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src/jdk.jcmd/share/classes/sun/tools/jmap/JMap.java
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rev 60195 : webrev06
@@ -167,32 +167,45 @@
private static void histo(String pid, String options)
throws AttachNotSupportedException, IOException,
UnsupportedEncodingException {
String liveopt = "-all";
String filename = null;
+ String parallel = null;
String subopts[] = options.split(",");
+ boolean set_all = false;
+ boolean set_live = false;
for (int i = 0; i < subopts.length; i++) {
String subopt = subopts[i];
if (subopt.equals("") || subopt.equals("all")) {
- // pass
+ set_all = true;
+ liveopt = "-all";
} else if (subopt.equals("live")) {
+ // Add '-' for compatibility.
+ set_live = true;
liveopt = "-live";
} else if (subopt.startsWith("file=")) {
filename = parseFileName(subopt);
if (filename == null) {
usage(1); // invalid options or no filename
}
+ } else if (subopt.startsWith("parallel=")) {
+ parallel = subopt.substring("parallel=".length());
+ if (parallel == null) {
+ usage(1);
+ }
} else {
usage(1);
}
}
+ if (set_live && set_all) {
+ usage(1);
+ }
System.out.flush();
-
// inspectHeap is not the same as jcmd GC.class_histogram
- executeCommandForPid(pid, "inspectheap", liveopt, filename);
+ executeCommandForPid(pid, "inspectheap", liveopt, filename, parallel);
}
private static void dump(String pid, String options)
throws AttachNotSupportedException, IOException,
UnsupportedEncodingException {
@@ -285,10 +298,14 @@
System.err.println("");
System.err.println(" histo-options:");
System.err.println(" live count only live objects");
System.err.println(" all count all objects in the heap (default if one of \"live\" or \"all\" is not specified)");
System.err.println(" file=<file> dump data to <file>");
+ System.err.println(" parallel=<number> parallel threads number for heap iteration:");
+ System.err.println(" parallel=0 default behavior, use predefined number of threads");
+ System.err.println(" parallel=1 disable parallel heap iteration");
+ System.err.println(" parallel=<N> use N threads for parallel heap iteration");
System.err.println("");
System.err.println(" Example: jmap -histo:live,file=/tmp/histo.data <pid>");
System.exit(exit);
}
}
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