Viewing profile — eklitzke

Most of the training cost is not in the final training run, it's in all of the R&D (including salaries, equity, etc.) that it takes to get to the final training run. The actual cos…

A well run public transit system should obviously be cheaper at scale than robotaxis, but the incentives for Waymo (or Uber, or Lyft, etc.) are very different than the city's incen…

Yeah, none of this makes sense to me. Allocating memory for stack space is not expensive (and the default isn't even 1MB??) because you're just creating a VMA and probably faulting…

I can't speak to what every team at Google does, but there are machines with Nvidia GPUs in Borg. However Google charges orgs internally for cpu/memory/gpu/tpu usage and TPUs are *…

This is true but the relative overhead of this is highly dependent on the protobuf structure in one's schema. For example, fixed integer fields don't need to be decoded (including …

Pretty much all of the history of HN front pages, posts, and comments are surely in the Gemini training corpus. Therefore it seems totally plausible that Gemini would understand HN…

I think it's important to point out the distinction between what POSIX mandates and what actual libc implementations, notably glibc, do. Nearly all non-reentrant POSIX functions ar…

NUMA has a huge amount of overhead (e.g. in terms of intercore latency), and NUMA server CPUs cost a lot more than single socket boards. If you look at the servers at Google or Fac…

A few reasons, I think. The first is that getaddrinfo is specified by POSIX, and the POSIX evolve very conservatively and at a glacial pace. The second reason is that specifying a …

I agree. If you actually know what you're doing you can use perf and/or ftrace to get highly detailed processor metrics over short periods of time, and you can see the effects of t…

Writing drivers is easy, getting vendors to write *correct* drivers is difficult. At work right now we are working with a Chinese OEM with a custom Wifi board with a chipset with f…

From what I could tell from the article and the linked videos the innovation here is that it essentially lets you serve the shuttlecock while it's facing the wrong direction. Norma…

Yeah if you were really trying to make things fast you'd have the compute and NFS server in the same rack connected this way. But you aren't going to get this from any cloud provid…

NFS can be super fast, in a past life I had to work a lot with a large distributed system of NetApp Filers (hundreds of filers located around the globe) and they have a lot of fanc…

This is vastly oversimplifying the problem, the difference between IPv4 and IPv6 is not just the format of the address. Different protocols have different features, which is why th…

I don't understand why they say that reference counting is "slow". Slow compared to what? Atomic increments/decrements to integers are one of the fastest operations you can do on m…

Just to expand on this, since it wasn't originally clear to me from reading your post, the contact privacy feature is about using SGX enclaves for the purpose of populating your kn…