Here's some more data: dynamic count of JNI functions executed in 1 iteration of jack size 100 on classpath 0.08 and classpath 0.09 with Jikes RVM. Note the massive number of calls from FileChannelImpl.get_native_fd 2/3 of which are unnecessary. Unless I hear that someone else has already fixed it, I'll put a patch together in the next couple of days.
--dave
[EMAIL PROTECTED] SPECjvm98]$ cat jack.trace.0.08 | grep JNI | sort | uniq -c | sort -nr
10017 JNI called: GetByteArrayElements
10017 JNI called: ReleaseByteArrayElements
408 JNI called: ReleaseStringUTFChars
408 JNI called: GetStringUTFChars
6 JNI CallXXXMethod: (mid 7653) java.lang.Double.isNaN
6 JNI called: NewStringUTF
6 JNI called: CallStaticBooleanMethod
5 JNI called: GetStaticFieldID
3 JNI called: SetLongField
3 JNI called: GetStaticObjectField
3 JNI called: ExceptionOccurred
2 JNI called: GetStaticDoubleField
1 JNI called: GetStaticMethodID
1 JNI called: GetFieldID
[EMAIL PROTECTED] SPECjvm98]$ cat jack.trace.0.09 | grep JNI | sort | uniq -c | sort -nr
301590 JNI called: GetIntField
301590 JNI called: GetFieldID
301590 JNI called: FindClass
10388 JNI called: GetByteArrayElements
10388 JNI called: ReleaseByteArrayElements
408 JNI called: ReleaseStringUTFChars
408 JNI called: GetStringUTFChars
6 JNI CallXXXMethod: (mid 5333) java.lang.Double.isNaN
6 JNI called: NewStringUTF
6 JNI called: CallStaticBooleanMethod
5 JNI called: GetStaticFieldID
3 JNI called: SetStaticObjectField
3 JNI called: NewObject
3 JNI called: ExceptionOccurred
2 JNI called: GetStaticDoubleField
1 JNI called: GetStaticMethodID
1 JNI called: GetMethodID
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