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|
(* TEST
include unix;
hasunix;
{
bytecode;
}{
native;
}
*)
let try_ext cmd =
let ic, oc, iec = Unix.open_process_full cmd (Unix.environment ()) in
let n = try Some (input_line ic |> int_of_string) with _ -> None in
match Unix.close_process_full (ic, oc, iec) with
| Unix.WEXITED 0 -> n
| _ -> None
(* Try to guess the number of cpus via an external method. If we
can't, assume it passed since we have nothing to compare against *)
let _ =
List.iter (fun cmd ->
match try_ext cmd with
| None -> ()
| Some n ->
let recommended_domain_count =
Domain.recommended_domain_count () in
if recommended_domain_count > n then
failwith
(Printf.sprintf
"external tool %s says n=%d, recommended domain says=%d\n"
cmd n recommended_domain_count))
["nproc"; "sysctl -n hw.ncpu"];
print_string "passed\n"
|
