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8261447: MethodInvocationCounters frequently run into overflow

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Reviewed-by: thartmann, mdoerr, kvn, iveresov
This commit is contained in:
Lutz Schmidt 2021-03-03 20:04:31 +00:00
parent 75aa15467e
commit 268d9b7982
11 changed files with 160 additions and 113 deletions
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19
src/hotspot/share/oops/method.cpp
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@ -493,6 +493,7 @@ bool Method::was_executed_more_than(int n) {
}
void Method::print_invocation_count() {
//---< compose+print method return type, klass, name, and signature >---
if (is_static()) tty->print("static ");
if (is_final()) tty->print("final ");
if (is_synchronized()) tty->print("synchronized ");
@ -507,12 +508,22 @@ void Method::print_invocation_count() {
}
tty->cr();
tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count());
tty->print_cr (" invocation_counter: %8d ", invocation_count());
tty->print_cr (" backedge_counter: %8d ", backedge_count());
// Counting based on signed int counters tends to overflow with
// longer-running workloads on fast machines. The counters under
// consideration here, however, are limited in range by counting
// logic. See InvocationCounter:count_limit for example.
// No "overflow precautions" need to be implemented here.
tty->print_cr (" interpreter_invocation_count: " INT32_FORMAT_W(11), interpreter_invocation_count());
tty->print_cr (" invocation_counter: " INT32_FORMAT_W(11), invocation_count());
tty->print_cr (" backedge_counter: " INT32_FORMAT_W(11), backedge_count());
if (method_data() != NULL) {
tty->print_cr (" decompile_count: " UINT32_FORMAT_W(11), method_data()->decompile_count());
}
#ifndef PRODUCT
if (CountCompiledCalls) {
tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count());
tty->print_cr (" compiled_invocation_count: " INT64_FORMAT_W(11), compiled_invocation_count());
}
#endif
}