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$ ps -e | grep perl
68028 ttys001    0:00.32 perl -I../test_mce pm-cb-g -m  # main process
...
68030 ttys001    0:00.01 perl -I../test_mce pm-cb-g -m  # control
68031 ttys001    0:00.09 perl -I../test_mce pm-cb-g -m  # communicate

$ ps -e | grep perl
68035 ttys001    0:00.29 perl -I../test_mce pm-cb-g -M  # main process
68036 ttys001    0:00.01 perl -I../test_mce pm-cb-g -M  # control
68037 ttys001    0:00.09 perl -I../test_mce pm-cb-g -M  # communicate