forked from M-Labs/artiq
b6c12f2f56
Even when given exclusive access to our buildserver it still gives false positives with 1ms.
391 lines
10 KiB
Python
391 lines
10 KiB
Python
# Copyright (C) 2014, 2015 M-Labs Limited
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# Copyright (C) 2014, 2015 Robert Jordens <jordens@gmail.com>
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import os, unittest
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from math import sqrt
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from artiq.experiment import *
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from artiq.test.hardware_testbench import ExperimentCase
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from artiq.coredevice import exceptions
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artiq_low_latency = os.getenv("ARTIQ_LOW_LATENCY")
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class PulseNotReceived(Exception):
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pass
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class RTT(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("ttl_inout")
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@kernel
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def run(self):
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self.core.reset()
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self.ttl_inout.output()
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delay(1*us)
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with interleave:
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# make sure not to send two commands into the same RTIO
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# channel with the same timestamp
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self.ttl_inout.gate_rising(5*us)
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with sequential:
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delay(1*us)
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t0 = now_mu()
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self.ttl_inout.pulse(1*us)
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t1 = self.ttl_inout.timestamp_mu()
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if t1 < 0:
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raise PulseNotReceived()
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self.set_dataset("rtt", mu_to_seconds(t1 - t0))
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class Loopback(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("loop_in")
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self.setattr_device("loop_out")
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@kernel
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def run(self):
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self.core.reset()
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self.loop_in.input()
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self.loop_out.off()
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delay(1*us)
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with parallel:
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self.loop_in.gate_rising(2*us)
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with sequential:
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delay(1*us)
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t0 = now_mu()
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self.loop_out.pulse(1*us)
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t1 = self.loop_in.timestamp_mu()
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if t1 < 0:
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raise PulseNotReceived()
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self.set_dataset("rtt", mu_to_seconds(t1 - t0))
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class ClockGeneratorLoopback(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("loop_clock_in")
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self.setattr_device("loop_clock_out")
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@kernel
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def run(self):
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self.core.reset()
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self.loop_clock_in.input()
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self.loop_clock_out.stop()
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delay(10*us)
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with parallel:
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self.loop_clock_in.gate_rising(10*us)
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with sequential:
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delay(200*ns)
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self.loop_clock_out.set(1*MHz)
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self.set_dataset("count", self.loop_clock_in.count())
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class PulseRate(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("ttl_out")
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@kernel
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def run(self):
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self.core.reset()
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dt = seconds_to_mu(300*ns)
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while True:
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for i in range(10000):
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try:
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self.ttl_out.pulse_mu(dt)
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delay_mu(dt)
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except RTIOUnderflow:
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dt += 1
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self.core.break_realtime()
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break
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else:
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self.set_dataset("pulse_rate", mu_to_seconds(dt))
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return
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class PulseRateDDS(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("core_dds")
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self.setattr_device("dds0")
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self.setattr_device("dds1")
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@kernel
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def run(self):
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self.core.reset()
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dt = seconds_to_mu(5*us)
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while True:
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delay(10*ms)
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for i in range(1250):
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try:
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with self.core_dds.batch:
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self.dds0.set(100*MHz)
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self.dds1.set(100*MHz)
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delay_mu(dt)
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except RTIOUnderflow:
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dt += 100
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self.core.break_realtime()
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break
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else:
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self.set_dataset("pulse_rate", mu_to_seconds(dt//2))
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return
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class Watchdog(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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@kernel
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def run(self):
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with watchdog(50*ms):
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while True:
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pass
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class LoopbackCount(EnvExperiment):
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def build(self, npulses):
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self.setattr_device("core")
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self.setattr_device("loop_in")
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self.setattr_device("loop_out")
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self.npulses = npulses
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def set_count(self, count):
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self.set_dataset("count", count)
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@kernel
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def run(self):
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self.core.reset()
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self.loop_in.input()
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self.loop_out.output()
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delay(5*us)
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with parallel:
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self.loop_in.gate_rising(10*us)
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with sequential:
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for i in range(self.npulses):
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delay(25*ns)
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self.loop_out.pulse(25*ns)
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self.set_dataset("count", self.loop_in.count())
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class Underflow(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("ttl_out")
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@kernel
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def run(self):
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self.core.reset()
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while True:
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delay(25*ns)
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self.ttl_out.pulse(25*ns)
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class SequenceError(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("ttl_out")
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@kernel
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def run(self):
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self.core.reset()
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t = now_mu()
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self.ttl_out.pulse(25*us)
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at_mu(t)
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self.ttl_out.pulse(25*us)
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class Collision(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("ttl_out_serdes")
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@kernel
