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8195100: Use a low latency hashtable for SymbolTable

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Used concurrentHashTable, similar to stringTable

Reviewed-by: coleenp, kbarrett, iklam, pliden
This commit is contained in:
Gerard Ziemski 2018-08-14 18:42:14 -05:00
parent 9cea96184f
commit b75805c1a5
26 changed files with 1094 additions and 798 deletions
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22
src/hotspot/share/classfile/classLoaderData.cpp
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@ -1418,6 +1418,28 @@ bool ClassLoaderDataGraph::do_unloading(bool do_cleaning) {
}
if (seen_dead_loader) {
data = _head;
while (data != NULL) {
// Remove entries in the dictionary of live class loader that have
// initiated loading classes in a dead class loader.
if (data->dictionary() != NULL) {
data->dictionary()->do_unloading();
}
// Walk a ModuleEntry's reads, and a PackageEntry's exports
// lists to determine if there are modules on those lists that are now
// dead and should be removed. A module's life cycle is equivalent
// to its defining class loader's life cycle. Since a module is
// considered dead if its class loader is dead, these walks must
// occur after each class loader's aliveness is determined.
if (data->packages() != NULL) {
data->packages()->purge_all_package_exports();
}
if (data->modules_defined()) {
data->modules()->purge_all_module_reads();
}
data = data->next();
}
SymbolTable::do_check_concurrent_work();
JFR_ONLY(post_class_unload_events();)
}