Dougall @dougallj
he/they | cohost: https://t.co/WCIiptUO9B | mastodon: https://t.co/d5Ydif6Lt8 / @[email protected] du.gl Joined February 2007-
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Well that better be either someone using an API wrong or a bad bug.
Fantastical deep information about optimizing for Apple Silicon can now be found here: developer.apple.com/download/apple…
Example of why power draw is a poor proxy for how well a program is utilizing your hardware (i7-7700K CPU in this case). In one case, execution port use is heavy and IPC is high, so the CPU's pipeline is running at high utilization. However power draw is low. Second case...
youtube told me this one might have limited visibility, so rts will be very appreciated youtube.com/watch?v=3xottY…
New blog post: "Entropy decoding in Oodle Data: x86-64 6-stream Huffman decoders" fgiesen.wordpress.com/2023/10/29/ent…
oh my god
Who wouldn't want to read about the cursed ABI that lets you mix ARM64 code and X64 code in the same address space? corsix.org/content/window…
Who wouldn't want to read about the cursed ABI that lets you mix ARM64 code and X64 code in the same address space? corsix.org/content/window…
I think the audience for corsix.org/content/window… is approximately the empty set right now, but that might change if this Arm64EC thing takes off.
I just published the first version of my illustrated SVE (ARMv9 SIMD) instruction list, with a truly absurd number of instruction diagrams and descriptions. Check it out at dougallj.github.io/asil/
Quick first impressions of the new P-core in the A17 Pro: mastodon.social/@dougall/11110…
s/FAT_MAGIC/__builtin_bswap32(FAT_CIGAM)/g
s/FAT_MAGIC/__builtin_bswap32(FAT_CIGAM)/g
I work on Chrome and I'm looking at a bug where chrome.dll is unloaded when it shouldn't be. These crashes are 99.7% correlated with umppc*.dll - aka @CrowdStrike. Is there someone who can look at this?
The mold linker 2.0.0 is out! Starting from this version, mold is available under the MIT license instead of AGPL. github.com/rui314/mold/re…
Please enjoy the cursed "light mode" that I added to this page that already had a white background: dougallj.github.io/applecpu/fires… (link in the top right, depends on HDR, e.g. Chrome or Safari on a recent Apple device not in low power mode)
y-cruncher v0.8.1 is now ready. Speedups on of #AVX512 on #Zen4 grows from 2% to 20+%. Download here: numberworld.org/y-cruncher/ x.com/mysticial/stat… If you're into bignums, The Hybrid NTT algorithm that was the backbone for years is now detailed here: numberworld.org/y-cruncher/int…
y-cruncher v0.8.1 is now ready. Speedups on of #AVX512 on #Zen4 grows from 2% to 20+%. Download here: numberworld.org/y-cruncher/ x.com/mysticial/stat… If you're into bignums, The Hybrid NTT algorithm that was the backbone for years is now detailed here: numberworld.org/y-cruncher/int…
New blog post: propagating bounds through bitwise operations. Already posted on that other social network, but this is for the twitter-only people bitmath.blogspot.com/2023/07/propag…
Asahi Lina / 朝日�.. @LinaAsahi
30K Followers 132 Following Hello everyone, Asahi Lina here! I'm a Linux developer VTuber! EN/日本語｜🎨 #AsahiLinArt｜Model @NananoNanase｜Design @shiranui_illust
Longhorn @never_released
14K Followers 130 Following Kernel/hypervisor engineer @awscloud EC2. Hobby @checkra1n. Mastodon: https://t.co/DsXP8PFgL0 Bluesky: https://t.co/dAOfFSSqY4
Jon Masters 🏴�.. @jonmasters
13K Followers 7K Following Troublemaker | Computer Architect | @Arm Servers Architect @Google | Previously @RedHat, @Nuvia_Inc | Runner | Author | All views my own | #ArmServers
Geoff Langdale @geofflangdale
3K Followers 139 Following CMU CS PhD; Hyperscan chief; Intel Principal Engineer. Side projects include a superoptimizer. he/him
Halvar Flake @halvarflake
44K Followers 3K Following I do math. And was once asked by R. Morris Sr. : "For whom?" @[email protected] At the moment, for noone.
