#!/usr/sbin/dtrace -CZs /* * py_profile.d - sample stack traces with Python translations using DTrace. * Written for the Python DTrace provider. * * $Id: py_profile.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ * * USAGE: py_profile.d { -p PID | -c cmd } # hit Ctrl-C to end * * This samples stack traces for the process specified. This stack trace * will cross the Python engine and system libraries, and insert * translations for Python stack frames where appropriate. This is best * explained with an example stack frame output, * * libpython2.4.so.1.0`PyEval_EvalFrame+0x2fbf * [ ./func_loop.py:5 (func_c) ] * libpython2.4.so.1.0`fast_function+0xa8 * libpython2.4.so.1.0`call_function+0xda * libpython2.4.so.1.0`PyEval_EvalFrame+0xbdf * [ ./func_loop.py:11 (func_b) ] * libpython2.4.so.1.0`fast_function+0xa8 * libpython2.4.so.1.0`call_function+0xda * libpython2.4.so.1.0`PyEval_EvalFrame+0xbdf * [ ./func_loop.py:14 (func_a) ] * libpython2.4.so.1.0`fast_function+0xa8 * libpython2.4.so.1.0`call_function+0xda * libpython2.4.so.1.0`PyEval_EvalFrame+0xbdf * [ ./func_loop.py:16 (?) ] * * The lines in square brackets are the native Python frames, the rest * are the Python engine. * * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. * * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at Docs/cddl1.txt * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * CDDL HEADER END * * 09-Sep-2007 Brendan Gregg Created this. */ #pragma D option quiet #pragma D option jstackstrsize=1024 /* * Tunables */ #define DEPTH 10 /* stack depth, frames */ #define RATE 1001 /* sampling rate, Hertz */ #define TOP 25 /* number of stacks to output */ dtrace:::BEGIN { printf("Sampling %d-level stacks at %d Hertz... Hit Ctrl-C to end.\n", DEPTH, RATE); } profile-RATE /pid == $target/ { @stacks[jstack(DEPTH)] = count(); } dtrace:::END { trunc(@stacks, TOP); printf("Top %d most frequently sampled stacks,\n", TOP); printa(@stacks); }