Added fill bench

candle-core/benches/fill.rs

@@ -0,0 +1,57 @@
+use candle_core::{DType, Device, Tensor};
+use criterion::{black_box, criterion_group, criterion_main, Criterion, Throughput};
+use std::time::Instant;
+
+fn run(shape: (usize, usize, usize), dtype: DType, device: &Device) {
+    Tensor::ones(shape, dtype, device).unwrap();
+}
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let b = 1;
+    let rows = 4096;
+    let columns = 4096;
+
+    let flops = b * rows * columns;
+
+    let device1 = Device::new_metal(0).unwrap();
+    let device2 = device1.clone();
+
+    let mut group = c.benchmark_group("fill_metal_u8");
+    group.throughput(Throughput::Bytes(flops as u64));
+    group.bench_function("iter", move |bencher| {
+        bencher.iter_custom(|iters| {
+            let start = Instant::now();
+            for _i in 0..iters {
+                run(black_box((b, rows, columns)), black_box(DType::U8), black_box(&device1));
+            }
+            if let Device::Metal(device) = &device1 {
+                device.wait_until_completed().unwrap();
+            } else {
+                panic!("Expected metal device");
+            }
+            start.elapsed()
+        })
+    });
+    group.finish();
+
+    let mut group = c.benchmark_group("fill_metal_f32");
+    group.throughput(Throughput::Bytes((flops * DType::F32.size_in_bytes()) as u64));
+    group.bench_function("iter", move |bencher| {
+        bencher.iter_custom(|iters| {
+            let start = Instant::now();
+            for _i in 0..iters {
+                run(black_box((b, rows, columns)), black_box(DType::F32), black_box(&device2));
+            }
+            if let Device::Metal(device) = &device2 {
+                device.wait_until_completed().unwrap();
+            } else {
+                panic!("Expected metal device");
+            }
+            start.elapsed()
+        })
+    });
+    group.finish();
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);