DDraceNetwork - developer

DDraceNetwork

Development / developer

Development discussion. Logged to https://ddnet.tw/irclogs/ Connected with DDNet's IRC channel, Matrix room and GitHub repositories — IRC: #ddnet on Quakenet | Matrix: #ddnet-developer:matrix.org GitHub: https://github.com/ddnet

Between 2023-04-06 00:00:00Z and 2023-04-07 00:00:00Z

[ddnet/ddnet] Issue opened: #6498 need report button

when i need reporting someone, it is difficult.

click here http://ger10.ddnet.org/ @7mzom alonso

07:39

also trol for playing on phone xd

@Ryozuki in libtw it says "Huffman compression has an extra byte if the actual end is at a byte boundary." did you know that? for you buggy huffman :)

ChillerDragon

@Ryozuki in libtw it says "Huffman compression has an extra byte if the actual end is at a byte boundary." did you know that? for you buggy huffman :)

yeah probs

09:22

ill fix it someday

i see my self using ur crate

09:22

soon(tm)

09:23

where can i pre order?

09:24

@heinrich5991 are the first two bits of the packet header unused? I wanted to double check here https://github.com/heinrich5991/libtw2/blob/master/doc/quirks.md but it didnt mention it

libtw2/quirks.md at master · heinrich5991/libtw2

Some Teeworlds stuff in Rust. Contribute to heinrich5991/libtw2 development by creating an account on GitHub.

09:24

what a bloated protocol did we waste 2 bits of bandwith for EVERY tw packet ever sent over the network in the last 4 decades?

Yeah, disgraceful

damn

09:50

imagine the alternative

09:50

bitpacking nightmare

https://www.dragonflydb.io/

Dragonfly - The Fastest In-Memory Data Store

Discover Dragonfly - the fastest in-memory data store for high-performance applications.

10:10

has anyone tried this

10:10

redit alternative

10:10

claimingto be way faster

10:10

sadly its c++

10:11

this is scaling related so maybe @Avolicious knows the man of scalability

10:17

@Learath2 is calloc more efficient than malloc + memzeroing?

10:18

calloc zeroes btw

It should be but you can only know by knowing the exact platform to be deployed on

ur lovely x86

Calloc can skip the memset theoretically if the allocator has a piece of memory already zero'd

@Learath2 why is there no version of malloc that has the interface of calloc, elements and single element size? is there no possible optimizations knowing more info?

Also if you calloc I think it's also allowed to be lazy and give you a CoW zero'd page

malloc(n, size) that doesnt zero i mean

10:23

xd

Ryozuki

@Learath2 why is there no version of malloc that has the interface of calloc, elements and single element size? is there no possible optimizations knowing more info?

Iirc jemalloc had something of sorts. But honestly afaik even calloc doesn't use that information for anything, atleast as far as I know in x86

10:24

Maybe in some exotic platform it can be used for alignment?

I guess without knowing the data type for e.g. cache lines it's not really optimizable?

also do u know what malloc_consolidate is, i had* a segfault ystday with llvm (edited)

10:25

i think it happens when everything is doomed

Maybe a malloc that doesn't guarantee the given size is the size of the returned memory would help

malloc_consolidate(): unaligned fastbin chunk detected

10:28

another morning with my lovely gentoo

Image attachment

If I recall correctly malloc_consolidate is called so unused chunks can be merged back

what more pleasure than compiling ur own software

Learath2

If I recall correctly malloc_consolidate is called so unused chunks can be merged back

Why do u even know about it xd

You may have accidentally over or underflowed your allocation corrupting a struct header

@Learath2 probably, this is the problem with C, im using a C api that wraps a c++ api and they have poor docs

Jupstar ✪

Why do u even know about it xd

I wrote a malloc implementation as an exercise once upon a time. I remember looking into other implementations to see what they do

so im not safe like in rust

10:29

just remake llvm in rust

Yeah, malloc_consolidate is called on free to try merge the newly freed memory into the tail of a previously freed chunk

Ryozuki

so im not safe like in rust

Where are the safe llvm wrappers xd

xd

10:31

its hard to make a safe wrapper of such a big api

10:31

llvm is quite brittle ngl

What are you doing with the llvm api anyway?