mdowd @mdowd
32K Followers 744 Following Internet Hacker. Founder of @vigilant_labs. Previously, co-founder of Azimuth Security (now L3Harris Trenchant)
Dylan Patel @dylan522p
39K Followers 685 Following SemiAnalysis Boutique AI & Semiconductor Research and Consulting DMs are open for consulting, quotes, or to talk shop
Saar Amar @AmarSaar
18K Followers 362 Following Reversing, exploits, {Windows, Hyper-V, *OS} internals, mitigations. Apple SEAR. Opinions are my own. @[email protected]
Saagar Jha @_saagarjha
4K Followers 174 Following
Daniel Lemire @lemire
21K Followers 1K Following Computer science professor at @TELUQ (Université du Québec, @ReseauUQ), programmer, blogger. @Nasorg👨💻
David Buchanan @David3141593
17K Followers 799 Following Reverse Engineering, cryptography, exploits, hardware, file formats, and generally giving computers a hard time. Occasional CTF player. Fedi: @[email protected]
brinly @brinlystorm
1K Followers 2K Following asking for real action on climate change. ex azimuth, now on a independent low level computering adventure... opinions can be blamed on @CimStordal.
Pierre H. 🔥🌸 @pedantcoder
4K Followers 188 Following present: security (zalloc, kalloc_type, IPC, VM, …) | past: GCD, synchro, objc_direct, perf… | timeless: 🇫🇷 snark | @[email protected]
Alex Plaskett @alexjplaskett
9K Followers 590 Following Security Researcher | Pwn2Own 2018, 2021, 2022, 2024 | Tweets about 0day, OS, mobile and embedded security.
Matteo Rizzo @_MatteoRizzo
2K Followers 590 Following Security engineer at @google, CTF player for @0rganizers and @polygl0ts Personal account. Mastodon: @[email protected]
Richard Johnson @richinseattle
16K Followers 3K Following Computer Security, Reverse Engineering, and Fuzzing; Training & Publications @ https://t.co/mloVP6rPB7; hacking the planet since 1995; Undercurrents BOFH
Jevin Sweval @jevinskie
2K Followers 5K Following KEYWORDS ➡︎ cats, hacking, reverse engineering, LLVM, binary analysis, side channel analysis, FPGAs, NFC/EMV tricks Previously Pay Security he/him
nedwill @NedWilliamson
16K Followers 499 Following Project Zero Researcher Discovered SockPuppet, Soundhax https://t.co/16vegpfPXc
Paul Khuong (pkhuong@.. @pkhuong
2K Followers 925 Following Failed dentist, causer of situations. Removing the stupid to make room for my own mistakes. Views are my own, etc., etc.
random @random06457
239 Followers 165 Following I like game reverse engineering and I like writing homebrews/modding tools (most of the time for the Nintendo Switch). Discord : random#6457
Daqwes @DaQWeS
52 Followers 382 Following
Mark Tinderholt @MarkTinderholt
665 Followers 371 Following The Azure Terraformer. Memelord. Azure, Terraform, and all things Cloud / DevOps. Software Engineer / Architect @Microsoft Opinions are my own.
