From c69e0012f6845fcfe8d89bc980c14b7993d99cde Mon Sep 17 00:00:00 2001
From: "Bjoern B. Brandenburg" <bbb@cs.unc.edu>
Date: Fri, 18 Feb 2011 17:55:36 -0500
Subject: tweak overhead plotting

---
 oplot.py | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/oplot.py b/oplot.py
index 2f7f0cb..e0b4c69 100755
--- a/oplot.py
+++ b/oplot.py
@@ -24,6 +24,9 @@ options = [
     o('-i', '--iqr-extent', action='store', dest='extent', type='float',
       help='what extent to use for outlier removal'),
 
+    o('-c', '--cut-off', action='store', dest='cutoff', type='int',
+      help='max number of samples to use'),
+
     ]
 
 defaults = {
@@ -35,12 +38,23 @@ defaults = {
     # data processing
     'cycles' : 2128, # per usec
     'extent' : 3,
+    'cutoff' : None,
 
     # formatting options
     'binsize' : 0.25,
     }
 
 
+TXT = {
+    'RELEASE-LATENCY' : 'timer latency',
+    'RELEASE' : 'job release overhead',
+    'SCHED' : 'scheduling overhead',
+    'SCHED2' : 'post-scheduling overhead',
+    'CXS' : 'context-switch overhead',
+    'SEND-RESCHED' : 'IPI latency',
+    'TICK' : 'timer tick overhead',
+}
+
 def get_data(fname, scale, extend):
     data = load_binary_file(fname)
 
@@ -138,14 +152,22 @@ class OverheadPlotter(defapp.App):
         data, max_idx, min_idx, iqr_max, iqr_min = get_data(datafile,
                                                             scale,
                                                             self.options.extent)
+
+        if self.options.cutoff and len(data) > self.options.cutoff:
+            data = data[:self.options.cutoff]
+
         samples = data[min_idx:max_idx]
         discarded = (len(data) - len(samples)) / float(len(data)) * 100
         max_cost = data[-1]
 
         p = self.make_plot(name)
 
-        iqr_label = "IQR: extent=%d threshold=%.2fus filtered=%.2f%%" % \
-            (self.options.extent, iqr_max, discarded)
+
+        iqr_label = "\\n".join(["samples: total=%d filtered=%d (%.2f%%)",
+                                "IQR: extent=%d threshold=%.2fus",
+                                ]) % \
+            (len(data), len(data) -  len(samples), discarded,
+             self.options.extent, iqr_max)
 
         p.labels = [label(0.5, 0.9,
                           get_stats_label(samples),
@@ -157,8 +179,8 @@ class OverheadPlotter(defapp.App):
 
         p.setup_histogram(gap=1, boxwidth=1.0)
 
-        p.title = "measured overheads scheduler=%s; overhead=%s;  host=%s" \
-            % (conf['scheduler'], conf['overhead'], conf['host'])
+        p.title = "%s: measured %s for %s tasks per processor (host=%s)" \
+            % (conf['scheduler'], TXT[conf['overhead']], conf['n'], conf['host'])
 
         p.ylabel = "number of samples"
         p.xlabel = "overhead in microseconds (bin size = %.2fus)" \
-- 
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