Class: Scriptroute::Tulip::LossDoctor

Inherits:
Object
  • Object
show all
Defined in:
lib/scriptroute/tulip/loss.rb

Instance Method Summary collapse

Constructor Details

#initialize(hopDetails) ⇒ LossDoctor

Returns a new instance of LossDoctor.



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# File 'lib/scriptroute/tulip/loss.rb', line 75

def initialize (hopDetails) 
  @total = Hash.new(0);
  @noLosses = Hash.new(0);
  @undesiredLosses = Hash.new(0);
  @forwardLosses = Hash.new(0);
  @reorderedResponses = Hash.new(0);
  @consecutiveIPIDs = Hash.new(0);
  @ejected = Hash.new(0);
  

  (0..$count-1).each { |num|
    startTime = Time.now;
    hopDetails.each_index { |i| 

	next if (!hopDetails[i] or @ejected.has_key?(i));
	details = hopDetails[i];
	
	#(destination, intra_train, type, ttl)
	train = LossTrain.new(details[0], $spread/1000.0, details[2], details[1]);
	puts "#{train}\n" if ($verbose>=10);

	@total[i] += 1;
	pkts = train.train.packets[0];

	next if (train.wasPcapped?);

	if (!train.isLossy?) then
 @noLosses[i] += 1; 
 if (details[3]) then
   ids = pkts.map { |p| p.response.packet.ip_id };
   if (ids[1] < ids[0] or ids[2] < ids[1]) then
     @reorderedResponses[i] += 1 if (ids[1] != 0);   #don't count routers that return 0 for big probes
   end
   if (ids[0] + 1 == ids[1] and ids[1] + 1 == ids[2]) then
     @consecutiveIPIDs[i] += 1;
   end
 end
	else
 if (!pkts[0].response or !pkts[2].response) then
   @undesiredLosses[i] += 1;
 else 
   id0 = pkts[0].response.packet.ip_id;
   id2 = pkts[2].response.packet.ip_id;
   if (id0 == id2 - 1) then
     @forwardLosses[i] += 1;
   end
 end
 if (@noLosses[i] <= 0.25*@total[i] and @total[i] >= 10) then
   @ejected[i] = 1;
 end
	end
    }

    if ($printFrequency > 0 and (num+1) % $printFrequency == 0  and num != $count-1 ) then
	puts " ---- after #{num+1} measurements ----";
	analyze(hopDetails);
    end

    sleepTime = startTime + $lag/1000.0 - Time.now;
    if (sleepTime > 0) then Kernel.sleep(sleepTime); end
  }

  puts " ---- after #{$count} measurements ----";
  analyze(hopDetails);
  
end

Instance Method Details

#analyze(hopDetails) ⇒ Object 



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# File 'lib/scriptroute/tulip/loss.rb', line 52

def analyze (hopDetails) 

  hopDetails.each_index { |hop| 
    next if (!hopDetails[hop]);
    details = hopDetails[hop];
    
    valid = @total[hop] - @undesiredLosses[hop];
#      printf("%d. %s ", $global_tpath.path[hop].hop, details[4]);
    printf("%s ", $global_tpath.path[hop]);
    printf("(ejected) ") if (@ejected.has_key?(hop));
    rt = @total[hop] - @undesiredLosses[hop] - @noLosses[hop];
    printf("rt=%.3f (%d/%d) ",(valid==0)? 0 : rt.to_f/valid, rt, valid);
    if (details[3]) then
	printf("fw=%.3f (%d/%d) ", @forwardLosses[hop].to_f/valid, @forwardLosses[hop], valid); 
	consec = @noLosses[hop] - @reorderedResponses[hop];
	consecR = (consec==0)? 0 : @consecutiveIPIDs[hop].to_f/consec;
	printf("co=%.3f (%d/%d) ", consecR, @consecutiveIPIDs[hop], consec);
	printf("ro=%.3f (%d/%d)", @reorderedResponses[hop].to_f/@noLosses[hop], @reorderedResponses[hop], @noLosses[hop]);
    end
    puts "";
  }
end