b504d7f687
Remove mixed indentation in Python scripts. Revert to either all tabs (most common form) or all spaces (4 or 8) depending on what was the intent of the original commit. This is necessary to complete Python3 support as it will flag an error if it encounters mixed indentation. Signed-off-by: Tony Jones <tonyj@suse.de> Link: http://lkml.kernel.org/r/20190302011903.2416-2-tonyj@suse.de Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
51 lines
1.5 KiB
Python
51 lines
1.5 KiB
Python
# futex contention
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# (c) 2010, Arnaldo Carvalho de Melo <acme@redhat.com>
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# Licensed under the terms of the GNU GPL License version 2
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#
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# Translation of:
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#
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# http://sourceware.org/systemtap/wiki/WSFutexContention
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#
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# to perf python scripting.
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#
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# Measures futex contention
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import os, sys
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sys.path.append(os.environ['PERF_EXEC_PATH'] + '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
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from Util import *
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process_names = {}
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thread_thislock = {}
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thread_blocktime = {}
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lock_waits = {} # long-lived stats on (tid,lock) blockage elapsed time
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process_names = {} # long-lived pid-to-execname mapping
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def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
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nr, uaddr, op, val, utime, uaddr2, val3):
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cmd = op & FUTEX_CMD_MASK
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if cmd != FUTEX_WAIT:
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return # we don't care about originators of WAKE events
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process_names[tid] = comm
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thread_thislock[tid] = uaddr
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thread_blocktime[tid] = nsecs(s, ns)
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def syscalls__sys_exit_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
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nr, ret):
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if thread_blocktime.has_key(tid):
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elapsed = nsecs(s, ns) - thread_blocktime[tid]
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add_stats(lock_waits, (tid, thread_thislock[tid]), elapsed)
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del thread_blocktime[tid]
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del thread_thislock[tid]
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def trace_begin():
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print "Press control+C to stop and show the summary"
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def trace_end():
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for (tid, lock) in lock_waits:
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min, max, avg, count = lock_waits[tid, lock]
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print "%s[%d] lock %x contended %d times, %d avg ns" % \
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(process_names[tid], tid, lock, count, avg)
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