Add multiple run averaging wrapper scripts.

Ben Bleything <ben@bleything.net>

README.rst

@@ -320,6 +320,16 @@ If you have any hints, changes or improvements, please contact:
 
  * Greg Smith greg@2ndQuadrant.com
 
+Credits
+=======
+
+The sample results given in this file have benefitted from private
+contributions all over the world.  Most submissions ask to remain
+anonymous.
+
+The multiple run averaging programs were originally contributed by
+Ben Bleything <ben@bleything.net>
+
 License
 =======
 

multi-averager

@@ -0,0 +1,41 @@
+#!/usr/bin/env ruby
+# Take the output from runs genearated by multi-stream-scaling and
+# plot an average of the values
+
+module Enumerable
+  def sum
+    return self.inject(0) {|a,e| a + e.to_f }
+  end
+
+  def mean
+    return self.sum / self.size
+  end
+
+  def std_dev
+    return Math.sqrt( self.map {|n| (n - self.mean) ** 2 }.mean )
+  end
+
+end
+
+title = ARGV[0]
+unless title
+  abort "Usage: #{$0} [report_name]"
+end
+
+results = {}
+
+Dir[ "#{title}*" ].each do |file|
+  lines = IO.popen( "cat #{file} | ./stream-graph.py" ).readlines
+  lines.shift # remove header comment
+
+  lines.map {|l| l.split }.each do |cores, result|
+    results[ cores.to_i ] ||= []
+    results[ cores.to_i ] << result.to_f
+  end
+end
+
+puts "cores,avg,stddev"
+results.sort_by {|k,v| k }.each do |cores, values|
+  puts [ cores, values.mean, values.std_dev ].join(",")
+end
+

multi-stream-scaling

@@ -0,0 +1,23 @@
+#!/usr/bin/env ruby
+# Run stream-scaling multiple times, saving each into
+# an output file based on the input test_title
+$stdout.sync = true
+
+count, title = ARGV[0,2]
+unless count and title
+  abort "Usage: #{$0} run_count test_title"
+end
+
+puts "Preparing..."
+system "rm -f stream"
+
+puts "Running warmup..."
+system "./stream-scaling > /dev/null"
+
+count.to_i.times do |run|
+  filename = "#{title}_run_#{run + 1}"
+
+  print "Starting stream-scaling run #{run + 1} of #{count}..."
+  system "./stream-scaling > #{filename}"
+  puts "multi-stream-scaling completed. Results written to #{filename}"
+end