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Updated Threads (markdown)

xmrig 2019-08-17 20:24:57 +07:00
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Threads.md

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Optimal number of threads depends on the size of the L3 cache of CPU.
* For **cryptonight** it's **2 MB** or **4 MB** (lower power mode) per thread.
* For **cryptonight-lite** it's **1 MB** or **2 MB** (lower power mode) per thread.
## Options
By default, XMRig try choice optimal threads settings for current CPU with very estimated maximum CPU load 75% (`--max-cpu-usage=75`).
### Algorithm
```
-a, --algo=ALGO cryptonight (default) or cryptonight-lite
```
If you want use CryptoNight-Lite (AEON) you should specify this option `--algo=cryptonight-lite`. For cryptonight (Monero) it's option optional.
### Threads count
```
-t, --threads=N number of miner threads
```
Manually specified number of threads. With `--safe` option this number can be automatically reduced to not to exceed the optimal thread count.
### Algorithm variation
```
-v, --av=N algorithm variation, 0 auto select\n\
```
* `--av=1` For CPUs with hardware AES.
* `--av=2` Lower power mode (double hash) of `1`.
* `--av=3` Software AES implementation.
* `--av=4` Lower power mode (double hash) of `3`.
With `--safe` option you can not select AES variations if your CPU not support AES-NI. It will be adjusted to software AES variation.
### Affinity
```
--cpu-affinity set process affinity to cpu core(s), mask 0x3 for cores 0 and 1
```
### Maximum cpu usage
```
--max-cpu-usage=N maximum cpu usage for automatic threads mode (default 75)\n\
```
It's very estimated maximum CPU usage for auto mode. For example 3 threads of 4, it's about 75%.
### Safe mode
```
--safe safe adjust threads and av settings for current CPU
```
## Examples
**Intel i7 7700**
* without any threads options: 4 threads, av=1, cryptonight, 50% CPU load.
* `--av=2`: 2 threads, av=2, cryptonight, 25% CPU load.
* `--algo=cryptonight-lite`: 4 threads, av=2, cryptonight-lite, 50% CPU load.
* `--algo=cryptonight-lite --av=1`: 6 threads, av=1, cryptonight-lite, 75% CPU load.
* https://github.com/xmrig/xmrig/blob/master/doc/CPU.md