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80 lines
2.4 KiB
D
Executable File
80 lines
2.4 KiB
D
Executable File
#!/usr/sbin/dtrace -CZs
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/*
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* py_profile.d - sample stack traces with Python translations using DTrace.
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* Written for the Python DTrace provider.
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*
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* $Id: py_profile.d 19 2007-09-12 07:47:59Z brendan $
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*
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* USAGE: py_profile.d { -p PID | -c cmd } # hit Ctrl-C to end
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*
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* This samples stack traces for the process specified. This stack trace
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* will cross the Python engine and system libraries, and insert
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* translations for Python stack frames where appropriate. This is best
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* explained with an example stack frame output,
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*
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* libpython2.4.so.1.0`PyEval_EvalFrame+0x2fbf
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* [ ./func_loop.py:5 (func_c) ]
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* libpython2.4.so.1.0`fast_function+0xa8
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* libpython2.4.so.1.0`call_function+0xda
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* libpython2.4.so.1.0`PyEval_EvalFrame+0xbdf
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* [ ./func_loop.py:11 (func_b) ]
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* libpython2.4.so.1.0`fast_function+0xa8
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* libpython2.4.so.1.0`call_function+0xda
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* libpython2.4.so.1.0`PyEval_EvalFrame+0xbdf
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* [ ./func_loop.py:14 (func_a) ]
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* libpython2.4.so.1.0`fast_function+0xa8
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* libpython2.4.so.1.0`call_function+0xda
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* libpython2.4.so.1.0`PyEval_EvalFrame+0xbdf
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* [ ./func_loop.py:16 (?) ]
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*
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* The lines in square brackets are the native Python frames, the rest
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* are the Python engine.
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*
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* COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
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*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at Docs/cddl1.txt
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* CDDL HEADER END
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*
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* 09-Sep-2007 Brendan Gregg Created this.
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*/
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#pragma D option quiet
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#pragma D option jstackstrsize=1024
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/*
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* Tunables
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*/
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#define DEPTH 10 /* stack depth, frames */
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#define RATE 1001 /* sampling rate, Hertz */
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#define TOP 25 /* number of stacks to output */
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dtrace:::BEGIN
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{
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printf("Sampling %d-level stacks at %d Hertz... Hit Ctrl-C to end.\n",
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DEPTH, RATE);
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}
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profile-RATE
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/pid == $target/
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{
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@stacks[jstack(DEPTH)] = count();
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}
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dtrace:::END
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{
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trunc(@stacks, TOP);
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printf("Top %d most frequently sampled stacks,\n", TOP);
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printa(@stacks);
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}
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