He's wrong anyway. At same (high) perf, high-end ARMs use about 1/2 the power.
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Replying to @RichFelker @travisgoodspeed
ARM chips that use half the power are half as fast. There are no ARM chips that run as fast as Intel's fastest chips.
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Replying to @ErrataRob @travisgoodspeed
You can always have same perf (assuming //izable jobs) just by adding more cores. At perf parity, ARM is ~half power consumption.
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Replying to @RichFelker @travisgoodspeed
That's what everyone thinks. Not people who know CPUs, of course, but everyone else.
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Replying to @ErrataRob @travisgoodspeed
Rich Felker Retweeted Matthew Prince
Apparently it's what
@Cloudflare thinks.https://twitter.com/eastdakota/status/976560820611031040?s=20 …Rich Felker added,
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That's because it's a network processor that includes fixed-function accelerators for crypto and compression that would otherwise be done in software on Intel CPUs.
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I've seen similar results on big compile jobs, no acceleration. Need to test myself sometime.
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Replying to @RichFelker @ErrataRob and
My semi-educated guess is that you can do way better than 1/2 power consumption (maybe as low as 10%) just by using a larger array of simpler cores rather than higher-end out-of-order ARMs.
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Yes, for some applications (like the network processing CloudFlare does). But for most tasks, the coordination among cores quickly overcomes the benefits of many cores. That's why Sun failed with their SPARC T-1 strategy.
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Replying to @ErrataRob @RichFelker and
Also, Cavium has been doing this forever (MIPS, but changed to ARM recently) and they've only gotten traction in the network appliance market, despite many attempts at servers.
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Well MIPS was a huge incoherent mess of incompatible ABIs, wrong ABIs (32-bit time_t on n32), secretly-incompatible ISA variants (mipsr6), ... with no hope of gaining traction as a platform.
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