commit 10d6886c9ce3ed87431cf10d376a69c23950fa61
author Mathieu Chartier <mathieuc@google.com> Wed Apr 15 14:21:33 2015 -0700
committer Mathieu Chartier <mathieuc@google.com> Wed Apr 15 14:42:50 2015 -0700
tree 52cfc18e941d78e480c5fdacda57721083b5e51f
parent a76a08fed88bd081bcc4d240f1ba3472a2acbbab

Disable parallel GC by default

Not using parallel GC seems to reduce avg pauses by ~0.1s on
EvaluateAndApplyChanges. Avoiding creating the thread pool should
help app launch slightly and reduce memory ussage.

Change-Id: Iebec2a17701c76e4145b41d7c0b4f6dd17806efa

runtime/runtime_options.def

diff --git a/runtime/runtime_options.def b/runtime/runtime_options.def
index 339f925..e420d52 100644
--- a/runtime/runtime_options.def
+++ b/runtime/runtime_options.def
@@ -50,7 +50,7 @@
 RUNTIME_OPTIONS_KEY (MemoryKiB,           NonMovingSpaceCapacity,         gc::Heap::kDefaultNonMovingSpaceCapacity)
 RUNTIME_OPTIONS_KEY (double,              HeapTargetUtilization,          gc::Heap::kDefaultTargetUtilization)
 RUNTIME_OPTIONS_KEY (double,              ForegroundHeapGrowthMultiplier, gc::Heap::kDefaultHeapGrowthMultiplier)
-RUNTIME_OPTIONS_KEY (unsigned int,        ParallelGCThreads,              1u)
+RUNTIME_OPTIONS_KEY (unsigned int,        ParallelGCThreads,              0u)
 RUNTIME_OPTIONS_KEY (unsigned int,        ConcGCThreads)
 RUNTIME_OPTIONS_KEY (Memory<1>,           StackSize)  // -Xss
 RUNTIME_OPTIONS_KEY (unsigned int,        MaxSpinsBeforeThinLockInflation,Monitor::kDefaultMaxSpinsBeforeThinLockInflation)