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Move path info caching from BinaryCacheStore to Store

Browse source 
Caching path info is generally useful. For instance, it speeds up "nix
path-info -rS /run/current-system" (i.e. showing the closure sizes of
all paths in the closure of the current system) from 5.6s to 0.15s.

This also eliminates some APIs like Store::queryDeriver() and
Store::queryReferences().
This commit is contained in:
Eelco Dolstra 2016-04-19 18:50:15 +02:00
parent 608b0265e1
commit e0204f8d46
21 changed files with 318 additions and 353 deletions
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43
src/nix-store/nix-store.cc
View file

@ -51,7 +51,7 @@ ref<LocalStore> ensureLocalStore()
static Path useDeriver(Path path)
{
if (isDerivation(path)) return path;
Path drvPath = store->queryDeriver(path);
Path drvPath = store->queryPathInfo(path)->deriver;
if (drvPath == "")
throw Error(format("deriver of path ‘%1%’ is not known") % path);
return drvPath;
@ -247,8 +247,7 @@ static void printTree(const Path & path,
cout << format("%1%%2%\n") % firstPad % path;
PathSet references;
store->queryReferences(path, references);
auto references = store->queryPathInfo(path)->references;
/* Topologically sort under the relation A < B iff A \in
closure(B). That is, if derivation A is an (possibly indirect)
@ -335,7 +334,10 @@ static void opQuery(Strings opFlags, Strings opArgs)
PathSet ps = maybeUseOutputs(followLinksToStorePath(i), useOutput, forceRealise);
for (auto & j : ps) {
if (query == qRequisites) store->computeFSClosure(j, paths, false, includeOutputs);
else if (query == qReferences) store->queryReferences(j, paths);
else if (query == qReferences) {
for (auto & p : store->queryPathInfo(j)->references)
paths.insert(p);
}
else if (query == qReferrers) store->queryReferrers(j, paths);
else if (query == qReferrersClosure) store->computeFSClosure(j, paths, true);
}
@ -349,7 +351,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
case qDeriver:
for (auto & i : opArgs) {
Path deriver = store->queryDeriver(followLinksToStorePath(i));
Path deriver = store->queryPathInfo(followLinksToStorePath(i))->deriver;
cout << format("%1%\n") %
(deriver == "" ? "unknown-deriver" : deriver);
}
@ -372,12 +374,12 @@ static void opQuery(Strings opFlags, Strings opArgs)
for (auto & i : opArgs) {
PathSet paths = maybeUseOutputs(followLinksToStorePath(i), useOutput, forceRealise);
for (auto & j : paths) {
ValidPathInfo info = store->queryPathInfo(j);
auto info = store->queryPathInfo(j);
if (query == qHash) {
assert(info.narHash.type == htSHA256);
cout << format("sha256:%1%\n") % printHash32(info.narHash);
assert(info->narHash.type == htSHA256);
cout << format("sha256:%1%\n") % printHash32(info->narHash);
} else if (query == qSize)
cout << format("%1%\n") % info.narSize;
cout << format("%1%\n") % info->narSize;
}
}
break;
@ -782,14 +784,14 @@ static void opVerifyPath(Strings opFlags, Strings opArgs)
for (auto & i : opArgs) {
Path path = followLinksToStorePath(i);
printMsg(lvlTalkative, format("checking path ‘%1%’...") % path);
ValidPathInfo info = store->queryPathInfo(path);
HashSink sink(info.narHash.type);
auto info = store->queryPathInfo(path);
HashSink sink(info->narHash.type);
store->narFromPath(path, sink);
auto current = sink.finish();
if (current.first != info.narHash) {
if (current.first != info->narHash) {
printMsg(lvlError,
format("path ‘%1%’ was modified! expected hash ‘%2%’, got ‘%3%’")
% path % printHash(info.narHash) % printHash(current.first));
% path % printHash(info->narHash) % printHash(current.first));
status = 1;
}
}
@ -901,13 +903,14 @@ static void opServe(Strings opFlags, Strings opArgs)
PathSet paths = readStorePaths<PathSet>(in);
// !!! Maybe we want a queryPathInfos?
for (auto & i : paths) {
if (!store->isValidPath(i))
continue;
ValidPathInfo info = store->queryPathInfo(i);
out << info.path << info.deriver << info.references;
// !!! Maybe we want compression?
out << info.narSize // downloadSize
<< info.narSize;
try {
auto info = store->queryPathInfo(i);
out << info->path << info->deriver << info->references;
// !!! Maybe we want compression?
out << info->narSize // downloadSize
<< info->narSize;
} catch (InvalidPath &) {
}
}
out << "";
break;