Jonathan Klein @jonathanbklein
303 Followers 1K Following Founder & CEO of @Teknoir - Operational AI for the physical world | Former Cofounder & CEO of Cimation (acquired by NYSE: ACN)
Lucas @t0t0_l
48 Followers 2K Following
icytestnew @icytestnew87897
34 Followers 49 Following
Folkert de Vries @flokkievids
115 Followers 319 Following Programmer interested in functional programming and non-photorealistic rendering. Creator of the Freestyle SVG exporter
Filip @filippo_135
57 Followers 422 Following
Iglesias 👨🏻�.. @IgorIglesias5
133 Followers 873 Following 👨🏻💻Software Engineer #developer👨🏻💼Entrepreneur @agenciacamp @visie
HomoKubrickus @HomoKubrickus
66 Followers 3K Following
SlyFabi @SlyFabi140
42 Followers 65 Following
xdk78 @xdk78
55 Followers 2K Following pl/en, he/they, open-source enthusiast, art connoisseur, pixel art addict, over thinker. I like funny and cute animals. https://t.co/90ta0NP6wS
Jackzhao1999 @jackzhao1953912
14 Followers 35 Following
Özgür Özkurt @ozgur_ozkurt
6 Followers 83 Following
Ekita Hasegawa 📏 @HasegawaEkita
140 Followers 446 Following 28 | Engineer | VTuber? | I enjoy visualizing and communicating science
hantx @hantx1
75 Followers 970 Following
Alan Ster @AlanSter2
61 Followers 2K Following
Palkovics Adam @a_palkovics
101 Followers 929 Following
_ (aka PF, L) @AThe_Cw
9 Followers 46 Following
Chuang Yao @chuangyao
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reggie @retie002
34 Followers 94 Following
Daniel Hooper @DanielcHooper
8K Followers 217 Following Systems/Graphics Programmer I made @PrincipleApp Former @Apple Engineer on Camera & Photos
Masayuki@FPGA開発�.. @dev_msyksphinz
2K Followers 319 Following
Kuter Dinel @KuterDinel
127 Followers 633 Following 2022 SWE Intern at @Google . I like to tweet about things I learn, observe, and think
Yo era feliz @NadieQuintero
9 Followers 162 Following Messi, Patria y Familia. Israel y los israelís tienen sangre en sus manos. Palestina libre 🇵🇸
Kevin @Zeturic
1 Followers 431 Following
Daniel Lubarov @dlubarov
5K Followers 1K Following Working on Plonky2, Plonky3, and our zkEVM at @0xPolygonZero 💜
Alex @iurkxq
14 Followers 320 Following
Sam Ragsdale @samrags_
5K Followers 653 Following Investing and Engineering @a16z crypto, formerly @blockchaincap @google
ɐılnſ @bulkobubulko
29 Followers 461 Following
Yohei Kusakabe @yo__ohei
67 Followers 63 Following アメリカの銀行のシンガポールオフィスでLead Software Engineerしてます。ノーステキサス大よりジャズ学位持ってマス。 仕事はPython / GoでChaos Engineering ですが心は今Clojure / Rustです。低レイヤも好きでxv6が走るエミュレーター作ったりもします。
Boru Chen @blue75525366
54 Followers 90 Following I am currently a phd student at UIUC. Interests include System Security, Computer Architecture, and IoT/Mobile Security.
Shubham Roy @sys_roy
5 Followers 95 Following
Anxhelo Xhebraj @0xA95
150 Followers 577 Following PhD Student @PurdueCS ∩ @purdue_pl and ML Compiler Research Intern @NVIDIA. Previously Swift Performance Team @Apple.
Andrzej Warzynski �.. @_banach_space
189 Followers 234 Following Hacking compilers at Arm. Aspiring highlander. All opinions are my own.
Asahi Lina / 朝日�.. @LinaAsahi
30K Followers 132 Following Hello everyone, Asahi Lina here! I'm a Linux developer VTuber! EN/日本語｜🎨 #AsahiLinArt｜Model @NananoNanase｜Design @shiranui_illust
Catherine @whitequark
29K Followers 427 Following ~gone. find me on mastodon dot social, cohost, and bluesky, same username
Longhorn @never_released
14K Followers 130 Following Kernel/hypervisor engineer @awscloud EC2. Hobby @checkra1n. Mastodon: https://t.co/DsXP8PFgL0 Bluesky: https://t.co/dAOfFSSqY4
Jon Masters 🏴�.. @jonmasters
13K Followers 7K Following Troublemaker | Computer Architect | @Arm Servers Architect @Google | Previously @RedHat, @Nuvia_Inc | Runner | Author | All views my own | #ArmServers
Halvar Flake @halvarflake
44K Followers 3K Following I do math. And was once asked by R. Morris Sr. : "For whom?" @[email protected] At the moment, for noone.
mdowd @mdowd
32K Followers 744 Following Internet Hacker. Founder of @vigilant_labs. Previously, co-founder of Azimuth Security (now L3Harris Trenchant)
Yarden Shafir @yarden_shafir
19K Followers 273 Following A circus artist with a visual studio license
Saar Amar @AmarSaar
18K Followers 362 Following Reversing, exploits, {Windows, Hyper-V, *OS} internals, mitigations. Apple SEAR. Opinions are my own. @[email protected]
Saagar Jha @_saagarjha
4K Followers 174 Following
InstLatX64 @InstLatX64
3K Followers 0 Following x86/x64, SIMD, #AVX512, "Aha!" moments. I have been writing code since 1986.
