jdk8-mips64-public/hotspot: src/share/vm/runtime/perfData.cpp@72053ed6f8d4 (annotated)

src/share/vm/runtime/perfData.cpp@72053ed6f8d4 (annotated)

src/share/vm/runtime/perfData.cpp

Thu, 24 Nov 2016 11:27:57 +0100

author: tschatzl
date: Thu, 24 Nov 2016 11:27:57 +0100
changeset 9982: 72053ed6f8d4
parent 6680: 78bbf4d43a14
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8057003: Large reference arrays cause extremely long synchronization times
Summary: Slice large object arrays into parts so that the synchronization of marking threads with an STW pause request does not take long.
Reviewed-by: ehelin, pliden
Contributed-by: maoliang.ml@alibaba-inc.com

 /*
  * Copyright (c) 2001, 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/java.hpp"
 #include "runtime/mutex.hpp"
 #include "runtime/mutexLocker.hpp"
 #include "runtime/os.hpp"
 #include "runtime/perfData.hpp"
 #include "utilities/exceptions.hpp"
 #include "utilities/globalDefinitions.hpp"
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 PerfDataList*   PerfDataManager::_all = NULL;
 PerfDataList*   PerfDataManager::_sampled = NULL;
 PerfDataList*   PerfDataManager::_constants = NULL;
 /*
  * The jvmstat global and subsysem jvmstat counter name spaces. The top
  * level name spaces imply the interface stability level of the counter,
  * which generally follows the Java package, class, and property naming
  * conventions. The CounterNS enumeration values should be used to index
  * into this array.
  */
 const char* PerfDataManager::_name_spaces[] = {
   // top level name spaces
   "java",                   // stable and supported name space
   "com.sun",                // unstable but supported name space
   "sun",                    // unstable and unsupported name space
   // subsystem name spaces
   "java.gc",                // Garbage Collection name spaces
   "com.sun.gc",
   "sun.gc",
   "java.ci",                // Compiler name spaces
   "com.sun.ci",
   "sun.ci",
   "java.cls",               // Class Loader name spaces
   "com.sun.cls",
   "sun.cls",
   "java.rt",                // Runtime name spaces
   "com.sun.rt",
   "sun.rt",
   "java.os",                // Operating System name spaces
   "com.sun.os",
   "sun.os",
   "java.threads",           // Threads System name spaces
   "com.sun.threads",
   "sun.threads",
   "java.property",          // Java Property name spaces
   "com.sun.property",
   "sun.property",
   "",
 };
 PerfData::PerfData(CounterNS ns, const char* name, Units u, Variability v)
                   : _name(NULL), _u(u), _v(v), _valuep(NULL),
                     _on_c_heap(false) {
   const char* prefix = PerfDataManager::ns_to_string(ns);
   _name = NEW_C_HEAP_ARRAY(char, strlen(name) + strlen(prefix) + 2, mtInternal);
   assert(_name != NULL && strlen(name) != 0, "invalid name");
   if (ns == NULL_NS) {
      // No prefix is added to counters with the NULL_NS namespace.
      strcpy(_name, name);
      // set the F_Supported flag based on the counter name prefix.
      if (PerfDataManager::is_stable_supported(_name) ||
          PerfDataManager::is_unstable_supported(_name)) {
        _flags = F_Supported;
      }
      else {
        _flags = F_None;
      }
   }
   else {
     sprintf(_name, "%s.%s", prefix, name);
     // set the F_Supported flag based on the given namespace.
     if (PerfDataManager::is_stable_supported(ns) ||
         PerfDataManager::is_unstable_supported(ns)) {
       _flags = F_Supported;
     }
     else {
       _flags = F_None;
     }
   }
 }
 PerfData::~PerfData() {
   if (_name != NULL) {
     FREE_C_HEAP_ARRAY(char, _name, mtInternal);
   }
   if (is_on_c_heap()) {
     FREE_C_HEAP_ARRAY(PerfDataEntry, _pdep, mtInternal);
   }
 }
 void PerfData::create_entry(BasicType dtype, size_t dsize, size_t vlen) {
   size_t dlen = vlen==0 ? 1 : vlen;
   size_t namelen = strlen(name()) + 1;  // include null terminator
   size_t size = sizeof(PerfDataEntry) + namelen;
   size_t pad_length = ((size % dsize) == 0) ? 0 : dsize - (size % dsize);
   size += pad_length;
   size_t data_start = size;
   size += (dsize * dlen);
   // align size to assure allocation in units of 8 bytes
   int align = sizeof(jlong) - 1;
   size = ((size + align) & ~align);
   char* psmp = PerfMemory::alloc(size);
   if (psmp == NULL) {
     // out of PerfMemory memory resources. allocate on the C heap
     // to avoid vm termination.
