By: dmcq (dmcq.delete@this.fano.co.uk), February 4, 2015 1:10 pm
Room: Moderated Discussions
Peter Greenhalgh (no.delete@this.thanks.com) on February 4, 2015 11:56 am wrote:
> Hi David,
>
> Hope you are doing well.
>
> I'm going to avoid being drawn in to the discussion here, though it's great to read the speculation! :)
>
> However, I will shed some more light on some of the questions & comments
> in this thread with information we announced yesterday in San Francisco.
>
> Firstly, there are micro-architectural enhancements throughout the Cortex-A72 design which improve both
> IPC and power. In fact, the Cortex-A72 power improvements are achieved on the same process with the same
> library as Cortex-A57. We aren't relying on a process shrink to achieve the power improvement or boost
> performance purely through frequency. 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! :)
>
> With respect to the performance uplift numbers over Cortex-A15 and Cortex-A57 that we quoted at the
> launch. These do factor in process technology. Cortex-A15 is predominantly a 28nm product, Cortex-A57
> is mainly on 20nm and Cortex-A72 we expect to see on 14nm/16nm. While the audience here on RWT is
> very technical and understands the nuances of process geometry, many of the press we speak to want
> an appreciation of how much faster the processor in their favourite phone, tablet, may be in the
> future. To that end we quote performance uplift as a combination of the IPC improvement and the extra
> frequency afforded to our silicon partners due to advances in process technology.
>
> Overall we're extremely pleased to have increased IPC while meaningfully decreasing power
> across various use cases. It's going to be great to see Cortex-A72 in partner platforms.
> As we've got more than 10 partners extremely active with the processor I hope the wait
> won't be too long! [in a big.LITTLE configuration with Cortex-A53 of course ;)]
>
> I'm going back to lurk-mode now.
>
> Best Regards,
>
> Peter Greenhalgh (Director of Technology, CPU Group, ARM)
>
Thanks very much for those details. The ipc gain sounds very worthwhile but what I find particularly impressive is the huge power requirement reduction. That is far better than could be expected from the process change and must have taken a lot of design effort.
> Hi David,
>
> Hope you are doing well.
>
> I'm going to avoid being drawn in to the discussion here, though it's great to read the speculation! :)
>
> However, I will shed some more light on some of the questions & comments
> in this thread with information we announced yesterday in San Francisco.
>
> Firstly, there are micro-architectural enhancements throughout the Cortex-A72 design which improve both
> IPC and power. In fact, the Cortex-A72 power improvements are achieved on the same process with the same
> library as Cortex-A57. We aren't relying on a process shrink to achieve the power improvement or boost
> performance purely through frequency. 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! :)
>
> With respect to the performance uplift numbers over Cortex-A15 and Cortex-A57 that we quoted at the
> launch. These do factor in process technology. Cortex-A15 is predominantly a 28nm product, Cortex-A57
> is mainly on 20nm and Cortex-A72 we expect to see on 14nm/16nm. While the audience here on RWT is
> very technical and understands the nuances of process geometry, many of the press we speak to want
> an appreciation of how much faster the processor in their favourite phone, tablet, may be in the
> future. To that end we quote performance uplift as a combination of the IPC improvement and the extra
> frequency afforded to our silicon partners due to advances in process technology.
>
> Overall we're extremely pleased to have increased IPC while meaningfully decreasing power
> across various use cases. It's going to be great to see Cortex-A72 in partner platforms.
> As we've got more than 10 partners extremely active with the processor I hope the wait
> won't be too long! [in a big.LITTLE configuration with Cortex-A53 of course ;)]
>
> I'm going back to lurk-mode now.
>
> Best Regards,
>
> Peter Greenhalgh (Director of Technology, CPU Group, ARM)
>
Thanks very much for those details. The ipc gain sounds very worthwhile but what I find particularly impressive is the huge power requirement reduction. That is far better than could be expected from the process change and must have taken a lot of design effort.
