Hacker News: davidlt

New comment by davidlt in "GLM-5.3: Frontier coding with emergent cyber capabilities"

davidlt — Fri, 14 Aug 2026 09:24:16 +0000

It's the same pre-training, they are just adding more (+ better) SFT, RL, etc. (post-training). Model internal knowledge cut-off is still the same.

It seems we are doing pre-training every 6 months, and post-training every 4-8 weeks now.

New comment by davidlt in "DeepSeek V4 Pro 0813"

davidlt — Wed, 12 Aug 2026 18:53:00 +0000

I just wanted to emphasize this. Harness is a big part of how things perform thus usually it's harness + model co-design that's important.

AMD Publishes Open-Source Driver for GPU Virtualization, Radeon "In the Roadmap"

davidlt — Thu, 24 Apr 2025 06:58:05 +0000

Article URL: https://www.phoronix.com/news/AMD-GIM-Open-Source

Comments URL: https://news.ycombinator.com/item?id=43779953

Points: 196

# Comments: 61

New comment by davidlt in "Poland fumes over US block on AI chips"

davidlt — Tue, 21 Jan 2025 12:48:37 +0000

This isn't a problem. See article [EN][0]. Simply put we are significantly below the cap. If somehow we would manage to hit the cap it definitely should be an alarm for investigation. I feel more folks are unhappy because EU was divided into two parts with this.

[0] https://www.lrt.lt/en/news-in-english/19/2461209/will-lithua...

New comment by davidlt in "Linux 6.11 Released"

davidlt — Sun, 15 Sep 2024 19:11:46 +0000

I am really surprised with RNDA3 support. I have never seen so many issue with iGPU (APU). It started with VP9 decoder issue (e.g. just playing videos on YouTube was enough to trigger it), but that got fixed after a very long time (required a new firmware). Multiple constant [different] crashes, but you can workaround most of them by adding amdgpu.sg_display=0 to your bootargs. It's already listed in Arch Linux wiki, Gentoo wiki, etc.

Again, I was surprised by the number of firmware and driver issues since RNDA1/2/3 have been around for years now.

New comment by davidlt in "Lichee Console 4A – RISC-V mini laptop: Review, benchmarks and early issues"

davidlt — Tue, 16 Jan 2024 11:10:59 +0000

+1 on your initial comment. Exactly how I feel about the current situation.

MilkV Oasis with SG2380 would be the end-game for majority of developers, but they are definitely loosing money if they keep starting price at 120 USD. They don't have it frozen (they changed the SoC specification some weeks ago) thus I wouldn't be surprised to see this slip into 2025. I wouldn't be surprised if this outperforms MilkV Pioneer.

New comment by davidlt in "Is RISC-V ready for HPC? Evaluating the 64-core Sophon SG2042 RISC-V CPU"

davidlt — Sun, 10 Dec 2023 15:08:43 +0000

To my understanding SiFive continues to offer their selection of core IP. Anyways, I would assume any existing contract would have to be fulfilled for various legal reasons.

SG2042 itself is T-HEAD C920 design which is a mess, and might not be even called a RISC-V compliant design. We are kinda stuck it existing and being used in various chips. There are other design issues discovered IIRC (atomic might not work properly [at least on the kernel side workarounds required]; floating point failures in glibc testsuite because FP not being compliant). SG2044 is scheduled for the next year (2024). Not many details are known: 64 cores, 8 DDR controller, 3x memory bandwidth, vector v1.0 support, 2x PCIe (unknown what that means, Gen3 -> Gen4? More lanes?). The cores are unknown, but SG2038 is SiFive P670. T-HEAD has C908 that support vectors v1.0 (and solves some other issues), but that's a smaller core. Not a replacement for C910/C920.

New comment by davidlt in "RISC-V SBC VisionFive 2 Officially Shipped"

davidlt — Wed, 11 Jan 2023 17:42:03 +0000

Upstreasming status: https://rvspace.org/en/new-page/JH7110_Upstream_Plan

StarFive Tech. have been upstreaming on kernel, OpenSBI and U-Boot from several weeks now. Of course this is still weeks/months away (if not more, for all the features) from landing in stable releases. Even more for distributions to pick those up.

New comment by davidlt in "Intel completely disables AVX-512 on Alder Lake after all"

davidlt — Fri, 07 Jan 2022 13:55:00 +0000

It could be that decision to not support AVX512 was made very late in product development and thus early batches didn't have chicken bit disabled or/and fused it off.

There might be gazillions of reason why this was done.

New comment by davidlt in "HiFive Unmatched – A RISC-V Linux development platform"

davidlt — Fri, 10 Sep 2021 13:08:29 +0000

Zba, Zbb, Zbc, Zbs (BitManip) have been approved by "Architecture Review" thus I assume they close to being ratified. Probably one of the first new extensions to be available for RISC-V.

Because it's not ratified the BitManip extensions are not listed in any RISC-V Profiles as supported (or required). Platforms specification is also not requiring it.

