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117 lines
4.1 KiB
Markdown
117 lines
4.1 KiB
Markdown
---
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layout: static_page
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title: How to mine on a pool with xmr-stak-cpu
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---
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# Selecting a pool
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There are many pools to choose from, a list is available at
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[moneropools.com](https://moneropools.com). Mining on a larger pool could mean
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more frequent payouts, but mining on a smaller pool helps to keep the network
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decentralised.
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# Selecting a CPU miner
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Just like pools, there are a lot of miners to choose from. The one that you
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should pick depends on the hardware you want to mine on. This guide will only
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use a CPU miner, and will be using
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[xmr-stak-cpu](https://github.com/fireice-uk/xmr-stak-cpu). Alternatives include
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[wolf's CPUMiner](https://github.com/wolf9466/cpuminer-multi) and
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[sgminer-gm](https://github.com/genesismining/sgminer-gm). However, their
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configuration is slightly different and will not be covered in this guide.
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## For Windows Systems
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If you are using a Windows system, the developer of xmr-stak-cpu provides
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binaries to download on the
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[GitHub release page](https://github.com/fireice-uk/xmr-stak-cpu/releases).
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Download `xmr-stak-cpu-win64.zip` and extract it somewhere you'll be able to
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find it again.
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## For Other Operating Systems
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If you're not using Windows, you will have to compile xmr-stak-cpu for yourself,
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luckily this isn't as hard as it sounds. Before you can compile the miner, you
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will need to install some of its prerequisites.
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For Debian-based distros:
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sudo apt-get install libmicrohttpd-dev libssl-dev cmake build-essential
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For Red Hat based distros:
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sudo yum install openssl-devel cmake gcc-c++ libmicrohttpd-devel
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<!-- TODO: Add dependencies for other operating systems? -->
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Following this, you just need to use cmake to generate the build files, run
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make and copy the config file:
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mkdir build-$(gcc -dumpmachine)
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cd $_
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cmake ../
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make -j$(nproc)
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cp ../config.txt bin/
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cd bin
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Don't celebrate just yet, as the miner needs to be configured. Running the miner
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now should give you a block of text to copy and paste:
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Open `config.txt` and *replace* the two `"cpu_threads_conf"` lines with the text
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you just copied. It should look something like this afterwards:
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Scroll down in the file until you see the lines containing `"pool_address"`.
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*Replace* the contents of the second set of quotes with the address and port of
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the pool you chose earlier. You can find this information on the pool's website.
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Put your wallet address between the quotes on the wallet address. You may leave
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the password blank unless the pool specifies otherwise.
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After this, your config should look something like this:
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# Running the miner
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**Save the config** file and run the miner!
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Some pools allow you to monitor your hashrate by pasting your address into their
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website. You can also monitor your hashrate by pressing the `h` key.
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# Tuning the miner
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You might see nasty messages like this:
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[2017-07-09 12:04:02] : MEMORY ALLOC FAILED: mmap failed
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This means that you can get around a 20% hashrate boost by enabling large pages.
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## Large pages on Linux
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Firstly stop the miner (if it's running), run the following commands to enable
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large pages and then start the miner as root:
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sudo sysctl -w vm.nr_hugepages=128
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sudo ./xmr-stak-cpu
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## Large pages on Windows
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Taken from `config.txt`:
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>By default we will try to allocate large pages. This means you need to "Run As Administrator" on Windows
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You need to edit your system's group policies to enable locking large pages. Here are the steps from MSDN
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1. On the Start menu, click Run. In the Open box, type gpedit.msc.
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2. On the Local Group Policy Editor console, expand Computer Configuration, and then expand Windows Settings.
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3. Expand Security Settings, and then expand Local Policies.
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4. Select the User Rights Assignment folder.
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5. The policies will be displayed in the details pane.
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6. In the pane, double-click Lock pages in memory.
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7. In the Local Security Setting – Lock pages in memory dialog box, click Add User or Group.
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8. In the Select Users, Service Accounts, or Groups dialog box, add an account that you will run the miner on
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9. Reboot for change to take effect.
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