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6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld

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Add safepoint after CompileTheWorldSafepointInterval (100) compilations and do full sweep of CodeCache each time.

Reviewed-by: never
This commit is contained in:
Eric Caspole 2010-01-26 08:53:24 -08:00 committed by Vladimir Kozlov
parent bac125984c
commit f557cc8bd0
3 changed files with 20 additions and 0 deletions
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8
hotspot/src/share/vm/classfile/classLoader.cpp
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@ -1249,6 +1249,7 @@ void ClassLoader::compile_the_world() {
} }
int ClassLoader::_compile_the_world_counter = 0; int ClassLoader::_compile_the_world_counter = 0;
static int _codecache_sweep_counter = 0;
void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
int len = (int)strlen(name); int len = (int)strlen(name);
@ -1293,6 +1294,13 @@ void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
for (int n = 0; n < k->methods()->length(); n++) { for (int n = 0; n < k->methods()->length(); n++) {
methodHandle m (THREAD, methodOop(k->methods()->obj_at(n))); methodHandle m (THREAD, methodOop(k->methods()->obj_at(n)));
if (CompilationPolicy::canBeCompiled(m)) { if (CompilationPolicy::canBeCompiled(m)) {
if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) {
// Give sweeper a chance to keep up with CTW
VM_ForceSafepoint op;
VMThread::execute(&op);
_codecache_sweep_counter = 0;
}
// Force compilation // Force compilation
CompileBroker::compile_method(m, InvocationEntryBci, CompileBroker::compile_method(m, InvocationEntryBci,
methodHandle(), 0, "CTW", THREAD); methodHandle(), 0, "CTW", THREAD);

9
hotspot/src/share/vm/runtime/arguments.cpp
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@ -2815,6 +2815,15 @@ jint Arguments::parse(const JavaVMInitArgs* args) {
DebugNonSafepoints = true; DebugNonSafepoints = true;
} }
#ifndef PRODUCT
if (CompileTheWorld) {
// Force NmethodSweeper to sweep whole CodeCache each time.
if (FLAG_IS_DEFAULT(NmethodSweepFraction)) {
NmethodSweepFraction = 1;
}
}
#endif
if (PrintCommandLineFlags) { if (PrintCommandLineFlags) {
CommandLineFlags::printSetFlags(); CommandLineFlags::printSetFlags();
} }

3
hotspot/src/share/vm/runtime/globals.hpp
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@ -2447,6 +2447,9 @@ class CommandLineFlags {
notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \
"Compile all methods although class initializer failed") \ "Compile all methods although class initializer failed") \
\ \
notproduct(intx, CompileTheWorldSafepointInterval, 100, \
"Force a safepoint every n compiles so sweeper can keep up") \
\
develop(bool, TraceIterativeGVN, false, \ develop(bool, TraceIterativeGVN, false, \
"Print progress during Iterative Global Value Numbering") \ "Print progress during Iterative Global Value Numbering") \
\ \