go - Fork of Go programming language with my patches.

Age	Commit message (Collapse)	Author
2024-03-27	cmd/compile,cmd/preprofile: move logic to shared common package	Michael Pratt
	The processing performed in cmd/preprofile is a simple version of the same initial processing performed by cmd/compile/internal/pgo. Refactor this processing into the new IR-independent cmd/internal/pgo package. Now cmd/preprofile and cmd/compile run the same code for initial processing of a pprof profile, guaranteeing that they always stay in sync. Since it is now trivial, this CL makes one change to the serialization format: the entries are ordered by weight. This allows us to avoid sorting ByWeight on deserialization. Impact on PGO parsing when compiling cmd/compile with PGO: * Without preprocessing: PGO parsing ~13.7% of CPU time * With preprocessing (unsorted): ~2.9% of CPU time (sorting ~1.7%) * With preprocessing (sorted): ~1.3% of CPU time The remaining 1.3% of CPU time approximately breaks down as: * ~0.5% parsing the preprocessed profile * ~0.7% building weighted IR call graph * ~0.5% walking function IR to find direct calls * ~0.2% performing lookups for indirect calls targets For #58102. Change-Id: Iaba425ea30b063ca195fb2f7b29342961c8a64c2 Reviewed-on: https://go-review.googlesource.com/c/go/+/569337 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Auto-Submit: Michael Pratt <mpratt@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-02-15	cmd/compile: update the incorrect assignment of call site offset.	Jin Lin
	The call site calculation in the previous version is incorrect. For the PGO preprocess file, the compiler should directly use the call site offset value. Additionly, this change refactors the preprocess tool to clean up unused fields including startline, the flat and the cum. Change-Id: I7bffed3215d4c016d9a9e4034bfd373bf50ab43f Reviewed-on: https://go-review.googlesource.com/c/go/+/562795 Reviewed-by: Cherry Mui <cherryyz@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Pratt <mpratt@google.com>