Home | History | Annotate | Line # | Download | only in Python 
      1 #!/usr/sbin/dtrace -Zs
      2 /*
      3  * py_flowtime.d - snoop Python functions with flow and delta times.
      4  *                 Written for the Python DTrace provider.
      5  *
      6  * $Id: py_flowtime.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $
      7  *
      8  * This traces shell activity from Python programs on the system that are
      9  * running with Python provider support.
     10  *
     11  * USAGE: py_flowtime.d			# hit Ctrl-C to end
     12  *
     13  * This watches Python function entries and returns, and indents child
     14  * function calls.
     15  *
     16  * FIELDS:
     17  *		C		CPU-id
     18  *		TIME(us)	Time since boot, us
     19  *		FILE		Filename that this function belongs to
     20  *		DELTA(us)	Elapsed time from previous line to this line
     21  *		FUNC		Python function name
     22  *
     23  * LEGEND:
     24  *		->		function entry
     25  *		<-		function return
     26  *
     27  * Filename and function names are printed if available.
     28  *
     29  * WARNING: Watch the first column carefully, it prints the CPU-id. If it
     30  * changes, then it is very likely that the output has been shuffled.
     31  *
     32  * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
     33  *
     34  * CDDL HEADER START
     35  *
     36  *  The contents of this file are subject to the terms of the
     37  *  Common Development and Distribution License, Version 1.0 only
     38  *  (the "License").  You may not use this file except in compliance
     39  *  with the License.
     40  *
     41  *  You can obtain a copy of the license at Docs/cddl1.txt
     42  *  or http://www.opensolaris.org/os/licensing.
     43  *  See the License for the specific language governing permissions
     44  *  and limitations under the License.
     45  *
     46  * CDDL HEADER END
     47  *
     48  * 09-Sep-2007	Brendan Gregg	Created this.
     49  */
     50 
     51 #pragma D option quiet
     52 #pragma D option switchrate=10
     53 
     54 self int depth;
     55 
     56 self int last;
     57 
     58 dtrace:::BEGIN
     59 {
     60 	printf("%3s %-16s %-16s %9s  -- %s\n", "C", "TIME(us)", "FILE",
     61 	    "DELTA(us)", "FUNC");
     62 }
     63 
     64 python*:::function-entry,
     65 python*:::function-return
     66 /self->last == 0/
     67 {
     68 	self->last = timestamp;
     69 }
     70 
     71 python*:::function-entry
     72 {
     73 	this->delta = (timestamp - self->last) / 1000;
     74 	printf("%3d %-16d %-16s %9d %*s-> %s\n", cpu, timestamp / 1000,
     75 	    basename(copyinstr(arg0)), this->delta, self->depth * 2, "",
     76 	    copyinstr(arg1));
     77 	self->depth++;
     78 	self->last = timestamp;
     79 }
     80 
     81 python*:::function-return
     82 {
     83 	this->delta = (timestamp - self->last) / 1000;
     84 	self->depth -= self->depth > 0 ? 1 : 0;
     85 	printf("%3d %-16d %-16s %9d %*s<- %s\n", cpu, timestamp / 1000,
     86 	    basename(copyinstr(arg0)), this->delta, self->depth * 2, "",
     87 	    copyinstr(arg1));
     88 	self->last = timestamp;
     89 }
     90