Data commit

Task/Rate-counter/Python/rate-counter.py

@@ -0,0 +1,58 @@
+import subprocess
+import time
+
+class Tlogger(object):
+    def __init__(self):
+        self.counts = 0
+        self.tottime = 0.0
+        self.laststart = 0.0
+        self.lastreport = time.time()
+
+    def logstart(self):
+        self.laststart = time.time()
+
+    def logend(self):
+        self.counts +=1
+        self.tottime += (time.time()-self.laststart)
+        if (time.time()-self.lastreport)>5.0:   # report once every 5 seconds
+           self.report()
+
+    def report(self):
+        if ( self.counts > 4*self.tottime):
+            print "Subtask execution rate: %f times/second"% (self.counts/self.tottime);
+        else:
+            print "Average execution time: %f seconds"%(self.tottime/self.counts);
+        self.lastreport = time.time()
+
+
+def taskTimer( n, subproc_args ):
+    logger = Tlogger()
+
+    for x in range(n):
+        logger.logstart()
+        p = subprocess.Popen(subproc_args)
+        p.wait()
+        logger.logend()
+    logger.report()
+
+
+import timeit
+import sys
+
+def main( ):
+
+    # for accurate timing of code segments
+    s = """j = [4*n for n in range(50)]"""
+    timer = timeit.Timer(s)
+    rzlts = timer.repeat(5, 5000)
+    for t in rzlts:
+        print "Time for 5000 executions of statement = ",t
+
+    # subprocess execution timing
+    print "#times:",sys.argv[1]
+    print "Command:",sys.argv[2:]
+    print ""
+    for k in range(3):
+       taskTimer( int(sys.argv[1]), sys.argv[2:])
+
+main()