Tim Misiak @timmisiak
7K Followers 281 Following OS/systems engineer, co-founder of @augmendtech. I used to work on WinDbg at Microsoft. On bluesky: @timdbg.com On mastodon/fediverse: @[email protected]
David Buchanan @David3141593
17K Followers 799 Following Reverse Engineering, cryptography, exploits, hardware, file formats, and generally giving computers a hard time. Occasional CTF player. Fedi: @[email protected]
neural oscillator of .. @mycoliza
19K Followers 1K Following 𓃭𓇋𓊃𓄿𓁐 • manic kernel dream girl • putting computers inside other computers at @oxidecomputer • @tokio_rs core team • nulla crux, nulla corona
brinly @brinlystorm
1K Followers 2K Following asking for real action on climate change. ex azimuth, now on a independent low level computering adventure... opinions can be blamed on @CimStordal.
Pierre H. 🔥🌸 @pedantcoder
4K Followers 188 Following present: security (zalloc, kalloc_type, IPC, VM, …) | past: GCD, synchro, objc_direct, perf… | timeless: 🇫🇷 snark | @[email protected]
Chips and Cheese @ChipsandCheese9
6K Followers 0 Following If you would like to reach out, feel free to email us at [email protected] Mastodon: https://t.co/gNwRTQEgaA
stacksmashing @ghidraninja
47K Followers 430 Following Security researcher with a focus on hardware & firmware. I occasionally publish stuff on YouTube. Co-founder of @hextreeio. Contact: [email protected]
Richard Johnson @richinseattle
16K Followers 3K Following Computer Security, Reverse Engineering, and Fuzzing; Training & Publications @ https://t.co/mloVP6rPB7; hacking the planet since 1995; Undercurrents BOFH
web3 is going just gr.. @web3isgreat
130K Followers 1 Following tracking only some of the many disasters happening in crypto, defi, NFTs, and other blockchain-based projects since 2021 • created by @molly0xfff
Nat Brown @natbro@mas.. @natbro
5K Followers 893 Following now: apple, formerly:VR @ Valve , past:@TheTileGame, rel8tion,facebook; music & mobile @myspace; cto, @ilike; startups; microsoft:xbox/activex/clr/com/ole/mspub
Jevin Sweval @jevinskie
2K Followers 5K Following KEYWORDS ➡︎ cats, hacking, reverse engineering, LLVM, binary analysis, side channel analysis, FPGAs, NFC/EMV tricks Previously Pay Security he/him
Arina Neshlyaeva @ArinaNeshlyaeva
206 Followers 65 Following ISPC maintainer @Intel. All opinions are my own. she/her
Azeria @Fox0x01
125K Followers 571 Following Sneaky bit flipper | CEO of @azeria_labs | Arm Assembly Princess | Trainer | Author of @BlueFoxBook |
Madison | Suop @suuuoppp
102K Followers 686 Following pro puzzler, YouTuber/streamer, keycap enthusiast, creative icon. (she/they)🇨🇦 bsns contact: [email protected]
inigo quilez @iquilezles
47K Followers 40 Following * Math & art. Product Manager. Demoscener. * Created Quill, Shadertoy, Pixar's Wondermoss, Memix, ... * Videos: https://t.co/r50AVR0ITo * Tutos: https://t.co/MVjsGVRH5s
Ronak Singhal @rsinghal1
1K Followers 2K Following CPU architect. Intel Senior Fellow. CMU alumnus. Pittsburgh in the blood.
derek guy @dieworkwear
844K Followers 963 Following Menswear writer. Editor at @putthison. Creator of @RLGoesHard. Bylines at The New York Times, The Washington Post, The Financial Times, Esquire, and Mr. Porter
Cheese @System360Cheese
666 Followers 185 Following A Tasty Slice of Cheese that is the Editor in Chief of Chips and Cheese who now has a B.S. in Physics All opinions are my own
Alexander Yee @Mysticial
878 Followers 99 Following Computers, HPC, and Anime... Author of y-cruncher.
Emily Young @EmilyAYoung1
156K Followers 121 Following Writer & Benchmarker at @LinusTech. My name is Emily, I come from Newfoundland, and I write about things. Arch Linux user. Opinions my own. She/Her 🏳️⚧️
Tom 7 @tom7
8K Followers 384 Following lexicographic NES AIs, alphabetical star wars, video games, fonts, album-a-day, expert mode running, chiptune, programming languages, etc.
