protected override int GetCurrentPressure()
{
int num = GC.CollectionCount(2);
SRef ref2 = this._sizedRef;
if ((num != this._gen2Count) && (ref2 != null))
{
this._gen2Count = num;
this._idx ^= 1;
this._cacheSizeSampleTimes[this._idx] = DateTime.UtcNow;
this._cacheSizeSamples[this._idx] = ref2.ApproximateSize;
IMemoryCacheManager manager = s_memoryCacheManager;
if (manager != null)
{
manager.UpdateCacheSize(this._cacheSizeSamples[this._idx], this._memoryCache);
}
}
if (this._memoryLimit <= 0L)
{
return(0);
}
long num2 = this._cacheSizeSamples[this._idx];
if (num2 > this._memoryLimit)
{
num2 = this._memoryLimit;
}
return((int)((num2 * 100L) / this._memoryLimit));
}
protected override int GetCurrentPressure()
{
// Call GetUpdatedTotalCacheSize to update the total
// cache size, if there has been a recent Gen 2 Collection.
// This update must happen, otherwise the CacheManager won't
// know the total cache size.
int gen2Count = GC.CollectionCount(2);
SRefMultiple sref = _sizedRefMultiple;
if (gen2Count != _gen2Count && sref != null)
{
// update _gen2Count
_gen2Count = gen2Count;
// the SizedRef is only updated after a Gen2 Collection
// increment the index (it's either 1 or 0)
Dbg.Assert(SAMPLE_COUNT == 2);
_idx = _idx ^ 1;
// remember the sample time
_cacheSizeSampleTimes[_idx] = DateTime.UtcNow;
// remember the sample value
_cacheSizeSamples[_idx] = sref.ApproximateSize;
#if DBG
Dbg.Trace("MemoryCacheStats", "SizedRef.ApproximateSize=" + _cacheSizeSamples[_idx]);
#endif
IMemoryCacheManager memoryCacheManager = s_memoryCacheManager;
if (memoryCacheManager != null)
{
memoryCacheManager.UpdateCacheSize(_cacheSizeSamples[_idx], _memoryCache);
}
}
// if there's no memory limit, then there's nothing more to do
if (_memoryLimit <= 0)
{
return(0);
}
long cacheSize = _cacheSizeSamples[_idx];
// use _memoryLimit as an upper bound so that pressure is a percentage (between 0 and 100, inclusive).
if (cacheSize > _memoryLimit)
{
cacheSize = _memoryLimit;
}
// PerfCounter: Cache Percentage Process Memory Limit Used
// = memory used by this process / process memory limit at pressureHigh
// Set private bytes used in kilobytes because the counter is a DWORD
//
int result = (int)(cacheSize * 100 / _memoryLimit);
return(result);
}
