From 7a70b439cdf1c76f420bf608bf9b55ab56ca53f9 Mon Sep 17 00:00:00 2001
From: Zepp <17007549+ZeppLu@users.noreply.github.com>
Date: Wed, 26 Feb 2025 16:15:37 +0800
Subject: [PATCH] doc: Use permanent link

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index ff45782..381adea 100644
--- a/README.md
+++ b/README.md
@@ -188,7 +188,7 @@ For certain shapes, block sizes aligned to powers of 2 can lead to underutilized
 #### FFMA SASS interleaving 🐳
 
 We observe a performance improvement in [the CUTLASS FP8 kernel](https://github.com/NVIDIA/cutlass/tree/main/examples/54_hopper_fp8_warp_specialized_gemm) between NVCC 12.2 and 12.3. By comparing the compiled SASS, we discover that one bit in [a series of `FADD` instructions](https://github.com/NVIDIA/cutlass/blob/eefa171318b79cbe2e78514d4cce5cd0fe919d0c/include/cutlass/gemm/collective/fp8_accumulation.hpp#L73) is flipped in an interleaving pattern.
-After referencing some open-source [CUDA assembler](https://github.com/cloudcores/CuAssembler/blob/master/CuAsm/CuControlCode.py#L46) implementations, we identified that this bit controls `yield`, which may enhance warp-level parallelism (just a guess, yielding the current warp and let other warps work).
+After referencing some open-source [CUDA assembler](https://github.com/cloudcores/CuAssembler/blob/96a9f72baf00f40b9b299653fcef8d3e2b4a3d49/CuAsm/CuControlCode.py#L46) implementations, we identified that this bit controls `yield`, which may enhance warp-level parallelism (just a guess, yielding the current warp and let other warps work).
 
 To leverage this, we develop [a similar script](deep_gemm/jit/interleave_ffma.py) to modify the `FFMA` instructions in the compiled binary. Besides simply modifying the `yield` bit, we also flip the `reuse` bit (registers cannot be reused if the warp is yielded). This adjustment improves performance (10%+ in some cases) for fine-grained scaling FP8 GEMMs by creating more opportunities to overlap MMA instructions with promotion `FFMA` instructions.