+#########################################################################
+sub fork_and_create ($) {
+ my ($thread_num) = @_;
+
+ FORK: {
+ if (my $pid = fork) {
+ # parent here
+ # child process pid is available in $pid
+ return 0;
+ } elsif (defined $pid) { # $pid is zero here if defined
+ my $current_iteration=1;
+ while ($current_iteration <= $iterations) {
+ for (my $i=1; $i<=$num_files; $i++) {
+ my $which = "";
+ if ($num_mounts > 0) {
+ $which = int(rand() * $num_mounts) + 1;
+ }
+ my $d = int(rand() * $num_files);
+ do_open("${mountpt}${which}/thread${thread_num}.${d}");
+
+ if ($num_mounts > 0) {
+ $which = int(rand() * $num_mounts) + 1;
+ }
+ $d = int(rand() * $num_files);
+ my $path = "${mountpt}${which}/thread${thread_num}.${d}";
+ print "$SCRIPT_NAME - Thread $thread_num: Unlink $path start [" . $$."]...\n" if !$silent;
+ if (unlink($path)) {
+ print "$SCRIPT_NAME - Thread $thread_num: Unlink done [$$] $path: Success\n" if !$silent;
+ } else {
+ print "$SCRIPT_NAME - Thread $thread_num: Unlink done [$$] $path: $!\n"if !$silent;
+ }
+ }
+ if (($current_iteration) % 100 == 0) {
+ print "$SCRIPT_NAME - Thread $thread_num: " . $current_iteration . " operations [" . $$ . "]\n";
+ }
+ $current_iteration++;
+ }
+
+ my $which = "";
+ if ($num_mounts > 0) {
+ $which = int(rand() * $num_mounts) + 1;
+ }
+ for (my $d = 0; $d < $num_files; $d++) {
+ my $path = "${mountpt}${which}/thread${thread_num}.${d}";
+ unlink("$path") if (-e $path);
+ }
+
+ print "$SCRIPT_NAME - Thread $thread_num: Done.\n";
+
+ exit 0;
+
+ } elsif ($! =~ /No more process/) {
+ # EAGAIN, supposedly recoverable fork error
+ sleep 5;
+ redo FORK;
+ } else {
+ # weird fork error
+ die "Can't fork: $!\n";
+ }
+ }
+
+}
+
+#########################################################################
+
+sub do_open ($) {
+ my ($path) = @_;;