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src/os/windows/vm/os_windows.hpp@ee21eaa8ffe1 (annotated)

src/os/windows/vm/os_windows.hpp

Thu, 02 Oct 2008 12:01:08 -0700

author

jmasa

date

Thu, 02 Oct 2008 12:01:08 -0700

changeset 824

ee21eaa8ffe1

parent 435

a61af66fc99e

child 905

ad8c8ca4ab0f

permissions

-rw-r--r--

6660681: Incrementally reserve pages on win server 2003 for better large page affinity
Summary: For windows server 2003 added option to reserve large pages individually.
Reviewed-by: alanb, jcoomes, tonyp, apetrusenko

duke@435	1	/*
duke@435	2	* Copyright 1997-2006 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	// Win32_OS defines the interface to windows operating systems
duke@435	26
duke@435	27	class win32 {
duke@435	28
duke@435	29	protected:
duke@435	30	static int _vm_page_size;
duke@435	31	static int _vm_allocation_granularity;
duke@435	32	static int _processor_type;
duke@435	33	static int _processor_level;
duke@435	34	static julong _physical_memory;
duke@435	35	static size_t _default_stack_size;
duke@435	36	static bool _is_nt;
jmasa@824	37	static bool _is_windows_2003;
duke@435	38
duke@435	39	public:
duke@435	40	// Windows-specific interface:
duke@435	41	static void initialize_system_info();
duke@435	42	static void setmode_streams();
duke@435	43
duke@435	44	// Processor info as provided by NT
duke@435	45	static int processor_type() { return _processor_type; }
duke@435	46	// Processor level may not be accurate on non-NT systems
duke@435	47	static int processor_level() {
duke@435	48	assert(is_nt(), "use vm_version instead");
duke@435	49	return _processor_level;
duke@435	50	}
duke@435	51	static julong available_memory();
duke@435	52	static julong physical_memory() { return _physical_memory; }
duke@435	53
duke@435	54	public:
duke@435	55	// Generic interface:
duke@435	56
duke@435	57	// Trace number of created threads
duke@435	58	static intx _os_thread_limit;
duke@435	59	static volatile intx _os_thread_count;
duke@435	60
duke@435	61	// Tells whether the platform is NT or Windown95
duke@435	62	static bool is_nt() { return _is_nt; }
duke@435	63
jmasa@824	64	// Tells whether the platform is Windows 2003
jmasa@824	65	static bool is_windows_2003() { return _is_windows_2003; }
jmasa@824	66
duke@435	67	// Returns the byte size of a virtual memory page
duke@435	68	static int vm_page_size() { return _vm_page_size; }
duke@435	69
duke@435	70	// Returns the size in bytes of memory blocks which can be allocated.
duke@435	71	static int vm_allocation_granularity() { return _vm_allocation_granularity; }
duke@435	72
duke@435	73	// Read the headers for the executable that started the current process into
duke@435	74	// the structure passed in (see winnt.h).
duke@435	75	static void read_executable_headers(PIMAGE_NT_HEADERS);
duke@435	76
duke@435	77	// Default stack size for the current process.
duke@435	78	static size_t default_stack_size() { return _default_stack_size; }
duke@435	79
duke@435	80	#ifndef _WIN64
duke@435	81	// A wrapper to install a structured exception handler for fast JNI accesors.
duke@435	82	static address fast_jni_accessor_wrapper(BasicType);
duke@435	83	#endif
duke@435	84
duke@435	85	// filter function to ignore faults on serializations page
duke@435	86	static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e);
duke@435	87	};
duke@435	88
duke@435	89	class PlatformEvent : public CHeapObj {
duke@435	90	private:
duke@435	91	double CachePad [4] ; // increase odds that _Event is sole occupant of cache line
duke@435	92	volatile int _Event ;
duke@435	93	HANDLE _ParkHandle ;
duke@435	94
duke@435	95	public: // TODO-FIXME: make dtor private
duke@435	96	~PlatformEvent() { guarantee (0, "invariant") ; }
duke@435	97
duke@435	98	public:
duke@435	99	PlatformEvent() {
duke@435	100	_Event = 0 ;
duke@435	101	_ParkHandle = CreateEvent (NULL, false, false, NULL) ;
duke@435	102	guarantee (_ParkHandle != NULL, "invariant") ;
duke@435	103	}
duke@435	104
duke@435	105	// Exercise caution using reset() and fired() - they may require MEMBARs
duke@435	106	void reset() { _Event = 0 ; }
duke@435	107	int fired() { return _Event; }
duke@435	108	void park () ;
duke@435	109	void unpark () ;
duke@435	110	int park (jlong millis) ;
duke@435	111	} ;
duke@435	112
duke@435	113
duke@435	114
duke@435	115	class PlatformParker : public CHeapObj {
duke@435	116	protected:
duke@435	117	HANDLE _ParkEvent ;
duke@435	118
duke@435	119	public:
duke@435	120	~PlatformParker () { guarantee (0, "invariant") ; }
duke@435	121	PlatformParker () {
duke@435	122	_ParkEvent = CreateEvent (NULL, true, false, NULL) ;
duke@435	123	guarantee (_ParkEvent != NULL, "invariant") ;
duke@435	124	}
duke@435	125
duke@435	126	} ;