1484
1485 /**
1486 * Waits for a JVMCI compiler to complete a given task. This thread
1487 * waits until either the task completes or it sees no JVMCI compilation
1488 * progress for N consecutive milliseconds where N is
1489 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1490 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1491 *
1492 * @return true if this thread needs to free/recycle the task
1493 */
1494 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1495 MutexLocker waiter(task->lock(), thread);
1496 int progress_wait_attempts = 0;
1497 int methods_compiled = jvmci->methods_compiled();
1498 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1499 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1500 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1501
1502 bool progress;
1503 if (jvmci_compiler_thread != NULL) {
1504 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1505 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1506 } else {
1507 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1508 // that all JVMCI compiler threads are blocked on. We use the counter for
1509 // successful JVMCI compilations to determine whether JVMCI compilation
1510 // is still making progress through the JVMCI compiler queue.
1511 progress = jvmci->methods_compiled() != methods_compiled;
1512 }
1513
1514 if (!progress) {
1515 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1516 if (PrintCompilation) {
1517 task->print(tty, "wait for blocking compilation timed out");
1518 }
1519 break;
1520 }
1521 } else {
1522 progress_wait_attempts = 0;
1523 if (jvmci_compiler_thread == NULL) {
1524 methods_compiled = jvmci->methods_compiled();
1525 }
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1484
1485 /**
1486 * Waits for a JVMCI compiler to complete a given task. This thread
1487 * waits until either the task completes or it sees no JVMCI compilation
1488 * progress for N consecutive milliseconds where N is
1489 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1490 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1491 *
1492 * @return true if this thread needs to free/recycle the task
1493 */
1494 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1495 MutexLocker waiter(task->lock(), thread);
1496 int progress_wait_attempts = 0;
1497 int methods_compiled = jvmci->methods_compiled();
1498 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1499 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1500 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1501
1502 bool progress;
1503 if (jvmci_compiler_thread != NULL) {
1504 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress.
1505 progress = jvmci_compiler_thread->thread_state() != _thread_blocked &&
1506 !jvmci_compiler_thread->is_external_suspend();
1507 } else {
1508 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1509 // that all JVMCI compiler threads are blocked on. We use the counter for
1510 // successful JVMCI compilations to determine whether JVMCI compilation
1511 // is still making progress through the JVMCI compiler queue.
1512 progress = jvmci->methods_compiled() != methods_compiled;
1513 }
1514
1515 if (!progress) {
1516 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1517 if (PrintCompilation) {
1518 task->print(tty, "wait for blocking compilation timed out");
1519 }
1520 break;
1521 }
1522 } else {
1523 progress_wait_attempts = 0;
1524 if (jvmci_compiler_thread == NULL) {
1525 methods_compiled = jvmci->methods_compiled();
1526 }
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