jdk8-mips64-public/hotspot: src/share/vm/services/nmtDCmd.cpp@833b0f92429a (annotated)

src/share/vm/services/nmtDCmd.cpp@833b0f92429a (annotated)

src/share/vm/services/nmtDCmd.cpp

Wed, 27 Aug 2014 08:19:12 -0400

author: zgu
date: Wed, 27 Aug 2014 08:19:12 -0400
changeset 7074: 833b0f92429a
parent 6680: 78bbf4d43a14
child 7535: 7ae4e26cb1e0
permissions: -rw-r--r--

8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill

 /*
  * Copyright (c) 2012, 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 "runtime/mutexLocker.hpp"
 #include "services/nmtDCmd.hpp"
 #include "services/memReporter.hpp"
 #include "services/memTracker.hpp"
 #include "utilities/globalDefinitions.hpp"
 NMTDCmd::NMTDCmd(outputStream* output,
   bool heap): DCmdWithParser(output, heap),
   _summary("summary", "request runtime to report current memory summary, " \
            "which includes total reserved and committed memory, along " \
            "with memory usage summary by each subsytem.",
            "BOOLEAN", false, "false"),
   _detail("detail", "request runtime to report memory allocation >= "
            "1K by each callsite.",
            "BOOLEAN", false, "false"),
   _baseline("baseline", "request runtime to baseline current memory usage, " \
             "so it can be compared against in later time.",
             "BOOLEAN", false, "false"),
   _summary_diff("summary.diff", "request runtime to report memory summary " \
             "comparison against previous baseline.",
             "BOOLEAN", false, "false"),
   _detail_diff("detail.diff", "request runtime to report memory detail " \
             "comparison against previous baseline, which shows the memory " \
             "allocation activities at different callsites.",
             "BOOLEAN", false, "false"),
   _shutdown("shutdown", "request runtime to shutdown itself and free the " \
             "memory used by runtime.",
             "BOOLEAN", false, "false"),
   _statistics("statistics", "print tracker statistics for tuning purpose.", \
             "BOOLEAN", false, "false"),
   _scale("scale", "Memory usage in which scale, KB, MB or GB",
        "STRING", false, "KB") {
   _dcmdparser.add_dcmd_option(&_summary);
   _dcmdparser.add_dcmd_option(&_detail);
   _dcmdparser.add_dcmd_option(&_baseline);
   _dcmdparser.add_dcmd_option(&_summary_diff);
   _dcmdparser.add_dcmd_option(&_detail_diff);
   _dcmdparser.add_dcmd_option(&_shutdown);
   _dcmdparser.add_dcmd_option(&_statistics);
   _dcmdparser.add_dcmd_option(&_scale);
 }
 size_t NMTDCmd::get_scale(const char* scale) const {
   if (scale == NULL) return 0;
   return NMTUtil::scale_from_name(scale);
 }
 void NMTDCmd::execute(DCmdSource source, TRAPS) {
   // Check NMT state
   //  native memory tracking has to be on
   if (MemTracker::tracking_level() == NMT_off) {
     output()->print_cr("Native memory tracking is not enabled");
     return;
   } else if (MemTracker::tracking_level() == NMT_minimal) {
      output()->print_cr("Native memory tracking has been shutdown");
      return;
   }
   const char* scale_value = _scale.value();
   size_t scale_unit = get_scale(scale_value);
   if (scale_unit == 0) {
     output()->print_cr("Incorrect scale value: %s", scale_value);
     return;
   }
   int nopt = 0;
   if (_summary.is_set() && _summary.value()) { ++nopt; }
   if (_detail.is_set() && _detail.value()) { ++nopt; }
   if (_baseline.is_set() && _baseline.value()) { ++nopt; }
   if (_summary_diff.is_set() && _summary_diff.value()) { ++nopt; }
   if (_detail_diff.is_set() && _detail_diff.value()) { ++nopt; }
   if (_shutdown.is_set() && _shutdown.value()) { ++nopt; }
   if (_statistics.is_set() && _statistics.value()) { ++nopt; }
