND_LINE__ {}
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# Number of parallel processes to run
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sub compute_number_of_processes {
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# Number of processes wanted and limited by system resources
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# Returns:
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# Number of processes
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my $opt_P = shift;
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my $sshlogin = shift;
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my $wanted_processes = user_requested_processes($opt_P,$sshlogin);
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if(not defined $wanted_processes) {
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$wanted_processes = $Global::default_simultaneous_sshlogins;
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}
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debug("Wanted procs: $wanted_processes\n");
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my $system_limit =
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processes_available_by_system_limit($wanted_processes,$sshlogin);
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debug("Limited to procs: $system_limit\n");
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return $system_limit;
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}
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sub processes_available_by_system_limit {
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# If the wanted number of processes is bigger than the system limits:
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# Limit them to the system limits
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# Limits are: File handles, number of input lines, processes,
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# and taking > 1 second to spawn 10 extra processes
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# Returns:
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# Number of processes
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my $wanted_processes = shift;
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my $sshlogin = shift;
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my $system_limit=0;
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my @command_lines=();
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my ($next_command_line, $args_ref);
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my $more_filehandles=1;
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my $max_system_proc_reached=0;
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my $slow_spawining_warning_printed=0;
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my $time = time;
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my %fh;
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my @children;
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do_not_reap();
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# Reserve filehandles
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# perl uses 7 filehandles for something?
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# parallel uses 1 for memory_usage
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for my $i (1..8) {
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open($fh{"init-$i"},"</dev/null");
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}
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while($system_limit < $wanted_processes
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and (not $Global::CommandLineQueue->empty() or $Global::semaphore)
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and $more_filehandles
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and not $max_system_proc_reached) {
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$system_limit++;
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if(not $Global::semaphore) {
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# If there are no more command lines, then we have a process
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# per command line, so no need to go further
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($next_command_line) = $Global::CommandLineQueue->get();
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push(@command_lines, $next_command_line);
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}
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# Every simultaneous process uses 2 filehandles when grouping
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$more_filehandles = open($fh{$system_limit*2},"</dev/null")
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&& open($fh{$system_limit*2+1},"</dev/null");
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# System process limit
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$system_limit % 10 or $time=time;
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my $child;
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if($child = fork()) {
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push (@children,$child);
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} elsif(defined $child) {
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# The child takes one process slot
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# It will be killed later
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$SIG{TERM} = $Global::original_sigterm;
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sleep 100000;
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wait_and_exit(0);
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} else {
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$max_system_proc_reached = 1;
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}
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debug("Time to fork ten procs: ", time-$time, " (processes so far: ", $system_limit,")\n");
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if(time-$time > 2 and not $slow_spawining_warning_printed) {
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# It took more than 2 second to fork ten processes.
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# Give the user a warning. He can press Ctrl-C if this
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# sucks.