     psmp = NEW_C_HEAP_ARRAY(char, size, mtInternal);
     _on_c_heap = true;
   }
   // compute the addresses for the name and data
   char* cname = psmp + sizeof(PerfDataEntry);
   // data is in the last dsize*dlen bytes of the entry
   void* valuep = (void*) (psmp + data_start);
   assert(is_on_c_heap() || PerfMemory::contains(cname), "just checking");
   assert(is_on_c_heap() || PerfMemory::contains((char*)valuep), "just checking");
   // copy the name, including null terminator, into PerfData memory
   strcpy(cname, name());
   // set the header values in PerfData memory
   PerfDataEntry* pdep = (PerfDataEntry*)psmp;
   pdep->entry_length = (jint)size;
   pdep->name_offset = (jint) ((uintptr_t) cname - (uintptr_t) psmp);
   pdep->vector_length = (jint)vlen;
   pdep->data_type = (jbyte) type2char(dtype);
   pdep->data_units = units();
   pdep->data_variability = variability();
   pdep->flags = (jbyte)flags();
   pdep->data_offset = (jint) data_start;
   if (PerfTraceDataCreation) {
     tty->print("name = %s, dtype = %d, variability = %d,"
                " units = %d, dsize = %d, vlen = %d,"
                " pad_length = %d, size = %d, on_c_heap = %s,"
                " address = " INTPTR_FORMAT ","
                " data address = " INTPTR_FORMAT "\n",
                cname, dtype, variability(),
                units(), dsize, vlen,
                pad_length, size, is_on_c_heap() ? "TRUE":"FALSE",
                psmp, valuep);
   }
   // record the start of the entry and the location of the data field.
   _pdep = pdep;
   _valuep = valuep;
   // mark the PerfData memory region as having been updated.
   PerfMemory::mark_updated();
 }
 PerfLong::PerfLong(CounterNS ns, const char* namep, Units u, Variability v)
                  : PerfData(ns, namep, u, v) {
   create_entry(T_LONG, sizeof(jlong));
 }
 int PerfLong::format(char* buffer, int length) {
   return jio_snprintf(buffer, length, JLONG_FORMAT, *(jlong*)_valuep);
 }
 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u,
                                  Variability v, jlong* sampled)
                                 : PerfLong(ns, namep, u, v),
                                   _sampled(sampled), _sample_helper(NULL) {
   sample();
 }
 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u,
                                  Variability v, PerfLongSampleHelper* helper)
                                 : PerfLong(ns, namep, u, v),
                                   _sampled(NULL), _sample_helper(helper) {
   sample();
 }
 void PerfLongVariant::sample() {
   // JJJ - This should not happen.  Maybe the first sample is taken
   // while the _sample_helper is being null'ed out.
   // assert(_sample_helper != NULL || _sampled != NULL, "unexpected state");
   if (_sample_helper == NULL) return;
   if (_sample_helper != NULL) {
     *(jlong*)_valuep = _sample_helper->take_sample();
   }
   else if (_sampled != NULL) {
     *(jlong*)_valuep = *_sampled;
   }
 }
 PerfByteArray::PerfByteArray(CounterNS ns, const char* namep, Units u,
                              Variability v, jint length)
                             : PerfData(ns, namep, u, v), _length(length) {
   create_entry(T_BYTE, sizeof(jbyte), (size_t)_length);
 }
 void PerfString::set_string(const char* s2) {
   // copy n bytes of the string, assuring the null string is
   // copied if s2 == NULL.
