Incorrect arguments is passed to sun.misc.Perf#createLong
Yasu
yasu at ysfactory.dip.jp
Tue Apr 9 04:50:20 PDT 2013
Hi,
I'm trying to create entry from Java program to hsperfdata through sun.misc.PerfCounter .
However, I cannot watch the updated value in my entry through the jstat with interval option.
I guess this cause is that wrong arguments are passed from PerfCounter#<init> to Perf#createLong .
sun.misc.PerfCounter:
---------
private PerfCounter(String name, int type) {
this.name = name;
ByteBuffer bb = perf.createLong(name, U_None, type, 0L);
bb.order(ByteOrder.nativeOrder());
this.lb = bb.asLongBuffer();
}
---------
sun.misc.Perf:
---------
public native ByteBuffer createLong(String name, int variability,
int units, long value);
---------
"type" in constructor of PerfCounter means "variability".
So "type" should be set to 2nd argument in perf.createLong()
perf.createLong() should be called as following:
---------
ByteBuffer bb = perf.createLong(name, type, U_None, 0L);
---------
I've applied a patch which is attached in this email, it's works fine.
Thanks,
Yasumasa
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