nanom1t

Gain massive GPU performance for Southern Islands AMD GPUs on Linux by removing DPM quirks in the kernel

I recently found out that my r9 270x GPU was not hitting full clock speeds because it was being throttled by the kernel based on old bug reports on DPM stability. This was an easy fix on gentoo where recompiling the kernel is trivial, but on ubuntu and similar, rebuilding the kernel is not so straightforward, so here's a guide based on ubuntu 16.04 LTS. If you run gentoo or know what you're doing you can just skip to the relevant code.

On my r9 270x, this resulted in an overall improvement in frame-rates of up to 50%: Unigine Valley went from something like 30-40 fps average to 55-60 and osu! (running in wine) went from 0.33 ms (~3000fps) to 0.25ms (~4000fps).

Note that I'm no linux god and all this info was pieced together by googling and asking on forums (credits to the guys at phoronix for pointing me to the quirks code).

If you're using the proprietary amdgpu-pro driver, read until the end of the

Screen Quick Reference

Basic

Description	Command
Start a new session with session name	`screen -S <session_name>`
List running sessions / screens	`screen -ls`
Attach to a running session	`screen -x`
Attach to a running session with name	`screen -r`

Wifi on Ubuntu 18 server

TLDR

Install wpasupplicant
Turn on wifi radios: sudo nmcli radio wifi on
Check your devices are recognised even if they're not "managed": sudo iwconfig
Check your wifi (here called "wlp3s0") is capable of detecting nearby routers: sudo iwlist wlp3s0 scan
Configure netplan by dropping a file called 01-netcfg.yaml into /etc/netplan/ or edit existing file there. See example below.
netplan try, netplan generate, netplan apply.

Get device numbers

$ nvidia-smi -L
GPU 0: GeForce GTX 1070 (UUID: GPU-2a97b3b6-2318-aa98-f163-d164eb9d54fd)
GPU 1: GeForce GTX 1070 Ti (UUID: GPU-d2085209-9bc9-f2ac-9983-dd7b4a0627dd)
GPU 2: TITAN Xp COLLECTORS EDITION (UUID: GPU-1334cd53-38d9-7e44-4634-6e8290de0795)

Set maximum power limit

	#!/bin/bash

	<<LICENSE
	Copyright (C) 2018-2019 kevinlekiller

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	package main

	import (
	"encoding/base64"
	"github.com/gorilla/mux"
	"net/http"
	"strings"
	)

	func main() {


	import UIKit
	import StoreKit

	//MARK: SKProductsRequestDelegate

	extension IAPHelpers : SKProductsRequestDelegate
	{
	func productsRequest(request: SKProductsRequest, didReceiveResponse response: SKProductsResponse)
	{

	package main

	import (
	"encoding/base64"
	"net/http"
	"strings"
	)

	type handler func(w http.ResponseWriter, r *http.Request)

	#!/bin/bash

	#nvidia-xconfig --allow-empty-initial-configuration --enable-all-gpus --cool-bits=28 --separate-x-screens

	nvidia-smi -pm ENABLED

	export GPU_FORCE_64BIT_PTR=0
	export GPU_MAX_HEAP_SIZE=100
	export GPU_USE_SYNC_OBJECTS=1
	export GPU_MAX_ALLOC_PERCENT=100

	#!/bin/bash
	#set persistence mode for all GPU
	sudo nvidia-smi -pm 1

	#Set gpu max power at 160w
	sudo nvidia-smi -pl 160

	#Set Power level of specific GPU (1080) in watts
	# sudo nvidia-smi -i 2 -pl 200