Mercurial > hg > graal-jvmci-8

diff src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 3285:49a67202bc67

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
7011855: G1: non-product flag to artificially grow the heap Summary: It introduces non-product cmd line parameter G1DummyRegionsPerGC which indicates how many "dummy" regions to allocate at the end of each GC. This allows the G1 heap to grow artificially and makes concurrent marking cycles more frequent irrespective of what the application that is running is doing. The dummy regions will be found totally empty during cleanup so this parameter can also be used to stress the concurrent cleanup operation. Reviewed-by: brutisso, johnc
author tonyp
date Tue, 19 Apr 2011 15:46:59 -0400
parents 371bbc844bf1
children b52782ae3880
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	Mon Apr 18 16:27:16 2011 -0700
+++ b/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	Tue Apr 19 15:46:59 2011 -0400
@@ -298,6 +298,14 @@
   // started is maintained in _total_full_collections in CollectedHeap.
   volatile unsigned int _full_collections_completed;
 
+  // This is a non-product method that is helpful for testing. It is
+  // called at the end of a GC and artificially expands the heap by
+  // allocating a number of dead regions. This way we can induce very
+  // frequent marking cycles and stress the cleanup / concurrent
+  // cleanup code more (as all the regions that will be allocated by
+  // this method will be found dead by the marking cycle).
+  void allocate_dummy_regions() PRODUCT_RETURN;
+
   // These are macros so that, if the assert fires, we get the correct
   // line number, file, etc.