diff options
Diffstat (limited to 'tools/perf/scripts/python')
| -rw-r--r-- | tools/perf/scripts/python/futex-contention.py | 51 |
1 files changed, 28 insertions, 23 deletions
diff --git a/tools/perf/scripts/python/futex-contention.py b/tools/perf/scripts/python/futex-contention.py index 0c4841acf75d..7e884d46f920 100644 --- a/tools/perf/scripts/python/futex-contention.py +++ b/tools/perf/scripts/python/futex-contention.py @@ -12,41 +12,46 @@ from __future__ import print_function -import os, sys -sys.path.append(os.environ['PERF_EXEC_PATH'] + '/scripts/python/Perf-Trace-Util/lib/Perf/Trace') +import os +import sys +sys.path.append(os.environ['PERF_EXEC_PATH'] + + '/scripts/python/Perf-Trace-Util/lib/Perf/Trace') from Util import * process_names = {} thread_thislock = {} thread_blocktime = {} -lock_waits = {} # long-lived stats on (tid,lock) blockage elapsed time -process_names = {} # long-lived pid-to-execname mapping +lock_waits = {} # long-lived stats on (tid,lock) blockage elapsed time +process_names = {} # long-lived pid-to-execname mapping + def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm, callchain, - nr, uaddr, op, val, utime, uaddr2, val3): - cmd = op & FUTEX_CMD_MASK - if cmd != FUTEX_WAIT: - return # we don't care about originators of WAKE events + nr, uaddr, op, val, utime, uaddr2, val3): + cmd = op & FUTEX_CMD_MASK + if cmd != FUTEX_WAIT: + return # we don't care about originators of WAKE events + + process_names[tid] = comm + thread_thislock[tid] = uaddr + thread_blocktime[tid] = nsecs(s, ns) - process_names[tid] = comm - thread_thislock[tid] = uaddr - thread_blocktime[tid] = nsecs(s, ns) def syscalls__sys_exit_futex(event, ctxt, cpu, s, ns, tid, comm, callchain, - nr, ret): - if tid in thread_blocktime: - elapsed = nsecs(s, ns) - thread_blocktime[tid] - add_stats(lock_waits, (tid, thread_thislock[tid]), elapsed) - del thread_blocktime[tid] - del thread_thislock[tid] + nr, ret): + if tid in thread_blocktime: + elapsed = nsecs(s, ns) - thread_blocktime[tid] + add_stats(lock_waits, (tid, thread_thislock[tid]), elapsed) + del thread_blocktime[tid] + del thread_thislock[tid] + def trace_begin(): - print("Press control+C to stop and show the summary") + print("Press control+C to stop and show the summary") -def trace_end(): - for (tid, lock) in lock_waits: - min, max, avg, count = lock_waits[tid, lock] - print("%s[%d] lock %x contended %d times, %d avg ns" % - (process_names[tid], tid, lock, count, avg)) +def trace_end(): + for (tid, lock) in lock_waits: + min, max, avg, count = lock_waits[tid, lock] + print("%s[%d] lock %x contended %d times, %d avg ns [max: %d ns, min %d ns]" % + (process_names[tid], tid, lock, count, avg, max, min)) |