-sub _diffms
-{
- return unless isdbg('chan');
- my $call = shift;
- my $a = shift;
- my $b = shift || [gettimeofday];
- my $prefix = shift;
-
- my $secs = $b->[0] - $a->[0];
- my $msecs = int(($b->[1] - $a->[1]) / 1000);
-
- my $s = "forkcall stats: $call ";
- $s .= "$prefix " if $prefix;
- $s .= "${secs}S" if $secs;
- $s .= "${msecs}mS";
- dbg($s);
-}