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8059758: Footprint regressions with JDK-8038423 Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything. Reviewed-by: jwilhelm, brutisso
author tschatzl
date Fri, 10 Oct 2014 15:51:58 +0200
parents 75982791ddb6
children a3ba776d6ab6
line wrap: on
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/*
 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2009, 2012 Red Hat, Inc.
 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef SHARE_VM_UTILITIES_DTRACE_HPP
#define SHARE_VM_UTILITIES_DTRACE_HPP

#if defined(DTRACE_ENABLED)

#include <sys/sdt.h>

#define DTRACE_ONLY(x) x
#define NOT_DTRACE(x)

#if defined(SOLARIS)
// Work around dtrace tail call bug 6672627 until it is fixed in solaris 10.
#define HS_DTRACE_WORKAROUND_TAIL_CALL_BUG() \
  do { volatile size_t dtrace_workaround_tail_call_bug = 1; } while (0)

#define USDT1 1
#elif defined(LINUX)
#define HS_DTRACE_WORKAROUND_TAIL_CALL_BUG()
#define USDT1 1
#elif defined(__APPLE__)
#define HS_DTRACE_WORKAROUND_TAIL_CALL_BUG()
#define USDT2 1
#include <sys/types.h>
#include "dtracefiles/hotspot.h"
#include "dtracefiles/hotspot_jni.h"
#include "dtracefiles/hs_private.h"
#else
#error "dtrace enabled for unknown os"
#endif /* defined(SOLARIS) */

#else /* defined(DTRACE_ENABLED) */

#define DTRACE_ONLY(x)
#define NOT_DTRACE(x) x

#define HS_DTRACE_WORKAROUND_TAIL_CALL_BUG()

#ifndef USDT2

#define DTRACE_PROBE(a,b) {;}
#define DTRACE_PROBE1(a,b,c) {;}
#define DTRACE_PROBE2(a,b,c,d) {;}
#define DTRACE_PROBE3(a,b,c,d,e) {;}
#define DTRACE_PROBE4(a,b,c,d,e,f) {;}
#define DTRACE_PROBE5(a,b,c,d,e,f,g) {;}
#define DTRACE_PROBE6(a,b,c,d,e,f,g,h) {;}
#define DTRACE_PROBE7(a,b,c,d,e,f,g,h,i) {;}
#define DTRACE_PROBE8(a,b,c,d,e,f,g,h,i,j) {;}
#define DTRACE_PROBE9(a,b,c,d,e,f,g,h,i,j,k) {;}
#define DTRACE_PROBE10(a,b,c,d,e,f,g,h,i,j,k,l) {;}

#else /* USDT2 */

#include "dtrace_usdt2_disabled.hpp"
#endif /* USDT2 */

#endif /* defined(DTRACE_ENABLED) */

#ifndef USDT2

#define HS_DTRACE_PROBE_FN(provider,name)\
  __dtrace_##provider##___##name

#ifdef SOLARIS
// Solaris dtrace needs actual extern function decls.
#define HS_DTRACE_PROBE_DECL_N(provider,name,args) \
  DTRACE_ONLY(extern "C" void HS_DTRACE_PROBE_FN(provider,name) args)
#define HS_DTRACE_PROBE_CDECL_N(provider,name,args) \
  DTRACE_ONLY(extern void HS_DTRACE_PROBE_FN(provider,name) args)
#else
// Systemtap dtrace compatible probes on GNU/Linux don't.
// If dtrace is disabled this macro becomes NULL
#define HS_DTRACE_PROBE_DECL_N(provider,name,args)
#define HS_DTRACE_PROBE_CDECL_N(provider,name,args)
#endif

/* Dtrace probe declarations */
#define HS_DTRACE_PROBE_DECL(provider,name) \
  HS_DTRACE_PROBE_DECL0(provider,name)
#define HS_DTRACE_PROBE_DECL0(provider,name)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(void))
#define HS_DTRACE_PROBE_DECL1(provider,name,t0)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(uintptr_t))
#define HS_DTRACE_PROBE_DECL2(provider,name,t0,t1)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(uintptr_t,uintptr_t))
#define HS_DTRACE_PROBE_DECL3(provider,name,t0,t1,t2)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(uintptr_t,uintptr_t,uintptr_t))
#define HS_DTRACE_PROBE_DECL4(provider,name,t0,t1,t2,t3)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(uintptr_t,uintptr_t,uintptr_t,\
    uintptr_t))
#define HS_DTRACE_PROBE_DECL5(provider,name,t0,t1,t2,t3,t4)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(\
    uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t))
#define HS_DTRACE_PROBE_DECL6(provider,name,t0,t1,t2,t3,t4,t5)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(\
    uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t))
#define HS_DTRACE_PROBE_DECL7(provider,name,t0,t1,t2,t3,t4,t5,t6)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(\
    uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t))
#define HS_DTRACE_PROBE_DECL8(provider,name,t0,t1,t2,t3,t4,t5,t6,t7)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(\
    uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,\
    uintptr_t))
#define HS_DTRACE_PROBE_DECL9(provider,name,t0,t1,t2,t3,t4,t5,t6,t7,t8)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(\
    uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,\
    uintptr_t,uintptr_t))
#define HS_DTRACE_PROBE_DECL10(provider,name,t0,t1,t2,t3,t4,t5,t6,t7,t8,t9)\
  HS_DTRACE_PROBE_DECL_N(provider,name,(\
    uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,uintptr_t,\
    uintptr_t,uintptr_t,uintptr_t))

