gnufx

78 ms·

841.
by gnufx 6y ago
If you're doing combinator parsing, the offside combinator is a few lines. I have one in front of me as part of a demo Haskell-like syntax for Scheme as a command processor. You have to tag the lexemes with position information, but
842.
by gnufx 6y ago
I'm skeptical of anything with connexions to the wrong university. ["the universities ... both of them" -- Sir Humphrey Appleby]
843.
by gnufx 6y ago
> the requirement to be able to log from pretty much anywhere can lead to messy code Ah, Milewski's example of insight from the supposedly useless mathematical stuff: https://bartoszmilewski.com/2014/12/23&
844.
by gnufx 6y ago
Why should you have to use Prometheus? There are plenty of options, and good reasons why you might want to push data rather than pull. Measurements should minimize perturbation of the system being measured, and the (computer) system gener
845.
by gnufx 6y ago
I never see an important system management principle brought up: If you get a user complaint (for some value of "user") and not an alert, you should fix the monitoring system so that you don't get another occurrence of it or
846.
by gnufx 6y ago
Contra is now pretty popular amongst folkies in the UK (well, England, anyway). Ceilidh (around the UK) is the wander-in-and-give-it-a-go thing, less taxing and more energetic than contra, and should be very welcoming and age-blind. (Less
847.
by gnufx 6y ago
I'm not sure what I ever knew about the low level on our whizzy Alphas, but I do remember a 1970s design which had (arguably?) a microkernel in hardware/firmware, was fast, and supported an A1/B3-level OS: https://
848.
by gnufx 6y ago
Obviously it's not connected by cable, but you certainly get the equivalent to cable errors, and I've been plagued by them on certain systems. It's revealing when you have a lot of systems with monitoring of ECC errors. I w
849.
by gnufx 6y ago
That seems the right approach. Why would you want anything ZFS-specific -- other than events not being documented, which presumably means you dig them out of ZED?
850.
by gnufx 6y ago
It's been pointed out it's wrong but, as a sometime nuclear spectroscopist, I'm curious: why are people insisting that β-decay, i.e. ¹⁴C, is the issue?
851.
by gnufx 6y ago
And that's if a proprietary compiler was actually available on the system. I worked for a widespread computational project that really needed GNU Fortran as eventually a reliable basis for people to use that was generally available. On
852.
by gnufx 6y ago
There were differences in whether Unix systems came with a compiler. It caused a stir and an opportunity for Cygnus when Sun introduced Solaris without one.
853.
by gnufx 6y ago
Also things like https://pintofscience.co.uk/ . One might have to be wary of assessing the merit of a talk on the basis of a liking of Guinness.
854.
by gnufx 6y ago
> The obvious ones are fluid dynamics, weather simulations, n-body problems, and simulation of quantum systems. Those are typically run on distributed memory; the question should probably have been about shared memory. They're like
855.
by gnufx 6y ago
It doesn't mean anyone will take any notice (or that it's feasible to get data in and out). Long ago, supporting crystallography, I pointed out that each image would roughly fit in the cache, and the whole dataset in memory. (On
856.
by gnufx 6y ago
OpenNebula definitely needs to revive the libcloud interface, or similar; I was thinking of complexity in operation more than using it. I ask mainly for general interest, as I can't think a free software management system would end up
857.
by gnufx 6y ago
One thing podman is used for is bootstrapping environments for package building under mock, which at least affects people doing Fedora maintenance.
858.
by gnufx 6y ago
I wonder how does Mist compare with OpenNebula, which seems to be in the same area? From a quick glance it looks more complex. (OpenNebula supports LXD directly.)
859.
by gnufx 6y ago
I don't teach, but I wonder why people use Zoom and not BigBlueButton, which at least was made for the job. It also presumably doesn't have whatever the privacy implications are with Zoom that students have to accept.
860.
by gnufx 6y ago
I read, but putting it in a co-processor makes little sense if you care about memory bandwidth and latency -- which you should to keep the vector unit fed. Fujitsu have carefully designed this stuff with such considerations in mind as far
861.
by gnufx 6y ago
Yes, I recall Paul Emsley getting more than that right. At one time the area was continually shifting around TCL, Perl, Python, not really finishing anything off. That was mainly one person's influence for some reason.
862.
by gnufx 6y ago
TCL is fat,slow,and lacks staying power. — (SIOD author) George Carrette, 1994 At least we could direct people who wouldn't see the light towards Python at that stage.
863.
by gnufx 6y ago
The evidence for "more hands-on experience than everyone in this thread combined"? I've seen him sound off about things he obviously doesn't have hands on experience with, and not obviously be proved right about things
864.
by gnufx 6y ago
I think we'd have been rather better off buying a load of Magny Cours rather than Sandybridge for a university HPC system whose procurement I wasn't sufficiently involved in.
865.
by gnufx 6y ago
SVE isn't in a co-processor, I guess is the point. There's a lot more to Fugaku than SVE (whether or not you think that's a version of avx512), though. No DDR is suggestive.
866.
by gnufx 6y ago
The current OpenMP spec has GPU offload features specifically for what was expected of the Sierra supercomputer. I'm not sure how relevant a paper that old (relatively, I hasten to add) is.
867.
by gnufx 6y ago
As I understand it, that has to work for the CORAL 2 US "exascale", so people who've been proved fairly right so far obviously have some confidence in it. (de Supinksi of Livermore said he'd be out of a job if conventio
868.
by gnufx 6y ago
At least part of the problem is that computing mostly depends on moving data. Memory bandwidth is relatively low, so it's difficult to get enough actual floating point intensity, at least for "large" arrays even when it'
869.
by gnufx 6y ago
Indeed, and possibly of less interest than the henge, for instance. It occurs to me that ancient remains are sometimes initially thought to be contemporary murders, as another angle (or saxon?).
870.
by gnufx 6y ago
It doesn't seem much hassle to me, and does seem worth the assurance. I'd have expected people to be using PGP to check distribution signatures.

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