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Add dalvik.vm.gctype to enable switching between different GCs.

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The option passes the specified GC type into the Xgc runtime
option.

Currently the three different supported GC types are MS, CMS, SS
which represent mark-sweep, concurrent mark-sweep, mark-sweep +
semi-space hybrid.

Change-Id: I6ad95c8d12c0d1158f7c861ff0c3180761619172
This commit is contained in:
Mathieu Chartier
2013-12-02 15:46:51 -08:00
parent f226bc606a
commit 7e4fdec6f0
1 changed files with 8 additions and 0 deletions
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8
core/jni/AndroidRuntime.cpp
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@@ -448,6 +448,7 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv)
char heapgrowthlimitOptsBuf[sizeof("-XX:HeapGrowthLimit=")-1 + PROPERTY_VALUE_MAX];
char heapminfreeOptsBuf[sizeof("-XX:HeapMinFree=")-1 + PROPERTY_VALUE_MAX];
char heapmaxfreeOptsBuf[sizeof("-XX:HeapMaxFree=")-1 + PROPERTY_VALUE_MAX];
char gctypeOptsBuf[sizeof("-Xgc:")-1 + PROPERTY_VALUE_MAX];
char heaptargetutilizationOptsBuf[sizeof("-XX:HeapTargetUtilization=")-1 + PROPERTY_VALUE_MAX];
char jitcodecachesizeOptsBuf[sizeof("-Xjitcodecachesize:")-1 + PROPERTY_VALUE_MAX];
char extraOptsBuf[PROPERTY_VALUE_MAX];
@@ -583,6 +584,13 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv)
mOptions.add(opt);
}
strcpy(gctypeOptsBuf, "-Xgc:");
property_get("dalvik.vm.gctype", gctypeOptsBuf+5, "");
if (gctypeOptsBuf[5] != '\0') {
opt.optionString = gctypeOptsBuf;
mOptions.add(opt);
}
/*
* Enable or disable dexopt features, such as bytecode verification and
* calculation of register maps for precise GC.