   strncpy((char *)_valuep, s2 == NULL ? "" : s2, _length);
   // assure the string is null terminated when strlen(s2) >= _length
   ((char*)_valuep)[_length-1] = '\0';
 }
 int PerfString::format(char* buffer, int length) {
   return jio_snprintf(buffer, length, "%s", (char*)_valuep);
 }
 PerfStringConstant::PerfStringConstant(CounterNS ns, const char* namep,
                                        const char* initial_value)
                      : PerfString(ns, namep, V_Constant,
                                   initial_value == NULL ? 1 :
                                   MIN2((jint)(strlen((char*)initial_value)+1),
                                        (jint)(PerfMaxStringConstLength+1)),
                                   initial_value) {
   if (PrintMiscellaneous && Verbose) {
     if (is_valid() && initial_value != NULL &&
         ((jint)strlen(initial_value) > (jint)PerfMaxStringConstLength)) {
       warning("Truncating PerfStringConstant: name = %s,"
               " length = " INT32_FORMAT ","
               " PerfMaxStringConstLength = " INT32_FORMAT "\n",
               namep,
               (jint)strlen(initial_value),
               (jint)PerfMaxStringConstLength);
     }
   }
 }
 void PerfDataManager::destroy() {
   if (_all == NULL)
     // destroy already called, or initialization never happened
     return;
   for (int index = 0; index < _all->length(); index++) {
     PerfData* p = _all->at(index);
     delete p;
   }
   delete(_all);
   delete(_sampled);
   delete(_constants);
   _all = NULL;
   _sampled = NULL;
   _constants = NULL;
 }
 void PerfDataManager::add_item(PerfData* p, bool sampled) {
   MutexLocker ml(PerfDataManager_lock);
   if (_all == NULL) {
     _all = new PerfDataList(100);
   }
   assert(!_all->contains(p->name()), "duplicate name added");
   // add to the list of all perf data items
   _all->append(p);
   if (p->variability() == PerfData::V_Constant) {
     if (_constants == NULL) {
       _constants = new PerfDataList(25);
     }
     _constants->append(p);
     return;
   }
   if (sampled) {
     if (_sampled == NULL) {
       _sampled = new PerfDataList(25);
     }
     _sampled->append(p);
   }
 }
 PerfData* PerfDataManager::find_by_name(const char* name) {
   return _all->find_by_name(name);
 }
 PerfDataList* PerfDataManager::all() {
   MutexLocker ml(PerfDataManager_lock);
   if (_all == NULL)
     return NULL;
   PerfDataList* clone = _all->clone();
   return clone;
 }
 PerfDataList* PerfDataManager::sampled() {
   MutexLocker ml(PerfDataManager_lock);
   if (_sampled == NULL)
     return NULL;
   PerfDataList* clone = _sampled->clone();
   return clone;
 }
 PerfDataList* PerfDataManager::constants() {
   MutexLocker ml(PerfDataManager_lock);
   if (_constants == NULL)
     return NULL;
   PerfDataList* clone = _constants->clone();
   return clone;
 }
 char* PerfDataManager::counter_name(const char* ns, const char* name) {
    assert(ns != NULL, "ns string required");
    assert(name != NULL, "name string required");
    size_t len = strlen(ns) + strlen(name) + 2;
    char* result = NEW_RESOURCE_ARRAY(char, len);
    sprintf(result, "%s.%s", ns, name);
    return result;
 }
 char* PerfDataManager::name_space(const char* ns, const char* sub,
                                   int instance) {
    char intbuf[40];
    jio_snprintf(intbuf, 40, UINT32_FORMAT, instance);
    return name_space(ns, name_space(sub, intbuf));
 }
 char *PerfDataManager::name_space(const char* ns, int instance) {
    char intbuf[40];
    jio_snprintf(intbuf, 40, UINT32_FORMAT, instance);
    return name_space(ns, intbuf);
 }
 PerfStringConstant* PerfDataManager::create_string_constant(CounterNS ns,
                                                             const char* name,
                                                             const char* s,
                                                             TRAPS) {
   PerfStringConstant* p = new PerfStringConstant(ns, name, s);
   if (!p->is_valid()) {
     // allocation of native resources failed.
     delete p;
     THROW_0(vmSymbols::java_lang_OutOfMemoryError());
   }
   add_item(p, false);
   return p;
 }
 PerfLongConstant* PerfDataManager::create_long_constant(CounterNS ns,
                                                         const char* name,
                                                         PerfData::Units u,
                                                         jlong val, TRAPS) {
   PerfLongConstant* p = new PerfLongConstant(ns, name, u, val);
   if (!p->is_valid()) {
     // allocation of native resources failed.
     delete p;
     THROW_0(vmSymbols::java_lang_OutOfMemoryError());
   }
   add_item(p, false);
   return p;
 }
 PerfStringVariable* PerfDataManager::create_string_variable(CounterNS ns,
                                                             const char* name,
                                                             jint max_length,
                                                             const char* s,
                                                             TRAPS) {
   if (max_length == 0 && s != NULL) max_length = (jint)strlen(s);
   assert(max_length != 0, "PerfStringVariable with length 0");
   PerfStringVariable* p = new PerfStringVariable(ns, name, max_length, s);
   if (!p->is_valid()) {
     // allocation of native resources failed.
