From 913db30a72a000b31d1e8620cb9b5d8e02d5b6f1 Mon Sep 17 00:00:00 2001 From: Christian Legnitto Date: Wed, 26 Mar 2025 09:56:33 -0400 Subject: [PATCH] Use a relative error Hardcoded one drifts when floats are large. Fixes https://github.com/Rust-GPU/rust-gpu.github.io/issues/73. --- blog/2024-11-25-optimizing-matmul/code/bin/blog/src/bin.rs | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/blog/2024-11-25-optimizing-matmul/code/bin/blog/src/bin.rs b/blog/2024-11-25-optimizing-matmul/code/bin/blog/src/bin.rs index f12bcb2..2ddfd1f 100644 --- a/blog/2024-11-25-optimizing-matmul/code/bin/blog/src/bin.rs +++ b/blog/2024-11-25-optimizing-matmul/code/bin/blog/src/bin.rs @@ -183,8 +183,9 @@ fn verify_results(a: &[f32], b: &[f32], result: &[f32], m: u32, k: u32, n: u32) } let actual = result[(i * n + j) as usize]; let diff = (actual - expected).abs(); + let rel_error = diff / expected.abs(); assert!( - diff < 1e-3, + rel_error < 1e-3, "Mismatch at [{}, {}]: expected {}, got {}", i, j,