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8205676: ZGC: Remove TLAB allocations in relocation path

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Reviewed-by: stefank, eosterlund
This commit is contained in:
Per Lidén 2018-06-27 19:45:05 +02:00
parent bd7d1af092
commit 3e296cc180
1 changed files with 0 additions and 15 deletions
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15
src/hotspot/share/gc/z/zObjectAllocator.cpp
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@ -133,14 +133,6 @@ uintptr_t ZObjectAllocator::alloc_medium_object(size_t size, ZAllocationFlags fl
uintptr_t ZObjectAllocator::alloc_small_object_from_nonworker(size_t size, ZAllocationFlags flags) {
assert(ZThread::is_java() || ZThread::is_vm(), "Should be a Java or VM thread");
if (flags.relocation() && flags.java_thread() && UseTLAB) {
// For relocations from Java threads, try TLAB allocation first
const uintptr_t addr = (uintptr_t)Thread::current()->tlab().allocate(ZUtils::bytes_to_words(size));
if (addr != 0) {
return addr;
}
}
// Non-worker small page allocation can never use the reserve
flags.set_no_reserve();
@ -238,13 +230,6 @@ bool ZObjectAllocator::undo_alloc_medium_object(ZPage* page, uintptr_t addr, siz
bool ZObjectAllocator::undo_alloc_small_object_from_nonworker(ZPage* page, uintptr_t addr, size_t size) {
assert(page->type() == ZPageTypeSmall, "Invalid page type");
if (ZThread::is_java()) {
// Try undo allocation in TLAB
if (Thread::current()->tlab().undo_allocate((HeapWord*)addr, ZUtils::bytes_to_words(size))) {
return true;
}
}
// Try atomic undo on shared page
return page->undo_alloc_object_atomic(addr, size);
}