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"""
Utilities for running benchmarks.
Foo.
"""
import re
import serial
import serial.threaded
import subprocess
import time
class SerialReader(serial.threaded.Protocol):
def __init__(self):
self.recv_buf = ''
self.lines = []
def expect(self, num_chars):
self.recv_buf = ''
def __call__(self):
return self
def data_received(self, data):
try:
str_data = data.decode('UTF-8')
self.recv_buf += str_data
lines = self.recv_buf.split("\n\r")
if len(lines) > 1:
self.lines.extend(lines[:-1])
self.recv_buf = lines[-1]
except UnicodeDecodeError:
pass
#sys.stderr.write('UART output contains garbage: {data}\n'.format(data = data))
def get_lines(self):
ret = self.lines
self.lines = []
return ret
def get_line(self):
if len(self.lines):
ret = self.lines[-1]
self.lines = []
return ret
return None
class SerialMonitor:
def __init__(self, port, baud):
self.ser = serial.serial_for_url(port, do_not_open=True)
self.ser.baudrate = baud
self.ser.parity = 'N'
self.ser.rtscts = False
self.ser.xonxoff = False
self.check_command = None
try:
self.ser.open()
except serial.SerialException as e:
sys.stderr.write('Could not open serial port {}: {}\n'.format(self.ser.name, e))
sys.exit(1)
self.reader = SerialReader()
self.worker = serial.threaded.ReaderThread(self.ser, self.reader)
self.worker.start()
def run(self, timeout = 10):
time.sleep(timeout)
return self.reader.get_lines()
def close(self):
self.worker.stop()
self.ser.close()
class ShellMonitor:
def __init__(self, script):
self.script = script
def run(self, timeout = 4):
res = subprocess.run(['timeout', '{:d}s'.format(timeout), self.script],
stdout = subprocess.PIPE, stderr = subprocess.PIPE,
universal_newlines = True)
return res.stdout.split('\n')
def close(self):
pass
def get_info(arch, opts = []):
command = ['make', 'arch={}'.format(arch), 'info']
command.extend(opts)
res = subprocess.run(command, stdout = subprocess.PIPE, stderr = subprocess.PIPE,
universal_newlines = True)
if res.returncode != 0:
raise RuntimeError('make info Failure')
return res.stdout.split('\n')
def get_monitor(arch):
for line in get_info(arch):
if 'Monitor:' in line:
_, port, arg = line.split(' ')
if port == 'run':
return ShellMonitor(arg)
else:
return SerialMonitor(port, arg)
raise RuntimeError('Monitor failure')
def get_counter_limits(arch):
for line in get_info(arch):
match = re.match('Counter Overflow: ([^/]*)/(.*)', line)
if match:
overflow_value = int(match.group(1))
max_overflow = int(match.group(2))
return overflow_value, max_overflow
raise RuntimeError('Did not find Counter Overflow limits')
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