rev 50068 : [mq]: metaspace-split

   1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2018, SAP and/or its affiliates. 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 
  28 #include "memory/metaspace/metaspaceCommon.hpp"


  29 #include "utilities/globalDefinitions.hpp"
  30 #include "utilities/ostream.hpp"
  31 
  32 namespace metaspace {
  33 namespace internals {
  34 


  35 // Print a size, in words, scaled.
  36 void print_scaled_words(outputStream* st, size_t word_size, size_t scale, int width) {
  37   print_human_readable_size(st, word_size * sizeof(MetaWord), scale, width);
  38 }
  39 
  40 // Convenience helper: prints a size value and a percentage.
  41 void print_scaled_words_and_percentage(outputStream* st, size_t word_size, size_t compare_word_size, size_t scale, int width) {
  42   print_scaled_words(st, word_size, scale, width);
  43   st->print(" (");
  44   print_percentage(st, compare_word_size, word_size);
  45   st->print(")");
  46 }
  47 
  48 
  49 // Print a human readable size.
  50 // byte_size: size, in bytes, to be printed.
  51 // scale: one of 1 (byte-wise printing), sizeof(word) (word-size printing), K, M, G (scaled by KB, MB, GB respectively,
  52 //         or 0, which means the best scale is choosen dynamically.
  53 // width: printing width.
  54 void print_human_readable_size(outputStream* st, size_t byte_size, size_t scale, int width)  {
  55   if (scale == 0) {
  56     // Dynamic mode. Choose scale for this value.
  57     if (byte_size == 0) {
  58       // Zero values are printed as bytes.
  59       scale = 1;
  60     } else {
  61       if (byte_size >= G) {
  62         scale = G;
  63       } else if (byte_size >= M) {
  64         scale = M;
  65       } else if (byte_size >= K) {
  66         scale = K;
  67       } else {
  68         scale = 1;
  69       }
  70     }
  71     return print_human_readable_size(st, byte_size, scale, width);
  72   }
  73 
  74 #ifdef ASSERT
  75   assert(scale == 1 || scale == BytesPerWord || scale == K || scale == M || scale == G, "Invalid scale");
  76   // Special case: printing wordsize should only be done with word-sized values
  77   if (scale == BytesPerWord) {
  78     assert(byte_size % BytesPerWord == 0, "not word sized");
  79   }
  80 #endif
  81 
  82   if (scale == 1) {
  83     st->print("%*" PRIuPTR " bytes", width, byte_size);
  84   } else if (scale == BytesPerWord) {
  85     st->print("%*" PRIuPTR " words", width, byte_size / BytesPerWord);
  86   } else {
  87     const char* display_unit = "";
  88     switch(scale) {
  89       case 1: display_unit = "bytes"; break;
  90       case BytesPerWord: display_unit = "words"; break;
  91       case K: display_unit = "KB"; break;
  92       case M: display_unit = "MB"; break;
  93       case G: display_unit = "GB"; break;
  94       default:
  95         ShouldNotReachHere();
  96     }
  97     float display_value = (float) byte_size / scale;
  98     // Since we use width to display a number with two trailing digits, increase it a bit.
  99     width += 3;
 100     // Prevent very small but non-null values showing up as 0.00.
 101     if (byte_size > 0 && display_value < 0.01f) {
 102       st->print("%*s %s", width, "<0.01", display_unit);
 103     } else {
 104       st->print("%*.2f %s", width, display_value, display_unit);
 105     }
 106   }
 107 }
 108 
 109 // Prints a percentage value. Values smaller than 1% but not 0 are displayed as "<1%", values
 110 // larger than 99% but not 100% are displayed as ">100%".
 111 void print_percentage(outputStream* st, size_t total, size_t part) {
 112   if (total == 0) {
 113     st->print("  ?%%");
 114   } else if (part == 0) {
 115     st->print("  0%%");
 116   } else if (part == total) {
 117     st->print("100%%");
 118   } else {
 119     // Note: clearly print very-small-but-not-0% and very-large-but-not-100% percentages.
 120     float p = ((float)part / total) * 100.0f;
 121     if (p < 1.0f) {
 122       st->print(" <1%%");
 123     } else if (p > 99.0f){
 124       st->print(">99%%");
 125     } else {
 126       st->print("%3.0f%%", p);
 127     }
 128   }
 129 }

































































 130 
 131 } // namespace internals
 132 } // namespace metaspace
--- EOF ---