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print STDERR ("Warning: Starting 10 extra processes takes > 2 sec.\n",
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"Consider adjusting -j. Press CTRL-C to stop.\n");
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$slow_spawining_warning_printed = 1;
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}
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}
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if($system_limit < $wanted_processes and not $more_filehandles) {
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print STDERR ("Warning: Only enough filehandles to run ",
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$system_limit, " jobs in parallel. ",
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"Raising ulimit -n may help\n");
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}
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if($system_limit < $wanted_processes and $max_system_proc_reached) {
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print STDERR ("Warning: Only enough available processes to run ",
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$system_limit, " jobs in parallel.\n");
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}
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# Cleanup: Close the files
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for (values %fh) { close $_ }
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# Cleanup: Kill the children
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for my $pid (@children) {
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kill 9, $pid;
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waitpid($pid,0);
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}
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#wait();
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# Cleanup: Unget the command_lines (and args_refs)
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$Global::CommandLineQueue->unget(@command_lines);
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if($sshlogin->string() ne ":" and
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$system_limit > $Global::default_simultaneous_sshlogins) {
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$system_limit =
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simultaneous_sshlogin_limit($sshlogin,$system_limit);
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}
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return $system_limit;
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}
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sub simultaneous_sshlogin {
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# Using $sshlogin try to see if we can do $wanted_processes
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# simultaneous logins
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# (ssh host echo simultaneouslogin & ssh host echo simultaneouslogin & ...)|grep simul|wc -l
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# Returns:
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# Number of succesful logins
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my $sshlogin = shift;
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my $wanted_processes = shift;
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my $sshcmd = $sshlogin->sshcommand();
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my $serverlogin = $sshlogin->serverlogin();
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my $cmd = "$sshcmd $serverlogin echo simultaneouslogin 2>&1 &"x$wanted_processes;
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debug("Trying $wanted_processes logins at $serverlogin");
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open (SIMUL, "($cmd)|grep simultaneouslogin | wc -l|") or die;
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my $ssh_limit = <SIMUL>;
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close SIMUL;
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chomp $ssh_limit;
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return $ssh_limit;
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}
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sub simultaneous_sshlogin_limit {
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# Test by logging in wanted number of times simultaneously
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# Returns:
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# min($wanted_processes,$working_simultaneous_ssh_logins-1)
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my $sshlogin = shift;
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my $wanted_processes = shift;
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my $sshcmd = $sshlogin->sshcommand();
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my $serverlogin = $sshlogin->serverlogin();
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# Try twice because it guesses wrong sometimes
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# Choose the minimal
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my $ssh_limit =
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min(simultaneous_sshlogin($sshlogin,$wanted_processes),
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simultaneous_sshlogin($sshlogin,$wanted_processes));
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if($ssh_limit < $wanted_processes) {
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print STDERR
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("Warning: ssh to $serverlogin only allows ",
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"for $ssh_limit simultaneous logins.\n",
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"You may raise this by changing ",
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"/etc/ssh/sshd_config:MaxStartup on $serverlogin\n",
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"Using only ",$ssh_limit-1," connections ",
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"to avoid race conditions\n");
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}
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# Race condition can cause problem if using all sshs.
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if($ssh_limit > 1) { $ssh_limit -= 1; }
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return $ssh_limit;
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}
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sub enough_file_handles {
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# check that we have enough filehandles available for starting
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@ -3220,194 +3056,6 @@ sub enough_file_handles {
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}
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}
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sub user_requested_processes {