Tim Davison @timd_ca
4K Followers 773 Following Building @CellWalkApp – immersive biology education. Graphics programmer. PhD. #swiftlang https://t.co/vyilh8pk53
Pietro Borrello @borrello_pietro
3K Followers 602 Following Security Researcher | PhD Alumn at @SapienzaRoma | Pwner at @TheRomanXpl0it and @mhackeroni | https://t.co/g77o9Ojdjf
ibireme @ibireme
738 Followers 50 Following
Marcin Juszkiewicz �.. @haerwu
951 Followers 77 Following I am known for being sarcastic and lacking empathy (like at all). Opinions are my own etc. @[email protected] if you do Mastodon.
Blacktop @blacktop__
1K Followers 589 Following
🌏🔎Leigh Alexand.. @leighalexander
129K Followers 3K Following Story, games, procgen, bad futurism, spooky AI. Reigns: Her Majesty/Game of Thrones, Love Island, Neo Cab, Neurocracy &. Everything is narrative design. she/her
Brenda L Romero @br
473K Followers 1K Following By day: Studio Director @romerogamesltd By night: Writer. PhD @TCDEnglish. Words: @TheDublinReview @TOLKA @StingingFly @TNOlitmag Speaking: [email protected]
Laia Bee (ⓛ ω ⓛ).. @Laiabee
3K Followers 3K Following @pincergames co-founder/ President of the Uruguayan Gamedev Association @Cavi_uy / #1reasontobe organizer /@latamVGF Coord/ #thegameawards Future Class/ She/Her
Best of Dying Twiter @bestofdyingtwit
108K Followers 3 Following Looking into it. Chief Looker: @jenntakahashi
𝚊𝚕𝚔𝚊𝚕�.. @alkalinesec
3K Followers 545 Following mobile security / symbolic execution. opinions are mine. @[email protected] . he / him
Arthur Thiele @arthurbthiele
6 Followers 44 Following
Oliver Hunt / @ohunt@.. @ohunt
3K Followers 326 Following Privacy is a fundamental human right. Not being beaten or killed by the police is a fundamental right. Protesting is a fundamental right. He/him.
CF Bolz-Tereick @cfbolz
3K Followers 1K Following PyPy/RPython contributor. Half time teaching at Uni Düsseldorf. Works on dynamic language implementations. Vegan. they/them Mainly on @[email protected]
riku @rikunow
77K Followers 234 Following ミニチュアダックスと暮らしてます。趣味は動物園巡り。撮影はほとんどソニーα1。ユキヒョウとトラが好きです。お蔵入り写真は@RikuLiteで投稿中。
Alexandre Mutel ▶ h.. @xoofx
5K Followers 327 Following I'm no longer using Twitter, please go to Mastodon.
BobbyBroccoli 🤠 @BobbyBroccole
16K Followers 413 Following howdy, I do youtube videos (he/him) I'm also on @watchnebula Patreon: https://t.co/WZCptt3prb
James Greenhalgh @jamesgreenh
264 Followers 248 Following I lead teams that make Arm’s Neoverse products great. Director, Software Product Management for infrastructure markets. Comments my own, not Arm representation
zoro respecter @myspace4dogs
204 Followers 320 Following bright eyes & neopets elitist • putting strings where there shouldn’t be • they/them
fclc @FelixCLC_
1K Followers 1K Following Little fella standing on the shoulders of giants TLDR 🇨🇦/🇫🇷🧑🏼💻🏎️🧗♂️ 💩posting. Haver of opinions that are all my own #HPC #AVX512 #BLAS #SME #SVE
Will Lovett @hpc_will
512 Followers 552 Following Technology Manager at Arm, mostly around compilers. He/him. Tweets are my own. Also over here: @[email protected]
Regional American Foo.. @RegionalUSFood
174K Followers 4 Following Shining a light on regional dishes from around the US since 2021 — featured in @Salon, @SFExaminer, @AtlasObscura, and more. Curated by @bromf3. Submit via DM
Filip Hráček @filiphracek
32K Followers 615 Following I explain difficult things to smart people. Separately, I also make games and useful little software projects (https://t.co/LnvSFrG2Uc). Also @[email protected].
