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* Keep some statistics about memory allocation.

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This commit is contained in:
Eelco Dolstra 2006-05-04 08:32:30 +00:00
parent b803fb95cb
commit 6980544467
1 changed files with 16 additions and 5 deletions
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21
table/aterm-map.cc
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@ -65,6 +65,13 @@ private:
}; };
static const unsigned int maxLoadFactor = /* 1 / */ 3;
static unsigned int nrResizes = 0;
static unsigned int sizeTotalAlloc = 0;
static unsigned int sizeCurAlloc = 0;
static unsigned int sizeMaxAlloc = 0;
ATermMap::ATermMap(unsigned int expectedCount) ATermMap::ATermMap(unsigned int expectedCount)
{ {
init(expectedCount * 10 / 9); /* slight adjustment */ init(expectedCount * 10 / 9); /* slight adjustment */
@ -110,6 +117,7 @@ void ATermMap::free()
if (hashTable) { if (hashTable) {
ATunprotectArray((ATerm *) hashTable); ATunprotectArray((ATerm *) hashTable);
::free(hashTable); ::free(hashTable);
sizeCurAlloc -= sizeof(KeyValue) * capacity;
hashTable = 0; hashTable = 0;
} }
} }
@ -124,10 +132,6 @@ static unsigned int roundToPowerOf2(unsigned int x)
} }
static const unsigned int maxLoadFactor = /* 1 / */ 3;
static unsigned int nrResizes = 0;
void ATermMap::resizeTable(unsigned int expectedCount) void ATermMap::resizeTable(unsigned int expectedCount)
{ {
if (expectedCount == 0) expectedCount = 1; if (expectedCount == 0) expectedCount = 1;
@ -141,6 +145,9 @@ void ATermMap::resizeTable(unsigned int expectedCount)
maxCount = expectedCount; maxCount = expectedCount;
capacity = roundToPowerOf2(maxCount * maxLoadFactor); capacity = roundToPowerOf2(maxCount * maxLoadFactor);
hashTable = (KeyValue *) calloc(sizeof(KeyValue), capacity); hashTable = (KeyValue *) calloc(sizeof(KeyValue), capacity);
sizeTotalAlloc += sizeof(KeyValue) * capacity;
sizeCurAlloc += sizeof(KeyValue) * capacity;
if (sizeCurAlloc > sizeMaxAlloc) sizeMaxAlloc = sizeCurAlloc;
ATprotectArray((ATerm *) hashTable, capacity * 2); ATprotectArray((ATerm *) hashTable, capacity * 2);
// cout << capacity << endl; // cout << capacity << endl;
@ -151,6 +158,7 @@ void ATermMap::resizeTable(unsigned int expectedCount)
copy(oldHashTable, oldCapacity); copy(oldHashTable, oldCapacity);
ATunprotectArray((ATerm *) oldHashTable); ATunprotectArray((ATerm *) oldHashTable);
::free(oldHashTable); ::free(oldHashTable);
sizeCurAlloc -= sizeof(KeyValue) * oldCapacity;
nrResizes++; nrResizes++;
} }
} }
@ -325,7 +333,10 @@ int main(int argc, char * * argv)
map.get(someTerm()); map.get(someTerm());
} }
cout << "RESIZES: " << nrResizes << endl; cout << "RESIZES: " << nrResizes << " "
<< sizeTotalAlloc << " "
<< sizeCurAlloc << " "
<< sizeMaxAlloc << endl;
cout << "SET: " cout << "SET: "
<< nrItemsSet << " " << nrItemsSet << " "