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|
open Eio.Std
(* A publisher keeps updating a counter and signalling a condition.
Two consumers read the counter whenever they get a signal.
The producer stops after signalling [target], and the consumers stop after seeing it. *)
let n_iters = 100
let target = 100000
let run_publisher cond v =
for i = 1 to target do
Atomic.set v i;
(* traceln "set %d" i; *)
Eio.Condition.broadcast cond
done
let run_consumer cond v =
try
while true do
Fiber.both
(fun () -> Eio.Condition.await_no_mutex cond)
(fun () ->
let current = Atomic.get v in
(* traceln "saw %d" current; *)
if current = target then raise Exit
)
done
with Exit -> ()
let run_bench ?domain_mgr ~clock () =
let cond = Eio.Condition.create () in
let v = Atomic.make 0 in
let run_consumer () =
match domain_mgr with
| Some dm -> Eio.Domain_manager.run dm (fun () -> run_consumer cond v)
| None -> run_consumer cond v
in
let name str =
match domain_mgr with
| Some _ -> str ^ "_domain"
| None -> str
in
Gc.full_major ();
let t0 = Eio.Time.now clock in
for _ = 1 to n_iters do
Fiber.all [
run_consumer;
run_consumer;
(fun () -> run_publisher cond v);
];
done;
let t1 = Eio.Time.now clock in
let time_total = t1 -. t0 in
let time_per_iter = time_total /. float n_iters in
Metric.create (name "broadcast") (`Float (1e3 *. time_per_iter)) "ms" "Time to signal a new value"
let main ~domain_mgr ~clock = [
run_bench ~clock ();
run_bench ~domain_mgr ~clock ();
]
let run env =
main
~domain_mgr:(Eio.Stdenv.domain_mgr env)
~clock:(Eio.Stdenv.clock env)
|
