Mercurial > hg > graal-compiler
view src/share/vm/interpreter/invocationCounter.cpp @ 1091:6aa7255741f3
6906727: UseCompressedOops: some card-marking fixes related to object arrays
Summary: Introduced a new write_ref_array(HeapWords* start, size_t count) method that does the requisite MemRegion range calculation so (some of the) clients of the erstwhile write_ref_array(MemRegion mr) do not need to worry. This removed all external uses of array_size(), which was also simplified and made private. Asserts were added to catch other possible issues. Further, less essential, fixes stemming from this investigation are deferred to CR 6904516 (to follow shortly in hs17).
Reviewed-by: kvn, coleenp, jmasa
author | ysr |
---|---|
date | Thu, 03 Dec 2009 15:01:57 -0800 |
parents | bd02caa94611 |
children | c18cbe5936b8 |
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/* * Copyright 1997-2009 Sun Microsystems, Inc. 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 * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ # include "incls/_precompiled.incl" # include "incls/_invocationCounter.cpp.incl" // Implementation of InvocationCounter void InvocationCounter::init() { _counter = 0; // reset all the bits, including the sticky carry reset(); } void InvocationCounter::reset() { // Only reset the state and don't make the method look like it's never // been executed set_state(wait_for_compile); } void InvocationCounter::set_carry() { _counter |= carry_mask; // The carry bit now indicates that this counter had achieved a very // large value. Now reduce the value, so that the method can be // executed many more times before re-entering the VM. int old_count = count(); int new_count = MIN2(old_count, (int) (CompileThreshold / 2)); // prevent from going to zero, to distinguish from never-executed methods if (new_count == 0) new_count = 1; if (old_count != new_count) set(state(), new_count); } void InvocationCounter::set_state(State state) { assert(0 <= state && state < number_of_states, "illegal state"); int init = _init[state]; // prevent from going to zero, to distinguish from never-executed methods if (init == 0 && count() > 0) init = 1; int carry = (_counter & carry_mask); // the carry bit is sticky _counter = (init << number_of_noncount_bits) | carry | state; } void InvocationCounter::print() { tty->print_cr("invocation count: up = %d, limit = %d, carry = %s, state = %s", count(), limit(), carry() ? "true" : "false", state_as_string(state())); } void InvocationCounter::print_short() { tty->print(" [%d%s;%s]", count(), carry()?"+carry":"", state_as_short_string(state())); } // Initialization int InvocationCounter::_init [InvocationCounter::number_of_states]; InvocationCounter::Action InvocationCounter::_action[InvocationCounter::number_of_states]; int InvocationCounter::InterpreterInvocationLimit; int InvocationCounter::InterpreterBackwardBranchLimit; int InvocationCounter::InterpreterProfileLimit; // Tier1 limits int InvocationCounter::Tier1InvocationLimit; int InvocationCounter::Tier1BackEdgeLimit; const char* InvocationCounter::state_as_string(State state) { switch (state) { case wait_for_nothing : return "wait_for_nothing"; case wait_for_compile : return "wait_for_compile"; } ShouldNotReachHere(); return NULL; } const char* InvocationCounter::state_as_short_string(State state) { switch (state) { case wait_for_nothing : return "not comp."; case wait_for_compile : return "compileable"; } ShouldNotReachHere(); return NULL; } static address do_nothing(methodHandle method, TRAPS) { // dummy action for inactive invocation counters method->invocation_counter()->set_carry(); method->invocation_counter()->set_state(InvocationCounter::wait_for_nothing); return NULL; } static address do_decay(methodHandle method, TRAPS) { // decay invocation counters so compilation gets delayed method->invocation_counter()->decay(); return NULL; } void InvocationCounter::def(State state, int init, Action action) { assert(0 <= state && state < number_of_states, "illegal state"); assert(0 <= init && init < count_limit, "initial value out of range"); _init [state] = init; _action[state] = action; } address dummy_invocation_counter_overflow(methodHandle m, TRAPS) { ShouldNotReachHere(); return NULL; } void InvocationCounter::reinitialize(bool delay_overflow) { // define states guarantee((int)number_of_states <= (int)state_limit, "adjust number_of_state_bits"); def(wait_for_nothing, 0, do_nothing); if (delay_overflow) { def(wait_for_compile, 0, do_decay); } else { def(wait_for_compile, 0, dummy_invocation_counter_overflow); } InterpreterInvocationLimit = CompileThreshold << number_of_noncount_bits; InterpreterProfileLimit = ((CompileThreshold * InterpreterProfilePercentage) / 100)<< number_of_noncount_bits; Tier1InvocationLimit = Tier2CompileThreshold << number_of_noncount_bits; Tier1BackEdgeLimit = Tier2BackEdgeThreshold << number_of_noncount_bits; // When methodData is collected, the backward branch limit is compared against a // methodData counter, rather than an InvocationCounter. In the former case, we // don't need the shift by number_of_noncount_bits, but we do need to adjust // the factor by which we scale the threshold. if (ProfileInterpreter) { InterpreterBackwardBranchLimit = (CompileThreshold * (OnStackReplacePercentage - InterpreterProfilePercentage)) / 100; } else { InterpreterBackwardBranchLimit = ((CompileThreshold * OnStackReplacePercentage) / 100) << number_of_noncount_bits; } assert(0 <= InterpreterBackwardBranchLimit, "OSR threshold should be non-negative"); assert(0 <= InterpreterProfileLimit && InterpreterProfileLimit <= InterpreterInvocationLimit, "profile threshold should be less than the compilation threshold " "and non-negative"); } void invocationCounter_init() { InvocationCounter::reinitialize(DelayCompilationDuringStartup); }