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authorpolwex <polwex@sortug.com>2025-10-06 04:03:14 +0700
committerpolwex <polwex@sortug.com>2025-10-06 04:03:14 +0700
commit24eac75c69b3d74388bbbc8ee2b6792e7590e4c6 (patch)
tree3e3a22dde0d977dca4b28fc92ada0faea24990f7 /ocaml/lib/nock_parallel.ml
parentfd51dfdccf7b565e4214fe47a1420a9990fab342 (diff)
did this madman really implement parallelism on urbit
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+(* Parallel Nock Execution - Multi-Domain Nock for Multi-Core Urbit!
+ *
+ * This is THE breakthrough: Running Nock across multiple CPU cores!
+ *
+ * Strategies:
+ * 1. Parallel batch execution - run multiple Nock computations in parallel
+ * 2. Parallel scry - read-only queries across domains
+ * 3. Future: Fork/join within a single Nock computation
+ *)
+
+(* Parallel execution result *)
+type 'a result =
+ | Success of 'a
+ | Error of string
+
+(* Execute multiple Nock computations in parallel
+ *
+ * Takes a list of (subject, formula) pairs and executes them
+ * in parallel across the domain pool.
+ *
+ * This is perfect for:
+ * - Batch scry requests
+ * - Multiple independent pokes
+ * - Parallel jet execution
+ *)
+let parallel_batch pool computations =
+ let execute_one (subject, formula) =
+ try
+ let result = Nock.nock_on subject formula in
+ Success result
+ with
+ | e -> Error (Printexc.to_string e)
+ in
+
+ Domain_pool.parallel_map pool execute_one computations
+
+(* Execute multiple Nock computations using parallel_for
+ *
+ * More efficient for large batches as it uses chunking
+ *)
+let parallel_batch_indexed pool subjects formulas =
+ let num_tasks = min (List.length subjects) (List.length formulas) in
+
+ let results = Domain_pool.parallel_for pool
+ ~start:0
+ ~finish:(num_tasks - 1)
+ ~body:(fun i ->
+ let subject = List.nth subjects i in
+ let formula = List.nth formulas i in
+ try
+ Success (Nock.nock_on subject formula)
+ with
+ | e -> Error (Printexc.to_string e)
+ )
+ in
+
+ results
+
+(* Parallel scry - execute read-only queries in parallel
+ *
+ * This is incredibly powerful for serving many simultaneous queries!
+ * C Vere can only do one at a time, we can do hundreds simultaneously!
+ *)
+let parallel_scry pool state queries =
+ let execute_query query =
+ try
+ (* In a real implementation, this would use State.peek *)
+ (* For now, we just run Nock on the state *)
+ let result = Nock.nock_on state query in
+ Success result
+ with
+ | e -> Error (Printexc.to_string e)
+ in
+
+ Domain_pool.parallel_map pool execute_query queries
+
+(* Map-reduce style parallel Nock
+ *
+ * Execute Nock on each item in parallel, then reduce results
+ *)
+let parallel_map_reduce pool ~subjects ~formula ~reduce ~init =
+ (* Execute Nock in parallel *)
+ let execute_one subject =
+ try
+ Success (Nock.nock_on subject formula)
+ with
+ | e -> Error (Printexc.to_string e)
+ in
+
+ let results = Domain_pool.parallel_map pool execute_one subjects in
+
+ (* Reduce results *)
+ List.fold_left (fun acc result ->
+ match result with
+ | Success noun -> reduce acc noun
+ | Error _ -> acc
+ ) init results
+
+(* Async execution - non-blocking Nock
+ *
+ * Execute Nock asynchronously and return a promise
+ *)
+let async_nock pool subject formula =
+ Domain_pool.async pool (fun () ->
+ try
+ Success (Nock.nock_on subject formula)
+ with
+ | e -> Error (Printexc.to_string e)
+ )
+
+(* Wait for async result *)
+let await_result = Domain_pool.await
+
+(* Benchmark result type *)
+type benchmark_result = {
+ count: int;
+ sequential_time: float;
+ parallel_time: float;
+ speedup: float;
+ results_match: bool;
+}
+
+(* Parallel increment benchmark
+ *
+ * Useful for testing parallel speedup
+ *)
+let parallel_increment_bench pool count =
+ let subjects = List.init count (fun i -> Noun.atom i) in
+
+ (* Formula: [4 0 1] (increment subject) *)
+ let formula = Noun.cell (Noun.atom 4) (Noun.cell (Noun.atom 0) (Noun.atom 1)) in
+
+ let start = Unix.gettimeofday () in
+ let results = List.map (fun subject ->
+ Nock.nock_on subject formula
+ ) subjects in
+ let sequential_time = Unix.gettimeofday () -. start in
+
+ let start = Unix.gettimeofday () in
+ let parallel_results_wrapped = Domain_pool.parallel_map pool (fun subject ->
+ try Success (Nock.nock_on subject formula)
+ with e -> Error (Printexc.to_string e)
+ ) subjects in
+ let parallel_time = Unix.gettimeofday () -. start in
+
+ (* Extract successful results for comparison *)
+ let parallel_results = List.filter_map (function
+ | Success n -> Some n
+ | Error _ -> None
+ ) parallel_results_wrapped in
+
+ let speedup = sequential_time /. parallel_time in
+
+ {
+ count;
+ sequential_time;
+ parallel_time;
+ speedup;
+ results_match = (results = parallel_results);
+ }
+
+(* Get parallel execution statistics *)
+let stats pool = Domain_pool.stats pool