1235368Sgnn#!/usr/sbin/dtrace -CZs 2235368Sgnn/* 3235368Sgnn * j_cpudist.d - measure Java on-CPU times for different types of operation. 4235368Sgnn * Written for the Java hotspot DTrace provider. 5235368Sgnn * 6235368Sgnn * $Id: j_cpudist.d 59 2007-10-03 08:21:58Z brendan $ 7235368Sgnn * 8235368Sgnn * This traces activity from all Java processes on the system with hotspot 9235368Sgnn * provider support (1.6.0). Method calls are only visible when using the 10235368Sgnn * flag "+ExtendedDTraceProbes". eg, java -XX:+ExtendedDTraceProbes classfile 11235368Sgnn * 12235368Sgnn * USAGE: j_cpudist.d [top] # hit Ctrl-C to end 13235368Sgnn * 14235368Sgnn * The "top" optional argument will truncate the output for each report 15235368Sgnn * section to that many lines, with a default of 10. 16235368Sgnn * 17235368Sgnn * FIELDS: 18235368Sgnn * 1 Process ID 19235368Sgnn * 2 Type of call (method/gc) 20235368Sgnn * 3 Name of call 21235368Sgnn * 22235368Sgnn * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 23235368Sgnn * 24235368Sgnn * CDDL HEADER START 25235368Sgnn * 26235368Sgnn * The contents of this file are subject to the terms of the 27235368Sgnn * Common Development and Distribution License, Version 1.0 only 28235368Sgnn * (the "License"). You may not use this file except in compliance 29235368Sgnn * with the License. 30235368Sgnn * 31235368Sgnn * You can obtain a copy of the license at Docs/cddl1.txt 32235368Sgnn * or http://www.opensolaris.org/os/licensing. 33235368Sgnn * See the License for the specific language governing permissions 34235368Sgnn * and limitations under the License. 35235368Sgnn * 36235368Sgnn * CDDL HEADER END 37235368Sgnn * 38235368Sgnn * 09-Sep-2007 Brendan Gregg Created this. 39235368Sgnn */ 40235368Sgnn 41235368Sgnn#define TOP 10 /* default output truncation */ 42235368Sgnn#define B_FALSE 0 43235368Sgnn 44235368Sgnn#pragma D option quiet 45235368Sgnn#pragma D option defaultargs 46235368Sgnn 47235368Sgnndtrace:::BEGIN 48235368Sgnn{ 49235368Sgnn printf("Tracing... Hit Ctrl-C to end.\n"); 50235368Sgnn top = $1 != 0 ? $1 : TOP; 51235368Sgnn} 52235368Sgnn 53235368Sgnnhotspot*:::method-entry 54235368Sgnn{ 55235368Sgnn self->depth[arg0]++; 56235368Sgnn self->exclude[arg0, self->depth[arg0]] = 0; 57235368Sgnn self->method[arg0, self->depth[arg0]] = vtimestamp; 58235368Sgnn} 59235368Sgnn 60235368Sgnnhotspot*:::method-return 61235368Sgnn/self->method[arg0, self->depth[arg0]]/ 62235368Sgnn{ 63235368Sgnn this->oncpu_incl = vtimestamp - self->method[arg0, self->depth[arg0]]; 64235368Sgnn this->oncpu_excl = this->oncpu_incl - 65235368Sgnn self->exclude[arg0, self->depth[arg0]]; 66235368Sgnn self->method[arg0, self->depth[arg0]] = 0; 67235368Sgnn self->exclude[arg0, self->depth[arg0]] = 0; 68235368Sgnn 69235368Sgnn this->class = (char *)copyin(arg1, arg2 + 1); 70235368Sgnn this->class[arg2] = '\0'; 71235368Sgnn this->method = (char *)copyin(arg3, arg4 + 1); 72235368Sgnn this->method[arg4] = '\0'; 73235368Sgnn this->name = strjoin(strjoin(stringof(this->class), "."), 74235368Sgnn stringof(this->method)); 75235368Sgnn 76235368Sgnn @types_incl[pid, "method", this->name] = 77235368Sgnn quantize(this->oncpu_incl / 1000); 78235368Sgnn @types_excl[pid, "method", this->name] = 79235368Sgnn quantize(this->oncpu_excl / 1000); 80235368Sgnn 81235368Sgnn self->depth[arg0]--; 82235368Sgnn self->exclude[arg0, self->depth[arg0]] += this->oncpu_incl; 83235368Sgnn} 84235368Sgnn 85235368Sgnnhotspot*:::gc-begin 86235368Sgnn{ 87235368Sgnn self->gc = vtimestamp; 88235368Sgnn self->full = (boolean_t)arg0; 89235368Sgnn} 90235368Sgnn 91235368Sgnnhotspot*:::gc-end 92235368Sgnn/self->gc/ 93235368Sgnn{ 94235368Sgnn this->oncpu = vtimestamp - self->gc; 95235368Sgnn 96235368Sgnn @types[pid, "gc", self->full == B_FALSE ? "GC" : "Full GC"] = 97235368Sgnn quantize(this->oncpu / 1000); 98235368Sgnn 99235368Sgnn self->gc = 0; 100235368Sgnn self->full = 0; 101235368Sgnn} 102235368Sgnn 103235368Sgnndtrace:::END 104235368Sgnn{ 105235368Sgnn trunc(@types, top); 106235368Sgnn printf("\nTop %d on-CPU times (us),\n", top); 107235368Sgnn printa(" PID=%d, %s, %s %@d\n", @types); 108235368Sgnn 109235368Sgnn trunc(@types_excl, top); 110235368Sgnn printf("\nTop %d exclusive method on-CPU times (us),\n", top); 111235368Sgnn printa(" PID=%d, %s, %s %@d\n", @types_excl); 112235368Sgnn 113235368Sgnn trunc(@types_incl, top); 114235368Sgnn printf("\nTop %d inclusive method on-CPU times (us),\n", top); 115235368Sgnn printa(" PID=%d, %s, %s %@d\n", @types_incl); 116235368Sgnn} 117