Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) # futex contention
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) # (c) 2010, Arnaldo Carvalho de Melo <acme@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) # Licensed under the terms of the GNU GPL License version 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) # Translation of:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) # http://sourceware.org/systemtap/wiki/WSFutexContention
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) # to perf python scripting.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) # Measures futex contention
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) from __future__ import print_function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) import os
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) import sys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) sys.path.append(os.environ['PERF_EXEC_PATH'] +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)                 '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) from Util import *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) process_names = {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) thread_thislock = {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) thread_blocktime = {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) lock_waits = {}  # long-lived stats on (tid,lock) blockage elapsed time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) process_names = {}  # long-lived pid-to-execname mapping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)                               nr, uaddr, op, val, utime, uaddr2, val3):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)     cmd = op & FUTEX_CMD_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)     if cmd != FUTEX_WAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)         return  # we don't care about originators of WAKE events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)     process_names[tid] = comm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)     thread_thislock[tid] = uaddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)     thread_blocktime[tid] = nsecs(s, ns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) def syscalls__sys_exit_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)                              nr, ret):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)     if tid in thread_blocktime:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)         elapsed = nsecs(s, ns) - thread_blocktime[tid]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)         add_stats(lock_waits, (tid, thread_thislock[tid]), elapsed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)         del thread_blocktime[tid]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)         del thread_thislock[tid]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) def trace_begin():
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)     print("Press control+C to stop and show the summary")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) def trace_end():
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)     for (tid, lock) in lock_waits:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)         min, max, avg, count = lock_waits[tid, lock]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)         print("%s[%d] lock %x contended %d times, %d avg ns [max: %d ns, min %d ns]" %
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)               (process_names[tid], tid, lock, count, avg, max, min))