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# Parse the number of processes that the user asked for using -j
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# Returns:
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# the number of processes to run on this sshlogin
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my $opt_P = shift;
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my $sshlogin = shift;
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my $processes;
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if(defined $opt_P) {
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if($opt_P =~ /^\+(\d+)$/) {
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# E.g. -P +2
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my $j = $1;
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$processes =
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$sshlogin->ncpus() + $j;
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} elsif ($opt_P =~ /^-(\d+)$/) {
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# E.g. -P -2
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my $j = $1;
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$processes =
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$sshlogin->ncpus() - $j;
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} elsif ($opt_P =~ /^(\d+)\%$/) {
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my $j = $1;
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$processes =
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$sshlogin->ncpus() * $j / 100;
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} elsif ($opt_P =~ /^(\d+)$/) {
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$processes = $1;
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if($processes == 0) {
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# -P 0 = infinity (or at least close)
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$processes = 2**31;
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}
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} elsif (-f $opt_P) {
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$Global::max_procs_file = $opt_P;
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$Global::max_procs_file_last_mod = (stat($Global::max_procs_file))[9];
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if(open(IN, $Global::max_procs_file)) {
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my $opt_P_file = join("",<IN>);
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close IN;
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$processes = user_requested_processes($opt_P_file);
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} else {
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print STDERR "Cannot open $opt_P\n";
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exit(255);
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}
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} else {
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print STDERR "Parsing of --jobs/-j/--max-procs/-P failed\n";
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die_usage();
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}
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if($processes < 1) {
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$processes = 1;
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}
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}
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return $processes;
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}
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sub _no_of_cpus {
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# Returns:
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# Number of physical CPUs
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if(not $Private::no_of_cpus) {
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local $/="\n"; # If delimiter is set, then $/ will be wrong
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my $no_of_cpus = (no_of_cpus_freebsd()
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|| no_of_cpus_darwin()
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|| no_of_cpus_solaris()
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|| no_of_cpus_gnu_linux()
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);
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if($no_of_cpus) {
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$Private::no_of_cpus = $no_of_cpus;
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} else {
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warn("Cannot figure out number of cpus. Using 1");
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$Private::no_of_cpus = 1;
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}
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}
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return $Private::no_of_cpus;
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}
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sub _no_of_cores {
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# Returns:
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# Number of CPU cores
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if(not $Private::no_of_cores) {
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local $/="\n"; # If delimiter is set, then $/ will be wrong
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my $no_of_cores = (no_of_cores_freebsd()
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|| no_of_cores_darwin()
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|| no_of_cores_solaris()
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|| no_of_cores_gnu_linux()
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);
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if($no_of_cores) {
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$Private::no_of_cores = $no_of_cores;
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} else {
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warn("Cannot figure out number of CPU cores. Using 1");
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$Private::no_of_cores = 1;
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}
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}
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return $Private::no_of_cores;
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}
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sub _no_of_cpus_gnu_linux {
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# Returns:
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# Number of physical CPUs on GNU/Linux
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my $no_of_cpus;
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if(-e "/proc/cpuinfo") {
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$no_of_cpus = 0;