     delete p;
     THROW_0(vmSymbols::java_lang_OutOfMemoryError());
   }
   add_item(p, false);
   return p;
 }
 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,
                                                         const char* name,
                                                         PerfData::Units u,
                                                         jlong ival, TRAPS) {
   PerfLongVariable* p = new PerfLongVariable(ns, name, u, ival);
   if (!p->is_valid()) {
     // allocation of native resources failed.
     delete p;
     THROW_0(vmSymbols::java_lang_OutOfMemoryError());
   }
   add_item(p, false);
   return p;
 }
 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,
                                                         const char* name,
                                                         PerfData::Units u,
                                                         jlong* sp, TRAPS) {
   // Sampled counters not supported if UsePerfData is false
   if (!UsePerfData) return NULL;
   PerfLongVariable* p = new PerfLongVariable(ns, name, u, sp);
   if (!p->is_valid()) {
     // allocation of native resources failed.
     delete p;
     THROW_0(vmSymbols::java_lang_OutOfMemoryError());
   }
   add_item(p, true);
   return p;
 }
 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,
                                                         const char* name,
                                                         PerfData::Units u,
                                                         PerfSampleHelper* sh,
                                                         TRAPS) {
   // Sampled counters not supported if UsePerfData is false
   if (!UsePerfData) return NULL;
   PerfLongVariable* p = new PerfLongVariable(ns, name, u, sh);
   if (!p->is_valid()) {
     // allocation of native resources failed.
     delete p;
     THROW_0(vmSymbols::java_lang_OutOfMemoryError());
   }
   add_item(p, true);
   return p;
 }
 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,
                                                       const char* name,
                                                       PerfData::Units u,
                                                       jlong ival, TRAPS) {
   PerfLongCounter* p = new PerfLongCounter(ns, name, u, ival);
   if (!p->is_valid()) {
     // allocation of native resources failed.
     delete p;
     THROW_0(vmSymbols::java_lang_OutOfMemoryError());
   }
   add_item(p, false);
   return p;
 }
 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,
                                                       const char* name,
                                                       PerfData::Units u,
                                                       jlong* sp, TRAPS) {
   // Sampled counters not supported if UsePerfData is false
   if (!UsePerfData) return NULL;
   PerfLongCounter* p = new PerfLongCounter(ns, name, u, sp);
   if (!p->is_valid()) {
     // allocation of native resources failed.
     delete p;
     THROW_0(vmSymbols::java_lang_OutOfMemoryError());
   }
   add_item(p, true);
   return p;
 }
 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,
                                                       const char* name,
                                                       PerfData::Units u,
                                                       PerfSampleHelper* sh,
                                                       TRAPS) {
   // Sampled counters not supported if UsePerfData is false
   if (!UsePerfData) return NULL;
   PerfLongCounter* p = new PerfLongCounter(ns, name, u, sh);
   if (!p->is_valid()) {
     // allocation of native resources failed.
     delete p;
     THROW_0(vmSymbols::java_lang_OutOfMemoryError());
   }
   add_item(p, true);
   return p;
 }
 PerfDataList::PerfDataList(int length) {
   _set = new(ResourceObj::C_HEAP, mtInternal) PerfDataArray(length, true);
 }
 PerfDataList::PerfDataList(PerfDataList* p) {
   _set = new(ResourceObj::C_HEAP, mtInternal) PerfDataArray(p->length(), true);
   _set->appendAll(p->get_impl());
 }
 PerfDataList::~PerfDataList() {
   delete _set;
 }
 bool PerfDataList::by_name(void* name, PerfData* pd) {
   if (pd == NULL)
     return false;
   return strcmp((const char*)name, pd->name()) == 0;
 }
 PerfData* PerfDataList::find_by_name(const char* name) {
   // if add_item hasn't been called the list won't be initialized
   if (this == NULL)
     return NULL;
   int i = _set->find((void*)name, PerfDataList::by_name);
   if (i >= 0 && i <= _set->length())
     return _set->at(i);
   else
     return NULL;
 }
 PerfDataList* PerfDataList::clone() {
   PerfDataList* copy = new PerfDataList(this);
   assert(copy != NULL, "just checking");
   return copy;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/perfData.cpp@72053ed6f8d4 (annotated)

src/share/vm/runtime/perfData.cpp