From f7427dda395d85c19f2c28ce0aa01534eb506f92 Mon Sep 17 00:00:00 2001
From: Robert Jordens <jordens@gmail.com>
Date: Sun, 28 Jun 2015 20:08:39 -0600
Subject: [PATCH] test: make benchmarks unittest

---
 artiq/test/coredevice.py         | 150 ++++++++++++++++++++++---------
 artiq/test/hardware_testbench.py |   3 +-
 2 files changed, 109 insertions(+), 44 deletions(-)

diff --git a/artiq/test/coredevice.py b/artiq/test/coredevice.py
index 78d30142a..552fc26e1 100644
--- a/artiq/test/coredevice.py
+++ b/artiq/test/coredevice.py
@@ -1,56 +1,120 @@
-from artiq import *
-from artiq.test.hardware_testbench import *
+from math import sqrt
+
+from artiq.language import *
+from artiq.test.hardware_testbench import ExperimentCase
 from artiq.coredevice.runtime_exceptions import RTIOUnderflow
 
 
-class RTTTest(ExperimentCase):
-    class RTT(Experiment, AutoDB):
-        class DBKeys:
-            core = Device()
-            ttl_inout = Device()
-            rtt = Result()
+class RTT(Experiment, AutoDB):
+    class DBKeys:
+        core = Device()
+        ttl_inout = Device()
+        rtt = Result()
 
-        @kernel
-        def run(self):
-            self.ttl_inout.output()
-            delay(1*us)
-            t0 = now()
-            with parallel:
-                self.ttl_inout.gate_falling(2*us)
+    @kernel
+    def run(self):
+        self.ttl_inout.output()
+        delay(1*us)
+        with parallel:
+            self.ttl_inout.gate_rising(2*us)
+            with sequential:
+                delay(1*us)
+                t0 = now()
                 self.ttl_inout.pulse(1*us)
-            self.rtt = self.ttl_inout.timestamp() - t0
+        self.rtt = self.ttl_inout.timestamp() - t0
 
+
+class Loopback(Experiment, AutoDB):
+    class DBKeys:
+        core = Device()
+        loop_in = Device()
+        loop_out = Device()
+        rtt = Result()
+
+    @kernel
+    def run(self):
+        with parallel:
+            self.loop_in.gate_rising(2*us)
+            with sequential:
+                delay(1*us)
+                t0 = now()
+                self.loop_out.pulse(1*us)
+        self.rtt = self.loop_in.timestamp() - t0
+
+
+class PulseRate(Experiment, AutoDB):
+    class DBKeys:
+        core = Device()
+        loop_out = Device()
+        pulse_rate = Result()
+
+    @kernel
+    def run(self):
+        dt = time_to_cycles(1000*ns)
+        while True:
+            try:
+                for i in range(1000):
+                    self.loop_out.pulse(cycles_to_time(dt))
+                    delay(cycles_to_time(dt))
+            except RTIOUnderflow:
+                dt += 1
+                self.core.break_realtime()
+            else:
+                self.pulse_rate = cycles_to_time(2*dt)
+                break
+
+
+class CoredeviceTest(ExperimentCase):
     def test_rtt(self):
-        rtt = self.execute(self.RTT)["rtt"]
+        rtt = self.execute(RTT)["rtt"]
+        print(rtt)
+        self.assertGreater(rtt, 0*ns)
+        self.assertLess(rtt, 100*ns)
+
+    def test_loopback(self):
+        rtt = self.execute(Loopback)["rtt"]
+        print(rtt)
         self.assertGreater(rtt, 0*ns)
         self.assertLess(rtt, 40*ns)
 
-
-class PulseRateTest(ExperimentCase):
-    class PulseRate(Experiment, AutoDB):
-        class DBKeys:
-            core = Device()
-            loop_out = Device()
-            pulse_rate = Result()
-
-        @kernel
-        def run(self):
-            dt = time_to_cycles(1000*ns)
-            while True:
-                try:
-                    for i in range(1000):
-                        self.loop_out.pulse(cycles_to_time(dt))
-                        delay(cycles_to_time(dt))
-                except RTIOUnderflow:
-                    dt += 1
-                    self.core.break_realtime()
-                else:
-                    self.pulse_rate = cycles_to_time(2*dt)
-                    break
-
-    def test_rate(self):
-        rate = self.execute(self.PulseRate)["pulse_rate"]
+    def test_pulse_rate(self):
+        rate = self.execute(PulseRate)["pulse_rate"]
+        print(rate)
         self.assertGreater(rate, 100*ns)
-        self.assertLess(rate, 2000*ns)
+        self.assertLess(rate, 2500*ns)
 
 
+class RPCTiming(Experiment, AutoDB):
+    class DBKeys:
+        core = Device()
+        repeats = Argument(100)
+        rpc_time_mean = Result()
+        rpc_time_stddev = Result()
+
+    def nop(self, x):
+        pass
+
+    @kernel
+    def bench(self):
+        self.ts = [0. for _ in range(self.repeats)]
+        for i in range(self.repeats):
+            t1 = self.core.get_rtio_time()
+            self.nop(1)
+            t2 = self.core.get_rtio_time()
+            self.ts[i] = t2 - t1
+
+    def run(self):
+        self.bench()
+        mean = sum(self.ts)/self.repeats
+        self.rpc_time_stddev = sqrt(
+            sum([(t - mean)**2 for t in self.ts])/self.repeats)*s
+        self.rpc_time_mean = mean*s
+
+
+class RPCTest(ExperimentCase):
+    def test_rpc_timing(self):
+        res = self.execute(RPCTiming)
+        print(res)
+        self.assertGreater(res["rpc_time_mean"], 100*ns)
+        self.assertLess(res["rpc_time_mean"], 10*ms)
+        self.assertLess(res["rpc_time_stddev"], 1*ms)
diff --git a/artiq/test/hardware_testbench.py b/artiq/test/hardware_testbench.py
index 35bb100e9..bdb1e2e82 100644
--- a/artiq/test/hardware_testbench.py
+++ b/artiq/test/hardware_testbench.py
@@ -3,7 +3,7 @@ import sys
 import unittest
 import logging
 
-from artiq import *
+from artiq.language import *
 from artiq.protocols.file_db import FlatFileDB
 from artiq.master.worker_db import DBHub, ResultDB
 from artiq.frontend.artiq_run import (
@@ -33,6 +33,7 @@ class ExperimentCase(unittest.TestCase):
             try:
                 exp = cls(self.dbh, scheduler=sched, **kwargs)
             except KeyError as e:
+                # skip if ddb does not match requirements
                 raise unittest.SkipTest(*e.args)
             self.rdb.build()
             exp.run()