1 /* 2 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2020 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "memory/metaspace/msChunklevel.hpp" 28 #include "utilities/debug.hpp" 29 #include "utilities/globalDefinitions.hpp" 30 #include "utilities/ostream.hpp" 31 #include "utilities/powerOfTwo.hpp" 32 33 namespace metaspace { 34 35 using namespace chunklevel; 36 37 chunklevel_t chunklevel::level_fitting_word_size(size_t word_size) { 38 39 assert(MAX_CHUNK_WORD_SIZE >= word_size, 40 SIZE_FORMAT " - too large allocation size.", word_size * BytesPerWord); 41 42 if (word_size <= MIN_CHUNK_WORD_SIZE) { 43 return HIGHEST_CHUNK_LEVEL; 44 } 45 46 const size_t v_pow2 = round_up_power_of_2(word_size); 47 const chunklevel_t lvl = (chunklevel_t)(exact_log2(MAX_CHUNK_WORD_SIZE) - exact_log2(v_pow2)); 48 49 return lvl; 50 51 } 52 53 void chunklevel::print_chunk_size(outputStream* st, chunklevel_t lvl) { 54 if (chunklevel::is_valid_level(lvl)) { 55 const size_t s = chunklevel::word_size_for_level(lvl) * BytesPerWord; 56 if (s < 1 * M) { 57 st->print("%3uk", (unsigned)(s / K)); 58 } else { 59 st->print("%3um", (unsigned)(s / M)); 60 } 61 } else { 62 st->print("?-?"); 63 } 64 65 } 66 67 } // namespace metaspace 68