Apple Silicon M1: Black Magic Fuckery

Re:Apple Silicon M1: Black Magic Fuckery by gameswithgo on Tuesday November 24, 2020 @07:39PM (#25204710)

no its normal mobile ram

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Re:Apple Silicon M1: Black Magic Fuckery by sliken on Wednesday November 25, 2020 @12:41AM (#25206311)

The M1 has 4 LPDDR4x chips inside the the CPU package running at 4266 Mhz and showing some of the best latencies I've seen.

What "normal" laptop has that?

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Re:Apple Silicon M1: Black Magic Fuckery by MobiusHorizons on Wednesday November 25, 2020 @02:26AM (#25206748)

I believe the poster meant "normal" in the sense that it's a conventional memory technology for laptops. (ie LPDDR4 not GDDR like had been suggested above).

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Re:Apple Silicon M1: Black Magic Fuckery by gameswithgo on Wednesday November 25, 2020 @07:36AM (#25208545)

being inside the cpu package should allow for less than a 1% improvement in latency by my napkin math. its got good latency because it is a top of the line mobile ram setup but that isn’t unique to m1

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Re:Apple Silicon M1: Black Magic Fuckery by sliken on Wednesday November 25, 2020 @11:02AM (#25210610)

I 100% agree, but I've audited my code, and on other platforms my code closely agrees with LMbench's lat_mem_rd, which seems pretty well regarded for accuracy.

The latency appears real to me.

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