RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-23 03:02:36 +01:00
Code Issues Projects Releases Wiki Activity

Special case Recycler::clear(BumpPtrAllocator).

Browse Source 
A BumpPtrAllocator has an empty Deallocate() method, but
Recycler::clear() would still call it for every single object ever
allocated, bringing all those objects into cache. As a bonus,
iplist::remove() will also write to the Prev/Next pointers on all the
objects, so all those cache lines have to be written back to RAM before
the pages are given back to the OS.

Stop wasting time and memory bandwith by using the new
clearAndLeakUnsafely() function to jettison all the recycled objects.

llvm-svn: 171541
This commit is contained in:
Jakob Stoklund Olesen 2013-01-04 22:35:45 +00:00
parent 499d789d2b
commit 4c9d7d3d77
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
include/llvm/Support/Recycler.h
View File

@ -22,6 +22,8 @@
namespace llvm {
class BumpPtrAllocator;
/// PrintRecyclingAllocatorStats - Helper for RecyclingAllocator for
/// printing statistics.
///
@ -87,6 +89,15 @@ public:
}
}
/// Special case for BumpPtrAllocator which has an empty Deallocate()
/// function.
///
/// There is no need to traverse the free list, pulling all the objects into
/// cache.
void clear(BumpPtrAllocator&) {
FreeList.clearAndLeakNodesUnsafely();
}
template<class SubClass, class AllocatorType>
SubClass *Allocate(AllocatorType &Allocator) {
assert(sizeof(SubClass) <= Size &&