i use the llvm C api to use it from rust

10:32

i use it for work and my own language edlang

10:32

they claim to have a C api so u can make bindings

10:32

c++ is harder to interop

Ryozooki, why don't you link to rust core for your malloc?

but they rly focus more on the c++ side xd

10:33

@Learath2 i didnt implement any malloc

10:33

this error was from llvm breaking

10:33

by me using the api in the wrong way

Ohh, llvm is using the malloc

not me executing my compiled program

10:33

yeah

Anyway, asan should find this extremely easily

Ryo u a smartass compiler dev now. Just make own llvm in rust

this is why i dont code in c

10:35

i dont wanna use asan absan and ur mom

10:35

rust just works

Lmao

btw rust has MIR for unsafe

10:36

miri*

10:36

ooops

10:36

https://github.com/rust-lang/miri

GitHub - rust-lang/miri: An interpreter for Rust's mid-level interm...

An interpreter for Rust's mid-level intermediate representation - GitHub - rust-lang/miri: An interpreter for Rust's mid-level intermediate representation

Ryozuki

i dont wanna use asan absan and ur mom

Then just don't overflow bozo yeecool

yeecool

Image attachment

10:37

You can use Miri to emulate programs on other targets, e.g. to ensure that byte-level data manipulation works correctly both on little-endian and big-endian systems. See cross-interpretation below.

10:38

interesting

Image attachment

Learath2

Then just don't overflow bozo yeecool

yeecool

ez

10:40

@Jupstar ✪ https://developer.chrome.com/blog/webgpu-release/

Chrome ships WebGPU - Chrome Developers

After years of development, the Chrome team ships WebGPU which allows high-performance 3D graphics and data-parallel computation on the web.

10:40

webgpu name is a misnomer but yeah

10:40

WebGPU is a new API for the web, which exposes modern hardware capabilities and allows rendering and computation operations on a GPU, similar to Direct3D 12, Metal, and Vulkan. Unlike the WebGL family of APIs, WebGPU offers access to more advanced GPU features and provides first-class support for general computations on the GPU. The API is designed with the web platform in mind, featuring an idiomatic JavaScript API, integration with promises, support for importing videos, and a polished developer experience with great error messages.

10:41

@Jupstar ✪ https://hothardware.com/news/ddr5-mrdimms-standardized-up-to-17600

AMD And JEDEC Are Collaborating On DDR5 MRDIMMs At A Blistering 17,...

JEDEC has revealed a new standard that accesses two DDR5 memory ranks simultaneously to double bandwidth.

10:41

hot

10:41

17,600 MT/s

I think we are way past speeds relevant to the consumer. I bet these are great when you are running 500GB of ram on a caching proxy server at a datacenter

Ryozuki

@Jupstar ✪ https://developer.chrome.com/blog/webgpu-release/

Epic

Ryozuki

@Jupstar ✪ https://hothardware.com/news/ddr5-mrdimms-standardized-up-to-17600

Epic

Learath2

I think we are way past speeds relevant to the consumer. I bet these are great when you are running 500GB of ram on a caching proxy server at a datacenter

considering specs required for ai. We are just getting started. Tho maybe not so much system ram ^^

10:44

I want personal ai ofc

If local ai instances are going to become common place I think we'll be getting ai accelerators

Yeah but ais will always require lot of ram and good speed

Or at the very least some die space used for matrix extensions on even home cpu/gpus

https://news.ycombinator.com/item?id=35458746

mconley

Firefox engineers discover a Windows Defender bug that causes high CPU usage

10:46

topkek

I could have told u that without searching for it

10:47

Windows slowfender

10:47

As soon as we hit speed limits hardware wise the fastest os design wins

oh shit

10:47

psql15 dropped

In first run this might be Linux. In long run probs smth completely new

Isn’t psql15 old news?

Are u using a rust news client or what

11:15

Ryozuki uses javascript. It takes longer

11:15

But yeah very old news lol

ah ye

11:28

idk i got it on my gentoo

11:28

or forgot to upgrade

11:28

xd

11:35

https://www.reddit.com/r/rust/comments/12cxpsb/rustcs_stablehasher_just_got_a_lot_faster/

r/rust - rustc's StableHasher just got a lot faster

252 votes and 14 comments so far on Reddit

11:36

What this means: faster incremental builds, since this is the component rustc uses to hash the incremental compilation data.

