archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 23:04:50 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8150629: Initializing all ParScanThreadStates causes significant unaccounted "Other" times

Browse source 
Lazily allocate ParScanThreadStates within the worker threads instead of doing this work upfront serially.

Reviewed-by: mgerdin, jmasa
This commit is contained in:
Thomas Schatzl 2016-02-26 13:02:30 +01:00
parent 6fe8d6e7de
commit d090b74744
2 changed files with 12 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

9
hotspot/src/share/vm/gc/g1/g1ParScanThreadState.cpp
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, 2016, 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
@ -327,6 +327,9 @@ oop G1ParScanThreadState::copy_to_survivor_space(InCSetState const state,
G1ParScanThreadState* G1ParScanThreadStateSet::state_for_worker(uint worker_id) {
assert(worker_id < _n_workers, "out of bounds access");
if (_states[worker_id] == NULL) {
_states[worker_id] = new_par_scan_state(worker_id, _young_cset_length);
}
return _states[worker_id];
}
@ -352,6 +355,10 @@ void G1ParScanThreadStateSet::flush() {
for (uint worker_index = 0; worker_index < _n_workers; ++worker_index) {
G1ParScanThreadState* pss = _states[worker_index];
if (pss == NULL) {
continue;
}
_total_cards_scanned += _cards_scanned[worker_index];
pss->flush(_surviving_young_words_total);