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src/cpu/sparc/vm/vm_version_sparc.cpp@ba764ed4b6f2 (annotated)

src/cpu/sparc/vm/vm_version_sparc.cpp

Sun, 13 Apr 2008 17:43:42 -0400

author

coleenp

date

Sun, 13 Apr 2008 17:43:42 -0400

changeset 548

ba764ed4b6f2

parent 445

28372612af5e

child 631

d1605aabd0a1

permissions

-rw-r--r--

6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold

duke@435	1	/*
duke@435	2	* Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	# include "incls/_precompiled.incl"
duke@435	26	# include "incls/_vm_version_sparc.cpp.incl"
duke@435	27
duke@435	28	int VM_Version::_features = VM_Version::unknown_m;
duke@435	29	const char* VM_Version::_features_str = "";
duke@435	30
jmasa@445	31	bool VM_Version::is_niagara1_plus() {
jmasa@445	32	// This is a placeholder until the real test is determined.
jmasa@445	33	return is_niagara1() &&
jmasa@445	34	(os::processor_count() > maximum_niagara1_processor_count());
jmasa@445	35	}
jmasa@445	36
duke@435	37	void VM_Version::initialize() {
duke@435	38	_features = determine_features();
duke@435	39	PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes();
duke@435	40	PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes();
duke@435	41	PrefetchFieldsAhead = prefetch_fields_ahead();
duke@435	42
duke@435	43	// Allocation prefetch settings
duke@435	44	intx cache_line_size = L1_data_cache_line_size();
duke@435	45	if( cache_line_size > AllocatePrefetchStepSize )
duke@435	46	AllocatePrefetchStepSize = cache_line_size;
duke@435	47	if( FLAG_IS_DEFAULT(AllocatePrefetchLines) )
duke@435	48	AllocatePrefetchLines = 3; // Optimistic value
duke@435	49	assert( AllocatePrefetchLines > 0, "invalid value");
duke@435	50	if( AllocatePrefetchLines < 1 ) // set valid value in product VM
duke@435	51	AllocatePrefetchLines = 1; // Conservative value
duke@435	52
duke@435	53	AllocatePrefetchDistance = allocate_prefetch_distance();
duke@435	54	AllocatePrefetchStyle = allocate_prefetch_style();
duke@435	55
duke@435	56	assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value");
duke@435	57
duke@435	58	UseSSE = 0; // Only on x86 and x64
duke@435	59
duke@435	60	_supports_cx8 = has_v9();
duke@435	61
duke@435	62	if (is_niagara1()) {
duke@435	63	// Indirect branch is the same cost as direct
duke@435	64	if (FLAG_IS_DEFAULT(UseInlineCaches)) {
duke@435	65	UseInlineCaches = false;
duke@435	66	}
coleenp@548	67	#ifdef _LP64
coleenp@548	68	// Single issue niagara1 is slower for CompressedOops
coleenp@548	69	// but niagaras after that it's fine.
coleenp@548	70	if (!is_niagara1_plus()) {
coleenp@548	71	if (FLAG_IS_DEFAULT(UseCompressedOops)) {
coleenp@548	72	FLAG_SET_ERGO(bool, UseCompressedOops, false);
coleenp@548	73	}
coleenp@548	74	}
coleenp@548	75	#endif // _LP64
duke@435	76	#ifdef COMPILER2
duke@435	77	// Indirect branch is the same cost as direct
duke@435	78	if (FLAG_IS_DEFAULT(UseJumpTables)) {
duke@435	79	UseJumpTables = true;
duke@435	80	}
duke@435	81	// Single-issue, so entry and loop tops are
duke@435	82	// aligned on a single instruction boundary
duke@435	83	if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) {
duke@435	84	InteriorEntryAlignment = 4;
duke@435	85	}
duke@435	86	if (FLAG_IS_DEFAULT(OptoLoopAlignment)) {
duke@435	87	OptoLoopAlignment = 4;
duke@435	88	}
duke@435	89	#endif
duke@435	90	}
duke@435	91
duke@435	92	char buf[512];
duke@435	93	jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
duke@435	94	(has_v8() ? ", has_v8" : ""),