I heard gccs unordered map is faster than rusts hashmap

11:38

Did that change now xd

Ryozuki

Click to see attachment 🖼️

I started using that at work as a replacement for sanitizers in Rust. It seems a bit slower than sanitizers though, and has some limitations

rust uses a conservative hashmap

11:49

hash *

11:49

u can change it

deen

I started using that at work as a replacement for sanitizers in Rust. It seems a bit slower than sanitizers though, and has some limitations

do u code in rust?

11:50

yeah i think its pretty in development, and is specially made for rust

Mostly python, but some of our testing code is Rust

i see

11:51

why testing? xD

My job is writing code that finds bugs, aka testing

ohhh

11:53

MIRI is like an abstract machine or smth

11:53

The implementation of the Rust abstract machine - miri - stops execution of Rust programs when they exhibit undefined behavior.

>

C, C++, etc. don't even have implementations of their abstract machines. They don't have one existing as a goal. And they are happy to make certain operations exhibit undefined behavior even if that implies that it would make an implementation of the abstract machine that traps impossible.

>

This is why even if you were to combine valgrind with address sanitizer, memory sanitizer, thread sanitizer, undefined-behavior-sanitizer, and other existing C and C++ tools, there is still a lot of classes of undefined behavior that these tools can't detect.

>

That's fine in C and C++, but not fine in Rust. In Rust, if we add a new type of undefined behavior, the constraint is that it should be (demonstrably) possible to extend miri to detect it, such that if a user doesn't know whether some program exhibits undefined behavior for some inputs, they can just run it under miri, and miri will precisely pinpoint which part of their code exhibited undefined behavior and why, and how their program execution got there.

11:57

can a sanitizer catch access to an invalid union field?

i just entered chat and the first thing i thought was "the code can not unionize"

is it possible to do custom commands instead of binding keys?

Simon

is it possible to do custom commands instead of binding keys?

define custom commands

for example /command exec file.cfg

12:01

no wait

xDDD

i want to do bind command exec file.cfg

12:02

a whole word instead of just a key

arent those just a long list of binds

yes but im out of keys which i can press fast

12:02

mouse only have 5 buttons

do multi binds, like one key you can press to cycle throw a list of binds which will then change the command for another key. U only need 2 keys for that. Use echo messages to tell yourself which "mode" is activated right now

ctrl+k

1 key, x .cfg files, another key for the bind to be executed

12:04

e.g. n will change the command and an echo to tell urself which one is it currently, and m will execute it.

Yo @Ryozuki what do you work that you build compilers at work?

stuff

12:07

im not sure about sharing more personal details about me xd

Just stalk his gh

chiller tell us

12:07

what do u work as

He contributes to some stuff xd

or is ur life just staying afk in ddnet

Chiller is millionaire chilling his life

whenver i start ddnet ur there

12:07

afk

12:08

and if i talk to u ur bot says ur afk

Xdd

Ryozuki

im not sure about sharing more personal details about me xd

In how far does telling what u work leak ur personal information? I mean we all work as programmers, so much is clear

Ok fair same here (@Ryozuki)

im not sure about sharing more personal details about me xd

fokkonaut

In how far does telling what u work leak ur personal information? I mean we all work as programmers, so much is clear

tell me the name of ur company, website, address, etc

12:09

in this discord with degens

ah, yea no

12:09

definitely not haha

CEO.google.com

its me

well if i worked at google i would say it

12:09

xd

I meant what field you work in and what your current project is that it involves such low level things

i dont think its that weird

12:10

but yeah my company likes to try new stuff

12:10

honestly im happy im paid to do this interesting stuff

I would be ashamed to work for google xd

I want to join u

Google > EA

jk it’s a flex. to work at evil corp

did u know they write compilers for machine learning

12:10

and they use this https://mlir.llvm.org/

Multi-Level IR Compiler Framework

Epic

Win

12:11

fortnite

cring

Epic ryo moment

Plis bay me sum vbuggs

kids dont play fortnite

12:12

they play roblox

12:12

its insane

no

the market

roblox is played by 15 year olds

much bigger player base

12:12

fortnite is dying anyway

nobody cares anyways

Roblox Market Cap Roblox has a market cap or net worth of $27.47 billion as of April 6, 2023. Its market cap has decreased by -8.34% in one year.

