Commit | Line | Data |
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300b4c33 | 1 | #!/usr/bin/env python2 |
24a3136a | 2 | # syscall_by_pid.py |
300b4c33 | 3 | # |
24a3136a | 4 | # Babeltrace syscall by pid example script |
300b4c33 | 5 | # |
24a3136a | 6 | # Copyright 2012 EfficiOS Inc. |
300b4c33 | 7 | # |
24a3136a | 8 | # Author: Danny Serres <danny.serres@efficios.com> |
300b4c33 | 9 | # |
24a3136a DS |
10 | # Permission is hereby granted, free of charge, to any person obtaining a copy |
11 | # of this software and associated documentation files (the "Software"), to deal | |
12 | # in the Software without restriction, including without limitation the rights | |
13 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
14 | # copies of the Software, and to permit persons to whom the Software is | |
15 | # furnished to do so, subject to the following conditions: | |
300b4c33 | 16 | # |
24a3136a DS |
17 | # The above copyright notice and this permission notice shall be included in |
18 | # all copies or substantial portions of the Software. | |
19 | ||
20 | # The script checks the number of events in the trace | |
21 | # and outputs a table and a .svg histogram for the specified | |
22 | # range (microseconds) or the total trace if no range specified. | |
23 | # The graph is generated using the cairoplot module. | |
24 | ||
25 | # The script checks all syscall in the trace and prints a list | |
26 | # showing the number of systemcalls executed by each PID | |
27 | # ordered from greatest to least number of syscalls. | |
28 | # The trace needs PID context (lttng add-context -k -t pid) | |
29 | ||
30 | import sys | |
31 | from babeltrace import * | |
32 | from output_format_modules.pprint_table import pprint_table as pprint | |
33 | ||
34 | if len(sys.argv) < 2 : | |
35 | raise TypeError("Usage: python syscalls_by_pid.py path/to/trace") | |
36 | ||
37 | ctx = Context() | |
38 | ret = ctx.add_trace(sys.argv[1], "ctf") | |
39 | if ret is None: | |
40 | raise IOError("Error adding trace") | |
41 | ||
42 | data = {} | |
43 | ||
44 | # Setting iterator | |
45 | bp = IterPos(SEEK_BEGIN) | |
46 | ctf_it = ctf.Iterator(ctx, bp) | |
47 | ||
48 | # Reading events | |
49 | event = ctf_it.read_event() | |
50 | while event is not None: | |
51 | if event.get_name().find("sys") >= 0: | |
52 | # Getting scope definition | |
53 | sco = event.get_top_level_scope(ctf.scope.STREAM_EVENT_CONTEXT) | |
54 | if sco is None: | |
55 | print("ERROR: Cannot get definition scope for {}".format( | |
56 | event.get_name())) | |
57 | else: | |
58 | # Getting PID | |
59 | pid_field = event.get_field(sco, "_pid") | |
60 | pid = pid_field.get_int64() | |
61 | ||
62 | if ctf.field_error(): | |
63 | print("ERROR: Missing PID info for sched_switch".format( | |
64 | event.get_name())) | |
65 | elif pid in data: | |
66 | data[pid] += 1 | |
67 | else: | |
68 | data[pid] = 1 | |
69 | # Next event | |
70 | ret = ctf_it.next() | |
71 | if ret < 0: | |
72 | break | |
73 | event = ctf_it.read_event() | |
74 | ||
75 | del ctf_it | |
76 | ||
77 | # Setting table for output | |
78 | table = [] | |
79 | for item in data: | |
80 | table.append([data[item], item]) # [count, pid] | |
81 | table.sort(reverse = True) # [big count first, pid] | |
82 | for i in range(len(table)): | |
83 | table[i].reverse() # [pid, big count first] | |
84 | table.insert(0, ["PID", "SYSCALL COUNT"]) | |
85 | pprint(table) |