chunklevel.cpp

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#include "precompiled.hpp"
#include "memory/metaspace/chunklevel.hpp"
#include "utilities/debug.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/ostream.hpp"
#include "utilities/powerOfTwo.hpp"

namespace metaspace {

using namespace chunklevel;

chunklevel_t chunklevel::level_fitting_word_size(size_t word_size) {
  assert(MAX_CHUNK_WORD_SIZE >= word_size,
         SIZE_FORMAT " - too large allocation size.", word_size * BytesPerWord);
  if (word_size <= MIN_CHUNK_WORD_SIZE) {
    return HIGHEST_CHUNK_LEVEL;
  }
  const size_t v_pow2 = round_up_power_of_2(word_size);
  const chunklevel_t lvl =  (chunklevel_t)(exact_log2(MAX_CHUNK_WORD_SIZE) - exact_log2(v_pow2));
  return lvl;
}

void chunklevel::print_chunk_size(outputStream* st, chunklevel_t lvl) {
  if (chunklevel::is_valid_level(lvl)) {
    const size_t s = chunklevel::word_size_for_level(lvl) * BytesPerWord;
    if (s < 1 * M) {
      st->print("%3uk", (unsigned)(s / K));
    } else {
      st->print("%3um", (unsigned)(s / M));
    }
  } else {
    st->print("?-?");
  }
}

} // namespace metaspace