def parallel_overhead():
overheads = {}
for n in sizes:
serial_times = np.zeros(9, dtype='float64')
parallel_times = np.zeros(9, dtype='float64')
for i in range(9):
adj = gen_random_adj(n)
serial_times[i] = wrapper.fw_serial(adj, n)[1]
parallel_times[i] = wrapper.fw_parallel(adj, n, 1)[1]
overheads[n] = ((serial_times/parallel_times).mean(), (serial_times/parallel_times).std())
return overheads
def parallel_overhead():
overheads = {}
for n in sizes:
serial_times = np.zeros(9, dtype='float64')
parallel_times = np.zeros(9, dtype='float64')
for i in range(9):
adj = gen_random_adj(n)
serial_times[i] = wrapper.fw_serial(adj, n)[1]
parallel_times[i] = wrapper.fw_parallel(adj, n, 1)[1]
overheads[n] = ((serial_times / parallel_times).mean(),
(serial_times / parallel_times).std())
return overheads
def verify_expectations(self, expected, adj, name):
thread_cts = [1, 2, 4, 8, 16, 32]
serial_result, time = wrapper.fw_serial(adj, adj.shape[0])
if not np.all(serial_result == expected):
raise AssertionError('Serial version failed in {0}'.format(name))
failures = []
for t in thread_cts:
result = wrapper.fw_parallel(adj, adj.shape[0], t)[0]
if not np.all(result == expected):
print result
failures.append(t)
if len(failures) > 0:
raise AssertionError('Parallel version failed on T={0} in {1}'.format(failures, name))
def speedups():
spds = np.zeros((len(sizes), len(threads)), dtype='float64')
spd_stddevs = np.zeros((len(sizes), len(threads)), dtype='float64')
for (n_ind, n) in enumerate(sizes):
this_n_spds = np.zeros((9, len(threads)), dtype='float64')
for i in range(9):
adj = gen_random_adj(n)
serial_time = wrapper.fw_serial(adj, n)[1]
for (t_ind, t) in enumerate(threads):
p_time = wrapper.fw_parallel(adj, n, t)[1]
this_n_spds[i, t_ind] = serial_time / p_time
spds[n_ind] = this_n_spds.mean(0)
spd_stddevs[n_ind] = this_n_spds.std(0)
return spds, spd_stddevs
def verify_expectations(self, expected, adj, name):
thread_cts = [1, 2, 4, 8, 16, 32]
serial_result, time = wrapper.fw_serial(adj, adj.shape[0])
if not np.all(serial_result == expected):
raise AssertionError('Serial version failed in {0}'.format(name))
failures = []
for t in thread_cts:
result = wrapper.fw_parallel(adj, adj.shape[0], t)[0]
if not np.all(result == expected):
print result
failures.append(t)
if len(failures) > 0:
raise AssertionError(
'Parallel version failed on T={0} in {1}'.format(
failures, name))
def speedups():
spds = np.zeros((len(sizes), len(threads)), dtype='float64')
spd_stddevs = np.zeros((len(sizes), len(threads)), dtype='float64')
for (n_ind, n) in enumerate(sizes):
this_n_spds = np.zeros((9, len(threads)), dtype='float64')
for i in range(9):
adj = gen_random_adj(n)
serial_time = wrapper.fw_serial(adj, n)[1]
for (t_ind, t) in enumerate(threads):
p_time = wrapper.fw_parallel(adj, n, t)[1]
this_n_spds[i, t_ind] = serial_time / p_time
spds[n_ind] = this_n_spds.mean(0)
spd_stddevs[n_ind] = this_n_spds.std(0)
return spds, spd_stddevs