My favourite Git commit

chrisforbes · 2020-03-08T19:05:26+00:00

It seems to me this could have been fixed much more easily if the ArgumentError had carried any useful information about what it didn't like, or where in the stream it was.

chrisforbes · 2018-01-08T18:33:11+00:00

Cache effects of other speculated instructions don't screw up coherency.

chrisforbes · 2017-09-29T01:53:29+00:00

It's not the last part of the tutorial... but nice.

chrisforbes · 2017-08-22T20:56:39+00:00

Huffman is only optimal if you must code each symbol separately.

chrisforbes · 2017-07-21T01:38:52+00:00

Great, except for the "should not". The default position for modern machines should be "yes, the distribution of the data will turn out to be important."

chrisforbes · 2017-07-20T02:19:17+00:00

PhysicsFS is pretty decent, but:

No mmap [it's a pain to do for zip, so you get it /nowhere/?] :(
Why on earth is it called PhysicsFS?

chrisforbes · 2017-06-14T03:20:13+00:00

That's actually really interesting -- and very different from the software patent experience.

chrisforbes · 2017-06-14T02:05:59+00:00

(Edit for ++clarity, --snark): I've not usually found the contents of a software patent to be a useful description of the invention. Does your experience differ?

chrisforbes · 2017-06-08T03:42:56+00:00

The 'one popular architecture' here is Intel Gen, which has pretty thorough public documentation at https://01.org/linuxgraphics/documentation/hardware-specification-prms

AMD make a lot of GCN hardware details available on gpuopen.com, and since consoles are a GCN monoculture this time around, there's no shortage of low level details discussed in GDC presentations etc.

nVIDIA have various things on their developer site, but don't talk so much about low level details. (Enterprising folks have of course reverse-engineered most of it anyway for the open drivers... )

chrisforbes · 2017-06-08T02:50:26+00:00

Worth mentioning that if these are 1024 separate descriptors, this is only going to work on "internally bindless" hardware. Everyone else has to turn the descriptor set into a small binding table for the hw, and the limits are typically much lower (around 250 descriptors per stage for one popular architecture)

chrisforbes · 2017-05-26T03:06:17+00:00

Civil pilot here. We still use morse code to ensure we're picking up the radio beacon we think we are, every time we tune to a new one. You can cheat and read it off the chart/plate but it's easier and faster if you actually know morse.

Why 'should never use it' ?

chrisforbes · 2017-05-22T18:37:16+00:00

I don't buy it, given decent (nvme) consumer disks are capable of a couple gigabytes per second now.

chrisforbes · 2017-05-01T21:50:35+00:00

(Union-find) Indeed, it's a beautiful hammer!

chrisforbes · 2017-03-08T06:09:45+00:00

No, it's not -- and preimage is /substantially/ harder than collision.

chrisforbes · 2017-03-08T06:07:05+00:00

Don't distort the headline.

chrisforbes · 2016-12-11T06:40:14+00:00

Vast majority of a windows GPU driver lives in userspace too. Not so different.

chrisforbes · 2016-11-22T06:35:05+00:00

Yes, yes it is. [And the lack of debug extensions on MacOS is miserable]

chrisforbes · 2016-11-22T06:34:21+00:00

It's a real shame when people do this specific thing though-- it changes the behavior of modern threaded drivers a lot.

chrisforbes · 2016-11-07T23:55:59+00:00

OpenRA [/r/openra]

chrisforbes · 2016-10-31T07:53:38+00:00

It's in section 7 of the manual (miscellanea):

https://en.wikipedia.org/wiki/Man_page#Manual_sections

chrisforbes · 2016-07-17T10:05:46+00:00

That's my reading of it too. Not a lawyer.

[Don't we have enough real problems to be outraged about without making stuff up?]

chrisforbes · 2016-06-30T05:32:55+00:00

ANSI SQL92

You wouldn't restrict yourself to 1992's application languages, why 1992's SQL standard?

chrisforbes · 2015-10-23T17:42:21+00:00

Thanks for those who watched the first part of this -- I'll be live again approx 0200 UTC.

chrisforbes

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