/* * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2023, 2024, Red Hat, Inc. and/or its affiliates. * 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 "nmt/memMapPrinter.hpp" #include "procMapsParser.hpp" #include "runtime/os.hpp" #include "utilities/align.hpp" #include "utilities/globalDefinitions.hpp" #include "utilities/ostream.hpp" #include "utilities/powerOfTwo.hpp" #include class ProcSmapsSummary { unsigned _num_mappings; size_t _vsize; // combined virtual size size_t _rss; // combined resident set size size_t _committed; // combined committed size size_t _shared; // combined shared size size_t _swapped_out; // combined amount of swapped-out memory size_t _hugetlb; // combined amount of memory backed by explicit huge pages size_t _thp; // combined amount of memory backed by THPs public: ProcSmapsSummary() : _num_mappings(0), _vsize(0), _rss(0), _committed(0), _shared(0), _swapped_out(0), _hugetlb(0), _thp(0) {} void add_mapping(const ProcSmapsInfo& info) { _num_mappings++; _vsize += info.vsize(); _rss += info.rss; _committed += info.nr ? 0 : info.vsize(); _shared += info.sh ? info.vsize() : 0; _swapped_out += info.swap; _hugetlb += info.private_hugetlb + info.shared_hugetlb; _thp += info.anonhugepages; } void print_on(const MappingPrintSession& session) const { outputStream* st = session.out(); st->print_cr("Number of mappings: %u", _num_mappings); st->print_cr(" vsize: %zu (" PROPERFMT ")", _vsize, PROPERFMTARGS(_vsize)); st->print_cr(" rss: %zu (" PROPERFMT ")", _rss, PROPERFMTARGS(_rss)); st->print_cr(" committed: %zu (" PROPERFMT ")", _committed, PROPERFMTARGS(_committed)); st->print_cr(" shared: %zu (" PROPERFMT ")", _shared, PROPERFMTARGS(_shared)); st->print_cr(" swapped out: %zu (" PROPERFMT ")", _swapped_out, PROPERFMTARGS(_swapped_out)); st->print_cr(" using thp: %zu (" PROPERFMT ")", _thp, PROPERFMTARGS(_thp)); st->print_cr(" hugetlb: %zu (" PROPERFMT ")", _hugetlb, PROPERFMTARGS(_hugetlb)); } }; class ProcSmapsPrinter { const MappingPrintSession& _session; public: ProcSmapsPrinter(const MappingPrintSession& session) : _session(session) {} void print_single_mapping(const ProcSmapsInfo& info) const { outputStream* st = _session.out(); #define INDENT_BY(n) \ if (st->fill_to(n) == 0) { \ st->print(" "); \ } st->print(PTR_FORMAT "-" PTR_FORMAT, p2i(info.from), p2i(info.to)); INDENT_BY(38); st->print("%12zu", info.vsize()); INDENT_BY(51); st->print("%s", info.prot); INDENT_BY(56); st->print("%12zu", info.rss); INDENT_BY(69); st->print("%12zu", info.private_hugetlb); INDENT_BY(82); st->print(EXACTFMT, EXACTFMTARGS(info.kernelpagesize)); { INDENT_BY(87); int num_printed = 0; #define PRINTIF(cond, s) \ if (cond) { \ st->print("%s%s", (num_printed > 0 ? "," : ""), s); \ num_printed++; \ } PRINTIF(info.sh, "shrd"); PRINTIF(!info.nr, "com"); PRINTIF(info.swap > 0, "swap"); PRINTIF(info.ht, "huge"); PRINTIF(info.anonhugepages > 0, "thp"); PRINTIF(info.hg, "thpad"); PRINTIF(info.nh, "nothp"); if (num_printed == 0) { st->print("-"); } #undef PRINTIF } INDENT_BY(104); if (!_session.print_nmt_info_for_region(info.from, info.to)) { st->print("-"); } INDENT_BY(142); st->print_raw(info.filename[0] == '\0' ? "-" : info.filename); #undef INDENT_BY st->cr(); } void print_legend() const { outputStream* st = _session.out(); st->print_cr("from, to, vsize: address range and size"); st->print_cr("prot: protection"); st->print_cr("rss: resident set size"); st->print_cr("hugetlb: size of private hugetlb pages"); st->print_cr("pgsz: page size"); st->print_cr("notes: mapping information (detail mode only)"); st->print_cr(" shrd: mapping is shared"); st->print_cr(" com: mapping committed (swap space reserved)"); st->print_cr(" swap: mapping partly or completely swapped out"); st->print_cr(" thp: mapping uses THP"); st->print_cr(" thpad: mapping is THP-madvised"); st->print_cr(" nothp: mapping is forbidden to use THP"); st->print_cr(" huge: mapping uses hugetlb pages"); st->print_cr("vm info: VM information (requires NMT)"); { StreamIndentor si(st, 16); _session.print_nmt_flag_legend(); } st->print_cr("file: file mapped, if mapping is not anonymous"); } void print_header() const { outputStream* st = _session.out(); // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 // 012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789 // 0x0000000414000000-0x0000000453000000 123456789012 rw-p 123456789012 123456789012 16g thp,thpadv STACK-340754-Monitor-Deflation-Thread /shared/tmp.txt st->print_cr("from to vsize prot rss hugetlb pgsz notes info file"); st->print_cr("========================================================================================================================================================================"); } }; void MemMapPrinter::pd_print_all_mappings(const MappingPrintSession& session) { constexpr char filename[] = "/proc/self/smaps"; FILE* f = os::fopen(filename, "r"); if (f == nullptr) { session.out()->print_cr("Cannot open %s", filename); return; } ProcSmapsPrinter printer(session); ProcSmapsSummary summary; outputStream* const st = session.out(); printer.print_legend(); st->cr(); printer.print_header(); ProcSmapsInfo info; ProcSmapsParser parser(f); while (parser.parse_next(info)) { printer.print_single_mapping(info); summary.add_mapping(info); } st->cr(); summary.print_on(session); st->cr(); ::fclose(f); }