Topic | Posted By | Date |
---|---|---|
ARM announces A72 | Maynard Handley | 2015/02/03 11:36 AM |
ARM announces A72 | anon | 2015/02/03 12:53 PM |
ARM announces A72 | Hugo Décharnes | 2015/02/03 01:20 PM |
ARM announces A72 | juanrga | 2015/02/03 04:15 PM |
ARM announces A72 | Wilco | 2015/02/04 12:58 AM |
ARM announces A72 | Eric Bron | 2015/02/04 01:48 AM |
ARM announces A72 | none | 2015/02/04 02:24 AM |
ARM announces A72 | Eric Bron | 2015/02/04 02:42 AM |
ARM announces A72 | Exophase | 2015/02/04 07:01 AM |
ARM announces A72 | Anon | 2015/02/04 07:35 AM |
ARM announces A72 | Exophase | 2015/02/04 07:58 AM |
ARM announces A72 | Groo | 2015/02/04 09:24 AM |
ARM Marketing, BS up to my ears | David Kanter | 2015/02/04 10:51 AM |
ARM Marketing, BS up to my ears | Maynard Handley | 2015/02/04 01:59 PM |
ARM Marketing, BS up to my ears | David Kanter | 2015/02/04 02:21 PM |
ARM Marketing, BS up to my ears | Groo | 2015/02/04 02:30 PM |
ARM announces A72 | juanrga | 2015/02/04 04:23 AM |
ARM announces A72 | Wilco | 2015/02/04 03:01 PM |
ARM announces A72 | juanrga | 2015/02/04 04:06 PM |
ARM announces A72 | Anon | 2015/02/04 01:28 AM |
ARM announces A72 | juanrga | 2015/02/04 04:31 AM |
ARM announces A72 | Aaron Spink | 2015/02/04 06:49 AM |
ARM announces A72 | Ronald Maas | 2015/02/03 07:23 PM |
ARM announces A72 | Seni | 2015/02/04 12:19 AM |
ARM announces A72 | Maynard Handley | 2015/02/04 10:42 AM |
ARM announces A72 | Seni | 2015/02/04 12:33 PM |
ARM announces A72 | dmcq | 2015/02/04 12:57 PM |
ARM announces A72 | Ronald Maas | 2015/02/04 06:42 PM |
ARM announces A72 | anon | 2015/02/04 05:19 AM |
ARM announces A72 | Exophase | 2015/02/04 07:31 AM |
ARM announces A72 | David Kanter | 2015/02/04 10:25 AM |
ARM announces A72 | Exophase | 2015/02/04 01:33 PM |
ARM announces A72 | anon | 2015/02/04 10:27 PM |
ARM announces A72 (fixed format) | anon | 2015/02/04 10:29 PM |
ARM announces A72 | Exophase | 2015/02/04 11:11 PM |
ARM announces A72 | anon | 2015/02/05 12:02 AM |
ARM announces A72 | anon | 2015/02/04 05:57 PM |
ARM announces A72 | Wilco | 2015/02/03 01:39 PM |
ARM announces A72 | Maynard Handley | 2015/02/03 02:13 PM |
ARM announces A72 | anon | 2015/02/03 02:29 PM |
ARM announces A72 | Wilco | 2015/02/03 02:44 PM |
ARM announces A72 | David Kanter | 2015/02/04 09:56 AM |
ARM announces A72 | Peter Greenhalgh | 2015/02/04 10:56 AM |
ARM announces A72 | Aaron Spink | 2015/02/04 11:59 AM |
ARM announces A72 | Alberto | 2015/02/07 10:22 AM |
ARM announces A72 | Exophase | 2015/02/07 10:47 AM |
ARM announces A72 | Alberto | 2015/02/07 12:44 PM |
ARM announces A72 | Exophase | 2015/02/07 02:35 PM |
ARM announces A72 | Alberto | 2015/02/08 01:09 AM |
ARM announces A72 | Exophase | 2015/02/08 11:05 AM |
ARM announces A72 | David Kanter | 2015/02/08 12:39 AM |
ARM announces A72 | dmcq | 2015/02/08 04:14 AM |
ARM announces A72 | Michael S | 2015/02/08 04:38 AM |
ARM announces A72 | Gabriele Svelto | 2015/02/10 05:11 AM |
ARM announces A72 | Jouni Osmala | 2015/02/10 11:24 AM |
slit vs unified | Michael S | 2015/02/10 01:57 PM |
slit vs unified | dmcq | 2015/02/11 05:44 AM |
ARM announces A72 | Doug S | 2015/02/08 09:00 AM |
ARM announces A72 | Exophase | 2015/02/08 10:57 AM |
ARM announces A72 | dmcq | 2015/02/04 01:10 PM |
ARM announces A72 | David Kanter | 2015/02/04 02:28 PM |
ARM announces A72 | Wilco | 2015/02/04 01:59 PM |
ARM announces A72 | Aaron Spink | 2015/02/04 09:31 PM |
Intel 32nm vs 14 nm | Michael S | 2015/02/05 01:03 AM |
Intel 32nm vs 14 nm | Wilco | 2015/02/05 02:27 AM |
Intel 32nm vs 14 nm | David Kanter | 2015/02/05 09:05 AM |
Intel 32nm vs 14 nm | carop | 2015/02/05 11:12 AM |
Normalize to drawn or effective width? | David Kanter | 2015/02/05 11:45 AM |
Normalize to drawn or effective width? | carop | 2015/02/05 02:40 PM |
Normalize to drawn or effective width? | David Kanter | 2015/02/06 12:44 PM |