#!/usr/sbin/dtrace -Zs /* * js_objcpu.d - measure JavaScript object creation on-CPU time using DTrace. * Written for the JavaScript DTrace provider. * * $Id: js_objcpu.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ * * This traces JavaScript activity from all browsers running on the system * with JavaScript provider support. * * USAGE: js_objcpu.d # hit Ctrl-C to end * * Class names are printed if available. * * 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 dtrace:::BEGIN { printf("Tracing... Hit Ctrl-C to end.\n"); } javascript*:::object-create-start { self->vstart = vtimestamp; } javascript*:::object-create-done /self->vstart/ { this->oncpu = vtimestamp - self->vstart; @total = sum(this->oncpu); @dist[copyinstr(arg1)] = quantize(this->oncpu / 1000); self->vstart = 0; } dtrace:::END { normalize(@total, 1000000); printa("Total object creation on-CPU time (ms): %@d\n\n", @total); printf("Object creation on-CPU time distributions (us),\n"); printa(@dist); }