dtrace: description 'fbt::set_mcontext:entry' matched 1 probe
^C


               12
root@talos:/nest/jhibbits # 
root@talos:/nest/jhibbits # dtrace -n 'fbt::set_mcontext:entry{ @[stack()] = count();}'
dtrace: description 'fbt::set_mcontext:entry' matched 1 probe
^C


                1
root@talos:/nest/jhibbits # 
root@talos:/nest/jhibbits # dtrace -n 'fbt::set_mcontext:entry{ @[stack()] = count();}'
dtrace: description 'fbt::set_mcontext:entry' matched 1 probe
^C


                6
root@talos:/nest/jhibbits # dtrace -n 'fbt::set_mcontext:entry{ @[stack()] = count();}'
dtrace: description 'fbt::set_mcontext:entry' matched 1 probe
^C


                8