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def run(self):
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self.core.reset()
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delay(5*ms) # make sure we won't get underflow
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for i in range(16):
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self.ttl_out_serdes.pulse_mu(1)
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delay_mu(1)
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class AddressCollision(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("loop_in")
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@kernel
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def run(self):
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self.core.reset()
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self.loop_in.input()
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self.loop_in.pulse(10*us)
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class TimeKeepsRunning(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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@kernel
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def run(self):
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self.core.reset()
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self.set_dataset("time_at_start", now_mu())
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class Handover(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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@kernel
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def k(self, var):
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self.set_dataset(var, now_mu())
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delay_mu(1234)
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def run(self):
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self.k("t1")
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self.k("t2")
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class DummyException(Exception):
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pass
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class HandoverException(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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@kernel
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def k(self, var):
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self.set_dataset(var, now_mu())
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delay_mu(1234)
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raise DummyException()
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def run(self):
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try:
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self.k("t1")
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except DummyException:
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pass
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try:
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self.k("t2")
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except DummyException:
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pass
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class CoredeviceTest(ExperimentCase):
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def test_loopback(self):
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self.execute(Loopback)
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rtt = self.dataset_mgr.get("rtt")
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print(rtt)
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self.assertGreater(rtt, 0*ns)
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self.assertLess(rtt, 60*ns)
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def test_clock_generator_loopback(self):
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self.execute(ClockGeneratorLoopback)
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count = self.dataset_mgr.get("count")
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self.assertEqual(count, 10)
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def test_pulse_rate(self):
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"""Minimum interval for sustained TTL output switching"""
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self.execute(PulseRate)
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rate = self.dataset_mgr.get("pulse_rate")
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print(rate)
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self.assertGreater(rate, 100*ns)
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self.assertLess(rate, 700*ns)
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def test_pulse_rate_dds(self):
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"""Minimum interval for sustained DDS frequency switching"""
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self.execute(PulseRateDDS)
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rate = self.dataset_mgr.get("pulse_rate")
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print(rate)
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self.assertGreater(rate, 1*us)
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self.assertLess(rate, 6.2*us)
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def test_loopback_count(self):
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npulses = 2
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self.execute(LoopbackCount, npulses=npulses)
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count = self.dataset_mgr.get("count")
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self.assertEqual(count, npulses)
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def test_underflow(self):
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with self.assertRaises(RTIOUnderflow):
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self.execute(Underflow)
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def test_sequence_error(self):
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with self.assertRaises(RTIOSequenceError):
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self.execute(SequenceError)
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def test_collision(self):
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with self.assertRaises(RTIOCollision):
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self.execute(Collision)
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def test_address_collision(self):
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with self.assertRaises(RTIOCollision):
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self.execute(AddressCollision)
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def test_watchdog(self):
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# watchdog only works on the device
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with self.assertRaises(exceptions.WatchdogExpired):
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self.execute(Watchdog)
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@unittest.skipUnless(artiq_low_latency,
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"timings are dependent on CPU load and network conditions")
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def test_time_keeps_running(self):
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self.execute(TimeKeepsRunning)
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t1 = self.dataset_mgr.get("time_at_start")
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self.execute(TimeKeepsRunning)
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t2 = self.dataset_mgr.get("time_at_start")
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dead_time = mu_to_seconds(t2 - t1, self.device_mgr.get("core"))
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print(dead_time)
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self.assertGreater(dead_time, 1*ms)
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self.assertLess(dead_time, 2500*ms)
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def test_handover(self):
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self.execute(Handover)
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self.assertEqual(self.dataset_mgr.get("t1") + 1234,
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self.dataset_mgr.get("t2"))
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def test_handover_exception(self):
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self.execute(HandoverException)
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self.assertEqual(self.dataset_mgr.get("t1") + 1234,
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self.dataset_mgr.get("t2"))
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class RPCTiming(EnvExperiment):
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def build(self, repeats=100):
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self.setattr_device("core")
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self.repeats = repeats
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def nop(self):
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pass
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@kernel
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def bench(self):
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for i in range(self.repeats):
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t1 = self.core.get_rtio_counter_mu()
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self.nop()
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t2 = self.core.get_rtio_counter_mu()
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self.ts[i] = mu_to_seconds(t2 - t1)
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def run(self):
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self.ts = [0. for _ in range(self.repeats)]
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self.bench()
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mean = sum(self.ts)/self.repeats
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self.set_dataset("rpc_time_stddev", sqrt(
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sum([(t - mean)**2 for t in self.ts])/self.repeats))
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self.set_dataset("rpc_time_mean", mean)
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class RPCTest(ExperimentCase):
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@unittest.skipUnless(artiq_low_latency,
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"timings are dependent on CPU load and network conditions")
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def test_rpc_timing(self):
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self.execute(RPCTiming)
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self.assertGreater(self.dataset_mgr.get("rpc_time_mean"), 100*ns)
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self.assertLess(self.dataset_mgr.get("rpc_time_mean"), 15*ms)
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self.assertLess(self.dataset_mgr.get("rpc_time_stddev"), 2*ms)
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