simulation: add simulation with scheduler (#71)

- Add new field in test.Event: HistoryIndex
   HistoryIndex allow us to access them by their position in event history.
- Record local time in test.App when receiving events.
- Add statisitics module for slices of test.Event.
- add new command line utility *dexcon-simulation-with-scheduler
   to verify the execution time of core.Consensus.

1 files changed, 18 insertions, 1 deletions

diff --git a/README.md b/README.md
index 02a7d59..d7f54ac 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,8 @@ make pre-submit
 
 ## Simulation
 
+### Simulation with Nodes connected by HTTP
+
 1. Setup the configuration under `./test.toml`
 2. Compile and install the cmd `dexon-simulation`
 
@@ -49,8 +51,23 @@ make pre-submit
 make
 ```
 
-4. Run simulation:
+3. Run simulation:
 
 ```
 dexcon-simulation -config test.toml -init
 ```
+
+### Simulation with test.Scheduler
+
+1. Setup the configuration under `./test.toml`
+2. Compile and install the cmd `dexon-simulation-with-scheduler`
+
+```
+make
+```
+
+3. Run simulation with 10 workers:
+
+```
+dexcon-simulation-with-scheduler -config test.toml -workercount 10
+```