From 18919ef585082becd984eb4d90310cd317babfc9 Mon Sep 17 00:00:00 2001
From: Ansariel Hiller <Ansariel@users.noreply.github.com>
Date: Wed, 6 Dec 2023 18:04:29 +0100
Subject: [PATCH] BUG-234706 Fix unstable performance on nvidia systems by
always enabling Threaded Optimization via driver application profile (#564)
---
indra/newview/llappviewerwin32.cpp | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/indra/newview/llappviewerwin32.cpp b/indra/newview/llappviewerwin32.cpp
index 8cf80f388b1..41101e79a64 100644
--- a/indra/newview/llappviewerwin32.cpp
+++ b/indra/newview/llappviewerwin32.cpp
@@ -369,6 +369,35 @@ void ll_nvapi_init(NvDRSSessionHandle hSession)
nvapi_error(status);
return;
}
+
+ // enable Threaded Optimization instead of letting the driver decide
+ status = NvAPI_DRS_GetSetting(hSession, hProfile, OGL_THREAD_CONTROL_ID, &drsSetting);
+ if (status == NVAPI_SETTING_NOT_FOUND || (status == NVAPI_OK && drsSetting.u32CurrentValue != OGL_THREAD_CONTROL_ENABLE))
+ {
+ drsSetting.version = NVDRS_SETTING_VER;
+ drsSetting.settingId = OGL_THREAD_CONTROL_ID;
+ drsSetting.settingType = NVDRS_DWORD_TYPE;
+ drsSetting.u32CurrentValue = OGL_THREAD_CONTROL_ENABLE;
+ status = NvAPI_DRS_SetSetting(hSession, hProfile, &drsSetting);
+ if (status != NVAPI_OK)
+ {
+ nvapi_error(status);
+ return;
+ }
+
+ // Now we apply (or save) our changes to the system
+ status = NvAPI_DRS_SaveSettings(hSession);
+ if (status != NVAPI_OK)
+ {
+ nvapi_error(status);
+ return;
+ }
+ }
+ else if (status != NVAPI_OK)
+ {
+ nvapi_error(status);
+ return;
+ }
}
//#define DEBUGGING_SEH_FILTER 1
--
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