From c6eb15875f508076f3f26de4f7da3899701bc4db Mon Sep 17 00:00:00 2001
From: Oren <47992694+OrenLeung@users.noreply.github.com>
Date: Wed, 24 Jul 2024 22:55:00 -0400
Subject: [PATCH] doc: add all2all factor

---
 doc/PERFORMANCE.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/PERFORMANCE.md b/doc/PERFORMANCE.md
index 21fef60..942f054 100644
--- a/doc/PERFORMANCE.md
+++ b/doc/PERFORMANCE.md
@@ -140,5 +140,6 @@ To obtain a bus bandwidth which should be independent of the number of ranks _n_
 * AllGather : (_n_-1)/_n_
 * Broadcast : 1
 * Reduce : 1
+* AlltoAll: (_n_-1)/_n_
 
 The bus bandwidth should reflect the speed of the hardware bottleneck : NVLink, PCI, QPI, or network.