void AdvancedThresholdPolicy::initialize() {
// Turn on ergonomic compiler count selection
if (FLAG_IS_DEFAULT(CICompilerCountPerCPU) && FLAG_IS_DEFAULT(CICompilerCount)) {
FLAG_SET_DEFAULT(CICompilerCountPerCPU, true);
}
int count = CICompilerCount;
if (CICompilerCountPerCPU) {
// Simple log n seems to grow too slowly for tiered, try something faster: log n * log log n
int log_cpu = log2_intptr(os::active_processor_count());
int loglog_cpu = log2_intptr(MAX2(log_cpu, 1));
count = MAX2(log_cpu * loglog_cpu, 1) * 3 / 2;
}
set_c1_count(MAX2(count / 3, 1));
set_c2_count(MAX2(count - c1_count(), 1));
FLAG_SET_ERGO(intx, CICompilerCount, c1_count() + c2_count());
// Some inlining tuning
#ifdef X86
if (FLAG_IS_DEFAULT(InlineSmallCode)) {
FLAG_SET_DEFAULT(InlineSmallCode, 2000);
}
#endif
#if defined SPARC || defined AARCH64
if (FLAG_IS_DEFAULT(InlineSmallCode)) {
FLAG_SET_DEFAULT(InlineSmallCode, 2500);
}
#endif
set_increase_threshold_at_ratio();
set_start_time(os::javaTimeMillis());
}
void SimpleThresholdPolicy::initialize() {
if (FLAG_IS_DEFAULT(CICompilerCount)) {
FLAG_SET_DEFAULT(CICompilerCount, 3);
}
int count = CICompilerCount;
if (CICompilerCountPerCPU) {
count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2;
}
set_c1_count(MAX2(count / 3, 1));
set_c2_count(MAX2(count - c1_count(), 1));
FLAG_SET_ERGO(intx, CICompilerCount, c1_count() + c2_count());
}
void SimpleThresholdPolicy::initialize() {
if (FLAG_IS_DEFAULT(CICompilerCount)) {
FLAG_SET_DEFAULT(CICompilerCount, 3);
}
int count = CICompilerCount;
#ifdef _LP64
// On 64-bit systems, scale the number of compiler threads with
// the number of cores available on the system. Scaling is not
// performed on 32-bit systems because it can lead to exhaustion
// of the virtual memory address space available to the JVM.
if (CICompilerCountPerCPU) {
count = MAX2(log2_intptr(os::active_processor_count()) * 3 / 2, 2);
FLAG_SET_ERGO(intx, CICompilerCount, count);
}
#endif
if (TieredStopAtLevel < CompLevel_full_optimization) {
// No C2 compiler thread required
set_c1_count(count);
} else {
set_c1_count(MAX2(count / 3, 1));
set_c2_count(MAX2(count - c1_count(), 1));
}
assert(count == c1_count() + c2_count(), "inconsistent compiler thread count");
}
