0N/ACopyright (c) 2003, 2005, Oracle
and/or its affiliates. All rights reserved.
0N/ARedistribution and use in source and binary forms, with or without
0N/Amodification, are permitted provided that the following conditions
2362N/A - Redistributions of source code must retain the above copyright
0N/A notice, this list of conditions and the following disclaimer.
0N/A - Redistributions in binary form must reproduce the above copyright
0N/A notice, this list of conditions and the following disclaimer in the
0N/A documentation
and/or other materials provided with the distribution.
0N/A - Neither the name of Oracle nor the names of its
0N/A contributors may be used to endorse or promote products derived
0N/A from this software without specific prior written permission.
0N/ATHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
0N/AIS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
0N/ATHE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
2362N/APURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
2362N/ACONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
2362N/AEXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
0N/APROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
0N/APROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
0N/ALIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
0N/ANEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
0N/ASOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0N/AHeader for -agentlib:hprof (or -Xrunhprof) ASCII Output (JDK 5.0 JVMTI based)
0N/AWARNING! This file format is under development, and is subject to
0N/Achange without notice.
0N/AThis file contains the following types of records:
0N/ATHREAD END mark the lifetime of Java threads
0N/ATRACE represents a Java stack trace. Each trace consists
0N/A of a series of stack frames. Other records refer to
0N/A TRACEs to identify (1) where object allocations have
0N/A taken place, (2) the frames in which GC roots were
0N/A found, and (3) frequently executed methods.
0N/AHEAP DUMP is a complete snapshot of all live objects in the Java
0N/A heap. Following distinctions are made:
0N/A ROOT root set as determined by GC
0N/ASITES is a sorted list of allocation sites. This identifies
0N/A the most heavily allocated object types, and the TRACE
0N/A at which those allocations occurred.
0N/ACPU SAMPLES is a statistical profile of program execution. The VM
0N/A periodically samples all running threads, and assigns
0N/A a quantum to active TRACEs in those threads. Entries
0N/A in this record are TRACEs ranked by the percentage of
0N/A total quanta they consumed; top-ranked TRACEs are
0N/A typically hot spots in the program.
0N/ACPU TIME is a profile of program execution obtained by measuring
the time spent in individual methods (excluding the time
spent in callees), as well as by counting the number of
times each method is called. Entries in this record are
TRACEs ranked by the percentage of total CPU time. The
"count" field indicates the number of times each TRACE
MONITOR TIME is a profile of monitor contention obtained by measuring
the time spent by a thread waiting to enter a monitor.
Entries in this record are TRACEs ranked by the percentage
of total monitor contention time and a brief description
of the monitor. The "count" field indicates the number of
times the monitor was contended at that TRACE.
MONITOR DUMP is a complete snapshot of all the monitors and threads in
HEAP DUMP, SITES, CPU SAMPLES|TIME and MONITOR DUMP|TIME records are generated
at program exit. They can also be obtained during program execution by typing
Ctrl-\ (on Solaris) or by typing Ctrl-Break (on Win32).