Roblox has such a cursed look

the cfg file can be a normal text file right?

12:26

do i store it in the appdata or in the folder with the ddnet exe?

12:28

if i press key to exec the file it just says it failed to open the file

it should be in appdata in the same folder as settings_ddnet.cfg

yes it is

12:30

does it have to be the same fily type?

No

12:31

Can u enable file type in your explorer

yes i got windows

Then do it

12:32

Then copy the full name and exec the full name

12:33

It's enabled if u see settings_ddnet.cfg as one word

12:33

Including the. Cfg

doesnt work

Do screenshot of Ur config dir

Image attachment

Jupstar ✪

Can u enable file type in your explorer

U didn't do this

12:46

U have a file extension twice probably

12:46

.cfg.cfg

12:46

Or .cfg.txt

ahh yes

12:48

now it works

[ddnet/ddnet] Issue closed: #3633 Rescue doesn't work inside freeze tiles on the switch layer

i think i have to do the yearly thermal paste change

14:22

got some new fans too including cpu one

Image attachment

14:22

gotta prepare for the summer heat in this world with climate change kek

why yearly?

14:46

u need to do this maybe all 5 years

14:46

or is ur computer getting so hot lately?

i think i added too little last time

14:48

my cpu is getting at 85C

14:48

when compiling for a bit

it shouldnt even get hot without paste

14:48

(hotter than expected)

whats the expected for 5800x

i dunno

but my case fans are rly old

14:49

like 4 or more years old

14:49

and they are not PWM

14:49

so i got pwm ones

14:49

less noise when nothing and more power when full

14:49

+ the noctua fan for the cpu cooler

14:49

that shit costs 36€ xd

14:50

2000rpm

wow my CPU is almost 4 years old already.. time passed so fast damn

yeah

14:51

the thermal paste is rly important iirc

i think i seen benchmarks where they used none, it was ok

14:51

but ofc the paste will close the gaps

In general, changing thermal paste every one to two years is a good idea. However, we would not recommend relying solely on timeframes to monitor when you need to change your thermal paste.

14:52

random website

14:52

xD

let me ask chatgpt our lord and savior

14:53

i bet u never changed the thermal paste of your GPU in your life

14:53

i did once

14:54

for my old r9 390

14:54

that shit was hot af

14:54

90C sometimes

14:54

xd

oh gg

14:56

openening a gpu is really struggle xd

14:56

so many cool pads (edited)

Ryozuki

In general, changing thermal paste every one to two years is a good idea. However, we would not recommend relying solely on timeframes to monitor when you need to change your thermal paste.

gpt says almost the same lmao, it read that website

kek

Ryozuki

https://www.dragonflydb.io/

I like dragonflydb but havent got a chance to use it by now, its still on my todo

@heinrich5991 hmm im a bit confused by https://github.com/heinrich5991/libtw2/blob/7885c99974ee445ce13297b72ae3e7c6ea3b969d/wireshark-dissector/src/tw7.rs#L319

libtw2/tw7.rs at 7885c99974ee445ce13297b72ae3e7c6ea3b969d · heinric...

Some Teeworlds stuff in Rust. Contribute to heinrich5991/libtw2 development by creating an account on GitHub.

15:28

you call it accept_connection which in my head maps to CONNECTION_ACCEPT which was replaced by ACCEPT in 0.7

15:29

https://github.com/teeworlds/teeworlds/commit/d3fc0807d5f59d88661c8e58854805b064db3c4d

Remove useless NET_CTRLMSG_ACCEPT from the network · teeworlds/te...

