From 392ececbebc2ab388b1e65b38cdf8bec305e58cd Mon Sep 17 00:00:00 2001 From: Samantha Gidlow Date: Tue, 1 Jun 2021 13:47:53 -0400 Subject: [PATCH] BZ-1871794: Added an IMPORTANT note to the config-yaml file --- modules/installation-bare-metal-config-yaml.adoc | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/modules/installation-bare-metal-config-yaml.adoc b/modules/installation-bare-metal-config-yaml.adoc index 62b78c48d8..500bd6a68c 100644 --- a/modules/installation-bare-metal-config-yaml.adoc +++ b/modules/installation-bare-metal-config-yaml.adoc @@ -218,9 +218,14 @@ of {product-title} will support defining multiple compute pools during installation. Only one control plane pool is used. <3> Whether to enable or disable simultaneous multithreading (SMT), or `hyperthreading`. By default, SMT is enabled to increase the performance of your machines' cores. You can disable it by setting the parameter value to `Disabled`. If you disable SMT, you must disable it in all cluster machines; this includes both control plane and compute machines. + +[NOTE] +==== +Simultaneous multithreading (SMT) is enabled by default. If SMT is not enabled in your BIOS settings, the `hyperthreading` parameter has no effect. +==== ++ [IMPORTANT] ==== -If you disable simultaneous multithreading (SMT) using the `install-config.yaml` file or in your BIOS settings, ensure that your capacity planning accounts for the dramatically decreased machine performance. If you disable SMT in the BIOS, the `hyperthreading` parameter in the `install-config.yaml` file will have no effect. +If you disable `hyperthreading`, whether in the BIOS or in the `install-config.yaml`, ensure that your capacity planning accounts for the dramatically decreased machine performance. ==== <4> You must set the value of the `replicas` parameter to `0`. This parameter controls the number of workers that the cluster creates and manages for you,