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my %seen;
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open(IN,"cat /proc/cpuinfo|") || return undef;
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while(<IN>) {
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if(/^physical id.*[:](.*)/ and not $seen{$1}++) {
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$no_of_cpus++;
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}
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}
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close IN;
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}
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return $no_of_cpus;
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}
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sub _no_of_cores_gnu_linux {
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# Returns:
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# Number of CPU cores on GNU/Linux
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my $no_of_cores;
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if(-e "/proc/cpuinfo") {
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$no_of_cores = 0;
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open(IN,"cat /proc/cpuinfo|") || return undef;
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while(<IN>) {
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/^processor.*[:]/ and $no_of_cores++;
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}
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close IN;
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}
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return $no_of_cores;
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}
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sub _no_of_cpus_darwin {
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# Returns:
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# Number of physical CPUs on Mac Darwin
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my $no_of_cpus = `sysctl -a hw 2>/dev/null | grep -w physicalcpu | awk '{ print \$2 }'`;
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return $no_of_cpus;
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}
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sub _no_of_cores_darwin {
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# Returns:
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# Number of CPU cores on Mac Darwin
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my $no_of_cores = `sysctl -a hw 2>/dev/null | grep -w logicalcpu | awk '{ print \$2 }'`;
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return $no_of_cores;
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}
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sub _no_of_cpus_freebsd {
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# Returns:
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# Number of physical CPUs on FreeBSD
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my $no_of_cpus = `sysctl hw.ncpu 2>/dev/null | awk '{ print \$2 }'`;
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return $no_of_cpus;
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}
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sub _no_of_cores_freebsd {
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# Returns:
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# Number of CPU cores on FreeBSD
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my $no_of_cores = `sysctl -a hw 2>/dev/null | grep -w logicalcpu | awk '{ print \$2 }'`;
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return $no_of_cores;
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}
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sub _no_of_cpus_solaris {
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# Returns:
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# Number of physical CPUs on Solaris
|
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if(-x "/usr/sbin/psrinfo") {
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my @psrinfo = `/usr/sbin/psrinfo`;
|
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if($#psrinfo >= 0) {
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return $#psrinfo +1;
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}
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}
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if(-x "/usr/sbin/prtconf") {
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my @prtconf = `/usr/sbin/prtconf | grep cpu..instance`;
|
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if($#prtconf >= 0) {
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return $#prtconf +1;
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}
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}
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return undef;
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}
|
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|
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sub no_of_cores_solaris {
|
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# Returns:
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# Number of CPU cores on Solaris
|
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if(-x "/usr/sbin/psrinfo") {
|
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my @psrinfo = `/usr/sbin/psrinfo`;
|
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if($#psrinfo >= 0) {
|
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return $#psrinfo +1;
|
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}
|
||||
}
|
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if(-x "/usr/sbin/prtconf") {
|
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my @prtconf = `/usr/sbin/prtconf | grep cpu..instance`;
|
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if($#prtconf >= 0) {
|
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return $#prtconf +1;
|
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}
|
||||
}
|
||||
return undef;
|
||||
}
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|
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#
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# General useful library functions
|
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#
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|
|
@ -3752,7 +3400,11 @@ sub start_more_jobs {
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}
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for my $sshlogin (values %Global::host) {
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debug("Running jobs on ".$sshlogin->string().": ".$sshlogin->jobs_running()."\n");
|
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while ($sshlogin->jobs_running() < $sshlogin->max_jobs_running()) {
|
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while ($sshlogin->jobs_running() < $sshlogin->max_jobs_running()
