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Code Releases Activity

Separate pools for small and large allocations cache

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This commit is contained in:
Peter Boyle
2020-05-09 22:57:21 -04:00
parent efe5bc6a3c
commit 2bb2c68e15
4 changed files with 25 additions and 8 deletions
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16
Grid/allocator/AlignedAllocator.cc
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@ -6,11 +6,23 @@ NAMESPACE_BEGIN(Grid);
MemoryStats *MemoryProfiler::stats = nullptr;
bool MemoryProfiler::debug = false;
int PointerCache::NcacheSmall = PointerCache::NcacheSmallMax;
int PointerCache::Ncache = PointerCache::NcacheMax;
int PointerCache::Victim;
int PointerCache::VictimSmall;
PointerCache::PointerCacheEntry PointerCache::Entries[PointerCache::Ncache];
PointerCache::PointerCacheEntry PointerCache::EntriesSmall[PointerCache::NcacheSmall];
PointerCache::PointerCacheEntry PointerCache::Entries[PointerCache::NcacheMax];
PointerCache::PointerCacheEntry PointerCache::EntriesSmall[PointerCache::NcacheSmallMax];
void PointerCache::Init(void)
{
char * str;
str= getenv("GRID_ALLOC_NCACHE_LARGE");
if ( str ) Ncache = atoi(str);
if ( (Ncache<0) || (Ncache > NcacheMax)) Ncache = NcacheMax;
str= getenv("GRID_ALLOC_NCACHE_SMALL");
if ( str ) NcacheSmall = atoi(str);
if ( (NcacheSmall<0) || (NcacheSmall > NcacheSmallMax)) NcacheSmall = NcacheSmallMax;
}
void *PointerCache::Insert(void *ptr,size_t bytes)
{
if (bytes < GRID_ALLOC_SMALL_LIMIT )

12
Grid/allocator/AlignedAllocator.h
View File

@ -53,8 +53,10 @@ private:
/*Pinning pages is costly*/
/*Could maintain separate large and small allocation caches*/
/* Could make these configurable, perhaps up to a max size*/
static const int NcacheSmall=128;
static const int Ncache=8;
static const int NcacheSmallMax=128;
static const int NcacheMax=16;
static int NcacheSmall;
static int Ncache;
typedef struct {
void *address;
@ -62,13 +64,13 @@ private:
int valid;
} PointerCacheEntry;
static PointerCacheEntry Entries[Ncache];
static PointerCacheEntry Entries[NcacheMax];
static int Victim;
static PointerCacheEntry EntriesSmall[NcacheSmall];
static PointerCacheEntry EntriesSmall[NcacheSmallMax];
static int VictimSmall;
public:
static void Init(void);
static void *Insert(void *ptr,size_t bytes) ;
static void *Insert(void *ptr,size_t bytes,PointerCacheEntry *entries,int ncache,int &victim) ;
static void *Lookup(size_t bytes) ;