@fd_ripatel

x86 and black metal. retard in motion

 Chicago
Joined June 2024
  • Tweets204
  • Following99
  • Followers418
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ripatel ✠ retweeted
HSVSphere
@HSVSphere10h
"We disabled PIE on nodejs for a 0.3% perf win on an obsolete register-starved architecture that is used by nobody"
Robert Chen
@NotDeGhostOct 25
Replying to @julianor
nodejs linux official builds are no-pie by default for perf reasons. some distributions like debian/alpine rebuild node, which can enable pie here's a tracking issue for it: github.com/nodejs/node/issue…
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Ok China might win
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The only way out is hardware sovereignty. War on closed models xitter.cf/fd_ripatel/status/2110…
ripatel ✠
@fd_ripatelOct 14
I love you @intel. 16x Intel Gaudi2 HL-225 bedroom setup. Totaling 1.5TB HBM2e with 38.4TB/s memory bandwidth. Perfect for GLM and Qwen. 38.4Tbps bisection bandwidth on UBB, 2.4Tbps QSFP-DD scaleout. Total cost less than 2x RTX PRO 6000.
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Pour ceux qui n’ont pas compris : Dans 5 ans ils vont defoncer les portes d’immeubles et entre chez vous pour vous tuer vous et votre famille
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ripatel ✠ retweeted
Vash 🌪️
@VashkiritOct 17
Je veux un dictateur, j’en ai marre de la démocratie. Je veux un type qui aura les burnes d’enfin faire régner l’ordre et qui traitera enfin les traîtres à la nation comme ils le méritent.
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ripatel ✠ retweeted
MingJie@mingzhijie1942Oct 17
tank physics #Blockbench #minecraft
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ripatel ✠ retweeted
Intel
@intelOct 14
Replying to @fd_ripatel
We 💙 you and your build!
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x86 CET-{IBT,SS} coming to Linux {KVM,PL0,PL3}! Kernel shadow stacks are the final battle. x86 FRED helps by removing hell like IDT nested NMIs. Fighting with ERETU to 32-bit compat mode now. arm64-level control flow security on x86 soon.
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I love you @intel. 16x Intel Gaudi2 HL-225 bedroom setup. Totaling 1.5TB HBM2e with 38.4TB/s memory bandwidth. Perfect for GLM and Qwen. 38.4Tbps bisection bandwidth on UBB, 2.4Tbps QSFP-DD scaleout. Total cost less than 2x RTX PRO 6000.
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Wiwynn chassis with MegaRAC SP-X BMC. Unmodded, the fans run at 20k RPM and consume >1kW power. But hacked BMC, it's so quiet, I sleep next to it! It shall keep me cozy during Chicago winter.
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Good: - RoCE interconnect - fast HBM and SRAM streaming - fat systolic arrays for GEMM (BF16) -> amazing for dense models Bad: - fixed pipeline hardware ABI 😭 - underpowered VLIW cores for non-linear math - mem gather (shallow load queue) -> no good for DeepSeek CSA
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ripatel ✠ retweeted
trent.sol
@trentdotsolOct 1
yo! they added a trent persona
μck ٤:
@JustMicrockOct 1
gpt 6.1 sol is quite pleasant to use
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Firedancer Testnet on a SpacemiT K3 👾 (8x "X100" RVA23 cores @ 2.4GHz)
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ripatel ✠ retweeted
manofdutch@manofdutchMay 26
Replying to @sniffalt
Finished a cool map! Based of metro 2033!
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Linux 7.0 still does not support Intel CET indirect branch tracking (IBT) in usermode. Intel CPUs supporting IBT first appeared in 2021. Here's my patch series: lore.kernel.org/lkml/2026051…
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IBT enforces that indirect calls and jumps can't land on any arbitrary instruction, but one of these: [f3 0f 1e fa] endbr64 "jmp rax" to elsewhere causes a segfault SEGV_CPERR, defending against control flow hijacking (e.g. corrupt function pointer).
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This came up while adding control flow integrity to Firedancer's sandbox. One of the best Linux x86 jails out there, enforcing process isolation, namespaces, strict seccomp, landlock, MPK (user protection keys), CFI, and soon more. github.com/firedancer-io/fir…

IBT and shadow stack support by ripatel-fd · Pull Request #9791 · firedancer-io/firedancer

Update all compile units in Firedancer to support IBT and shadow stack. IBT attempts to prevent hijacking of indirect call / jmp, and shadow stack hardens against ROP attacks. Add a fd_shstk API fo...

github.com
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Frohe Ostern! 🕊️🐣✝️
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Today we revived Richie's old blog, bpf.wtf. We'll be pushing a few PRs to add the new syscalls and keep it up to date. To this day, it's still one of the best resources for learning sBPF Assembly. No more Wayback Machine! Compiler disrespecters rejoice!

BPF.WTF — The Archived Works of Richard Patel

Archive of Richard Patel's Solana BPF assembly articles covering the SBF instruction set and Sealevel syscalls.

bpf.wtf
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Never lose your soul
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