|
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and
|
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(($::opt_load and $sshlogin->loadavg() < $sshlogin->max_loadavg())
|
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or
|
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1)) {
|
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if($Global::JobQueue->empty()) {
|
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last;
|
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}
|
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|
|
@ -3807,10 +3459,6 @@ sub start_another_job {
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}
|
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}
|
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|
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|
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|
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|
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|
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sub __READING_AND_QUOTING_ARGUMENTS__ {}
|
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|
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sub get_job_with_sshlogin {
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|
|
@ -3867,9 +3515,6 @@ sub get_job_with_sshlogin {
|
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return $job;
|
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}
|
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|
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|
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|
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|
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sub __REMOTE_SSH__ {}
|
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|
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sub read_sshloginfile {
|
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|
|
@ -3939,8 +3584,6 @@ sub remote_hosts {
|
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return grep !/^:$/, keys %Global::host;
|
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}
|
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|
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|
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|
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sub setup_basefile {
|
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# Transfer basefiles to each $sshlogin
|
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# This needs to be done before first jobs on $sshlogin is run
|
||||
|
|
@ -4221,7 +3864,6 @@ sub my_size {
|
|||
}
|
||||
}
|
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|
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|
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sub my_dump {
|
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# Returns:
|
||||
# ascii expression of object if Data::Dump(er) is installed
|
||||
|
|
@ -4320,20 +3962,306 @@ sub set_max_jobs_running {
|
|||
$self->{'max_jobs_running'} = shift;
|
||||
}
|
||||
|
||||
sub loadavg {
|
||||
my $self = shift;
|
||||
# TODO add some caching so we do not compute this more than
|
||||
# once per second
|
||||
my $uptime = $self->sshcommand() . " " . $self->serverlogin() . " uptime";
|
||||
my $loadavg;
|
||||
# load average: 0.76, 1.53, 1.45
|
||||
if($uptime =~ /load average: (\d+.\d+)/) {
|
||||
$loadavg = $1;
|
||||
} else {
|
||||
die "Cannot find loadaverage from ".$self->string();
|
||||
}
|
||||
return $loadavg;
|
||||
}
|
||||
|
||||
sub max_loadavg {
|
||||
my $self = shift;
|
||||
if(not defined $self->{'max_loadavg'}) {
|
||||
$self->{'max_loadavg'} =
|
||||
$self->compute_max_loadavg($::opt_load);
|
||||
}
|
||||
return $self->{'max_loadavg'};
|
||||
}
|
||||
|
||||
sub compute_max_loadavg {
|
||||
# Parse the max loadaverage that the user asked for using --load
|
||||
# Returns:
|
||||
# max loadaverage
|
||||
my $self = shift;
|
||||
my $loadspec = shift;
|
||||
my $load;
|
||||
if(defined $loadspec) {
|
||||
if($loadspec =~ /^\+(\d+)$/) {
|
||||
# E.g. --load +2
|
||||
my $j = $1;
|
||||
$load =
|
||||
$self->ncpus() + $j;
|
||||
} elsif ($loadspec =~ /^-(\d+)$/) {
|
||||
# E.g. --load -2
|
||||
my $j = $1;
|
||||
$load =
|
||||
$self->ncpus() - $j;
|
||||
} elsif ($loadspec =~ /^(\d+)\%$/) {
|
||||
my $j = $1;
|
||||
$load =
|
||||
$self->ncpus() * $j / 100;
|
||||
} elsif ($loadspec =~ /^(\d+)$/) {
|
||||
$load = $1;
|
||||
if($load == 0) {
|
||||
# --load 0 = infinity (or at least close)
|
||||
$load = 2**31;
|
||||
}
|
||||
} elsif (-f $loadspec) {
|
||||
# TODO this needs to be done for $loadspec
|
||||
die;
|
||||
$Global::max_procs_file = $loadspec;
|
||||
$Global::max_procs_file_last_mod = (stat($Global::max_procs_file))[9];
|
||||
if(open(IN, $Global::max_procs_file)) {
|
||||
my $opt_P_file = join("",<IN>);
|
||||
close IN;
|
||||
$load = $self->compute_max_loadavg($opt_P_file);
|
||||
} else {
|
||||
print STDERR "Cannot open $loadspec\n";
|
||||
exit(255);
|
||||
}
|
||||
} else {
|
||||
print STDERR "Parsing of --load failed\n";
|
||||
::die_usage();
|
||||
}
|
||||
if($load < 0.01) {
|
||||
$load = 0.01;
|
||||
}
|
||||
}
|
||||
return $load;
|
||||
}
|
||||
|
||||
sub max_jobs_running {
|
||||
my $self = shift;
|
||||
if(not defined $self->{'max_jobs_running'}) {
|
||||
$self->{'max_jobs_running'} =
|
||||
::compute_number_of_processes($::opt_P,$self);
|
||||
$self->compute_number_of_processes($::opt_P);
|
||||
}
|
||||
return $self->{'max_jobs_running'};
|
||||
}
|
||||
|
||||
sub compute_number_of_processes {
|
||||
# Number of processes wanted and limited by system resources
|
||||
# Returns:
|
||||
# Number of processes
|
||||
my $self = shift;
|
||||
my $opt_P = shift;
|
||||
my $wanted_processes = $self->user_requested_processes($opt_P);
|
||||
if(not defined $wanted_processes) {
|
||||
$wanted_processes = $Global::default_simultaneous_sshlogins;
|
||||
}
|
||||
::debug("Wanted procs: $wanted_processes\n");
|
||||
my $system_limit =
|
||||
$self->processes_available_by_system_limit($wanted_processes);
|
||||
::debug("Limited to procs: $system_limit\n");
|
||||
return $system_limit;
|
||||
}
|
||||
|
||||
sub processes_available_by_system_limit {
|
||||
# If the wanted number of processes is bigger than the system limits:
|
||||
# Limit them to the system limits
|
||||
# Limits are: File handles, number of input lines, processes,
|
||||
# and taking > 1 second to spawn 10 extra processes
|
||||
# Returns:
|
||||
# Number of processes
|
||||
my $self = shift;
|
||||
my $wanted_processes = shift;
|
||||
|
||||
my $system_limit=0;
|
||||
my @command_lines=();
|
||||
my ($next_command_line, $args_ref);
|
||||
my $more_filehandles=1;
|
||||
my $max_system_proc_reached=0;
|
||||
my $slow_spawining_warning_printed=0;
|
||||
my $time = time;
|
||||
my %fh;
|
||||
my @children;
|
||||
::do_not_reap();