Rename NET_CTRLMSG_CONNECTACCEPT to take its place. The connection buildup looks like this (as before): ``` -> CONNECT <- ACCEPT -> first data packet or KEEPALIVE due to tim...

i think heinric is in a asian timezone

15:30

he is always wake late

so imo in tw.rs is should still say accept_connection but in tw7.rs it should say just accept

15:30

weeb5991

15:31

@Ryozuki how u know? u saw his insta story? xd

by when he is online

sherlock

15:32

ryo doxing heinric location!

15:32

using metadata

Jupstar ✪

i bet u never changed the thermal paste of your GPU in your life

Friend of mine had a gpu that performed like horseshit out of the factory. It was overheating too, when I opened it up the thermal paste wasn't anywhere near the gpu die, like half the die was uncovered. So not a horrible idea to check if you get unexpected temps

Learath2

Friend of mine had a gpu that performed like horseshit out of the factory. It was overheating too, when I opened it up the thermal paste wasn't anywhere near the gpu die, like half the die was uncovered. So not a horrible idea to check if you get unexpected temps

thank god that i use a microwave oven

‍

python has the worst eco system of them all. Its even worse than c++. Change my mind.

17:16

I rather have no package manager than 30 competing ones that are broken in their own way omg

whats your opinion on the node (npm) one?

its bad too but better from my expirience so far

cargo build

also bad but much better

17:23

so far the only problem i have with cargo is its super big and slow git index you have to keep updated

17:23

but they are on it heinrich promised me

there is a fix already

17:24

its not enabled by default yet but it will soon

ok then cargo the only eco sys i have no problems with yet

def foo():
  return 8 * 8

@Learath2 leratooooooooooooo!!! daily python trivia!!!!!!!!!!!!!!!!!!!do you pay for for the 8 * 8 multiplication at runtime?

https://blog.rust-lang.org/2023/03/09/Rust-1.68.0.html#cargos-sparse-protocol

Announcing Rust 1.68.0 | Rust Blog

Empowering everyone to build reliable and efficient software.

17:25

read

chillerdragon

def foo():
  return 8 * 8

@Learath2 leratooooooooooooo!!! daily python trivia!!!!!!!!!!!!!!!!!!!do you pay for for the 8 * 8 multiplication at runtime?

probs not

yes dis heinrich sent last timne i bitched about it xd

17:25

indeed ryo pro

i mean its rly obvious

17:26

and stupid if not optimized

>>> import dis
>>> def foo():
...   return 8 * 8
... 
>>> foo()
64
>>> dis.dis(foo)
  2           0 LOAD_CONST               1 (64)
              2 RETURN_VALUE
>>>

you can get python bytecode with python o.O

chillerdragon

>>> import dis
>>> def foo():
...   return 8 * 8
... 
>>> foo()
64
>>> dis.dis(foo)
  2           0 LOAD_CONST               1 (64)
              2 RETURN_VALUE
>>>

wtf are these code words

wot?

dis? foo?

foo is my function

you can not say these with a straight face

dis is from python to get python bytecode

def foo():
  a = 2
  return a * a

@Ryozuki you reached level 2 of daily lerato.py trivia! same question new code

same

and here your streak ends

17:31

python slow

then python sucks

>>> def foo():
...   a = 2
...   return a * a
... 
>>> foo()
4
>>> import dis
>>> dis.dis(foo)
  2           0 LOAD_CONST               1 (2)
              2 STORE_FAST               0 (a)

  3           4 LOAD_FAST                0 (a)
              6 LOAD_FAST                0 (a)
              8 BINARY_MULTIPLY
             10 RETURN_VALUE
>>>

so bad

17:32

maybe this pyc code is not optimized

17:32

well whathever this is

idc if there are optimization levels of python bytecode

17:32

idk*

https://en.wikipedia.org/wiki/Constant_folding

Constant folding

Constant folding and constant propagation are related compiler optimizations used by many modern compilers. An advanced form of constant propagation known as sparse conditional constant propagation can more accurately propagate constants and simultaneously remove dead code.

https://stackoverflow.com/a/62656844 i fear there is no python way to tell the compiler to optimize

Python: compile with optimize and execute

my Python program is slow and I wanted to test if it would speed up if I complied it (with code optimization) and executed it afterward. So what are the terminal commands to do so? I'm searching for

17:41

i feel like the best way to write python is to write rust ._.