duke@435	95	(has_v9() ? ", has_v9" : ""),
duke@435	96	(has_vis1() ? ", has_vis1" : ""),
duke@435	97	(has_vis2() ? ", has_vis2" : ""),
duke@435	98	(is_ultra3() ? ", is_ultra3" : ""),
duke@435	99	(is_sun4v() ? ", is_sun4v" : ""),
duke@435	100	(is_niagara1() ? ", is_niagara1" : ""),
duke@435	101	(!has_hardware_int_muldiv() ? ", no-muldiv" : ""),
duke@435	102	(!has_hardware_fsmuld() ? ", no-fsmuld" : ""));
duke@435	103
duke@435	104	// buf is started with ", " or is empty
duke@435	105	_features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf);
duke@435	106
duke@435	107	#ifndef PRODUCT
duke@435	108	if (PrintMiscellaneous && Verbose) {
duke@435	109	tty->print("Allocation: ");
duke@435	110	if (AllocatePrefetchStyle <= 0) {
duke@435	111	tty->print_cr("no prefetching");
duke@435	112	} else {
duke@435	113	if (AllocatePrefetchLines > 1) {
duke@435	114	tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize);
duke@435	115	} else {
duke@435	116	tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance);
duke@435	117	}
duke@435	118	}
duke@435	119	if (PrefetchCopyIntervalInBytes > 0) {
duke@435	120	tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes);
duke@435	121	}
duke@435	122	if (PrefetchScanIntervalInBytes > 0) {
duke@435	123	tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes);
duke@435	124	}
duke@435	125	if (PrefetchFieldsAhead > 0) {
duke@435	126	tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead);
duke@435	127	}
duke@435	128	}
duke@435	129	#endif // PRODUCT
duke@435	130	}
duke@435	131
duke@435	132	void VM_Version::print_features() {
duke@435	133	tty->print_cr("Version:%s", cpu_features());
duke@435	134	}
duke@435	135
duke@435	136	int VM_Version::determine_features() {
duke@435	137	if (UseV8InstrsOnly) {
duke@435	138	NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");)
duke@435	139	return generic_v8_m;
duke@435	140	}
duke@435	141
duke@435	142	int features = platform_features(unknown_m); // platform_features() is os_arch specific
duke@435	143
duke@435	144	if (features == unknown_m) {
duke@435	145	features = generic_v9_m;
duke@435	146	warning("Cannot recognize SPARC version. Default to V9");
duke@435	147	}
duke@435	148
duke@435	149	if (UseNiagaraInstrs) {
duke@435	150	if (is_niagara1(features)) {
duke@435	151	// Happy to accomodate...
duke@435	152	} else {
duke@435	153	NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");)
duke@435	154	features = niagara1_m;
duke@435	155	}
duke@435	156	} else {
duke@435	157	if (is_niagara1(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) {
duke@435	158	NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");)
duke@435	159	features &= ~niagara1_unique_m;
duke@435	160	} else {
duke@435	161	// Happy to accomodate...
duke@435	162	}
duke@435	163	}
duke@435	164
duke@435	165	return features;
duke@435	166	}
duke@435	167
duke@435	168	static int saved_features = 0;
duke@435	169
duke@435	170	void VM_Version::allow_all() {
duke@435	171	saved_features = _features;
duke@435	172	_features = all_features_m;
duke@435	173	}
duke@435	174
duke@435	175	void VM_Version::revert() {
duke@435	176	_features = saved_features;
duke@435	177	}
jmasa@445	178
jmasa@445	179	unsigned int VM_Version::calc_parallel_worker_threads() {
jmasa@445	180	unsigned int result;
jmasa@445	181	if (is_niagara1_plus()) {
jmasa@445	182	result = nof_parallel_worker_threads(5, 16, 8);
jmasa@445	183	} else {
jmasa@445	184	result = nof_parallel_worker_threads(5, 8, 8);
jmasa@445	185	}
jmasa@445	186	return result;
jmasa@445	187	}