|
||||
|
||||
# Reserve filehandles
|
||||
# perl uses 7 filehandles for something?
|
||||
# parallel uses 1 for memory_usage
|
||||
for my $i (1..8) {
|
||||
open($fh{"init-$i"},"</dev/null");
|
||||
}
|
||||
while($system_limit < $wanted_processes
|
||||
and (not $Global::CommandLineQueue->empty() or $Global::semaphore)
|
||||
and $more_filehandles
|
||||
and not $max_system_proc_reached) {
|
||||
$system_limit++;
|
||||
|
||||
if(not $Global::semaphore) {
|
||||
# If there are no more command lines, then we have a process
|
||||
# per command line, so no need to go further
|
||||
|
||||
($next_command_line) = $Global::CommandLineQueue->get();
|
||||
push(@command_lines, $next_command_line);
|
||||
}
|
||||
|
||||
# Every simultaneous process uses 2 filehandles when grouping
|
||||
$more_filehandles = open($fh{$system_limit*2},"</dev/null")
|
||||
&& open($fh{$system_limit*2+1},"</dev/null");
|
||||
|
||||
# System process limit
|
||||
$system_limit % 10 or $time=time;
|
||||
my $child;
|
||||
if($child = fork()) {
|
||||
push (@children,$child);
|
||||
} elsif(defined $child) {
|
||||
# The child takes one process slot
|
||||
# It will be killed later
|
||||
$SIG{TERM} = $Global::original_sigterm;
|
||||
sleep 100000;
|
||||
wait_and_exit(0);
|
||||
} else {
|
||||
$max_system_proc_reached = 1;
|
||||
}
|
||||
::debug("Time to fork ten procs: ", time-$time, " (processes so far: ", $system_limit,")\n");
|
||||
if(time-$time > 2 and not $slow_spawining_warning_printed) {
|
||||
# It took more than 2 second to fork ten processes.
|
||||
# Give the user a warning. He can press Ctrl-C if this
|
||||
# sucks.
|
||||
print STDERR ("Warning: Starting 10 extra processes takes > 2 sec.\n",
|
||||
"Consider adjusting -j. Press CTRL-C to stop.\n");
|
||||
$slow_spawining_warning_printed = 1;
|
||||
}
|
||||
}
|
||||
if($system_limit < $wanted_processes and not $more_filehandles) {
|
||||
print STDERR ("Warning: Only enough filehandles to run ",
|
||||
$system_limit, " jobs in parallel. ",
|
||||
"Raising ulimit -n may help\n");
|
||||
}
|
||||
if($system_limit < $wanted_processes and $max_system_proc_reached) {
|
||||
print STDERR ("Warning: Only enough available processes to run ",
|
||||
$system_limit, " jobs in parallel.\n");
|
||||
}
|
||||
# Cleanup: Close the files
|
||||
for (values %fh) { close $_ }
|
||||
# Cleanup: Kill the children
|
||||
for my $pid (@children) {
|
||||
kill 9, $pid;
|
||||
waitpid($pid,0);
|
||||
}
|
||||
|
||||
#wait();
|
||||
# Cleanup: Unget the command_lines (and args_refs)
|
||||
$Global::CommandLineQueue->unget(@command_lines);
|
||||
if($self->string() ne ":" and
|
||||
$system_limit > $Global::default_simultaneous_sshlogins) {
|
||||
$system_limit =
|
||||
$self->simultaneous_sshlogin_limit($system_limit);
|
||||
}
|
||||
return $system_limit;
|
||||
}
|
||||
|
||||
sub simultaneous_sshlogin_limit {
|
||||
# Test by logging in wanted number of times simultaneously
|
||||
# Returns:
|
||||
# min($wanted_processes,$working_simultaneous_ssh_logins-1)
|
||||
my $self = shift;
|
||||
my $wanted_processes = shift;
|
||||
# Try twice because it guesses wrong sometimes
|
||||
# Choose the minimal
|
||||
my $ssh_limit =
|
||||
::min($self->simultaneous_sshlogin($wanted_processes),
|
||||
$self->simultaneous_sshlogin($wanted_processes));
|
||||
if($ssh_limit < $wanted_processes) {
|
||||
my $serverlogin = $self->serverlogin();
|
||||
print STDERR
|
||||
("Warning: ssh to $serverlogin only allows ",
|
||||
"for $ssh_limit simultaneous logins.\n",
|
||||
"You may raise this by changing ",
|
||||
"/etc/ssh/sshd_config:MaxStartup on $serverlogin\n",
|
||||
"Using only ",$ssh_limit-1," connections ",
|
||||
"to avoid race conditions\n");
