py_profile.d revision 235368
1235368Sgnn#!/usr/sbin/dtrace -CZs 2235368Sgnn/* 3235368Sgnn * py_profile.d - sample stack traces with Python translations using DTrace. 4235368Sgnn * Written for the Python DTrace provider. 5235368Sgnn * 6235368Sgnn * $Id: py_profile.d 19 2007-09-12 07:47:59Z brendan $ 7235368Sgnn * 8235368Sgnn * USAGE: py_profile.d { -p PID | -c cmd } # hit Ctrl-C to end 9235368Sgnn * 10235368Sgnn * This samples stack traces for the process specified. This stack trace 11235368Sgnn * will cross the Python engine and system libraries, and insert 12235368Sgnn * translations for Python stack frames where appropriate. This is best 13235368Sgnn * explained with an example stack frame output, 14235368Sgnn * 15235368Sgnn * libpython2.4.so.1.0`PyEval_EvalFrame+0x2fbf 16235368Sgnn * [ ./func_loop.py:5 (func_c) ] 17235368Sgnn * libpython2.4.so.1.0`fast_function+0xa8 18235368Sgnn * libpython2.4.so.1.0`call_function+0xda 19235368Sgnn * libpython2.4.so.1.0`PyEval_EvalFrame+0xbdf 20235368Sgnn * [ ./func_loop.py:11 (func_b) ] 21235368Sgnn * libpython2.4.so.1.0`fast_function+0xa8 22235368Sgnn * libpython2.4.so.1.0`call_function+0xda 23235368Sgnn * libpython2.4.so.1.0`PyEval_EvalFrame+0xbdf 24235368Sgnn * [ ./func_loop.py:14 (func_a) ] 25235368Sgnn * libpython2.4.so.1.0`fast_function+0xa8 26235368Sgnn * libpython2.4.so.1.0`call_function+0xda 27235368Sgnn * libpython2.4.so.1.0`PyEval_EvalFrame+0xbdf 28235368Sgnn * [ ./func_loop.py:16 (?) ] 29235368Sgnn * 30235368Sgnn * The lines in square brackets are the native Python frames, the rest 31235368Sgnn * are the Python engine. 32235368Sgnn * 33235368Sgnn * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 34235368Sgnn * 35235368Sgnn * CDDL HEADER START 36235368Sgnn * 37235368Sgnn * The contents of this file are subject to the terms of the 38235368Sgnn * Common Development and Distribution License, Version 1.0 only 39235368Sgnn * (the "License"). You may not use this file except in compliance 40235368Sgnn * with the License. 41235368Sgnn * 42235368Sgnn * You can obtain a copy of the license at Docs/cddl1.txt 43235368Sgnn * or http://www.opensolaris.org/os/licensing. 44235368Sgnn * See the License for the specific language governing permissions 45235368Sgnn * and limitations under the License. 46235368Sgnn * 47235368Sgnn * CDDL HEADER END 48235368Sgnn * 49235368Sgnn * 09-Sep-2007 Brendan Gregg Created this. 50235368Sgnn */ 51235368Sgnn 52235368Sgnn#pragma D option quiet 53235368Sgnn#pragma D option jstackstrsize=1024 54235368Sgnn 55235368Sgnn/* 56235368Sgnn * Tunables 57235368Sgnn */ 58235368Sgnn#define DEPTH 10 /* stack depth, frames */ 59235368Sgnn#define RATE 1001 /* sampling rate, Hertz */ 60235368Sgnn#define TOP 25 /* number of stacks to output */ 61235368Sgnn 62235368Sgnndtrace:::BEGIN 63235368Sgnn{ 64235368Sgnn printf("Sampling %d-level stacks at %d Hertz... Hit Ctrl-C to end.\n", 65235368Sgnn DEPTH, RATE); 66235368Sgnn} 67235368Sgnn 68235368Sgnnprofile-RATE 69235368Sgnn/pid == $target/ 70235368Sgnn{ 71235368Sgnn @stacks[jstack(DEPTH)] = count(); 72235368Sgnn} 73235368Sgnn 74235368Sgnndtrace:::END 75235368Sgnn{ 76235368Sgnn trunc(@stacks, TOP); 77235368Sgnn printf("Top %d most frequently sampled stacks,\n", TOP); 78235368Sgnn printa(@stacks); 79235368Sgnn} 80