/* Dtrace probe definitions */
#if defined(SOLARIS)
// Solaris dtrace uses actual function calls.
#define HS_DTRACE_PROBE_N(provider,name, args) \
  DTRACE_ONLY(HS_DTRACE_PROBE_FN(provider,name) args)

#define HS_DTRACE_PROBE(provider,name) HS_DTRACE_PROBE0(provider,name)
#define HS_DTRACE_PROBE0(provider,name)\
  HS_DTRACE_PROBE_N(provider,name,())
#define HS_DTRACE_PROBE1(provider,name,a0)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0))
#define HS_DTRACE_PROBE2(provider,name,a0,a1)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0,(uintptr_t)a1))
#define HS_DTRACE_PROBE3(provider,name,a0,a1,a2)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0,(uintptr_t)a1,(uintptr_t)a2))
#define HS_DTRACE_PROBE4(provider,name,a0,a1,a2,a3)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0,(uintptr_t)a1,(uintptr_t)a2,\
    (uintptr_t)a3))
#define HS_DTRACE_PROBE5(provider,name,a0,a1,a2,a3,a4)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0,(uintptr_t)a1,(uintptr_t)a2,\
    (uintptr_t)a3,(uintptr_t)a4))
#define HS_DTRACE_PROBE6(provider,name,a0,a1,a2,a3,a4,a5)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0,(uintptr_t)a1,(uintptr_t)a2,\
    (uintptr_t)a3,(uintptr_t)a4,(uintptr_t)a5))
#define HS_DTRACE_PROBE7(provider,name,a0,a1,a2,a3,a4,a5,a6)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0,(uintptr_t)a1,(uintptr_t)a2,\
    (uintptr_t)a3,(uintptr_t)a4,(uintptr_t)a5,(uintptr_t)a6))
#define HS_DTRACE_PROBE8(provider,name,a0,a1,a2,a3,a4,a5,a6,a7)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0,(uintptr_t)a1,(uintptr_t)a2,\
    (uintptr_t)a3,(uintptr_t)a4,(uintptr_t)a5,(uintptr_t)a6,(uintptr_t)a7))
#define HS_DTRACE_PROBE9(provider,name,a0,a1,a2,a3,a4,a5,a6,a7,a8)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0,(uintptr_t)a1,(uintptr_t)a2,\
    (uintptr_t)a3,(uintptr_t)a4,(uintptr_t)a5,(uintptr_t)a6,(uintptr_t)a7,\
    (uintptr_t)a8))
#define HS_DTRACE_PROBE10(provider,name,a0,a1,a2,a3,a4,a5,a6,a7,a8,a9)\
  HS_DTRACE_PROBE_N(provider,name,((uintptr_t)a0,(uintptr_t)a1,(uintptr_t)a2,\
    (uintptr_t)a3,(uintptr_t)a4,(uintptr_t)a5,(uintptr_t)a6,(uintptr_t)a7,\
    (uintptr_t)a8,(uintptr_t)a9))
#else
// Systemtap dtrace compatible probes on GNU/Linux use direct macros.
// If dtrace is disabled this macro becomes NULL
#define HS_DTRACE_PROBE(provider,name) HS_DTRACE_PROBE0(provider,name)
#define HS_DTRACE_PROBE0(provider,name)\
  DTRACE_PROBE(provider,name)
#define HS_DTRACE_PROBE1(provider,name,a0)\
  DTRACE_PROBE1(provider,name,a0)
#define HS_DTRACE_PROBE2(provider,name,a0,a1)\
  DTRACE_PROBE2(provider,name,a0,a1)
#define HS_DTRACE_PROBE3(provider,name,a0,a1,a2)\
  DTRACE_PROBE3(provider,name,a0,a1,a2)
#define HS_DTRACE_PROBE4(provider,name,a0,a1,a2,a3)\
  DTRACE_PROBE4(provider,name,a0,a1,a2,a3)
#define HS_DTRACE_PROBE5(provider,name,a0,a1,a2,a3,a4)\
  DTRACE_PROBE5(provider,name,a0,a1,a2,a3,a4)
#define HS_DTRACE_PROBE6(provider,name,a0,a1,a2,a3,a4,a5)\
  DTRACE_PROBE6(provider,name,a0,a1,a2,a3,a4,a5)
#define HS_DTRACE_PROBE7(provider,name,a0,a1,a2,a3,a4,a5,a6)\
  DTRACE_PROBE7(provider,name,a0,a1,a2,a3,a4,a5,a6)
#define HS_DTRACE_PROBE8(provider,name,a0,a1,a2,a3,a4,a5,a6,a7)\
  DTRACE_PROBE8(provider,name,a0,a1,a2,a3,a4,a5,a6,a7)
#define HS_DTRACE_PROBE9(provider,name,a0,a1,a2,a3,a4,a5,a6,a7,a8)\
  DTRACE_PROBE9(provider,name,a0,a1,a2,a3,a4,a5,a6,a7,a8)
#define HS_DTRACE_PROBE10(provider,name,a0,a1,a2,a3,a4,a5,a6,a7,a8,a9)\
  DTRACE_PROBE10(provider,name,a0,a1,a2,a3,a4,a5,a6,a7,a8,a9)
#endif

#endif /* !USDT2 */

#endif // SHARE_VM_UTILITIES_DTRACE_HPP