|
||||
}
|
||||
# Race condition can cause problem if using all sshs.
|
||||
if($ssh_limit > 1) { $ssh_limit -= 1; }
|
||||
return $ssh_limit;
|
||||
}
|
||||
|
||||
|
||||
sub simultaneous_sshlogin {
|
||||
# Using $sshlogin try to see if we can do $wanted_processes
|
||||
# simultaneous logins
|
||||
# (ssh host echo simultaneouslogin & ssh host echo simultaneouslogin & ...)|grep simul|wc -l
|
||||
# Returns:
|
||||
# Number of succesful logins
|
||||
my $self = shift;
|
||||
my $wanted_processes = shift;
|
||||
my $sshcmd = $self->sshcommand();
|
||||
my $serverlogin = $self->serverlogin();
|
||||
my $cmd = "$sshcmd $serverlogin echo simultaneouslogin 2>&1 &"x$wanted_processes;
|
||||
::debug("Trying $wanted_processes logins at $serverlogin");
|
||||
open (SIMUL, "($cmd)|grep simultaneouslogin | wc -l|") or die;
|
||||
my $ssh_limit = <SIMUL>;
|
||||
close SIMUL;
|
||||
chomp $ssh_limit;
|
||||
return $ssh_limit;
|
||||
}
|
||||
|
||||
sub set_ncpus {
|
||||
my $self = shift;
|
||||
$self->{'ncpus'} = shift;
|
||||
}
|
||||
|
||||
sub user_requested_processes {
|
||||
# Parse the number of processes that the user asked for using -j
|
||||
# Returns:
|
||||
# the number of processes to run on this sshlogin
|
||||
my $self = shift;
|
||||
my $opt_P = shift;
|
||||
my $processes;
|
||||
if(defined $opt_P) {
|
||||
if($opt_P =~ /^\+(\d+)$/) {
|
||||
# E.g. -P +2
|
||||
my $j = $1;
|
||||
$processes =
|
||||
$self->ncpus() + $j;
|
||||
} elsif ($opt_P =~ /^-(\d+)$/) {
|
||||
# E.g. -P -2
|
||||
my $j = $1;
|
||||
$processes =
|
||||
$self->ncpus() - $j;
|
||||
} elsif ($opt_P =~ /^(\d+)\%$/) {
|
||||
my $j = $1;
|
||||
$processes =
|
||||
$self->ncpus() * $j / 100;
|
||||
} elsif ($opt_P =~ /^(\d+)$/) {
|
||||
$processes = $1;
|
||||
if($processes == 0) {
|
||||
# -P 0 = infinity (or at least close)
|
||||
$processes = 2**31;
|
||||
}
|
||||
} elsif (-f $opt_P) {
|
||||
$Global::max_procs_file = $opt_P;
|
||||
$Global::max_procs_file_last_mod = (stat($Global::max_procs_file))[9];
|
||||
if(open(IN, $Global::max_procs_file)) {
|
||||
my $opt_P_file = join("",<IN>);
|
||||
close IN;
|
||||
$processes = $self->user_requested_processes($opt_P_file);
|
||||
} else {
|
||||
print STDERR "Cannot open $opt_P\n";
|
||||
exit(255);
|
||||
}
|
||||
} else {
|
||||
print STDERR "Parsing of --jobs/-j/--max-procs/-P failed\n";
|
||||
::die_usage();
|
||||
}
|
||||
if($processes < 1) {
|
||||
$processes = 1;
|
||||
}
|
||||
}
|
||||
return $processes;
|
||||
}
|
||||
|
||||
sub ncpus {
|
||||
my $self = shift;
|
||||
if(not defined $self->{'ncpus'}) {
|
||||
|
|
|
|||
Loading…
Reference in a new issue