117 lines
3.1 KiB
D
Executable File
117 lines
3.1 KiB
D
Executable File
#!/usr/sbin/dtrace -CZs
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/*
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* j_cpudist.d - measure Java on-CPU times for different types of operation.
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* Written for the Java hotspot DTrace provider.
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*
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* $Id: j_cpudist.d 59 2007-10-03 08:21:58Z brendan $
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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 are only visible when using the
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* flag "+ExtendedDTraceProbes". eg, java -XX:+ExtendedDTraceProbes classfile
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*
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* USAGE: j_cpudist.d [top] # hit Ctrl-C to end
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*
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* The "top" optional argument will truncate the output for each report
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* section to that many lines, with a default of 10.
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*
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* FIELDS:
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* 1 Process ID
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* 2 Type of call (method/gc)
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* 3 Name of call
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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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#define TOP 10 /* default output truncation */
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#define B_FALSE 0
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#pragma D option quiet
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#pragma D option defaultargs
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dtrace:::BEGIN
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{
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printf("Tracing... Hit Ctrl-C to end.\n");
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top = $1 != 0 ? $1 : TOP;
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}
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hotspot*:::method-entry
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{
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self->depth[arg0]++;
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self->exclude[arg0, self->depth[arg0]] = 0;
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self->method[arg0, self->depth[arg0]] = vtimestamp;
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}
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hotspot*:::method-return
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/self->method[arg0, self->depth[arg0]]/
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{
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this->oncpu_incl = vtimestamp - self->method[arg0, self->depth[arg0]];
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this->oncpu_excl = this->oncpu_incl -
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self->exclude[arg0, self->depth[arg0]];
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self->method[arg0, self->depth[arg0]] = 0;
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self->exclude[arg0, self->depth[arg0]] = 0;
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this->class = (char *)copyin(arg1, arg2 + 1);
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this->class[arg2] = '\0';
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this->method = (char *)copyin(arg3, arg4 + 1);
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this->method[arg4] = '\0';
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this->name = strjoin(strjoin(stringof(this->class), "."),
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stringof(this->method));
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@types_incl[pid, "method", this->name] =
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quantize(this->oncpu_incl / 1000);
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@types_excl[pid, "method", this->name] =
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quantize(this->oncpu_excl / 1000);
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self->depth[arg0]--;
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self->exclude[arg0, self->depth[arg0]] += this->oncpu_incl;
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}
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hotspot*:::gc-begin
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{
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self->gc = vtimestamp;
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self->full = (boolean_t)arg0;
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}
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hotspot*:::gc-end
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/self->gc/
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{
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this->oncpu = vtimestamp - self->gc;
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@types[pid, "gc", self->full == B_FALSE ? "GC" : "Full GC"] =
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quantize(this->oncpu / 1000);
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self->gc = 0;
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self->full = 0;
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}
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dtrace:::END
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{
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trunc(@types, top);
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printf("\nTop %d on-CPU times (us),\n", top);
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printa(" PID=%d, %s, %s %@d\n", @types);
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trunc(@types_excl, top);
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printf("\nTop %d exclusive method on-CPU times (us),\n", top);
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printa(" PID=%d, %s, %s %@d\n", @types_excl);
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trunc(@types_incl, top);
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printf("\nTop %d inclusive method on-CPU times (us),\n", top);
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printa(" PID=%d, %s, %s %@d\n", @types_incl);
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}
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