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8209387: Follow ups to JDK-8195100 Use a low latency hashtable for SymbolTable

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Use size_t, replaced macros with const, reverted incorrect API name change.

Reviewed-by: coleenp, kbarrett
This commit is contained in:
Gerard Ziemski 2018-12-10 11:59:55 -06:00
parent c04c838b87
commit 949269e785
4 changed files with 30 additions and 29 deletions
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16
src/hotspot/share/classfile/stringTable.cpp
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@ -54,13 +54,13 @@
#include "utilities/macros.hpp"
// We prefer short chains of avg 2
#define PREF_AVG_LIST_LEN 2
const double PREF_AVG_LIST_LEN = 2.0;
// 2^24 is max size
#define END_SIZE 24
const size_t END_SIZE = 24;
// If a chain gets to 32 something might be wrong
#define REHASH_LEN 32
const size_t REHASH_LEN = 32;
// If we have as many dead items as 50% of the number of bucket
#define CLEAN_DEAD_HIGH_WATER_MARK 0.5
const double CLEAN_DEAD_HIGH_WATER_MARK = 0.5;
#if INCLUDE_CDS_JAVA_HEAP
inline oop read_string_from_compact_hashtable(address base_address, u4 offset) {
@ -216,7 +216,7 @@ size_t StringTable::item_added() {
return Atomic::add((size_t)1, &(the_table()->_items_count));
}
size_t StringTable::add_items_count_to_clean(size_t ndead) {
size_t StringTable::add_items_to_clean(size_t ndead) {
size_t total = Atomic::add((size_t)ndead, &(the_table()->_uncleaned_items_count));
log_trace(stringtable)(
"Uncleaned items:" SIZE_FORMAT " added: " SIZE_FORMAT " total:" SIZE_FORMAT,
@ -228,11 +228,11 @@ void StringTable::item_removed() {
Atomic::add((size_t)-1, &(the_table()->_items_count));
}
double StringTable::get_load_factor() {
double StringTable::get_load_factor() const {
return (double)_items_count/_current_size;
}
double StringTable::get_dead_factor() {
double StringTable::get_dead_factor() const {
return (double)_uncleaned_items_count/_current_size;
}
@ -432,7 +432,7 @@ void StringTable::possibly_parallel_unlink(
_par_state_string->weak_oops_do(&stiac, &dnc);
// Accumulate the dead strings.
the_table()->add_items_count_to_clean(stiac._count);
the_table()->add_items_to_clean(stiac._count);
*processed = stiac._count_total;
*removed = stiac._count;