twtw

10 ms·

31.
by twtw 8y ago
I need to take a look at the patches (on mobile now), but can anyone comment on how a barrier at unlock can provide ordering between mmio accesses under the same lock? Or is it required that every register have a unique lock?
32.
by twtw 8y ago
Does it also bother you when people talk about using a "mouse" to move "files" to their "desktop?"
33.
by twtw 8y ago
When were you a kid?
34.
by twtw 8y ago
Your garden analogy is poor for several reasons. the primary reason is that it is not remotely comparable to the theft of trade secrets in my example. If the gardener put their garden in a greenhouse and put a padlock on the door, then the
35.
by twtw 8y ago
I have a hard time seeing a meaningful future for opencl. Apple (the original creator of opencl) has deprecated it on their platforms in favor of metal. I think Intel has implementations, but IMO you are better off with ISPC if you are targ
36.
by twtw 8y ago
I genuinely do not understand your position. Let's say a U.S. company spends a billion dollars creating a chip design. You think that it should not be illegal for other companies to steal said chip design and manufacture it because it
37.
by twtw 8y ago
Did theranos have anyone doing real research work? My understanding was that theranos had real, good scientists who were continuously pressured to fabricate results and do quick hacks to keep up appearances. What real research work could an
38.
by twtw 8y ago
> no different to conventional history and culture. It just has computers in it. I would argue that it is different, because it has computers in it. > The biggest digital systems we have now have been consciously and deliberately de
39.
by twtw 8y ago
With respect, I think most comments here are missing Dyson's point (perhaps because it was somewhat poorly made). I don't think his point is about whether the integrator and analog electronics will be resurgent in the next century
40.
by twtw 8y ago
Bit of a lmgtfy question, but here you go: https://github.com/rapidsai https://github.com/rapidsai/cudf/blob/branch-0.6/LICENSE
41.
by twtw 8y ago
Pro tip: justify why dividing data set size by time to solution and saying number is small is a good analysis. Let's try imagenet training. Intel's best time is 3h25m on 128 nodes. Imagenet is ~150 gb. (150 GB)/(3 hr * 3600 s
42.
Flavors of SIMD(zeuxcg.org)
4 points by twtw 8y ago|0 comments
43.
by twtw 8y ago
If you haven't noticed, there are plenty of standards kicking around in graphics and there isn't a need for any more. AMD, Nvidia, and Intel do a pretty good job supporting all of them - you can write a DX12 (or opengl, or Vulkan)
44.
by twtw 8y ago
lol yes, thank you.
45.
by twtw 8y ago
The primary failure mode of a TV in the 70s was a tube that went bad. Easy fix: open TV, pop out old tube, pop in old tube, done. If a TV breaks now, it's some component that's either glued in or soldered in, so good luck replacin
46.
by twtw 8y ago
Sure, I was just pointing out that control wasn't on your list - it doesn't fall under any of aerodynamics or propulsion or structures.
47.
by twtw 8y ago
I thought amdgpu only officially supported GCN 1.2 and later, which is more like 4.5 years old?
48.
by twtw 8y ago
As far as I can tell, you are describing problems already solved by virtual memory.
49.
by twtw 8y ago
It's also quite a challenging control problem, which at the end of the day turns into a software problem. You can see what spacex (probably) does to turn it into a tractable problem for real time control in http://www.larsbl
50.
by twtw 8y ago
Regardless of the accuracy of your claims regarding spectre v1, I'd like to see a source saying that spectre cannot defeat process isolation on AMD Zen. I've found a lot of sources that don't support that, and none that do. T
51.
by twtw 8y ago
Here's alan cox saying what I've been trying to say, from https://marc.info/?l=linux-kernel&m=151503218808512&w=2 : > If you read the papers you need a very specific construct in order to not only cause
52.
by twtw 8y ago
> Spectre v1 (bounds check bypass) only works inside processes I don't think this is true. If it is, why did Linux add speculation barriers to bounds checks in the kernel? I was in a discussion of this last week on another thread -
53.
by twtw 8y ago
I guess I jumped the gun a bit in my comment above. In terms of the possibility of exploit, as I understand there isn't at this point any isolation between processes. In terms of the ease of exploit, being able to run untrusted cod
54.
by twtw 8y ago
For meltdown (spectre v3, iirc) It's not so much sharing memory as sharing address space. Processes have different page tables. Threads within a process share page tables. For spectre v1 and v2, right now (on existing hardware) mostly
55.
by twtw 8y ago
> With properly designed OoO, Spectre cannot defeat process isolation It's worth noting that no existing or announced common hardware is "properly designed" according to this condition. Even the "fixed" Intel har
56.
by twtw 8y ago
It's worth noting that all four of your examples routinely run on GPUs. 3D graphics? Check (freebie). Fluid dynamics? Check - supercomputers increasingly get most of their compute from GPUs. Cryptography? Check - this is the only one t
57.
by twtw 8y ago
I don't really want to get into an argument over definitions, but IMO pagerank is pretty obviously machine learning.
58.
by twtw 8y ago
> Once everyone realizes every practical use of their AI technology is more than adequately met by conventional code I'm all for skepticism for the current hyperbole, but there's no need to be hyperbolic in the other direction.
59.
by twtw 8y ago
FWIW Manti in 1860 probably had a population of a few hundred, so the population of females aged 16-25 (or whatever upper age you think is reasonable) could have been quite small. If only 2% of women over age 16 as also under age 18, that s
60.
by twtw 8y ago
I would happily take a deal where all the advertising tech companies leave, and only the hardware companies remain (remember why it was originally called silicon valley, not adtech/web/social/... valley).

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