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8199406: Performance drop with Java JDK 1.8.0_162-b32

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Improve the nmethod unloading times by optimizing the search for an itable stub in VtableStubs array

Reviewed-by: kvn, coleenp, tschatzl
This commit is contained in:
Poonam Bajaj 2018-03-30 18:46:14 +00:00
parent 6bdeaad21a
commit 25fbd2ff16
7 changed files with 71 additions and 37 deletions
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24
src/hotspot/share/code/codeBlob.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -294,6 +294,28 @@ AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {
return blob;
}
VtableBlob::VtableBlob(const char* name, int size) :
BufferBlob(name, size) {
}
VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
VtableBlob* blob = NULL;
unsigned int size = sizeof(VtableBlob);
// align the size to CodeEntryAlignment
size = align_code_offset(size);
size += align_up(buffer_size, oopSize);
assert(name != NULL, "must provide a name");
{
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size) VtableBlob(name, size);
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
return blob;
}
//----------------------------------------------------------------------------------------------------
// Implementation of MethodHandlesAdapterBlob