It seems no one is talking about it? it is already commercially available in the mediatek soc of the AFTV2015. Is there a write up that I missed? Has anyone spoken about IPC and other aspect of this core yet?
Arm a72?
- Thread starter monstercameron
- Start date
Cortex-A72 is in Kirin 950 which is supposed to be in Huawei Mate 8, but the latter hasn't been released yet.
Oh snap! If it's at least rootable, I'd be all over that (would be fairly trivial to install Debian).
That's for the 2014 variant.Quickly looking with Google, it seems like soldering is required
In any case it's a bit too much of a pain to work with otherwise I would have done a piece with it.
And it comes with a Snapdragon 600. There are other devices with this CPU that are easier to root and/or bootloader unlock.
are you sure about that? I've seen root unlocks across multiple devices using the same hardware via similar methods.
maybe but i dont believe so, arm has stated iirc, 1.1-1.5x perf uplift vs a57.
how was a7 compared to a57?
Arachnotronic
Lifer
- Mar 10, 2006
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It still leads
Looking at the individual results it looks like Apple wins on vectorized benchmarks, which points at wider SIMD units than A72.
Oh nice! Didn't realize there were benchmarks out yet. I don't think any of the geekbench benchmarks are vectorized, as they have to run on all hardware (no-neon, etc). If that were the case the A7 FP numbers would be much higher.
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I think it's actually running at 2.0 GHz, not the 1.57 GHz listed. The MediaTek part has 2 A72 cores @ 2.0 GHz and 2 A53 @ 1.6 GHz. I really doubt these results are on the A53 cores.
NTMBK
Lifer
- Nov 14, 2011
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As it's not a battery-powered device and is not a handheld, it might have significantly higher power limits.
We'll have to see A72 in a battery-powered device for real comparisons.
It is.
Sorry, was thinking about 32-bit code. Yes, standard v8 does require Neon.
If it is vectorized, it's very poorly done. A7 with the Accelerate library can push over 8 GFlops/s DGEMM per core, while geekbench reports less than 2. Obviously these libraries aren't available for Android, but the level of vectorization in these tests are very low. Looking at the A72 numbers, DGEMM: 1.35 GFlops/s is less than 1 flop per cycle and SGEMM: 3.01 GF/s is ~1.5 f/c.
If it is vectorized, it's very poorly done. A7 with the Accelerate library can push over 8 GFlops/s DGEMM per core, while geekbench reports less than 2. Obviously these libraries aren't available for Android, but the level of vectorization in these tests are very low. Looking at the A72 numbers, DGEMM: 1.35 GFlops/s is less than 1 flop per cycle and SGEMM: 3.01 GF/s is ~1.5 f/c.
StrangerGuy
Diamond Member
- May 9, 2004
- 8,443
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It still leads
Looking at the individual results it looks like Apple wins on vectorized benchmarks, which points at wider SIMD units than A72.
The slight margin the A72 wins over the A7 in both ST/MT scores is dreadful for a SoC that still doesn't hit retail yet and the A7 is already over 2 years old by this point while only being dual-core.
BTW my Xiaomi phone with Snapdragon 400 feels amazingly quick despite only a ST/MT score of ~450/1500 pts. Software is a much more potent bottleneck than the SoC in Android.
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