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-rw-r--r--cmdline/apt-cache.cc70
1 files changed, 61 insertions, 9 deletions
diff --git a/cmdline/apt-cache.cc b/cmdline/apt-cache.cc
index ac0d48a36..1447feb81 100644
--- a/cmdline/apt-cache.cc
+++ b/cmdline/apt-cache.cc
@@ -264,6 +264,46 @@ static bool DumpPackage(CommandLine &CmdL)
return true;
}
/*}}}*/
+// ShowHashTableStats - Show stats about a hashtable /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+template<class T>
+static void ShowHashTableStats(std::string Type,
+ T *StartP,
+ map_pointer_t *Hashtable,
+ unsigned long Size)
+{
+ // 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 + P->Next)
+ ++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;
+}
+ /*}}}*/
// Stats - Dump some nice statistics /*{{{*/
// ---------------------------------------------------------------------
/* */
@@ -360,20 +400,32 @@ static bool Stats(CommandLine &)
}
}
cout << _("Total dependency version space: ") << SizeToStr(DepVerSize) << endl;
-
+
unsigned long Slack = 0;
for (int I = 0; I != 7; I++)
Slack += Cache->Head().Pools[I].ItemSize*Cache->Head().Pools[I].Count;
cout << _("Total slack space: ") << SizeToStr(Slack) << endl;
-
+
unsigned long Total = 0;
- Total = Slack + Size + Cache->Head().DependsCount*Cache->Head().DependencySz +
- Cache->Head().VersionCount*Cache->Head().VersionSz +
- Cache->Head().PackageCount*Cache->Head().PackageSz +
- Cache->Head().VerFileCount*Cache->Head().VerFileSz +
- Cache->Head().ProvidesCount*Cache->Head().ProvidesSz;
+#define APT_CACHESIZE(X,Y) (Cache->Head().X * Cache->Head().Y)
+ Total = Slack + Size +
+ APT_CACHESIZE(GroupCount, GroupSz) +
+ APT_CACHESIZE(PackageCount, PackageSz) +
+ APT_CACHESIZE(VersionCount, VersionSz) +
+ APT_CACHESIZE(DescriptionCount, DescriptionSz) +
+ APT_CACHESIZE(DependsCount, DependencySz) +
+ APT_CACHESIZE(PackageFileCount, PackageFileSz) +
+ APT_CACHESIZE(VerFileCount, VerFileSz) +
+ APT_CACHESIZE(DescFileCount, DescFileSz) +
+ APT_CACHESIZE(ProvidesCount, ProvidesSz) +
+ (2 * Cache->Head().HashTableSize * sizeof(map_id_t));
cout << _("Total space accounted for: ") << SizeToStr(Total) << endl;
-
+#undef APT_CACHESIZE
+
+ // hashtable stats
+ ShowHashTableStats<pkgCache::Package>("PkgHashTable", Cache->PkgP, Cache->Head().PkgHashTable(), Cache->Head().HashTableSize);
+ ShowHashTableStats<pkgCache::Group>("GrpHashTable", Cache->GrpP, Cache->Head().GrpHashTable(), Cache->Head().HashTableSize);
+
return true;
}
/*}}}*/
@@ -1231,7 +1283,7 @@ static bool DisplayRecord(pkgCacheFile &CacheFile, pkgCache::VerIterator V)
struct ExDescFile
{
pkgCache::DescFile *Df;
- map_ptrloc ID;
+ map_id_t ID;
};
// Search - Perform a search /*{{{*/