11–20 of 38 posts
In addition to what zurn said, they also don't specify the exact Core i3 model number (it could be an older generation), the RAM speed, and if the data set fits in cache. If RAM access is needed ARM machines usually fall behind quickly, since they usually have much lower RAM bandwidth.
I am getting tired of this whole dumb x86 vs. arm comparison bullshit. You cannot compare chips (read: chips not even talking about architecture here because it's not relevant) which are designed for complete different purposes (high performance big ooo workstation cpu vs. low power mobile chip). Please stop making those.
Spoiler: no. 1265 ms vs 439 ms on their OpenCV benchmark. (Then they play some what-if games by underlocking the i3 in imaginative ways and applying SIMD opts to only the ARM side)
I am getting tired of this whole dumb x86 vs. arm comparison bullshit. You cannot compare chips (read: chips not even talking about architecture here because it's not relevant) which are designed for complete different purposes (high performance big ooo workstation cpu vs. low power mobile chip). Please stop making those.
Spoiler: no. 1265 ms vs 439 ms on their OpenCV benchmark. (Then they play some what-if games by underlocking the i3 in imaginative ways and applying SIMD opts to only the ARM side)
We have applied SIMD optimizations only to ARM because thats our business. Licensing computer vision algorithms on ARM.
The blog is a by-product of that effort.
So code fully optimized for ARM/Cortex-A15 is almost as fast as only partially optimized code on a 1.2 GHz i3? Well, good to know I guess.
I am getting tired of this whole dumb x86 vs. arm comparison bullshit. You cannot compare chips (read: chips not even talking about architecture here because it's not relevant) which are designed for complete different purposes (high performance big ooo workstation cpu vs. low power mobile chip). Please stop making those.
Drill, I partly agree with you. But as you know ARM is getting into servers in a big way. The idea is low power servers(green servers as it is called) of course, and there are several silicon vendors already working on it. ARM recently announced Cortex-A57 and A53 precisely for this segment. The A57 can be expected to have a similar performance to that of A15, but with higher clocks. Hence this discussion, I believe,…
Spoiler: no. 1265 ms vs 439 ms on their OpenCV benchmark. (Then they play some what-if games by underlocking the i3 in imaginative ways and applying SIMD opts to only the ARM side)
Assuming the compiler will generate good SSE code for the Intel CPU is a joke. If you write intrinsics for one arch, write it for both.
I'd bet money the Intel side could be made 2.5-3x faster with proper SSE intrinsics and maybe 5-6x faster with a Haswell i3 using AVX (SandyBridge doesn't have the cache bandwidth to fully utilise AVX properly).
I am getting tired of this whole dumb x86 vs. arm comparison bullshit. You cannot compare chips (read: chips not even talking about architecture here because it's not relevant) which are designed for complete different purposes (high performance big ooo workstation cpu vs. low power mobile chip). Please stop making those.
People always focus on the instruction set -- "ARM's fixed length instructions are easy to decode, so it will win in the long run" -- ignoring how decoding is a tiny fraction of a CPU's silicon and power budget. Memory controllers, pipelining, and efficient superscalar instruction dispatch have far more effect, and Intel has a large lead on ARM in these areas.
On the other hand, Intel has better technology and could cannibalize itself. The future will be interesting.
Forget the Core line chips. That's irrelevant. It will remain a cash cow for the next few years, but a rapidly shrinking cash cow nonetheless. They'll move upmarket with them, until there's nowhere to move to.
ARM chips' improvements over the next years will make them "good enough" for most people, and Intel's Core chips which cost 10x more (literally) will be very uncompetitive in that environment.
Their only solution is to fight with Atom, but so far no success there, and even if they succeed, it means their profits will lower dramatically, and they need to survive as a company with much lower revenue and profit, which means the "all-powerful Intel" of the past will be but a faint memory in the future.