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"""A test that subscribes to NumPy arrays.
Uses REQ/REP (on PUB/SUB socket + 1) to synchronize
"""
#-----------------------------------------------------------------------------
# Copyright (c) 2010 Brian Granger
#
# Distributed under the terms of the New BSD License. The full license is in
# the file COPYING.BSD, distributed as part of this software.
#-----------------------------------------------------------------------------
import sys
import time
import zmq
import numpy
def sync(connect_to):
# use connect socket + 1
sync_with = ':'.join(connect_to.split(':')[:-1] +
[str(int(connect_to.split(':')[-1]) + 1)]
)
ctx = zmq.Context.instance()
s = ctx.socket(zmq.REQ)
s.connect(sync_with)
s.send('READY')
s.recv()
def main():
if len (sys.argv) != 3:
print 'usage: subscriber <connect_to> <array-count>'
sys.exit (1)
try:
connect_to = sys.argv[1]
array_count = int (sys.argv[2])
except (ValueError, OverflowError), e:
print 'array-count must be integers'
sys.exit (1)
ctx = zmq.Context()
s = ctx.socket(zmq.SUB)
s.connect(connect_to)
s.setsockopt(zmq.SUBSCRIBE,'')
sync(connect_to)
start = time.clock()
print "Receiving arrays..."
for i in range(array_count):
a = s.recv_pyobj()
print " Done."
end = time.clock()
elapsed = (end - start) * 1000000
if elapsed == 0:
elapsed = 1
throughput = (1000000.0 * float (array_count)) / float (elapsed)
message_size = a.nbytes
megabits = float (throughput * message_size * 8) / 1000000
print "message size: %.0f [B]" % (message_size, )
print "array count: %.0f" % (array_count, )
print "mean throughput: %.0f [msg/s]" % (throughput, )
print "mean throughput: %.3f [Mb/s]" % (megabits, )
time.sleep(1.0)
if __name__ == "__main__":
main()