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From becb71f3e815df0df1d2895bd3ad300269a695a4 Mon Sep 17 00:00:00 2001
From: Vasiliy Stelmachenok <cabopust@yandex.ru>
Date: Tue, 4 May 2021 14:56:48 +0300
Subject: [PATCH] NVreg Improvements
This patch edits the default values of the NVIDIA kernel module
parameters, and makes the following changes:
NVreg_UsePageAttributeTable=1 (Default 0) - Activating the better
memory management method (PAT). The PAT method creates a partition type table
at a specific address mapped inside the register and utilizes the memory architecture
and instruction set more efficiently and faster.
If your system can support this feature, it should improve CPU performance.
NVreg_EnablePCIeGen3=1 (Default 0) - Enable PCIe Gen 3.x support.
If your graphics card supports PCIe 3.x, this driver module option
can active the high-speed 8 GT bus.
By default the Nvidia driver is set to use PCIe Gen 2.x for compatibility reasons.
NVreg_InitializeSystemMemoryAllocations=0 (Default 1) - Disables
clearing system memory allocation before using it for the GPU.
Potentially improves performance, but at the cost of increased security risks.
Write "options nvidia NVreg_InitializeSystemMemoryAllocations=1" in /etc/modprobe.d/nvidia.conf,
if you want to return the default value.
Note: It is possible to use more video memory (?)
NVreg_EnableStreamMemOPs=1 (Default 0) - Activates the support for
CUDA Stream Memory Operations in user-mode applications.
If you want to learn more about the NVIDIA driver module parameters,
you can go to the Gentoo Wiki page or view the source code of the nv-reg.h file.
---
kernel/nvidia/nv-reg.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/nvidia/nv-reg.h b/kernel/nvidia/nv-reg.h
index 1ee7473..7ea5acf 100644
--- a/kernel/nvidia/nv-reg.h
+++ b/kernel/nvidia/nv-reg.h
@@ -774,13 +774,13 @@ NV_DEFINE_REG_ENTRY_GLOBAL(__NV_MODIFY_DEVICE_FILES, 1);
NV_DEFINE_REG_ENTRY(__NV_DEVICE_FILE_UID, 0);
NV_DEFINE_REG_ENTRY(__NV_DEVICE_FILE_GID, 0);
NV_DEFINE_REG_ENTRY(__NV_DEVICE_FILE_MODE, 0666);
-NV_DEFINE_REG_ENTRY(__NV_INITIALIZE_SYSTEM_MEMORY_ALLOCATIONS, 1);
-NV_DEFINE_REG_ENTRY(__NV_USE_PAGE_ATTRIBUTE_TABLE, ~0);
+NV_DEFINE_REG_ENTRY(__NV_INITIALIZE_SYSTEM_MEMORY_ALLOCATIONS, 0);
+NV_DEFINE_REG_ENTRY(__NV_USE_PAGE_ATTRIBUTE_TABLE, 1);
NV_DEFINE_REG_ENTRY(__NV_REGISTER_FOR_ACPI_EVENTS, 1);
-NV_DEFINE_REG_ENTRY(__NV_ENABLE_PCIE_GEN3, 0);
+NV_DEFINE_REG_ENTRY(__NV_ENABLE_PCIE_GEN3, 1);
NV_DEFINE_REG_ENTRY(__NV_ENABLE_MSI, 1);
NV_DEFINE_REG_ENTRY(__NV_TCE_BYPASS_MODE, NV_TCE_BYPASS_MODE_DEFAULT);
-NV_DEFINE_REG_ENTRY(__NV_ENABLE_STREAM_MEMOPS, 0);
+NV_DEFINE_REG_ENTRY(__NV_ENABLE_STREAM_MEMOPS, 1);
NV_DEFINE_REG_ENTRY(__NV_RM_PROFILING_ADMIN_ONLY_PARAMETER, 1);
NV_DEFINE_REG_ENTRY(__NV_PRESERVE_VIDEO_MEMORY_ALLOCATIONS, 0);
--
2.31.1
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