Santosh Nagarakatte @santoshgnag
1K Followers 566 Following Professor and undergraduate program director, Computer Science, Rutgers University, New Brunswick. See my group RAPL: https://t.co/dYChac4veQ
Chris "" Eberly @chriseberly
620 Followers 610 Following
Moonchild @moon_chilled
48 Followers 35 Following halimede but transactional memory \\ @[email protected] black market in-band signal vendor \\ still herding graphs into queues
Pierre Bourdon (@delr.. @delroth
4K Followers 721 Following Left Twitter. Find me on Mastodon: @[email protected]
Hans Wennborg @hansw2000
455 Followers 379 Following I like to program computers. @[email protected]
Adenilson Cavalcanti @adenilsonc
184 Followers 354 Following Programmer, Web engines, Linux and opensource stuff. Tweets are my own. Mastodon: https://t.co/jT2bQk4dR0Incorporate real Apple devices into your continuous integration systems for running tests, capturing logs, and other automation? Xcode 15 includes devicectl, a really handy tool. Read through `xcrun devicectl device process launch --help`
Image: The reality Video: the parody 2 years ago youtube.com/watch?v=S0WWbp…
@FelixCLC_ @dss_gabriel However, some of ICX's opts are vendor-locked behind their /Qx flags which blocks running on AMD. I estimate a 0% chance I can convince Intel to unlock those since they're getting their ass hammered on the hardware side and can use whatever help possible to prop up their chips.
@FelixCLC_ @dss_gabriel ICX has a LOT of problems related to perf. Fortunately, Intel has re-engaged me now and are working on it. Though it'll probably be years before it will reach ICC's perf. Once they fix current set of regression examples, I'll prepare the next set for them to work on. 😅
cannot wrap my mind around how someone can fuck up understanding 4’33” like this and be a university professor
‘the protests are robbing my Columbia students of listening to John Cage’s 4’33, the piece of music that is explicitly designed to force you to listen to…what’s around you.’ absolutely perfect
@dougallj @stephentyrone I don't really care about the left other than to show the CPU is better with small work sizes, because of the startup overhead. At 7168x7168, a single matmul call already takes nearly 4 seconds, so startup/synchronization overhead should be negligible compared to execution time.
This is the graph of a function something like kx^3/(C+x^3), where we're still way down on the ankle of the graph amortizing the synchronization cost C, and haven't come close to the plateau before we run out of some critical resource (TLB? memory?) and nosedive.
An anonymous* friend inspired me to spend some time this weekend re-reading the classics
OK look, if I hear about one more f-ing cat food recall, I swear to kutaragi I’m learning how to make my own cat food and single handedly preparing every one of Cosmos and Neutrino’s meals from scratch like some kale-eating Whole Foods-shopping organic yoga teacher
For new followers, this two minute video is of course my greatest work to date, but be warned, it was posted April 1, 2015: youtube.com/watch?v=2vnTti…
@Helios748 I'm not even upset, it brings me joy now.
Update: they did it, they really did it! The top surface arrived chipped and cracked, however, so we are now waiting for a replacement. The saga continues!
That's a fun first item on the list :D
@never_released WGSL follows the IEEE-754 standard for floating point computation with the following differences: • An implementation may produce incorrect results.
What do you want to bet at least some implementations, even with this leeway, do chop rounding without computing low product bits and can have > 1 ulp error?
@Sneakyness They can’t define reasonable semantics, because otherwise you’d be able to track people, but you can track people anyway, so … what was the point again?
"great reach comes great responsibility." ^ IMO, your responsibility is to your readers and viewers. You are there to help them make better choices. Your responsibility is not to brands. That is the job of PR people and marketers.
Disagree. Too much "reporting" nowadays is little more than rehashed press releases and flattery to gain more access to brands. I don't like content creators whose whole schtick is tearing stuff down but STRONGLY appreciate informed people giving honest opinions.
I find it distasteful, almost unethical, to say this when you have 18 million subscribers. Hard to explain why, but with great reach comes great responsibility. Potentially killing someone else’s nascent project reeks of carelessness. First, do no harm.
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