sammccall created this revision.
sammccall added a reviewer: adamcz.
Herald added subscribers: usaxena95, kadircet, arphaman, javed.absar.
Herald added a project: All.
sammccall requested review of this revision.
Herald added subscribers: cfe-commits, MaskRay, ilya-biryukov.
Herald added a project: clang-tools-extra.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D123672
Files:
clang-tools-extra/clangd/Preamble.cpp
clang-tools-extra/clangd/Preamble.h
clang-tools-extra/clangd/TUScheduler.cpp
Index: clang-tools-extra/clangd/TUScheduler.cpp
===================================================================
--- clang-tools-extra/clangd/TUScheduler.cpp
+++ clang-tools-extra/clangd/TUScheduler.cpp
@@ -110,6 +110,11 @@
constexpr trace::Metric PreambleBuildFilesystemLatencyRatio(
"preamble_fs_latency_ratio", trace::Metric::Distribution, "build_type");
+constexpr trace::Metric PreambleBuildSize("preamble_build_size",
+ trace::Metric::Distribution);
+constexpr trace::Metric PreambleSerializedSize("preamble_serialized_size",
+ trace::Metric::Distribution);
+
void reportPreambleBuild(const PreambleBuildStats &Stats,
bool IsFirstPreamble) {
auto RecordWithLabel = [&Stats](llvm::StringRef Label) {
@@ -122,6 +127,9 @@
static llvm::once_flag OnceFlag;
llvm::call_once(OnceFlag, [&] { RecordWithLabel("first_build"); });
RecordWithLabel(IsFirstPreamble ? "first_build_for_file" : "rebuild");
+
+ PreambleBuildSize.record(Stats.BuildSize);
+ PreambleSerializedSize.record(Stats.SerializedSize);
}
class ASTWorker;
Index: clang-tools-extra/clangd/Preamble.h
===================================================================
--- clang-tools-extra/clangd/Preamble.h
+++ clang-tools-extra/clangd/Preamble.h
@@ -83,6 +83,14 @@
double TotalBuildTime;
/// Time spent in filesystem operations during the build, in seconds.
double FileSystemTime;
+
+ /// Estimate of the memory used while building the preamble.
+ /// This memory has been released when buildPreamble returns.
+ /// For example, this includes the size of the in-memory AST (ASTContext).
+ size_t BuildSize;
+ /// The serialized size of the preamble.
+ /// This storage is needed while the preamble is used (but may be on disk).
+ size_t SerializedSize;
};
/// Build a preamble for the new inputs unless an old one can be reused.
Index: clang-tools-extra/clangd/Preamble.cpp
===================================================================
--- clang-tools-extra/clangd/Preamble.cpp
+++ clang-tools-extra/clangd/Preamble.cpp
@@ -64,8 +64,9 @@
class CppFilePreambleCallbacks : public PreambleCallbacks {
public:
- CppFilePreambleCallbacks(PathRef File, PreambleParsedCallback ParsedCallback)
- : File(File), ParsedCallback(ParsedCallback) {}
+ CppFilePreambleCallbacks(PathRef File, PreambleParsedCallback ParsedCallback,
+ PreambleBuildStats *Stats)
+ : File(File), ParsedCallback(ParsedCallback), Stats(Stats) {}
IncludeStructure takeIncludes() { return std::move(Includes); }
@@ -88,6 +89,25 @@
IsMainFileIncludeGuarded =
CI.getPreprocessor().getHeaderSearchInfo().isFileMultipleIncludeGuarded(
MainFE);
+
+ if (Stats) {
+ const ASTContext &AST = CI.getASTContext();
+ Stats->BuildSize = AST.getASTAllocatedMemory();
+ Stats->BuildSize += AST.getSideTableAllocatedMemory();
+ Stats->BuildSize += AST.Idents.getAllocator().getTotalMemory();
+ Stats->BuildSize += AST.Selectors.getTotalMemory();
+
+ Stats->BuildSize += AST.getSourceManager().getContentCacheSize();
+ Stats->BuildSize += AST.getSourceManager().getDataStructureSizes();
+ Stats->BuildSize +=
+ AST.getSourceManager().getMemoryBufferSizes().malloc_bytes;
+
+ const Preprocessor &PP = CI.getPreprocessor();
+ Stats->BuildSize += PP.getTotalMemory();
+ if (PreprocessingRecord *PRec = PP.getPreprocessingRecord())
+ Stats->BuildSize += PRec->getTotalMemory();
+ Stats->BuildSize += PP.getHeaderSearchInfo().getTotalMemory();
+ }
}
void BeforeExecute(CompilerInstance &CI) override {
@@ -135,6 +155,7 @@
std::unique_ptr<CommentHandler> IWYUHandler = nullptr;
const clang::LangOptions *LangOpts = nullptr;
const SourceManager *SourceMgr = nullptr;
+ PreambleBuildStats *Stats;
};
// Represents directives other than includes, where basic textual information is
@@ -456,7 +477,7 @@
// to read back. We rely on dynamic index for the comments instead.
CI.getPreprocessorOpts().WriteCommentListToPCH = false;
- CppFilePreambleCallbacks CapturedInfo(FileName, PreambleCallback);
+ CppFilePreambleCallbacks CapturedInfo(FileName, PreambleCallback, Stats);
auto VFS = Inputs.TFS->view(Inputs.CompileCommand.Directory);
llvm::SmallString<32> AbsFileName(FileName);
VFS->makeAbsolute(AbsFileName);
@@ -476,6 +497,12 @@
// bodies.
CI.getFrontendOpts().SkipFunctionBodies = false;
+ if (Stats != nullptr) {
+ Stats->TotalBuildTime = PreambleTimer.getTime();
+ Stats->FileSystemTime = TimedFS->getTime();
+ Stats->SerializedSize = BuiltPreamble ? BuiltPreamble->getSize() : 0;
+ }
+
if (BuiltPreamble) {
vlog("Built preamble of size {0} for file {1} version {2} in {3} seconds",
BuiltPreamble->getSize(), FileName, Inputs.Version,
@@ -491,10 +518,6 @@
Result->CanonIncludes = CapturedInfo.takeCanonicalIncludes();
Result->StatCache = std::move(StatCache);
Result->MainIsIncludeGuarded = CapturedInfo.isMainFileIncludeGuarded();
- if (Stats != nullptr) {
- Stats->TotalBuildTime = PreambleTimer.getTime();
- Stats->FileSystemTime = TimedFS->getTime();
- }
return Result;
}
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