tntn

15 ms·

91.
by tntn 7y ago
I'm not familiar with mobile / APUs, but I was under the impression that it was still necessary to do clCreateBuffer (or similar). I could only find old slides ( https://developer.amd.com/wordpress/media/2
92.
by tntn 7y ago
I think you'd have a hard time making a case that Summit is a cyclical return to any part of the Amiga 500 :) "fully coherent single address space with all memory available to [all processors]" is a lot easier if there is no
93.
by tntn 7y ago
It's probably not a great comparison to compare the theoretical numbers of Frontier to the achieved numbers of the green 500. The achieved flops is pretty much always considerably lower than the theoretical flops. Titan is a 27 PFLOPS
94.
by tntn 7y ago
i7-6950X: 256 KiB L2/core, 2.5 MiB L3/core i9-7960X: 1024 KiB L2/core, 1.375 MiB L3/core Seems to be exactly what I described? L2/core went up by 768 KiB, L3/core went down by 1.125 MiB.
95.
by tntn 7y ago
IMO the coolest thing about Summit/Sierra is that the GPUs and CPUs have a fully coherent single address space with all memory available to the GPUs by default, meaning that your stack- and malloc-allocated variables can be used direct
96.
by tntn 7y ago
But skylake also has much less L3 per core, so the increased L2 is less like cache growth and more like a rebalancing. The change to a non-inclusive L3 is more likely to contribute to greater capacity.
97.
by tntn 7y ago
(2007)
98.
by tntn 7y ago
This is less a criticism of the paper than it is a statement of misaligned expectations. > but the mechanism behind this is entirely hand-waving. The objective of this paper was not to specify, or even attempt to specify, the mechanism.
99.
by tntn 7y ago
Dr. Petit has said that his theories are based on his personal interactions with aliens and that the U.S. Army has tested antimatter bombs on Jupiter, so there's that.
100.
by tntn 7y ago
Anyone know what happened circa GCC 5 that changed the version number scheme? It felt like GCC 4 was around forever and now they do whole number increments every year or so.
101.
by tntn 7y ago
> This simply won't die, will it? Please clarify how you think that statement is incorrect. As far as I'm concerned, it won't die because that's how virtual memory works, and you have something going on in your head t
102.
by tntn 7y ago
> here is using mmap for general file IO > nobody has ever suggested avoiding virtual memory except you Do you know what the "anonymous" in "anonymous mapping" means? You are the one that started asserting that ano
103.
by tntn 7y ago
As if "avoid virtual memory" is substantially more of a "sweeping generalization" than "avoid mmap." If you apply the same reasoning that you've used to conclude that everyone should avoid mmap, than you a
104.
by tntn 7y ago
So should we extend your conclusion above to the following? "There is probably enough evidence in this thread to use it as a reference for why typical apps should avoid virtual memory whenever possible -- it's clear almost nobody
105.
by tntn 7y ago
Are you dying soon? If not, there's no deadline. If the people you know did a cool thing at 20 or 21, and you do a cool thing at 24 or 25 (or 45 or 55 or 65 or ...), it is still cool, is it not? It seems clear that you aren't actu
106.
by tntn 7y ago
Humans can be 30+% better than "humans" by 1. not using a phone and 2. not being drunk or stoned. A few percent better than "humans" is quite bad relative to a semi-responsible human driver.
107.
by tntn 7y ago
"Aye, that's the rub" thought the audience while contemplating escaping their life to escape the boredom.
108.
by tntn 7y ago
> what about the Bible (Jesus)? Erm, what? > what about Socrates? Erm, what?
109.
by tntn 7y ago
Unless you share it between processes.
110.
by tntn 7y ago
I don't see how this would really work. As soon as one core pulls in a cache line, all the other cores know about it, so somehow you would have to roll back all the coherency messaging as well.
111.
by tntn 7y ago
... yeah. And that is a different discussion. The article, and the discussion here, is regarding side channels attacks within a single process. I'm pretty sure everyone agrees that the hardware (or some conspiracy of the hardware and k
112.
by tntn 8y ago
... there's no criticism in this article.
113.
by tntn 8y ago
either that or NYC is just really inefficient in terms of cost. Keep in mind you've cited probably the first or second most expensive mile of any subway ever built, and subways usually cost much more than other trains. China regularly
114.
by tntn 8y ago
I guess they are just counting on testing via the irresponsible tesla drivers who tape water bottles to the steering wheel and such.
115.
by tntn 8y ago
A third of fatal accidents involve drunk drivers. I find it interesting that the apparent objective is to make driving safer, but apparently the powers that be have decided that it is easier to make cars that drive themselves than to convin
116.
by tntn 8y ago
> Trains involve massive capital outlays And self-driving cars don't? How many trains could be built with the billions invested so far in self-driving cars?
117.
by tntn 8y ago
You would prefer we segregate people into cities based on some measure of worth? No thanks. What do you have in mind? The stanford elites get to live in san francisco, and the less-elite get shipped elsewhere?
118.
by tntn 8y ago
Perfect for a response to 'nipponese's comment.
119.
by tntn 8y ago
Because people tend to distinguish between "cities" and "towns." There are a lot of ghost towns, but few ghost cities. Once a settlement becomes large enough to be called a city, it is rare for it to die.
120.
by tntn 8y ago
> die all the time > ur died, Babylon died. Your two examples are from 2-3 millennia ago. I would think if cities "die all the time," you would have more recent examples. Maybe it proves the author correct that the first cit

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