3 * j_events.d - count Java events using DTrace.
4 * Written for the Java hotspot DTrace provider.
6 * $Id: j_events.d 19 2007-09-12 07:47:59Z brendan $
8 * This traces activity from all Java processes on the system with hotspot
9 * provider support (1.6.0). Some events such as method calls are only
10 * visible when using the flag "+ExtendedDTraceProbes". eg,
11 * java -XX:+ExtendedDTraceProbes classfile
13 * USAGE: j_events.d # hit Ctrl-C to end
17 * EVENT Event name (DTrace probe name)
18 * COUNT Number of calls during sample
20 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
24 * The contents of this file are subject to the terms of the
25 * Common Development and Distribution License, Version 1.0 only
26 * (the "License"). You may not use this file except in compliance
29 * You can obtain a copy of the license at Docs/cddl1.txt
30 * or http://www.opensolaris.org/os/licensing.
31 * See the License for the specific language governing permissions
32 * and limitations under the License.
36 * 09-Sep-2007 Brendan Gregg Created this.
39 #pragma D option quiet
43 printf("Tracing... Hit Ctrl-C to end.\n");
46 /* this matches both hotspot and hotspot_jni providers */
49 @calls[pid, probename] = count();
54 printf(" %6s %-36s %8s\n", "PID", "EVENT", "COUNT");
55 printa(" %6d %-36s %@8d\n", @calls);