   if (nopt > 1) {
       output()->print_cr("At most one of the following option can be specified: " \
         "summary, detail, baseline, summary.diff, detail.diff, shutdown");
       return;
   } else if (nopt == 0) {
     if (_summary.is_set()) {
       output()->print_cr("No command to execute");
       return;
     } else {
       _summary.set_value(true);
     }
   }
   // Serialize NMT query
   MutexLocker locker(MemTracker::query_lock());
   if (_summary.value()) {
     report(true, scale_unit);
   } else if (_detail.value()) {
     if (!check_detail_tracking_level(output())) {
     return;
   }
     report(false, scale_unit);
   } else if (_baseline.value()) {
     MemBaseline& baseline = MemTracker::get_baseline();
     if (!baseline.baseline(MemTracker::tracking_level() != NMT_detail)) {
       output()->print_cr("Baseline failed");
     } else {
       output()->print_cr("Baseline succeeded");
     }
   } else if (_summary_diff.value()) {
     MemBaseline& baseline = MemTracker::get_baseline();
     if (baseline.baseline_type() >= MemBaseline::Summary_baselined) {
       report_diff(true, scale_unit);
     } else {
       output()->print_cr("No baseline for comparison");
     }
   } else if (_detail_diff.value()) {
     if (!check_detail_tracking_level(output())) {
     return;
   }
     MemBaseline& baseline = MemTracker::get_baseline();
     if (baseline.baseline_type() == MemBaseline::Detail_baselined) {
       report_diff(false, scale_unit);
     } else {
       output()->print_cr("No detail baseline for comparison");
     }
   } else if (_shutdown.value()) {
     MemTracker::shutdown();
     output()->print_cr("Native memory tracking has been turned off");
   } else if (_statistics.value()) {
     if (check_detail_tracking_level(output())) {
       MemTracker::tuning_statistics(output());
     }
   } else {
     ShouldNotReachHere();
     output()->print_cr("Unknown command");
   }
 }
 int NMTDCmd::num_arguments() {
   ResourceMark rm;
   NMTDCmd* dcmd = new NMTDCmd(NULL, false);
   if (dcmd != NULL) {
     DCmdMark mark(dcmd);
     return dcmd->_dcmdparser.num_arguments();
   } else {
     return 0;
   }
 }
 void NMTDCmd::report(bool summaryOnly, size_t scale_unit) {
   MemBaseline baseline;
   if (baseline.baseline(summaryOnly)) {
     if (summaryOnly) {
       MemSummaryReporter rpt(baseline, output(), scale_unit);
       rpt.report();
     } else {
       MemDetailReporter rpt(baseline, output(), scale_unit);
       rpt.report();
     }
   }
 }
 void NMTDCmd::report_diff(bool summaryOnly, size_t scale_unit) {
   MemBaseline& early_baseline = MemTracker::get_baseline();
   assert(early_baseline.baseline_type() != MemBaseline::Not_baselined,
     "Not yet baselined");
   assert(summaryOnly || early_baseline.baseline_type() == MemBaseline::Detail_baselined,
     "Not a detail baseline");
   MemBaseline baseline;
   if (baseline.baseline(summaryOnly)) {
     if (summaryOnly) {
       MemSummaryDiffReporter rpt(early_baseline, baseline, output(), scale_unit);
       rpt.report_diff();
     } else {
       MemDetailDiffReporter rpt(early_baseline, baseline, output(), scale_unit);
       rpt.report_diff();
     }
   }
 }
 bool NMTDCmd::check_detail_tracking_level(outputStream* out) {
   if (MemTracker::tracking_level() == NMT_detail) {
     return true;
   } else if (MemTracker::cmdline_tracking_level() == NMT_detail) {
     out->print_cr("Tracking level has been downgraded due to lack of resources");
     return false;
   } else {
     out->print_cr("Detail tracking is not enabled");
     return false;
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/nmtDCmd.cpp@833b0f92429a (annotated)

src/share/vm/services/nmtDCmd.cpp