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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 10 Nov 2020
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      Is it me, or is the Apple Silicon marketing speak focusing almost exclusively on accelerators? Yes it does encoding and camera and ML and has a better GPU than Intel iGFX and accelerates crypto. We get it, it's a mobile SoC, that's how those work *at all*. Low power too.

      3 replies 17 retweets 87 likes
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    2. Hector Martin‏ @marcan42 10 Nov 2020
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      But what about general purpose computing? I mean sure, it's going to beat Intel on performance/watt (anyone can do that lol) but what about peak performance? The only benchmark that stands out is "Build code in Xcode up to 2.8x faster." but how much of that is CPU vs SSD?

      5 replies 2 retweets 30 likes
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    3. Hector Martin‏ @marcan42 10 Nov 2020
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      I'm still standing behind my prediction that Rosetta 2 is going to disappoint for number crunching, which is what people in any plug-in ecosystems are going to be stuck with for many years to come.

      1 reply 1 retweet 19 likes
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    4. Hector Martin‏ @marcan42 10 Nov 2020
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      Now the other question is whether Apple can deliver a true high performance SoC to compete with the x86 solution on the high end. M1 obviously isn't it. 16GB max and no eGPU/dGPU support means it can only compete with ultraportable/embedded class x86.

      3 replies 3 retweets 25 likes
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      Hector Martin‏ @marcan42 10 Nov 2020
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      Now if they can come up with something that competes in the same class as a PS5 SoC (to give a baseline x86 design by a competent company, because Intel have been failing for years), *then* things will get really interesting. But today is not that day.

      10:50 PM - 10 Nov 2020
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      2 replies 1 retweet 24 likes
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        2. Hector Martin‏ @marcan42 10 Nov 2020
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          What we're seeing right now is Apple stretching the mobile/tablet market segment hardware, which they've gotten *very* good at, to encroach on Intel's ultraportable/embedded segment, which they've sucked at. Logical. Now can they go higher? We'll see.

          1 reply 6 retweets 30 likes
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        3. Hector Martin‏ @marcan42 10 Nov 2020
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          Oh yeah, and One More Thing. Rosetta 2 *necessarily* uses more RAM than native execution. You need to keep the ARM JIT/AoT code/caches *and* the x86 code around, and probably some overhead on redundant JITting too etc. Now consider the 16GB limitation on top of that.

          4 replies 1 retweet 34 likes
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        4. Hector Martin‏ @marcan42 10 Nov 2020
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          Very smart people have been doing high-perf emulation (yes it's emulation, *every* modern emulator uses dynamic translation and has for over a decade) for a long time. There is no such thing as "transpiling an x86 app into ARM". It's just not a solvable problem.

          2 replies 1 retweet 27 likes
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        5. Hector Martin‏ @marcan42 10 Nov 2020
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          Rosetta 2 will be fast at some things, and suck at others. This is always the case with emulation. If you can hit the fast path on inner loops and get the SIMD right, then those things will be fast. If you get unlucky and hit some silly corner case, performance will tank.

          0 replies 2 retweets 26 likes
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        6. End of conversation
        1. Henning Paul‏ @hennichodernich 10 Nov 2020
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          Replying to @marcan42

          Too bad Sony doesn't build VAIOs anymore. They could have built a nice high end laptop based on PS5 technology.

          0 replies 0 retweets 2 likes
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