149 lines
3.1 KiB
D
Executable File
149 lines
3.1 KiB
D
Executable File
#!/usr/sbin/dtrace -Zs
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/*
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* j_stat.d - Java operation stats using DTrace.
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* Written for the Java hotspot DTrace provider.
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*
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* $Id: j_stat.d 64 2007-10-04 08:35:29Z claire $
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*
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* This traces activity from all Java processes on the system with hotspot
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* provider support (1.6.0). Method calls and object allocation are only
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* visible when using the flag "+ExtendedDTraceProbes". eg,
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* java -XX:+ExtendedDTraceProbes classfile
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*
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* USAGE: j_stat.d [interval [count]]
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*
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* FIELDS:
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* EXEC/s Java programs executed per second, including
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* those without Java provider support
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* THREAD/s Threads created, per second
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* METHOD/s Methods called, per second
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* OBJNEW/s Objects created, per second
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* CLOAD/s Class loads, per second
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* EXCP/s Exceptions raised, per second
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* GC/s Garbage collects, per second
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*
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* The numbers are per second counts for the interval specified. The default
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* interval is 1 second.
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*
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* If you see a count in "EXECS" but not in the other columns, then your
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* Java software is probably not running with the DTrace hotspot provider.
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*
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* If you see counts in "CLOAD" but not in "METHODS", then you Java
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* software probably isn't running with "+ExtendedDTraceProbes".
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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 defaultargs
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inline int SCREEN = 21;
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dtrace:::BEGIN
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{
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execs = threads = methods = objnew = cload = gc = exception = 0;
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lines = SCREEN + 1;
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interval = $1 ? $1 : 1;
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counts = $2 ? $2 : -1;
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secs = interval;
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first = 1;
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}
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profile:::tick-1sec
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{
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secs--;
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}
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/*
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* Print Header
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*/
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dtrace:::BEGIN,
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profile:::tick-1sec
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/first || (secs == 0 && lines > SCREEN)/
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{
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printf("%-20s %6s %8s %8s %8s %8s %6s %6s\n", "TIME", "EXEC/s",
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"THREAD/s", "METHOD/s", "OBJNEW/s", "CLOAD/s", "EXCP/s", "GC/s");
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lines = 0;
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first = 0;
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}
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/*
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* Tally Data
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*/
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proc:::exec-success
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/execname == "java"/
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{
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execs++;
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}
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hotspot*:::thread-start
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{
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threads++;
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}
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hotspot*:::method-entry
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{
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methods++;
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}
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hotspot*:::object-alloc
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{
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oalloc++;
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}
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hotspot*:::class-loaded
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{
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cload++;
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}
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hotspot*:::gc-begin
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{
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gc++;
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}
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hotspot*:::ExceptionOccurred-entry
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{
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exception++;
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}
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/*
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* Print Output
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*/
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profile:::tick-1sec
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/secs == 0/
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{
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printf("%-20Y %6d %8d %8d %8d %8d %6d %6d\n", walltimestamp,
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execs / interval, threads / interval, methods / interval,
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oalloc / interval, cload / interval, exception / interval,
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gc / interval);
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execs = threads = methods = oalloc = cload = gc = exception = 0;
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secs = interval;
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lines++;
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counts--;
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}
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/*
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* End
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*/
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profile:::tick-1sec
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/counts == 0/
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{
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exit(0);
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}
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