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7129514: time warp warnings after 7117303

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Replace calls to os::javaTimeMillis() that are used to update the milliseconds since the last GC to an equivalent that uses a monotonically non-decreasing time source.

Reviewed-by: ysr, jmasa
This commit is contained in:
John Cuthbertson 2012-01-18 09:50:16 -08:00
parent 6a31970946
commit fa9d6d7682
4 changed files with 23 additions and 6 deletions
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9
hotspot/src/share/vm/memory/defNewGeneration.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 2012, 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
@ -655,7 +655,12 @@ void DefNewGeneration::collect(bool full,
from()->set_concurrent_iteration_safe_limit(from()->top());
to()->set_concurrent_iteration_safe_limit(to()->top());
SpecializationStats::print();
update_time_of_last_gc(os::javaTimeMillis());
// We need to use a monotonically non-deccreasing time in ms
// or we will see time-warp warnings and os::javaTimeMillis()
// does not guarantee monotonicity.
jlong now = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
update_time_of_last_gc(now);
}
class RemoveForwardPointerClosure: public ObjectClosure {