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add support for MPMD (multiple program, multiple data) launch mode #2

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add support for MPMD (multiple program, multiple data) launch mode #2

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29 changes: 27 additions & 2 deletions mpitx/mpitx.py
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Original file line number Diff line number Diff line change
Expand Up @@ -366,8 +366,33 @@ def notify_parent(port, token):
def launch_mpiexec(port, token):
nonlocal mpiexec_process
hosts = ["127.0.0.1"] + get_ip_addresses()
args = dict(commands=commands, hosts=hosts, port=port, token=token)
mpiexec_process = subprocess.Popen([mpiexec_cmd] + options + [this_cmd, child_subcmd, serialize(args)],
if ':' in commands:
# MPMD (multiple program, multiple data) launch mode looks like:
# mpiexec -genv WORLD_SIZE 2
# -np 1 -host localhost -env RANK 0 final_cmd : # 1st program
# -np 1 -host localhost -env RANK 1 final_cmd # 2nd program
commands_str = ' '.join(commands)
new_commands = []
for one_program_str in commands_str.split(':'):
one_program = one_program_str.split()
final_cmd_index = 0
for _ in range(len(one_program)):
if one_program[final_cmd_index].startswith('-env'):
final_cmd_index += 3
elif one_program[final_cmd_index].startswith('-'):
final_cmd_index += 2
else:
break
program_part1 = one_program[:final_cmd_index]
program_part2 = one_program[final_cmd_index:]
args = dict(commands=program_part2, hosts=hosts, port=port, token=token)
new_commands = new_commands + [':'] + program_part1 + [this_cmd, child_subcmd, serialize(args)]
new_commands = new_commands[1:]
mpiexec_process = subprocess.Popen([mpiexec_cmd] + options + new_commands,
start_new_session=True)
else:
args = dict(commands=commands, hosts=hosts, port=port, token=token)
mpiexec_process = subprocess.Popen([mpiexec_cmd] + options + [this_cmd, child_subcmd, serialize(args)],
start_new_session=True)

child_conns = establish_connection_on_parent(launch_mpiexec)
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