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Partly fix for bug #37010: Problems if ulimit -n is > 1024

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This commit is contained in:
Ole Tange 2012-08-02 21:28:56 +02:00
parent 0a026db5e7
commit 92b9592f1d
1 changed files with 24 additions and 2 deletions
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26
src/parallel
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@ -2388,7 +2388,8 @@ sub set_time_to_login {
sub max_jobs_running {
my $self = shift;
if(not defined $self->{'max_jobs_running'}) {
$self->set_max_jobs_running($self->compute_number_of_processes($::opt_P));
my $nproc = $self->compute_number_of_processes($::opt_P);
$self->set_max_jobs_running($nproc);
}
return $self->{'max_jobs_running'};
}
@ -2406,7 +2407,11 @@ sub compute_number_of_processes {
::debug("Wanted procs: $wanted_processes\n");
my $system_limit =
$self->processes_available_by_system_limit($wanted_processes);
$system_limit < 1 and ::die_bug('$system_limit < 1');
if($system_limit < 1) {
print STDERR "$Global::progname: Cannot spawn more jobs. ",
"Raising ulimit -u may help.\n";
exit(255);
}
::debug("Limited to procs: $system_limit\n");
return $system_limit;
}
@ -2439,6 +2444,23 @@ sub processes_available_by_system_limit {
for my $i (1..8) {
open($fh{"init-$i"},"</dev/null");
}
for(1..2) {
# System process limit
my $child;
if($child = fork()) {
push (@children,$child);
$Global::unkilled_children{$child} = 1;
} elsif(defined $child) {
# The child takes one process slot
# It will be killed later
$SIG{TERM} = $Global::original_sig{TERM};
sleep 10000000;
exit(0);
} else {
$max_system_proc_reached = 1;
}
}
my $count_jobs_already_read = $Global::JobQueue->next_seq();
my $wait_time_for_getting_args = 0;
my $start_time = time;