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src/parallel: Number of remote CPUs now detected.
Potential bug: If max_command_length is different on the machines.
This commit is contained in:
Ole Tange
parent
d26f62a363
commit
fc7fba878b
76
src/parallel
76
src/parallel
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@ -267,12 +267,21 @@ Print the number of CPUs and exit (used by GNU B<parallel> itself to
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determine the number of CPUs on remote machines).
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=item B<--number-of-cores>
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=item B<--number-of-cores> (not implemented)
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Print the number of cores and exit (used by GNU B<parallel> itself to determine the
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number of cores on remote machines).
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=item B<--interactive>
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=item B<-p>
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Prompt the user about whether to run each command line and read a line
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from the terminal. Only run the command line if the response starts
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with 'y' or 'Y'. Implies B<-t>.
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=item B<--quote>
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=item B<-q>
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@ -283,15 +292,6 @@ QUOTING. Most people will never need this. Quoting is disabled by
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default.
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=item B<--interactive>
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=item B<-p>
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Prompt the user about whether to run each command line and read a line
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from the terminal. Only run the command line if the response starts
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with 'y' or 'Y'. Implies B<-t>.
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=item B<--no-run-if-empty>
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=item B<-r>
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@ -1261,7 +1261,7 @@ sub parse_options {
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if(defined $::opt_P) {
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for my $sshlogin (keys %Global::host) {
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$Global::host{$sshlogin}{'max_no_of_running'} =
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compute_number_of_processes($::opt_P);
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compute_number_of_processes($::opt_P,$sshlogin);
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}
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} else {
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for my $sshlogin (keys %Global::host) {
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@ -1491,9 +1491,10 @@ sub is_acceptable_command_line_length {
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sub compute_number_of_processes {
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# Number of processes wanted and limited by system ressources
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my $opt_P = shift;
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my $wanted_processes = user_requested_processes($opt_P);
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my $sshlogin = shift;
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my $wanted_processes = user_requested_processes($opt_P,$sshlogin);
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debug("Wanted procs: $wanted_processes\n");
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my $system_limit = processes_available_by_system_limit($wanted_processes);
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my $system_limit = processes_available_by_system_limit($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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@ -1504,6 +1505,7 @@ sub processes_available_by_system_limit {
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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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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;
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@ -1609,19 +1611,20 @@ sub enough_file_handles {
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sub user_requested_processes {
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# Parse the number of processes that the user asked for
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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 = $j + no_of_cpus();
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$processes = $j + no_of_cpus_sshlogin($sshlogin);
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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 = no_of_cpus() - $j;
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$processes = no_of_cpus_sshlogin($sshlogin) - $j;
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} elsif ($opt_P =~ /^(\d+)\%$/) {
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my $j = $1;
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$processes = no_of_cpus() * $j / 100;
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$processes = no_of_cpus_sshlogin($sshlogin) * $j / 100;
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} elsif ($opt_P =~ /^(\d+)$/) {
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$processes = $1;
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if($processes == 0) {
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@ -1643,6 +1646,21 @@ sub no_of_cores {
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return no_of_cpus(@_);
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}
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sub no_of_cpus_sshlogin {
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# Number of CPUs at this sshlogin
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my $sshlogin = shift;
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if(not $Global::host{$sshlogin}{'ncpus'}) {
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if($sshlogin eq ":") {
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$Global::host{$sshlogin}{'ncpus'} = no_of_cpus();
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} else {
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my $ncpu = qx(echo|ssh $sshlogin parallel --number-of-cpus);
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chomp($ncpu);
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$Global::host{$sshlogin}{'ncpus'} = $ncpu;
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}
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}
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return $Global::host{$sshlogin}{'ncpus'};
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}
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sub no_of_cpus {
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if(not $Global::no_of_cpus) {
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local $/="\n"; # If delimiter is set, then $/ will be wrong
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@ -1819,7 +1837,6 @@ sub start_another_job {
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}
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} else {
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# No more file handles
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warn("Not enough file handles to start another job");
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return 0;
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}
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}
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@ -1951,26 +1968,19 @@ sub read_sshloginfile {
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sub parse_sshlogin {
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my ($ncpu,@login);
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my (@login);
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if(not @Global::sshlogin) { @Global::sshlogin = (":"); }
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for my $ssh (@Global::sshlogin) {
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for my $sshlogin (@Global::sshlogin) {
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# Split up -S sshlogin,sshlogin
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push (@login, (split /,/, $ssh));
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push (@login, (split /,/, $sshlogin));
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}
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for my $ssh (@login) {
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if($ssh =~ s:^(\d+)/::) {
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$ncpu = $1;
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} else {
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if($ssh eq ":") {
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$ncpu = no_of_cpus();
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} else {
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$ncpu = qx(echo|ssh $ssh parallel --number-of-cpus);
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chomp($ncpu);
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for my $sshlogin (@login) {
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if($sshlogin =~ s:^(\d+)/::) {
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# Override default autodetected ncpus
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$Global::host{$sshlogin}{'ncpus'} = $1;
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}
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}
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$Global::host{$ssh}{'no_of_running'} = 0;
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$Global::host{$ssh}{'ncpus'} = $ncpu;
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$Global::host{$ssh}{'maxlength'} = max_length_of_command_line();
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$Global::host{$sshlogin}{'no_of_running'} = 0;
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$Global::host{$sshlogin}{'maxlength'} = max_length_of_command_line();
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}
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debug("sshlogin: ", my_dump(%Global::host));
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}
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