From ff2c214992eb0eee6038a082d5e4f18de791785e Mon Sep 17 00:00:00 2001
From: Keita Watanabe <keitaw09@gmail.com>
Date: Tue, 31 Dec 2024 09:19:49 +0900
Subject: [PATCH] Update efa-env-var.md

Making it consistent with https://github.com/aws-samples/awsome-distributed-training/blob/main/1.architectures/efa-cheatsheet.md

Signed-off-by: Keita Watanabe <keitaw09@gmail.com>
---
 doc/efa-env-var.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/efa-env-var.md b/doc/efa-env-var.md
index cf75034e2..f5e04c56b 100644
--- a/doc/efa-env-var.md
+++ b/doc/efa-env-var.md
@@ -74,6 +74,11 @@ versions of your libfabric.
       behaves very differently, especially on newer kernels, where <code>RDMAV_FORK_SAFE=1</code>
       can break things.</td>
    </tr>
+   <tr>
+      <td><code>`NCCL_SHM_USE_CUDA_MEMCPY=1</code></td>
+      <td>Setting this when you run NCCL on g6/g5. It gives x2 performance in comparison to default memcpy.</td>
+   </tr>
+
    <tr>
       <td><code>RDMAV_*</code></td>
       <td>Do not use.</td>