Mercurial > hg > truffle
diff src/share/vm/services/nmtDCmd.cpp @ 6197:d2a62e0f25eb
6995781: Native Memory Tracking (Phase 1)
7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain
author | zgu |
---|---|
date | Thu, 28 Jun 2012 17:03:16 -0400 |
parents | |
children | 3f84e17b6bca |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/services/nmtDCmd.cpp Thu Jun 28 17:03:16 2012 -0400 @@ -0,0 +1,172 @@ +/* + * Copyright (c) 2012, 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 "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"), +#ifndef PRODUCT + _debug("debug", "print tracker statistics. Debug only, not thread safe", \ + "BOOLEAN", false, "false"), +#endif + _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); +#ifndef PRODUCT + _dcmdparser.add_dcmd_option(&_debug); +#endif + _dcmdparser.add_dcmd_option(&_scale); +} + +void NMTDCmd::execute(TRAPS) { + const char* scale_value = _scale.value(); + size_t scale_unit; + if (strcmp(scale_value, "KB") == 0 || strcmp(scale_value, "kb") == 0) { + scale_unit = K; + } else if (strcmp(scale_value, "MB") == 0 || + strcmp(scale_value, "mb") == 0) { + scale_unit = M; + } else if (strcmp(scale_value, "GB") == 0 || + strcmp(scale_value, "gb") == 0) { + scale_unit = G; + } else { + output()->print_cr("Incorrect scale value: %s", scale_value); + return; + } + + int nopt = 0; + if(_summary.is_set()) { ++nopt; } + if(_detail.is_set()) { ++nopt; } + if(_baseline.is_set()) { ++nopt; } + if(_summary_diff.is_set()) { ++nopt; } + if(_detail_diff.is_set()) { ++nopt; } + if(_shutdown.is_set()) { ++nopt; } +#ifndef PRODUCT + if(_debug.is_set()) { ++nopt; } +#endif + + if(nopt > 1) { + output()->print_cr("At most one of the following option can be specified: " \ + "summary, detail, baseline, summary.diff, detail.diff, shutdown" +#ifndef PRODUCT + " ,debug" +#endif + ); + return; + } + + if(nopt == 0) { + _summary.set_value(true); + } + +#ifndef PRODUCT + if (_debug.value()) { + output()->print_cr("debug command is NOT thread-safe, may cause crash"); + MemTracker::print_tracker_stats(output()); + return; + } +#endif + + // native memory tracking has to be on + if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { + // if it is not on, what's the reason? + output()->print_cr(MemTracker::reason()); + return; + } + + if (_summary.value()) { + BaselineTTYOutputer outputer(output()); + MemTracker::print_memory_usage(outputer, scale_unit, true); + } else if (_detail.value()) { + BaselineTTYOutputer outputer(output()); + MemTracker::print_memory_usage(outputer, scale_unit, false); + } else if (_baseline.value()) { + if (MemTracker::baseline()) { + output()->print_cr("Successfully baselined."); + } else { + output()->print_cr("Baseline failed."); + } + } else if (_summary_diff.value()) { + if (MemTracker::has_baseline()) { + BaselineTTYOutputer outputer(output()); + MemTracker::compare_memory_usage(outputer, scale_unit, true); + } else { + output()->print_cr("No baseline to compare, run 'baseline' command first"); + } + } else if (_detail_diff.value()) { + if (MemTracker::has_baseline()) { + BaselineTTYOutputer outputer(output()); + MemTracker::compare_memory_usage(outputer, scale_unit, false); + } else { + output()->print_cr("No baseline to compare to, run 'baseline' command first"); + } + } else if (_shutdown.value()) { + MemTracker::shutdown(MemTracker::NMT_shutdown_user); + output()->print_cr("Shutdown is in progress, it will take a few moments to " \ + "completely shutdown"); + } 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; + } +} +