freebsd-nq/cddl/contrib/dtracetoolkit/Java/j_stat.d
2012-05-12 21:25:48 +00:00

149 lines
3.1 KiB
D
Executable File

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