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8071312: compiler/arguments/CheckCompileThresholdScaling.java fails

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Change the way VM handles CompileThresholdScaling==0, update test

Reviewed-by: kvn, drchase, fzhinkin
This commit is contained in:
Zoltan Majo 2015-01-26 10:43:42 +01:00
parent b7eaaba943
commit 1da8218179
2 changed files with 33 additions and 19 deletions
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10
hotspot/src/share/vm/runtime/arguments.cpp
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@ -1127,7 +1127,7 @@ static void no_shared_spaces(const char* message) {
#endif
intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
if (scale == 1.0 || scale < 0.0) {
if (scale == 1.0 || scale <= 0.0) {
return threshold;
} else {
return (intx)(threshold * scale);
@ -1143,7 +1143,7 @@ intx Arguments::scaled_freq_log(intx freq_log, double scale) {
// Check value to avoid calculating log2 of 0.
if (scale == 0.0) {
return 1;
return freq_log;
}
intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
@ -3479,8 +3479,10 @@ jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_req
set_mode_flags(_int);
}
if ((TieredCompilation && CompileThresholdScaling == 0)
|| (!TieredCompilation && scaled_compile_threshold(CompileThreshold) == 0)) {
// CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
// but like -Xint, leave compilation thresholds unaffected.
// With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
set_mode_flags(_int);
}