---
page_id: wsd-is-the-drc-using-klayout-supposed-to-b9b439e4
type: context-page
schema_version: 1
template_id: discord-page
template_version: template-0.1.0
title: "Thread: Is the DRC using KLayout supposed to"
slug: wsd-is-the-drc-using-klayout-supposed-to-b9b439e4
route: /evidence/i-information/general/threads/is-the-drc-using-klayout-supposed-to
section: reference
access: public
summary: 4 Discord messages from ℹ️ - Information/general/threads/is-the-drc-using-klayout-supposed-to.md.
status: published
asset_base: .
home_href: /
md_url: /evidence/i-information/general/threads/is-the-drc-using-klayout-supposed-to.md
toc_enabled: true
talk_enabled: false
agent_view_enabled: true
copy_buttons_enabled: true
footer_enabled: true
search_indexed: true
tags: [discord, wafer-space, archive]
last_updated: 2026-08-19
talk_url: /evidence/i-information/general/threads/is-the-drc-using-klayout-supposed-to.talk.md
talk_route: /evidence/i-information/general/threads/is-the-drc-using-klayout-supposed-to/talk
---
# Thread: Is the DRC using KLayout supposed to
Category: **ℹ️ - Information**
Parent channel: **#general**
Thread ID: `1497441633611026463`
Messages: **4**
## message-1497511249108275200
**2026-04-25T08:15:04.201+00:00 — Leo Moser (mole99) (@mole99)**
- Message ID: `1497511249108275200`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `21`
- Discord message: https://discord.com/channels/1361349522684510449/1497441633611026463/1497511249108275200
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/is-the-drc-using-klayout-supposed-to/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/is-the-drc-using-klayout-supposed-to/2026-04/2026-04.json
**Reply/reference**
- https://discord.com/channels/1361349522684510449/1361349523724570941/1497441633611026463
Reference data
```json
{
"channelId": "1361349523724570941",
"guildId": "1361349522684510449",
"messageId": "1497441633611026463"
}
```
**Content**
```text
```
Other message metadata
```json
{
"author": {
"avatarUrl": "2026-04_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png",
"discriminator": "0000",
"isBot": false,
"roles": [
{
"color": null,
"id": "1423020172595298314",
"name": "Mod",
"position": 4
}
]
},
"message": {
"mentions": [
{
"avatarUrl": "2026-04_media/cb1033d824ad5ed651e8f2b5bbdba391-BCBFE.png",
"color": null,
"discriminator": "0000",
"id": "319853768550121473",
"isBot": false,
"name": "thecomputerguy",
"nickname": "The Computer Guy",
"roles": []
}
]
}
}
```
---
## message-1497511258822541332
**2026-04-25T08:15:06.517+00:00 — Leo Moser (mole99) (@mole99)**
- Message ID: `1497511258822541332`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1497441633611026463/1497511258822541332
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/is-the-drc-using-klayout-supposed-to/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/is-the-drc-using-klayout-supposed-to/2026-04/2026-04.json
**Content**
```text
Yes, KLayout DRC takes a while to run. KLayout can make use of multiple threads, but only in certain situations.
There is a `run_drc.py` script (not sure if its still included in the ws PDK fork) that splits the DRC deck into individual rule decks and runs them in separate processes. This is a naive implementation and has many drawbacks.
We are currently working on a substantially better implementation that uses only KLayout and Ruby scripting. @Clyde Laforge is spearheading this work.
It should be ready to try in ~1/2 weeks, initially with just one worker as before, but with the option to increase the number of workers that run in parallel.
```
Other message metadata
```json
{
"author": {
"avatarUrl": "2026-04_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png",
"discriminator": "0000",
"isBot": false,
"roles": [
{
"color": null,
"id": "1423020172595298314",
"name": "Mod",
"position": 4
}
]
},
"message": {
"mentions": [
{
"avatarUrl": "2026-04_media/e9fd582c6cd4273d01cbf5dfd4bb3455-27807.png",
"color": null,
"discriminator": "0000",
"id": "1401841055975870476",
"isBot": false,
"name": "scafir",
"nickname": "Clyde Laforge",
"roles": []
}
]
}
}
```
---
## message-1497659452726313021
**2026-04-25T18:03:58.697+00:00 — The Computer Guy (@thecomputerguy)**
- Message ID: `1497659452726313021`
- Author ID: `319853768550121473`
- Nickname: The Computer Guy
- User name: thecomputerguy
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1497441633611026463/1497659452726313021
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/is-the-drc-using-klayout-supposed-to/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/is-the-drc-using-klayout-supposed-to/2026-04/2026-04.json
**Content**
```text
Great, it would be nice if it worked better with 128 cores lol
```
Other message metadata
```json
{
"author": {
"avatarUrl": "2026-04_media/cb1033d824ad5ed651e8f2b5bbdba391-BCBFE.png",
"discriminator": "0000",
"isBot": false
},
"message": {}
}
```
---
## message-1499494684651819191
**2026-04-30T19:36:32.085+00:00 — Clyde Laforge (@scafir)**
- Message ID: `1499494684651819191`
- Author ID: `1401841055975870476`
- Nickname: Clyde Laforge
- User name: scafir
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1497441633611026463/1499494684651819191
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/is-the-drc-using-klayout-supposed-to/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/is-the-drc-using-klayout-supposed-to/2026-04/2026-04.json
**Content**
```text
Hey, so the merge request is pretty much ready, and it would be nice to have people try out the new DRC approach. It only work with cli for now. To try it out, clone my repo and branch `git clone -b drc_structure git@github.com:Scafir/globalfoundries-pdk-libs-gf180mcu_fd_pv.git` and you can run it with `klayout -b -r globalfoundries-pdk-libs-gf180mcu_fd_pv/klayout/drc/gf180mcu_drc.rb -rd help=true`
You probably want `-rd workers= -rd threads=1` . I would be very interested to hear about total runtime and amount of RAM usage (compared to whatever method you are currently using `run_drc.py` , gui, ...).
```
Other message metadata
```json
{
"author": {
"avatarUrl": "2026-04_media/e9fd582c6cd4273d01cbf5dfd4bb3455-27807.png",
"discriminator": "0000",
"isBot": false
},
"message": {}
}
```
---