#!/usr/bin/perl -w

# Note: this is specialized for async delivery, listener mode because of the way it deals with
# thread names

use strict;

my %res = ();
my %meas;
while (<>) {
  next unless s/^\[\d+\] \d+\.\d+\s+//;
  if (s/^[^\@:]+:\d+\s+size (\d+) //) {
    # size is always the first line of an output block
    # ddsperf doesn't print CPU loads, RSS, bandwidth if it is zero
    my %tmp = %meas;
    push @{$res{$meas{size}}}, \%tmp if %meas;
    %meas = (size => $1,
             rawxmitbw => 0, rawrecvbw => 0,
             subrss => 0, pubrss => 0,
             subcpu => 0, subrecv => 0,
             pubcpu => 0, pubrecv => 0);
    $meas{$1} = $2 while s/^(mean|min|max|\d+%)\s+(\d+\.\d+)us\s*//;
    die unless /cnt \d+$/;
  } elsif (s/^(\@[^:]+:\d+\s+)?rss:(\d+\.\d+)([kM])B//) {
    my $side = defined $1 ? "pub" : "sub";
    $meas{"${side}rss"}  = $2 / ($3 eq "k" ? 1024.0 : 1);
    $meas{"${side}cpu"}  = cpuload (($side eq "pub") ? "pub" : "dq.user", $_);
    $meas{"${side}recv"} = cpuload ("recvUC", $_);
  } elsif (/xmit\s+(\d+)%\s+recv\s+(\d+)%/) {
    $meas{rawxmitbw} = $1;
    $meas{rawrecvbw} = $2;
  }
}
push @{$res{$meas{size}}}, \%meas if %meas;
die "no data found" unless keys %res > 0;

print "#size mean min 50% 90% 99% max rawxmitbw rawrecvbw pubrss subrss pubcpu pubrecv subcpu subrecv\n";
my @sizes = sort { $a <=> $b } keys %res;
for my $sz (@sizes) {
  my $ms = $res{$sz};
  my $min = min ("min", $ms);
  my $max = max ("max", $ms);
  my $mean = mean ("mean", $ms); # roughly same number of roundtrips, so not too far off
  my $median = max ("50%", $ms); # also not quite correct ...
  my $p90 = max ("90%", $ms);
  my $p99 = max ("99%", $ms);
  my $rawxmitbw = median ("rawxmitbw", $ms);
  my $rawrecvbw = median ("rawrecvbw", $ms);
  my $pubrss = max ("pubrss", $ms);
  my $subrss = max ("subrss", $ms);
  my $pubcpu = median ("pubcpu", $ms);
  my $pubrecv = median ("pubrecv", $ms);
  my $subcpu = median ("subcpu", $ms);
  my $subrecv = median ("subrecv", $ms);
  print "$sz $mean $min $median $p90 $p99 $max $rawxmitbw $rawrecvbw $pubrss $subrss $pubcpu $pubrecv $subcpu $subrecv\n";
}

sub cpuload {
  my ($thread, $line) = @_;
  $thread =~ s/\./\\./g;
  if ($line =~ /$thread:(\d+)%\+(\d+)%/) {
    return $1+$2;
  } else {
    return 0;
  }
}

sub max {
  my $v;
  for (extract (@_)) { $v = $_ unless defined $v; $v = $_ if $_ > $v; }
  return $v;
}

sub min {
  my $v;
  for (extract (@_)) { $v = $_ unless defined $v; $v = $_ if $_ < $v; }
  return $v;
}

sub mean {
  my $v = 0;
  my @xs = extract (@_);
  $v += $_ for @xs;
  return $v / @xs;
}

sub median {
  my @xs = sort { $a <=> $b } (extract (@_));
  return (@xs % 2) ? $xs[(@xs - 1) / 2] : ($xs[@xs/2 - 1] + $xs[@xs/2]) / 2;
}

sub extract {
  my ($key, $msref) = @_;
  return map { $_->{$key} } @$msref;
}
