General > General Technical Chat
Easy money...£200k/yr job in electronics?
Brumby:
I almost made it to 2 days before giving in the the click-bait title.
Can't say I was surprised at what I found. But there was a little side content on processing cores that gave some brightness to the exercise.
Still, that's 4 minutes I'll never get back.
tggzzz:
--- Quote from: coppice on March 23, 2020, 12:45:24 pm ---
--- Quote from: tggzzz on March 23, 2020, 08:34:42 am ---The fundamental limits are the speed of light (i.e. latency) and heat generation. We are pushing both: compare the heat flux with that in a kettle or nuclear reactor, and the time it takes a signal to get across a chip (worse: to another chiplet) with the clock period.
--- End quote ---
The speed of light is fundamental, but the heat generation we face is only a limit of current technology. The fundamental heat limits are far lower. Maybe we'll get there. Maybe we won't.
--- End quote ---
If you are thinking of the energy-information equivalence, then I agree. Beyond that, my statement about heat generation is at the very least a good approximation :)
--- Quote ---
--- Quote from: tggzzz on March 23, 2020, 08:34:42 am ---The AMD/intel chips (and SMP big iron) all rely on cache coherency. The messages associated with cache coherency protocols become a limiting factor: too many messages, too long latency.
There are a few techniques for not requiring cache coherency, e.g. CSP and descendents, or MapReduce etc. We need more techniques.
--- End quote ---
People have been saying this since 2 CPUs were first applied to a single problem, and the results so far have generally been poor. We certainly need to keep working hard on this, but I wouldn't plan my future around the expectation of massive improvements.
--- End quote ---
Agreed. The main point is to get the unwashed masses to realise there is an issue that can't be ignored, especially since simple semiconductor scaling has hit limits.
coppice:
--- Quote from: tggzzz on March 24, 2020, 09:22:36 am ---
--- Quote from: coppice on March 23, 2020, 12:45:24 pm ---
--- Quote from: tggzzz on March 23, 2020, 08:34:42 am ---The fundamental limits are the speed of light (i.e. latency) and heat generation. We are pushing both: compare the heat flux with that in a kettle or nuclear reactor, and the time it takes a signal to get across a chip (worse: to another chiplet) with the clock period.
--- End quote ---
The speed of light is fundamental, but the heat generation we face is only a limit of current technology. The fundamental heat limits are far lower. Maybe we'll get there. Maybe we won't.
--- End quote ---
If you are thinking of the energy-information equivalence, then I agree. Beyond that, my statement about heat generation is at the very least a good approximation :)
--- End quote ---
Vacuum tubes took huge power. TTL took less. NMOS took less. CMOS took less. The power limitations we see right now are a result of the technology we currently use, and that has seen several dramatic changes, and a whole lot of refinement. Your comment really assumes the electronics industry has reached the end of the road. I find that idea too depressing to accept without reason.
tggzzz:
--- Quote from: coppice on March 24, 2020, 09:27:35 am ---
--- Quote from: tggzzz on March 24, 2020, 09:22:36 am ---
--- Quote from: coppice on March 23, 2020, 12:45:24 pm ---
--- Quote from: tggzzz on March 23, 2020, 08:34:42 am ---The fundamental limits are the speed of light (i.e. latency) and heat generation. We are pushing both: compare the heat flux with that in a kettle or nuclear reactor, and the time it takes a signal to get across a chip (worse: to another chiplet) with the clock period.
--- End quote ---
The speed of light is fundamental, but the heat generation we face is only a limit of current technology. The fundamental heat limits are far lower. Maybe we'll get there. Maybe we won't.
--- End quote ---
If you are thinking of the energy-information equivalence, then I agree. Beyond that, my statement about heat generation is at the very least a good approximation :)
--- End quote ---
Vacuum tubes took huge power. TTL took less. NMOS took less. CMOS took less. The power limitations we see right now are a result of the technology we currently use, and that has seen several dramatic changes, and a whole lot of refinement. Your comment really assumes the electronics industry has reached the end of the road. I find that idea too depressing to accept without reason.
--- End quote ---
As you put it in the other context, "We certainly need to keep working hard on this, but I wouldn't plan my future around the expectation of massive improvements."
Gregg:
--- Quote from: tggzzz on March 24, 2020, 09:36:49 am ---
--- End quote ---
As you put it in the other context, "We certainly need to keep working hard on this, but I wouldn't plan my future around the expectation of massive improvements."
[/quote]
Wait for it
Just wait for Treez to show his super powers and become rich and famous. :-DD :-DD
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