def benchmark_field_write_16(nb_operations, do_checksum=False):
"""
This method generate the P4 program to benchmark packet modification
:param nb_operations: the number of Set-Field actions
:type nb_operations: int
:returns: bool -- True if there is no error
"""
out_dir = 'output'
if not os.path.exists(out_dir):
os.makedirs(out_dir)
fwd_tbl = 'forward_table'
nb_headers = 1
program = add_headers_and_parsers_16(nb_headers, nb_operations)
program += add_ingress_block_16(nb_operations)
arguments = 'inout headers hdr, inout metadata meta, inout standard_metadata_t standard_metadata'
program += add_control_block_16('egress', '', '', '', arguments)
applies = '\t\tpacket.emit(hdr.ethernet);\n'
applies += '\t\tpacket.emit(hdr.ptp);\n'
for i in range(nb_headers):
applies += '\t\tpacket.emit(hdr.header_%d);\n' % i
program += add_control_block_16('DeparserImpl', '', '', applies,
'packet_out packet, in headers hdr')
program += add_control_block_16('verifyChecksum', '', '', '',
'inout headers hdr, inout metadata meta')
program += add_control_block_16('computeChecksum', '', '', '',
'inout headers hdr, inout metadata meta')
program += add_main_module()
with open('%s/main.p4' % out_dir, 'w') as out:
out.write(program)
action_name = 'mod_headers'
table_name = 'test_tbl'
commands = add_default_rule(table_name, '_nop')
# commands += add_rule(table_name, action_name, 319)
commands += add_default_rule(table_name, action_name)
commands += cli_commands(fwd_tbl)
with open('%s/commands.txt' % out_dir, 'w') as out:
out.write(commands)
copy_scripts(out_dir)
set_custom_field_pcap(nb_operations, out_dir, packet_size=256)
generate_pisces_command(nb_operations, out_dir, do_checksum)
return True
def benchmark_field_write(nb_operations, do_checksum=False):
"""
This method generate the P4 program to benchmark packet modification
:param nb_operations: the number of Set-Field actions
:type nb_operations: int
:returns: bool -- True if there is no error
"""
out_dir = 'output'
if not os.path.exists(out_dir):
os.makedirs(out_dir)
fwd_tbl = 'forward_table'
nb_headers = 1
program = add_headers_and_parsers(nb_headers, nb_operations)
program += nop_action_14()
program += forward_table()
action_name = 'mod_headers'
program += write_to_custom_header(action_name, nb_operations)
table_name = 'test_tbl'
match = 'ptp.reserved2 : exact;'
actions = '\t\t_nop;\n\t\t{0};'.format(action_name)
program += add_table(table_name, match, actions, 4, 14)
program += control(fwd_tbl, apply_table(table_name))
with open('%s/main.p4' % out_dir, 'w') as out:
out.write(program)
commands = add_default_rule(table_name, '_nop')
# commands += add_rule(table_name, action_name, 319)
commands += add_default_rule(table_name, action_name)
commands += cli_commands(fwd_tbl)
with open('%s/commands.txt' % out_dir, 'w') as out:
out.write(commands)
copy_scripts(out_dir)
set_custom_field_pcap(nb_operations, out_dir, packet_size=256)
generate_pisces_command(nb_operations, out_dir, do_checksum)
return True