| 1 | # syscall_by_pid.py |
| 2 | # |
| 3 | # Babeltrace syscall by pid example script |
| 4 | # |
| 5 | # Copyright 2012 EfficiOS Inc. |
| 6 | # |
| 7 | # Author: Danny Serres <danny.serres@efficios.com> |
| 8 | # |
| 9 | # Permission is hereby granted, free of charge, to any person obtaining a copy |
| 10 | # of this software and associated documentation files (the "Software"), to deal |
| 11 | # in the Software without restriction, including without limitation the rights |
| 12 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 13 | # copies of the Software, and to permit persons to whom the Software is |
| 14 | # furnished to do so, subject to the following conditions: |
| 15 | # |
| 16 | # The above copyright notice and this permission notice shall be included in |
| 17 | # all copies or substantial portions of the Software. |
| 18 | |
| 19 | # The script checks the number of events in the trace |
| 20 | # and outputs a table and a .svg histogram for the specified |
| 21 | # range (microseconds) or the total trace if no range specified. |
| 22 | # The graph is generated using the cairoplot module. |
| 23 | |
| 24 | # The script checks all syscall in the trace and prints a list |
| 25 | # showing the number of systemcalls executed by each PID |
| 26 | # ordered from greatest to least number of syscalls. |
| 27 | # The trace needs PID context (lttng add-context -k -t pid) |
| 28 | |
| 29 | import sys |
| 30 | from babeltrace import * |
| 31 | from output_format_modules.pprint_table import pprint_table as pprint |
| 32 | |
| 33 | if len(sys.argv) < 2 : |
| 34 | raise TypeError("Usage: python syscalls_by_pid.py path/to/trace") |
| 35 | |
| 36 | ctx = Context() |
| 37 | ret = ctx.add_trace(sys.argv[1], "ctf") |
| 38 | if ret is None: |
| 39 | raise IOError("Error adding trace") |
| 40 | |
| 41 | data = {} |
| 42 | |
| 43 | # Setting iterator |
| 44 | bp = IterPos(SEEK_BEGIN) |
| 45 | ctf_it = ctf.Iterator(ctx, bp) |
| 46 | |
| 47 | # Reading events |
| 48 | event = ctf_it.read_event() |
| 49 | while event is not None: |
| 50 | if event.get_name().find("sys") >= 0: |
| 51 | # Getting scope definition |
| 52 | sco = event.get_top_level_scope(ctf.scope.STREAM_EVENT_CONTEXT) |
| 53 | if sco is None: |
| 54 | print("ERROR: Cannot get definition scope for {}".format( |
| 55 | event.get_name())) |
| 56 | else: |
| 57 | # Getting PID |
| 58 | pid_field = event.get_field(sco, "_pid") |
| 59 | pid = pid_field.get_int64() |
| 60 | |
| 61 | if ctf.field_error(): |
| 62 | print("ERROR: Missing PID info for sched_switch".format( |
| 63 | event.get_name())) |
| 64 | elif pid in data: |
| 65 | data[pid] += 1 |
| 66 | else: |
| 67 | data[pid] = 1 |
| 68 | # Next event |
| 69 | ret = ctf_it.next() |
| 70 | if ret < 0: |
| 71 | break |
| 72 | event = ctf_it.read_event() |
| 73 | |
| 74 | del ctf_it |
| 75 | |
| 76 | # Setting table for output |
| 77 | table = [] |
| 78 | for item in data: |
| 79 | table.append([data[item], item]) # [count, pid] |
| 80 | table.sort(reverse = True) # [big count first, pid] |
| 81 | for i in range(len(table)): |
| 82 | table[i].reverse() # [pid, big count first] |
| 83 | table.insert(0, ["PID", "SYSCALL COUNT"]) |
| 84 | pprint(table) |