+// ShowHashTableStats - Show stats about a hashtable /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+static map_pointer_t PackageNext(pkgCache::Package const * const P) { return P->NextPackage; }
+static map_pointer_t GroupNext(pkgCache::Group const * const G) { return G->Next; }
+template<class T>
+static void ShowHashTableStats(std::string Type,
+ T *StartP,
+ map_pointer_t *Hashtable,
+ unsigned long Size,
+ map_pointer_t(*Next)(T const * const))
+{
+ // hashtable stats for the HashTable
+ unsigned long NumBuckets = Size;
+ unsigned long UsedBuckets = 0;
+ unsigned long UnusedBuckets = 0;
+ unsigned long LongestBucket = 0;
+ unsigned long ShortestBucket = NumBuckets;
+ unsigned long Entries = 0;
+ for (unsigned int i=0; i < NumBuckets; ++i)
+ {
+ T *P = StartP + Hashtable[i];
+ if(P == 0 || P == StartP)
+ {
+ ++UnusedBuckets;
+ continue;
+ }
+ ++UsedBuckets;
+ unsigned long ThisBucketSize = 0;
+ for (; P != StartP; P = StartP + Next(P))
+ ++ThisBucketSize;
+ Entries += ThisBucketSize;
+ LongestBucket = std::max(ThisBucketSize, LongestBucket);
+ ShortestBucket = std::min(ThisBucketSize, ShortestBucket);
+ }
+ cout << "Total buckets in " << Type << ": " << NumBuckets << std::endl;
+ cout << " Unused: " << UnusedBuckets << std::endl;
+ cout << " Used: " << UsedBuckets << std::endl;
+ cout << " Average entries: " << Entries/(double)NumBuckets << std::endl;
+ cout << " Longest: " << LongestBucket << std::endl;
+ cout << " Shortest: " << ShortestBucket << std::endl;
+}
+ /*}}}*/