Alberto (git.delete@this.git.it) on February 8, 2015 2:09 am wrote:
> The reason is, i can show you some syntetic bench (category so loved by ARM community) in which Haswell
> is around 60% faster at the same clock vs. the previous generation in few workloads :). Say 10-50% means
> nothing without additional informations, the bar is predominantly to the left or to the right ?? and
> the bench suite utilized to evaluate the estimation is industry standard or ......shitty.
> So better stay on the official slides ignoring the IPC for now.

Apparently I need to remind you, this is what he actually said:

"Depending on the workload we're seeing anywhere between 10-50% more clock-for-clock performance than Cortex-A57 under identical system conditions while also reducing power. I'm talking about a range of decent sized, representative workloads, not micro-benchmarks. More information on the micro-architecture and said workloads will be disclosed in due course! :)"

He says the benchmarks are representative and not the kind of thing you're trying to pass. Even if you stay near the lower end of this, like 10-20%, that kind of IPC improvement w/lower power consumption is a big deal, and represents a lot more than crediting most of any improvement on the process.

But I think you just want to discredit this no matter what and go with whatever allows you the worst interpretation because for some reason you really hate ARM. Why, WHY would you stay with official slides that are far worse and in no meaningful way more informative than what Peter's reported? Because they're so vague and carefully worded that you know you can construe them to mean the core sucks if you want to?

> No, obviously, this is the wrong thread......anyway ARM said many times to OEMs
> to stay careful with clock speed in A15 and A57, but never was heard....
> Sure the power consumption/clock speed ramp of Krait is
> less steep, and this is an advantage shared with Intel.

Show me anything resembling a measured perf/W curve for Krait, or A57 for that matter, and we can talk. Intel has nothing to do with this.