Added advanced Heavy Hitter Detection example (#136)

* Added advanced Heavy Hitter Detection example

* Changed directory location

* Restored skeleton version

* Added files for common run infra with the other tutorials

* Updated readme

* Autogenerate setup rules

* Commends in simple_router.p4

* Fix typos

* Removed commended out lines

Teaching/Stanford_CS344_2018/setup.py

@@ -0,0 +1,21 @@
+import os
+from shutil import copyfile
+
+unit_duration = 20 # log_2 of unit duration (so 2**unit_duration)
+total_time_bits = 48
+log_units = 3 # log_2 of number of units
+units = 2**log_units
+threshold = 8*1000.0 # in bytes
+
+copyfile('simple_router.config.template', 'simple_router.config')
+
+with open('simple_router.config', 'a') as fd:
+    time_mask = (2**(unit_duration+log_units)-1) - (2**unit_duration -1)
+    for unit in range(units):
+        time_value = unit*2**unit_duration
+        if unit < units/2:
+            unit_threshold = int((unit+1) * threshold / units + threshold/2 )
+        else:
+            unit_threshold = int((unit+1) * threshold / units)
+        fd.write('table_add threshold_table set_threshold %d&&&%d => %d 0\n' % (time_value, time_mask, unit_threshold))
+