In flambda, no inlining-report is generated

Ecosystem
,
1

So this is probably a dummy question, but I’m currently trying to investigate a bizarre performance issue while using the flambda compiler, and I have added -inlining-report to ocamlopt_flags in my dune build file (see monad_perf_bench/bin/dune at master · haoxuany/monad_perf_bench · GitHub). However, I don’t see any files generated for this. Has the documentation for dune or flambda since changed or is there something obvious that I have missed?

Thank you!

2

Look into _build/default/. Subdirectories like .something.objs/native/ do contain .0.inlining.org files when I add the option.

3

Ah actually you’re right, I forgot that tree hides dot files by default. Thank you!

Hm, would you happen to have specific build steps or compiler setup for this? Since this is what happens when I do a build:

$ cat bin/dune
(env (dev (flags (:standard -warn-error -A))))

(executable
 (public_name monad_perf_bench)
 (name main)
 (ocamlopt_flags (:standard -O3 -inlining-report -rounds 7 -unbox-closures
                   ; -dflambda-verbose
 ))
 (libraries core_bench core_unix.command_unix iter)
)
$ dune clean
$ dune build
$ tree
.
├── Makefile
├── README.md
├── _build
│   ├── default
│   │   ├── META.monad_perf_bench
│   │   ├── README.md
│   │   ├── bin
│   │   │   ├── main.exe
│   │   │   ├── main.ml
│   │   │   ├── main.mli
│   │   │   ├── monad_cont.ml
│   │   │   ├── monad_prod.ml
│   │   │   └── monad_sig.ml
│   │   ├── monad_perf_bench.dune-package
│   │   ├── monad_perf_bench.install
│   │   └── monad_perf_bench.opam
│   ├── install
│   │   └── default
│   │       ├── bin
│   │       │   └── monad_perf_bench -> ../../../default/bin/main.exe
│   │       ├── doc
│   │       │   └── monad_perf_bench
│   │       │       └── README.md -> ../../../../default/README.md
│   │       └── lib
│   │           └── monad_perf_bench
│   │               ├── META -> ../../../../default/META.monad_perf_bench
│   │               ├── dune-package -> ../../../../default/monad_perf_bench.dune-package
│   │               └── opam -> ../../../../default/monad_perf_bench.opam
│   └── log
├── bin
│   ├── dune
│   ├── main.ml
│   ├── monad_cont.ml
│   ├── monad_cont.ml~
│   ├── monad_prod.ml
│   ├── monad_prod.ml~
│   ├── monad_sig.ml
│   └── monad_sig.ml~
├── dune-project
└── monad_perf_bench.opam

11 directories, 29 files
4

What happens if you do find _build | grep inlining ?