# Plotting speed not scaling with number of cores

**URL:** <https://forum.autonomys.xyz/t/plotting-speed-not-scaling-with-number-of-cores/2210>\
**Category:** Support\
**Tags:** plot\
**Created:** [November 29, 2023, 9:26am UTC](https://forum.autonomys.xyz/t/plotting-speed-not-scaling-with-number-of-cores/2210 "2023-11-29T09:26:02Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![cipoint](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.autonomys.xyz/cipoint/32/1547_2.png) [@cipoint](https://forum.autonomys.xyz/u/cipoint)\
**Post date:** [November 29, 2023, 9:26am UTC](https://forum.autonomys.xyz/t/plotting-speed-not-scaling-with-number-of-cores/2210/1 "2023-11-29T09:26:02Z")

</div>

## Issue Report

I have two PCs:  
PC1: AMD Threadripper 3970X 32-core, quad-channel DDR4  
PC2: AMD Ryzen 3950X 16-core, dual-channel DDR4.  
The 3970X is basically two times the 3950X regarding all specs. It performs pretty much two times as good as the 3950X is all multi-core benchmarls and workloads I have ever done.

Both PC2 have two similar brandnew SSDs.

### Environment

- Ubuntu 22.04
- Advanced CLI
- PC1:
  - CPU: AMD 3970X
  - RAM: 128GB DDR4 quad-channel  
PC2:
  - CPU: AMD 3950X
  - RAM: 96GB DDR4 dual-channel  
Farmers are started with:

```auto
./farmer farm \
--farm-during-initial-plotting \
--reward-address xyz \
path=/media/user/SSD,size=7810000000K 

```

CPU load on 3950X is around 50% (htop average).  
CPU load on 3970X is around 35% (htop average).

### Problem

According to the logs the plotting speeds (1h average) are:

- 3950X: 4.03 MiB/s
- 3970X: 3.19 MiB/s

How can 16 cores perform better than 32 cores?

I tried to start the farmer on the 32-core system like this:

```auto
./farmer farm \
--farm-during-initial-plotting \
--reward-address xyz \
--replotting-thread-pool-size 64 \
--plotting-thread-pool-size 64 \
--farming-thread-pool-size 32 \
path=/media/user/SSD,size=7810000000K

```

But this did not change anything at all.

---

<div class="post-metadata">

**Author:** ![Rabinovitch](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.autonomys.xyz/rabinovitch/32/99_2.png) [@Rabinovitch](https://forum.autonomys.xyz/u/Rabinovitch)\
**Post date:** [January 3, 2024, 3:09pm UTC](https://forum.autonomys.xyz/t/plotting-speed-not-scaling-with-number-of-cores/2210/2 "2024-01-03T15:09:51Z")

</div>

> [@NUMA support is coming](https://forum.autonomys.xyz/t/numa-support-is-coming/2299/17):
>
> NUMA support was released in [Release gemini-3g-2024-jan-03 · subspace/subspace · GitHub](https://github.com/subspace/subspace/releases/tag/gemini-3g-2024-jan-03) Thanks everyone for testing!