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authorDavid Kalnischkies <david@kalnischkies.de>2015-07-13 16:28:21 +0200
committerDavid Kalnischkies <david@kalnischkies.de>2015-08-10 17:27:18 +0200
commit71c9e95b223517b5f51c4627f6ad4cce8af0d901 (patch)
treeb10de544871f4d7c2d58cd202d310072f85444be /cmdline
parentfd23676e809b7fa87ae138cc22d2c683d212950e (diff)
split-up Dependency struct
Having dependency data separated from the link between version/package and the dependency allows use to work on sharing the depdency data a bit as it turns out that many dependencies are in fact duplicates. How many are duplicates various heavily with the sources configured, but for a single Debian release the ballpark is 2 duplicates for each dependency already (e.g. libc6 counts 18410 dependencies, but only 45 unique). Add more releases and the duplicates count only rises to get ~6 for 3 releases. For each architecture a user has configured which given the shear number of dependencies amounts to MBs of duplication. We can cut down on this number, but pay a heavy price for it: In my many releases(3) + architectures(3) test we have a 10% (~ 0.5 sec) increase in cache creationtime, but also 10% less cachesize (~ 10 MB). Further work is needed to rip the whole benefits from this through, so this is just the start. Git-Dch: Ignore
Diffstat (limited to 'cmdline')
-rw-r--r--cmdline/apt-cache.cc9
1 files changed, 5 insertions, 4 deletions
diff --git a/cmdline/apt-cache.cc b/cmdline/apt-cache.cc
index 9c884433c..cfa789fd9 100644
--- a/cmdline/apt-cache.cc
+++ b/cmdline/apt-cache.cc
@@ -364,14 +364,14 @@ static bool Stats(CommandLine &)
cout << _(" Single virtual packages: ") << DVirt << endl;
cout << _(" Mixed virtual packages: ") << NVirt << endl;
cout << _(" Missing: ") << Missing << endl;
-
+
cout << _("Total distinct versions: ") << Cache->Head().VersionCount << " (" <<
SizeToStr(Cache->Head().VersionCount*Cache->Head().VersionSz) << ')' << endl;
cout << _("Total distinct descriptions: ") << Cache->Head().DescriptionCount << " (" <<
SizeToStr(Cache->Head().DescriptionCount*Cache->Head().DescriptionSz) << ')' << endl;
- cout << _("Total dependencies: ") << Cache->Head().DependsCount << " (" <<
- SizeToStr(Cache->Head().DependsCount*Cache->Head().DependencySz) << ')' << endl;
-
+ cout << _("Total dependencies: ") << Cache->Head().DependsCount << "/" << Cache->Head().DependsDataCount << " (" <<
+ SizeToStr((Cache->Head().DependsCount*Cache->Head().DependencySz) +
+ (Cache->Head().DependsDataCount*Cache->Head().DependencyDataSz)) << ')' << endl;
cout << _("Total ver/file relations: ") << Cache->Head().VerFileCount << " (" <<
SizeToStr(Cache->Head().VerFileCount*Cache->Head().VerFileSz) << ')' << endl;
cout << _("Total Desc/File relations: ") << Cache->Head().DescFileCount << " (" <<
@@ -450,6 +450,7 @@ static bool Stats(CommandLine &)
APT_CACHESIZE(VersionCount, VersionSz) +
APT_CACHESIZE(DescriptionCount, DescriptionSz) +
APT_CACHESIZE(DependsCount, DependencySz) +
+ APT_CACHESIZE(DependsDataCount, DependencyDataSz) +
APT_CACHESIZE(ReleaseFileCount, ReleaseFileSz) +
APT_CACHESIZE(PackageFileCount, PackageFileSz) +
APT_CACHESIZE(VerFileCount, VerFileSz) +