Importing IPC-MorseSignals-0.02.tar.gz

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

diff --git a/samples/bench.pl b/samples/bench.pl
new file mode 100755 (executable)
index 0000000..852c09f
--- /dev/null
+++ b/samples/bench.pl
@@ -0,0 +1,98 @@
+#!/usr/bin/perl -T
+
+use strict;
+use warnings;
+
+use POSIX qw/SIGINT SIGTERM SIGKILL EXIT_SUCCESS/;
+
+use lib qw{blib/lib};
+
+use IPC::MorseSignals qw/msend mrecv/;
+
+my @res;
+
+sub tryspeed {
+ my ($l, $n) = @_;
+ my $speed = 2 ** 16;
+ my $ok = 0;
+ my $desc;
+ while ($speed && $ok < $n) {
+  $desc = "$n sends of $l bytes at $speed bits/s";
+  $speed /= 2;
+  $ok = 0;
+  print STDERR "try $desc";
+TRY:
+  for (1 .. $n) {
+   print STDERR ".";
+   my @alpha = ('a' .. 'z');
+   my $msg = join '', map { $alpha[rand @alpha] } 1 .. $l;
+   pipe my $rdr, my $wtr or die "$desc: pipe() failed : $!";
+   my $pid = fork;
+   if (!defined $pid) {
+    die "$desc: fork() failed : $!";
+   } elsif ($pid == 0) {
+    close $rdr;
+    local @SIG{qw/USR1 USR2/} = mrecv sub {
+     print $wtr $_[0], "\n";
+     close $wtr;
+     exit EXIT_SUCCESS;
+    };
+    1 while 1;
+   }
+   close $wtr or die "$desc: close() failed : $!";
+   eval {
+    local $SIG{ALRM} = sub { die 'alarm' };
+    my $a = (int(100 * (3 * $l) / $speed) || 1);
+    $a = 10 if $a > 10;
+    alarm $a;
+    msend $msg => $pid, $speed;
+    waitpid $pid, 0;
+   };
+   alarm 0;
+   if ($@) {
+    kill SIGINT,  $pid;
+    kill SIGTERM, $pid;
+    kill SIGKILL, $pid;
+    close $rdr or die "$desc: close() failed : $!";
+    print STDERR " timeout\n";
+    next TRY;
+   }
+   my $recv = do { local $/; <$rdr> };
+   close $rdr or die "$desc: close() failed : $!";
+   if ($recv) {
+    chomp $recv;
+    if ($msg eq $recv) {
+     ++$ok;
+    } else {
+     print STDERR " transfer error\n";
+     last TRY;
+    }
+   } else {
+    print STDERR " transfer failure\n";
+    last TRY;
+   }
+  }
+ }
+ if ($speed) {
+  print STDERR " OK\n\n";
+  $desc = "$l bytes sent $n times";
+  push @res, "$desc at $speed bits/s";
+ }
+}
+
+tryspeed 4, 1;
+tryspeed 4, 5;
+tryspeed 4, 10;
+tryspeed 4, 50;
+tryspeed 16, 1;
+tryspeed 16, 5;
+tryspeed 16, 10;
+tryspeed 64, 1;
+tryspeed 64, 5;
+tryspeed 64, 10;
+tryspeed 256, 1;
+tryspeed 256, 5;
+tryspeed 1024, 1;
+
+print STDERR "=== Summary ===\n";
+print STDERR "$_\n" for @res;