From dc8cf050994fe431498f24566f1ddb366613de43 Mon Sep 17 00:00:00 2001
From: Xiaochun Tong <xtong@uwaterloo.ca>
Date: Wed, 22 Nov 2023 14:46:06 -0500
Subject: [PATCH] update submod

---
 luisa_compute/examples/vecadd.rs | 23 +++++++++++++++++++----
 luisa_compute_sys/LuisaCompute   |  2 +-
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/luisa_compute/examples/vecadd.rs b/luisa_compute/examples/vecadd.rs
index 39ed0bf..5c1b675 100644
--- a/luisa_compute/examples/vecadd.rs
+++ b/luisa_compute/examples/vecadd.rs
@@ -1,9 +1,9 @@
 use luisa::prelude::*;
 use luisa_compute as luisa;
 use std::env::current_exe;
-#[tracked]
+
 fn main() {
-    luisa::init_logger();
+    luisa::init_logger_verbose();
     let args: Vec<String> = std::env::args().collect();
     assert!(
         args.len() <= 2,
@@ -29,7 +29,7 @@ fn main() {
             name: Some("vecadd".into()),
             ..Default::default()
         },
-        &|buf_z| {
+        &track!(|buf_z| {
             // z is pass by arg
             let buf_x = &x; // x and y are captured
             let buf_y = &y;
@@ -39,9 +39,24 @@ fn main() {
             let vx = 2.0_f32.var(); // create a local mutable variable
             *vx += x; // store to vx
             buf_z.write(tid, vx + y);
-        },
+        }),
     );
     kernel.dispatch([1024, 1, 1], &z);
     let z_data = z.view(..).copy_to_vec();
     println!("{:?}", &z_data[0..16]);
+    {
+        let s = device.default_stream();
+        let t = std::time::Instant::now();
+        let times = 1000;
+        let s = s.scope();
+        for _ in 0..times {
+           
+            s.submit_with_callback([], ||{
+                std::hint::black_box(());
+            });
+            s.synchronize();
+        }
+        let elapsed = t.elapsed().as_micros();
+        println!("{} us", elapsed as f32 / times as f32);
+    }
 }
diff --git a/luisa_compute_sys/LuisaCompute b/luisa_compute_sys/LuisaCompute
index ea04b92..b81ab1b 160000
--- a/luisa_compute_sys/LuisaCompute
+++ b/luisa_compute_sys/LuisaCompute
@@ -1 +1 @@
-Subproject commit ea04b924b4686850d1100358685ee592744c7163
+Subproject commit b81ab1b10ba323622f3540bd5d313318e5f7fb4a