kev009

42 ms·

571.
by kev009 8y ago
With CAPI (cache coherent interconnect) I don't see why you couldn't do this in a more open way. i.e. optane, HBM2, whatever comes next
572.
by kev009 8y ago
You can validate pricing on https://www.raptorcs.com/content/base/products.html . I am one of the first buyers with a dual 22 core system, so I'd be happy to run any numeric benchmarks if people have ideas. B
573.
by kev009 8y ago
These seem pretty insane, you'd be better off with two POWER9s in just about any dimension including cost, TDP, thread count, cache, memory bandwidth, I/O bandwidth including PCIe lanes, FLOPS and integer performance.
574.
by kev009 8y ago
You state this as if I didn't so I'm confused by that :S. Regardless it is possible to do a full build for under $2k, especially if you have any resuable parts like case/psu/nvme.
575.
by kev009 8y ago
Check the link in my original post and the child comment. You can buy DDR4-R and NVMe cheaply from places like Superbiiz. Here is the special DD2.1 box https://secure.raptorcs.com/content/TLSDS1/intro.html for $1
576.
by kev009 8y ago
Huh? It's under $2k for a daily drivable config. $1600 if you are willing to do a 2.1 rev chip without HW speculative execution mitigations and some other errata.
577.
by kev009 8y ago
The one you want https://www.raptorcs.com/content/TL1BC1/intro.html Open source and toolchain and access and validation turtles all the way down https://git.raptorcs.com/git/
578.
by kev009 8y ago
The one BSDish distro with an easy GUI installer and desktop friendly settings was TrueOS which is undergoing a metamorphosis at the moment. For the most part you can just hit enter through the installer for any of them and have a working s
579.
by kev009 8y ago
I used it in production along together with Linux at a startup as it was a fairly robust Xen guest circa 2008-11. I was having a ton of stability issues with CentOS and Fedora DomU on PV Xen with CentOS 5 as the dom0. For some reason NetB
580.
by kev009 8y ago
NetBSD was my first BSD and OS development experience in my teens. I'm fairly entrenched in the FreeBSD camp for commercial reasons now after a very long run as a Linux user, but there is some nice security stuff in here and happy to
581.
by kev009 8y ago
Ok, I can see where you're coming from. You are wishing a standing president would do a good thing. It's a nuanced way to form an argument or ideal because the leaders have become so politically charged (imagine trying to promot
582.
by kev009 8y ago
This is such a contrasting comment I am curious if you remember how you consumed information back then to i.e. develop admiration for the whistleblowers, and retain the political operative narrative that Obama was somehow sympathetic and go
583.
by kev009 8y ago
As a kind of thought experiment I wonder how being the new "owner" of this would be anything other than a terrible curse. It's not really useful in any way to most people so you probably decide to hawk it. You have the full
584.
by kev009 8y ago
One piece of fun trivia, Patrick works for iXsystems so Slackware and FreeBSD are happy siblings.
585.
by kev009 8y ago
Con Kolivas' schedulers have had a loyal following among some desktop users http://www.users.on.net/~ckolivas/kernel/
586.
by kev009 8y ago
It doesn't really hurt anything, especially with Apple's purchasing power. The "pro" in there means something to a lot of people, if you are doing a live DJ set and your laptop crashes it can be catastrophic for instanc
587.
by kev009 8y ago
Wonder why they wont put the xeon in there with ECC. Lenovo P50/P51 are still my choice.. 2x nvme, ECC, 4k color corrected, undeniably superior keyboard
588.
by kev009 8y ago
Great post! One nice thing about having the data path in kernel is that you aren’t context switching to userspace and back, nor doing the associated copyin/copyout to move data between address spaces. This can be further leveraged to
589.
The Battle of the Schedulers: FreeBSD ULE vs. Linux CFS [pdf](usenix.org)
90 points by kev009 8y ago|14 comments
590.
by kev009 8y ago
The tech industry is unwell, in our case despite abundant cashflow it's based in the completely irrational. Your salary would be a full 10-20% higher with average turnover numbers if it weren't wasted on modern tech recruiting pra
591.
by kev009 8y ago
:) there are a lot of awful managers in tech, I tried hard not to be one of them. A good first level manager in my opinion should remain a strong individual contributor to the team. It's important to have prudent knowledge of the syst
592.
by kev009 8y ago
Most of what I'm doing is systems engineering. Incorporating research and code from others. Reporting and occasionally fixing bugs. The research in this case is primarily coming from Google. Linux has the state of the art TCP stack
593.
by kev009 8y ago
Behind the scenes, this has been a big boon for CDNs, my work is powering Amazon, and it is interestingly derived from work from Netflix on FreeBSD TCP. Together we are making TCP work much better on these largely wireless networks.
594.
by kev009 8y ago
It works fine. jemalloc is the system malloc on FreeBSD.
595.
by kev009 8y ago
Yep, this two layer approach is also desirable since in userspace you aren't context switching to the kernel all the time and can make some assumptions to avoid certain locking and external fragmentation with the kmem. Short lived all
596.
by kev009 8y ago
I think this is a really hard thing to generalize, the broader an attempt would be likely to make mistakes and casual readers would overlook a lot of context sensitive information (OS, OS version, CPU ISA and particular uarch, configuration
597.
by kev009 8y ago
That RFC is older than me. I've spent the last few years working full time on TCP at a CDN. Giant, shoulders, et al. Thanks!
598.
by kev009 8y ago
This isn't really an accurate portrayal of massively used protocol authors. People like Randall Stewart (SCTP, Netflix FreeBSD TCP RACK/BBR), Van Jacobson (TCP congestion control, Google BBR), Neal Cardwell, Yuchung Cheng (TCP RA
599.
by kev009 8y ago
QUIC is kind of like a relaxed TCP over UDP. You can do SCTP over UDP (aka WebRTC), and TCP over UDP to gain those application-managed benefits with varying upper level trade offs. SCTP has pretty wide support, but it's kind of like a
600.
by kev009 8y ago
It's used in SIGTRAN/SS7 so just about any phone call, cell session etc is sctp. As an aside rrs, the primary author of spec, book, and reference implementation, still occasionally works on the FreeBSD sctp and has recently rewri

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