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src/share/vm/runtime/simpleThresholdPolicy.inline.hpp@d5d065957597 (annotated)

src/share/vm/runtime/simpleThresholdPolicy.inline.hpp

Fri, 03 Sep 2010 17:51:07 -0700

author

iveresov

date

Fri, 03 Sep 2010 17:51:07 -0700

changeset 2138

d5d065957597

child 2314

f95d63e2154a

permissions

-rw-r--r--

6953144: Tiered compilation
Summary: Infrastructure for tiered compilation support (interpreter + c1 + c2) for 32 and 64 bit. Simple tiered policy implementation.
Reviewed-by: kvn, never, phh, twisti

iveresov@2138	1	/*
iveresov@2138	2	* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
iveresov@2138	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
iveresov@2138	4	*
iveresov@2138	5	* This code is free software; you can redistribute it and/or modify it
iveresov@2138	6	* under the terms of the GNU General Public License version 2 only, as
iveresov@2138	7	* published by the Free Software Foundation.
iveresov@2138	8	*
iveresov@2138	9	* This code is distributed in the hope that it will be useful, but WITHOUT
iveresov@2138	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
iveresov@2138	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
iveresov@2138	12	* version 2 for more details (a copy is included in the LICENSE file that
iveresov@2138	13	* accompanied this code).
iveresov@2138	14	*
iveresov@2138	15	* You should have received a copy of the GNU General Public License version
iveresov@2138	16	* 2 along with this work; if not, write to the Free Software Foundation,
iveresov@2138	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
iveresov@2138	18	*
iveresov@2138	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
iveresov@2138	20	* or visit www.oracle.com if you need additional information or have any
iveresov@2138	21	* questions.
iveresov@2138	22	*
iveresov@2138	23	*/
iveresov@2138	24
iveresov@2138	25
iveresov@2138	26	template<CompLevel level>
iveresov@2138	27	bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) {
iveresov@2138	28	switch(level) {
iveresov@2138	29	case CompLevel_none:
iveresov@2138	30	case CompLevel_limited_profile:
iveresov@2138	31	return (i > Tier3InvocationThreshold * scale) ||
iveresov@2138	32	(i > Tier3MinInvocationThreshold * scale && i + b > Tier3CompileThreshold * scale);
iveresov@2138	33	case CompLevel_full_profile:
iveresov@2138	34	return (i > Tier4InvocationThreshold * scale) ||
iveresov@2138	35	(i > Tier4MinInvocationThreshold * scale && i + b > Tier4CompileThreshold * scale);
iveresov@2138	36	}
iveresov@2138	37	return true;
iveresov@2138	38	}
iveresov@2138	39
iveresov@2138	40	template<CompLevel level>
iveresov@2138	41	bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) {
iveresov@2138	42	switch(level) {
iveresov@2138	43	case CompLevel_none:
iveresov@2138	44	case CompLevel_limited_profile:
iveresov@2138	45	return b > Tier3BackEdgeThreshold * scale;
iveresov@2138	46	case CompLevel_full_profile:
iveresov@2138	47	return b > Tier4BackEdgeThreshold * scale;
iveresov@2138	48	}
iveresov@2138	49	return true;
iveresov@2138	50	}
iveresov@2138	51
iveresov@2138	52	// Simple methods are as good being compiled with C1 as C2.
iveresov@2138	53	// Determine if a given method is such a case.
iveresov@2138	54	bool SimpleThresholdPolicy::is_trivial(methodOop method) {
iveresov@2138	55	if (method->is_accessor()) return true;
iveresov@2138	56	if (method->code() != NULL) {
iveresov@2138	57	methodDataOop mdo = method->method_data();
iveresov@2138	58	if (mdo != NULL && mdo->num_loops() == 0 &&
iveresov@2138	59	(method->code_size() < 5 || (mdo->num_blocks() < 4) && (method->code_size() < 15))) {
iveresov@2138	60	return !mdo->would_profile();
iveresov@2138	61	}
iveresov@2138	62	}
iveresov@2138	63	return false;
iveresov@2138	64	}