Importing IPC-MorseSignals-0.06.tar.gz

[perl/modules/IPC-MorseSignals.git] / samples / bench.pl

diff --git a/samples/bench.pl b/samples/bench.pl
index 4e4d57fabcf4c115bdffa773ef0cc57796ee0ce0..317f79479a733b3b31595309937e574af1b6c3b7 100755 (executable)
--- a/samples/bench.pl
+++ b/samples/bench.pl
@@ -3,66 +3,89 @@
 use strict;
 use warnings;
 
-use POSIX qw/SIGINT SIGTERM SIGKILL EXIT_SUCCESS EXIT_FAILURE WIFEXITED WEXITSTATUS/;
+use POSIX qw/SIGINT SIGTERM SIGKILL SIGHUP EXIT_FAILURE/;
 
 use lib qw{blib/lib};
 
-use IPC::MorseSignals qw/msend mrecv/;
+use IPC::MorseSignals qw/msend mrecv mreset/;
+
+my $lives = 100;
+
+sub spawn {
+ --$lives;
+ die 'forked too many times' if $lives < 0;
+ pipe my $rdr, my $wtr or die "pipe() failed: $!";
+ my $pid = fork;
+ if (!defined $pid) {
+  die "fork() failed: $!";
+ } elsif ($pid == 0) {
+  close $rdr or die "close() failed: $!";
+  my $s = mrecv local %SIG, cb => sub {
+   select $wtr; $| = 1;
+   print $wtr $_[1], "\n";
+   select $wtr; $| = 1;
+  };
+  $SIG{'HUP'} = sub { mreset $s };
+  1 while 1;
+  exit EXIT_FAILURE;
+ }
+ close $wtr or die "close() failed: $!";
+ return ($pid, $rdr);
+}  
+
+sub slaughter {
+ my ($pid) = @_;
+ kill SIGINT  => $pid;
+ kill SIGTERM => $pid;
+ kill SIGKILL => $pid;
+ waitpid $pid, 0;
+}  
 
 my @res;
 
-sub tryspeed {
+my ($pid, $rdr) = spawn;
+
+sub tryspeed {  
  my ($l, $n) = @_;
  my $speed = 2 ** 16;
  my $ok = 0;
- my $desc;
-SPEED:
- while (($speed > 1) && ($ok < $n)) {
-  $speed /= 2;
-  $desc = "$n sends of $l bytes at $speed bits/s";
-  $ok = 0;
-  print STDERR "try $desc";
+ my @alpha = ('a' .. 'z');
+ my $msg = join '', map { $alpha[rand @alpha] } 1 .. $l;
+ while (($ok < $n) && (($speed /= 2) >= 1)) {
+  print STDERR "$n sends of $l bytes at $speed bits/s";
+TRY:
   for (1 .. $n) {
-   print STDERR ".";
-   my @alpha = ('a' .. 'z');
-   my $msg = join '', map { $alpha[rand @alpha] } 1 .. $l;
-   my $pid = fork;
-   if (!defined $pid) {
-    die "$desc: fork() failed : $!";
-   } elsif ($pid == 0) {
-    local @SIG{qw/USR1 USR2/} = mrecv sub {
-     exit(($msg eq $_[0]) ? EXIT_SUCCESS : EXIT_FAILURE);
-    };
-    1 while 1;
-    exit EXIT_FAILURE;
-   }
-   my $next = 0;
+   print STDERR '.';
+   my $r = '';
    eval {
-    local $SIG{ALRM} = sub { die 'timeout' };
+    local $SIG{ALRM} = sub { print STDERR "timeout\n"; die };
     my $a = (int(100 * (3 * $l) / $speed) || 1);
     $a = 10 if $a > 10;
     alarm $a;
     msend $msg => $pid, speed => $speed;
-    waitpid $pid, 0;
-    if (WIFEXITED($?) && (WEXITSTATUS($?) == EXIT_SUCCESS)) {
+    $r = <$rdr>;
+   };
+   kill SIGHUP => $pid if $@;
+   alarm 0;
+   if (!defined $r) { # Something bad happened, respawn
+    print STDERR "oops\n";
+    close $rdr or die "close() failed: $!";
+    slaughter $pid;
+    ($pid, $rdr) = spawn;
+    redo TRY;         # Retry this send
+   } else {
+    chomp $r;
+    if ($r eq $msg) {
      ++$ok;
     } else {
-     print STDERR " transfer error\n";
-     $next = 1;
+     print STDERR "transfer error\n";
+     kill SIGHUP => $pid;
+     last TRY;
     }
-   };
-   alarm 0;
-   if ($@) {
-    kill SIGINT,  $pid;
-    kill SIGTERM, $pid;
-    kill SIGKILL, $pid;
-    print STDERR " timeout\n";
-    $next = 1;
    }
-   next SPEED if $next;
   }
  }
- $desc = "$l bytes sent $n times";
+ my $desc = "$l bytes sent $n times";
  if ($speed >= 1) {
   print STDERR " OK\n\n";
   push @res, "$desc at $speed bits/s";
@@ -72,20 +95,20 @@ SPEED:
  }
 }
 
-tryspeed 4, 1;
-tryspeed 4, 4;
-tryspeed 4, 16;
-tryspeed 4, 64;
-tryspeed 4, 256;
-tryspeed 16, 1;
-tryspeed 16, 4;
-tryspeed 16, 16;
-tryspeed 16, 64;
-tryspeed 64, 1;
-tryspeed 64, 4;
-tryspeed 64, 16;
-tryspeed 256, 1;
-tryspeed 256, 4;
+tryspeed 4,    1;
+tryspeed 4,    4;
+tryspeed 4,    16;
+tryspeed 4,    64;
+tryspeed 4,    256;
+tryspeed 16,   1;
+tryspeed 16,   4;
+tryspeed 16,   16;
+tryspeed 16,   64;
+tryspeed 64,   1;
+tryspeed 64,   4;
+tryspeed 64,   16;
+tryspeed 256,  1;
+tryspeed 256,  4;
 tryspeed 1024, 1;
 
 print STDERR "=== Summary ===\n";