ofc

[ddnet/ddnet] Issue opened: #6499 transparency in grass_main.png

transparency in all curved grass tiles data/mapres/grass_main.png !ddnet_grassmain

Ryozuki

ur lovely x86

also depends on DRAM vendor, some allow to zero out directly in place

oh didnt know

but x86 has optimization to only mark null cache line instead of transferring them

18:55

which ironically allows some nice data leak

hi is there any plan to port the game to consoles? didnt find anything about this just curious

money

wha-

Nope, honestly the game doesn't work very well with controllers to begin with

[ddnet/ddnet] Issue opened: #6500 replace images with the same name not working anymore

can no longer replace images in the editor with the same name, this sucks while working on tilesets. this used to work, now it displays "image named 'xxx' was already added." in red text. I guess "readd" option was added for this case, but this doesn't work when the map/client was closed.

Learath2

Nope, honestly the game doesn't work very well with controllers to begin with

is it a thing? i remember cen94ok showed me his controller gameplay on 0.7 and everything seemed good to him

You can play with a controller in ddnet right now too, I didn't enjoy it too much but maybe you'd

Learath2

Nope, honestly the game doesn't work very well with controllers to begin with

The thing is i use ps4 pro with keyboard and mouse

20:52

Dont have a setup to play tw with, so was wondering if it could work out or nah

20:53

And i play tw since 2011 so it wont feel great not to be able to play

ps4 & switch system and graphics APIs are locked behind developer programs that are incredibly hard to get into for open-source authors

22:00

and there is no existing directx backend for use on xbox

22:01

so for any platform it would be a tremendous amount of work. somehow get into the developer program, add a new graphics backend, deal with the countless quirks of the system, and of course, somehow navigating the UI with a controller

22:05

if you care that much there was a thing floating around a little while ago that you could install linux on a ps4

22:06

i have no idea if there is an opengl implementation for the ps4's gpu. i would assume not & have no idea if it would work under existing amdgpu stuff

[ddnet:master] 27 new commits

f4c3fee Use ShowFileDialogError instead of ShowPopupMessage - Robyt3 3d343c8 Remove unnecessary popup debug message - Robyt3 caac7b0 Fix static usage of POPEVENT_* enum literals - Robyt3 c6d14e5 Move all editor popup function definitions to popups.cpp - Robyt3 df91bb9 Refactor layer properties functions - Robyt3 c1ffc8b Refactor CEditor::PopupMenuFile - Robyt3 eda808e Refactor CEditor::PopupGroup - Robyt3 9f5de0c Refactor CEditor::PopupLayer - Robyt3 2146d7b Refactor CEditor::PopupQuad - Robyt3 5cfecdb Refactor CEditor::PopupSource - Robyt3 141571c Refactor CEditor::PopupNewFolder and improve layout - Robyt3 04d9e2b Refactor CEditor::PopupMapInfo and improve layout - Robyt3 e09a771 Refactor CEditor::PopupPoint - Robyt3 7289f7d Refactor CEditor::PopupImage - Robyt3 91ce99b Refactor CEditor::PopupSound - Robyt3 b20cf78 Refactor CEditor::PopupEvent and improve layout - Robyt3 f3f44ca Refactor CEditor::PopupSelectImage - Robyt3 c730cd4 Refactor CEditor::PopupSelectSound - Robyt3 03e7cfc Refactor CEditor::PopupSelectGametileOp - Robyt3 04c1e06 Refactor CEditor::PopupSelectConfigAutoMap - Robyt3 b839c68 Refactor CEditor::PopupSpeedup - Robyt3 c4b2531 Refactor CEditor::PopupSwitch - Robyt3 d5a24d7 Refactor CEditor::PopupTune - Robyt3 8bdf2cf Refactor CEditor::PopupGoto - Robyt3 9391155 Refactor CEditor::PopupColorPicker - Robyt3 3c841f7 Refactor CEditor::PopupEntities - Robyt3 b4c1144 Merge #6492 - bors[bot]

22:08

[ddnet/ddnet] Pull request closed: #6492 Refactor editor popups, improve layout of new folder, map details and event popups

Exported 336 message(s)