configure bandwidth in mbps

Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>

DAS/simulator.py

@@ -81,7 +81,7 @@ class Simulator:
                     end   = offset+((j+1)*self.shape.chi*self.shape.vpn2)
                 r = rows[start:end]
                 c = columns[start:end]
-                val = Validator(i, int(not i!=0), self.logger, self.shape, r, c)
+                val = Validator(i, int(not i!=0), self.logger, self.shape, self.config, r, c)
                 self.logger.debug("Node %d has row IDs: %s" % (val.ID, val.rowIDs), extra=self.format)
                 self.logger.debug("Node %d has column IDs: %s" % (val.ID, val.columnIDs), extra=self.format)
                 assignedRows = assignedRows + list(r)
@@ -90,7 +90,7 @@ class Simulator:
                 self.nodeColumns.append(val.columnIDs)
 
             else:
-                val = Validator(i, int(not i!=0), self.logger, self.shape)
+                val = Validator(i, int(not i!=0), self.logger, self.shape, self.config)
             if i == self.proposerID:
                 val.initBlock()
             else:

DAS/validator.py

@@ -38,7 +38,7 @@ class Validator:
         """It returns the validator ID."""
         return str(self.ID)
 
-    def __init__(self, ID, amIproposer, logger, shape, rows = None, columns = None):
+    def __init__(self, ID, amIproposer, logger, shape, config, rows = None, columns = None):
         """It initializes the validator with the logger shape and rows/columns.
 
             If rows/columns are specified these are observed, otherwise (default)
@@ -87,15 +87,16 @@ class Validator:
         self.statsRxDupInSlot = 0
         self.statsRxDupPerSlot = []
 
-        # Set uplink bandwidth. In segments (~560 bytes) per timestep (50ms?)
-        # 1 Mbps ~= 1e6 / 20 / 8 / 560 ~= 11
-        # TODO: this should be a parameter
+        # Set uplink bandwidth. 
+        # Assuming segments of ~560 bytes and timesteps of 50ms, we get
+        # 1 Mbps ~= 1e6 mbps * 0.050 s / (560*8) bits ~= 11 segments/timestep
         if self.amIproposer:
             self.bwUplink = shape.bwUplinkProd
         elif self.nodeClass == 1:
             self.bwUplink = shape.bwUplink1
         else:
             self.bwUplink = shape.bwUplink2
+        self.bwUplink *= 1e3 / 8 * config.stepDuration / config.segmentSize
 
         self.repairOnTheFly = True
         self.sendLineUntil = (self.shape.blockSize + 1) // 2 # stop sending on a p2p link if at least this amount of samples passed

smallConf.py

@@ -69,15 +69,17 @@ class1ratios = [0.8]
 validatorsPerNode1 = [1]
 validatorsPerNode2 = [500]
 
-# Set uplink bandwidth. In segments (~560 bytes) per timestep (50ms?)
-# 1 Mbps ~= 1e6 / 20 / 8 / 560 ~= 11
-bwUplinksProd = [2200]
-bwUplinks1 = [110]
-bwUplinks2 = [2200]
+# Set uplink bandwidth in megabits/second
+bwUplinksProd = [200]
+bwUplinks1 = [10]
+bwUplinks2 = [200]
 
 # Step duration in miliseconds (Classic RTT is about 100ms)
 stepDuration = 50
 
+# Segment size in bytes (with proof)
+segmentSize = 560
+
 # Set to True if you want your run to be deterministic, False if not
 deterministic = True