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7158800: Improve storage of symbol tables

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Use an alternate version of hashing algorithm for symbol string tables and after a certain bucket size to improve performance

Reviewed-by: pbk, kamg, dlong, kvn, fparain
This commit is contained in:
Coleen Phillimore 2012-06-13 19:52:59 -04:00
parent 7c17e9e75b
commit 55b09e7016
17 changed files with 32031 additions and 55 deletions
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17
hotspot/src/share/vm/runtime/safepoint.cpp
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@ -23,6 +23,7 @@
*/
#include "precompiled.hpp"
#include "classfile/symbolTable.hpp"
#include "classfile/systemDictionary.hpp"
#include "code/codeCache.hpp"
#include "code/icBuffer.hpp"
@ -526,8 +527,20 @@ void SafepointSynchronize::do_cleanup_tasks() {
CompilationPolicy::policy()->do_safepoint_work();
}
TraceTime t4("sweeping nmethods", TraceSafepointCleanupTime);
NMethodSweeper::scan_stacks();
{
TraceTime t4("sweeping nmethods", TraceSafepointCleanupTime);
NMethodSweeper::scan_stacks();
}
if (SymbolTable::needs_rehashing()) {
TraceTime t5("rehashing symbol table", TraceSafepointCleanupTime);
SymbolTable::rehash_table();
}
if (StringTable::needs_rehashing()) {
TraceTime t6("rehashing string table", TraceSafepointCleanupTime);
StringTable::rehash_table();
}
// rotate log files?
if (UseGCLogFileRotation) {