RSS usage tuning for 64K pages
This patch lowers TCMalloc RSS usage when TCMALLOC_LARGE_PAGES64K is
defined by tuning page scavenge values.
diff --git a/src/page_heap.h b/src/page_heap.h
index 18abed1..f4c9752 100644
--- a/src/page_heap.h
+++ b/src/page_heap.h
@@ -214,11 +214,21 @@
// Never delay scavenging for more than the following number of
// deallocated pages. With 4K pages, this comes to 4GB of
// deallocation.
+#ifndef TCMALLOC_LARGE_PAGES64K
static const int kMaxReleaseDelay = 1 << 20;
+#else
+ // With 64K pages this come to 16M
+ static const int kMaxReleaseDelay = 1 << 8;
+#endif
// If there is nothing to release, wait for so many pages before
// scavenging again. With 4K pages, this comes to 1GB of memory.
+#ifndef TCMALLOC_LARGE_PAGES64K
static const int kDefaultReleaseDelay = 1 << 18;
+#else
+ // WIth 64K pages, this comes to 4MB
+ static const int kDefaultReleaseDelay = 1 << 6;
+#endif
// Pick the appropriate map and cache types based on pointer size
typedef MapSelector<kAddressBits>::Type PageMap;