Note that the next Profiles will be for 2022, thus any extension ratified before that most likely will appear in a new profile (i.e. as supported, non-conflicting extension) in some set.

New comment by davidlt in "HiFive Unmatched – A RISC-V Linux development platform"

davidlt — Fri, 10 Sep 2021 12:55:53 +0000

There are Profiles specs and Platforms specs, that will be regularly updated. This means software has a fixed target on which it can depend.

New comment by davidlt in "HiFive Unmatched – A RISC-V Linux development platform"

davidlt — Fri, 10 Sep 2021 12:29:04 +0000

I am running RX 570 with PCIe + 6-pin connector for the power. These works out-of-the-box due to open source drivers. Older Nvidia cards work too, but you would need to go with older cards as you need Nouveau driver. I believe someone recently used AMD RX 6700XT, which is a bit insane.

The bottleneck here is SoC, not the GPU. With HW decoding on the GPU I can play 4K 60fps trailers on Unmatched just fine.

New comment by davidlt in "XuanTie C906 based Allwinner RISC-V processor to power $12 Linux SBC's"

davidlt — Mon, 09 Nov 2020 12:24:52 +0000

For the price point they are going it's plenty enough. That's also enough to boot Linux distributions in headless mode.

New comment by davidlt in "XuanTie C906 based Allwinner RISC-V processor to power $12 Linux SBC's"

davidlt — Mon, 09 Nov 2020 12:22:24 +0000

IIRC Allwinner has already sent some patches related to RISC-V to kernel and also suggestions to SBI specification. So far the beginning is good. Remember that they are using IP from Alibaba. Alibaba might as well work on upstreaming, etc. efforts for this (speculation).

New comment by davidlt in "XuanTie C906 based Allwinner RISC-V processor to power $12 Linux SBC's"

davidlt — Mon, 09 Nov 2020 12:20:24 +0000

06:34PM EDT - Q: plans to support RVV 1.0? A: 0.7.1 for now - when we designed, it was still at that level. We are following and working on that yes.

From https://www.anandtech.com/show/15991/hot-chips-2020-live-blo...

0.7.1 and 1.0 will not be compatible IIRC thus Linux distribution most likely will not support RVV on this.

Intel Releases Thunderbolt 3 Protocol (royalty-free) [base for USB 4]

davidlt — Mon, 04 Mar 2019 14:59:28 +0000

Article URL: https://newsroom.intel.com/news/intel-takes-steps-enable-thunderbolt-3-everywhere-releases-protocol/

Comments URL: https://news.ycombinator.com/item?id=19301733

Points: 3

# Comments: 0

New comment by davidlt in "RFC 7858: DNS over TLS (2016)"

davidlt — Tue, 10 Apr 2018 14:24:25 +0000

Yesterday I decided to configure unbound on fresh Fedora 28 Beta install and configure it to use DNS-over-TLS to Cloudflare and Quad9. unbound runs as local recursive resolver. Within a laptop it's decrypted, but all outside communications are over TLS (checked with wireshark). The 1st query for unknown domain is slow, ~300-1000 ms, but afterwards it always report 0ms. unbound in background should automatically update those record in the cache. So far works with no problems noticed.

New comment by davidlt in "HiFive – RISC-V-based Linux development board"

davidlt — Sun, 04 Feb 2018 09:34:10 +0000

We are working on Fedora RISC-V.

FOSDEM 2018: Major SiFive Reveal in less than 12 hours (RISC-V)

davidlt — Sat, 03 Feb 2018 05:46:38 +0000

You may have noticed a flurry of activity at SiFive over the past few days, or seen a tweet [0] or two [1] alluding to secretive and mysterious activity from Palmer and Yunsup! Here are the facts:

Palmer and Yunsup are, in fact, in Belgium at the moment 1. The FOSDEM Conference is also in Belgium (Coincidence?) 2. Both Palmer and Yunsup are enthusiastic Quake players 3. RISC-V gossip circles are abuzz like never before 4. What does it all mean?

Tune in to the livestream of our upcoming presentation to find out! Saturday, 8am PST / 11am EST - Exactly 18 hours from now

Livestream: https://live.fosdem.org/watch/k1105

More: - https://fosdem.org/2018/schedule/event/riscv/ - https://fosdem.org/2018/schedule/event/riscv_bof/

- - -

[0] https://twitter.com/SiFiveInc/status/959235164571389952 [1] https://twitter.com/SiFiveInc/status/959085220510171141

Comments URL: https://news.ycombinator.com/item?id=16296381

Points: 1

# Comments: 0

New comment by davidlt in "The new microcode from Intel and AMD adds three new features"

davidlt — Wed, 24 Jan 2018 08:13:20 +0000

IIUC, a limited number of people from kernel community knew about this and NDAs didn't exactly allow all the parties work together. The first solutions/mitigations exist (might not be nice), but now embargo is lifter and the communities (incl. companies) can work on better solutions together.