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Search took 3.79 seconds. Search: Posts Made By: Arun
Forum: Handheld Technology 02-May-2013, 02:24
Replies: 405
Views: 26,304
Posted By Arun
In my opinion, if power was indeed higher, then...

In my opinion, if power was indeed higher, then that would mostly imply that the cache hierarchy is highly suboptimal. I still suspect an Intel-cache hierarchy with much smaller L2s and a fully...
Forum: Handheld Technology 17-Apr-2013, 09:54
Replies: 537
Views: 53,145
Posted By Arun
I'm not confirming or denying anything (it's...

I'm not confirming or denying anything (it's certainly not my place to comment on any of IMG's customers) - however my understanding of the test implies the numbers should be significantly higher for...
Forum: Handheld Technology 16-Apr-2013, 21:30
Replies: 537
Views: 53,145
Posted By Arun
The fillrate test is a bit weird so I never...

The fillrate test is a bit weird so I never bothered figuring out why exactly SGX's Android drivers were slower on it. It's fair to say it's unlike what you'll ever see in either a game or an UI...
Forum: Handheld Technology 04-Apr-2013, 12:22
Replies: 1,186
Views: 80,518
Posted By Arun
It's nearly certainly not just a different...

It's nearly certainly not just a different synthesis - they likely used a very different voltage threshold as well. While this doesn't provide as dramatic a difference as different process...
Forum: Handheld Technology 03-Apr-2013, 23:50
Replies: 1,186
Views: 80,518
Posted By Arun
Exophase believes (quite rightly I suspect) that...

Exophase believes (quite rightly I suspect) that SPECInt is basically a best case for the A15 and performance will not increase as much in most benchmarks - therefore the perf/W improvement would...
Forum: 3D Architectures & Chips 03-Apr-2013, 23:37
Replies: 1,507
Views: 150,268
Posted By Arun
Sorry for the late reply - LiXiangyang, are you...

Sorry for the late reply - LiXiangyang, are you still focusing on FP32? My understanding is that NVIDIA basically decided to only optimise GPGPU around FP64 and don't care much (enough?) about...
Forum: Handheld Technology 29-Mar-2013, 00:17
Replies: 164
Views: 18,837
Posted By Arun
AFAIK there have been very significant changes...

AFAIK there have been very significant changes since I left IMG, so it's likely different and doesn't have a single huge bottleneck anymore, but in an early version, I tried disabling the foliage...
Forum: 3D Architectures & Chips 17-Mar-2013, 13:34
Replies: 144
Views: 7,675
Posted By Arun
I think there's a slight difference in...

I think there's a slight difference in terminology here. Here's how the vector part of GCN works AFAIK:
- Single shared decoder that issues 1 vector instruction/cycle.
- 4x16-wide ALU pipelines...
Forum: Handheld Technology 15-Mar-2013, 19:57
Replies: 405
Views: 26,304
Posted By Arun
While I'm somewhat skeptical fab volumes are the...

While I'm somewhat skeptical fab volumes are the primary reason for sticking to Qualcomm on LTE, if that was the case, it would mean both Apple *and* Samsung would have good reason to want Apple to...
Forum: Handheld Technology 15-Mar-2013, 00:04
Replies: 405
Views: 26,304
Posted By Arun
1.6GHz is very high for a Cortex-A7, I agree it's...

1.6GHz is very high for a Cortex-A7, I agree it's likely that AnandTech (or Samsung) reversed the A15 and A7 clock speeds.
BTW, the baseband subsystem in that teardown looks like it's for dual-SIM...
Forum: 3D Architectures & Chips 14-Mar-2013, 15:25
Replies: 144
Views: 7,675
Posted By Arun
Ah, looks like that good ole Beyond3D article is...

Ah, looks like that good ole Beyond3D article is wrong. I think Rys probably meant 2 or 3 *Vec4* register equivalent, as G80 had 8192 registers for 768 threads, or 10 scalar FP32 registers/thread at...
Forum: 3D Architectures & Chips 14-Mar-2013, 14:46
Replies: 144
Views: 7,675
Posted By Arun
What in the world are you talking about? The only...

What in the world are you talking about? The only thing thing that processes multiple frames at a time is AFR and that's for reasons completely different than lack of available parallelism.

GK110...
Forum: 3D Hardware, Software & Output Devices 13-Mar-2013, 15:09
Replies: 231
Views: 30,762
Posted By Arun
I can't find any mention of the motherboards in...

I can't find any mention of the motherboards in that review (but maybe I'm just missing it because of the language barrier) - if so that seems like a potentially major omission.

Also, is it...
Forum: Handheld Technology 12-Mar-2013, 15:49
Replies: 1,186
Views: 80,518
Posted By Arun
http://www.anandtech.com/show/5703/jenhsuns-email-...

http://www.anandtech.com/show/5703/jenhsuns-email-to-nvidia-employees-on-a-successful-kepler-launch
The quote seemed unambiguous when I first read it, but I now realise it's slightly vague: it never...
Forum: Handheld Technology 11-Mar-2013, 18:13
Replies: 1,801
Views: 143,490
Posted By Arun
I suspect 1xA9/512KB L2 and a 32-bit LPDDR2-1066...

I suspect 1xA9/512KB L2 and a 32-bit LPDDR2-1066 interface might be enough (remember the original iPad 2's A5 used 64-bit LPDDR2-533 iirc) if they had a much more aggressive area-optimised synthesis....
Forum: Handheld Technology 11-Mar-2013, 16:03
Replies: 1,801
Views: 143,490
Posted By Arun
So going back to the smaller A5 in the silently...

So going back to the smaller A5 in the silently refreshed Apple TV - where did they get the 6x6 die size from? Macrumors gives no source for that information, as if it was obvious from their board...
Forum: Site Feedback 09-Mar-2013, 17:45
Replies: 3
Views: 2,414
Posted By Arun
First: I'll leave this in this thread for a short...

First: I'll leave this in this thread for a short time, then move the posts to Site Feedback.

Nice, that's a good attitude to have :)

The one that was deleted by willard was pure noise, and I...
Forum: Site Feedback 09-Mar-2013, 15:58
Replies: 3
Views: 2,414
Posted By Arun
Handheld Forum Moderation / Signal-to-Noise

EDIT: Moved this discussion here from the Galaxy S thread. I don't think there's a lot to add (for now?) but if anyone has feedback to give about whether we should do stricter moderation in the...
Forum: Handheld Technology 11-Feb-2013, 17:50
Replies: 1,186
Views: 80,518
Posted By Arun
Sorry, I meant DX11 API rather than DX11 GPU. I...

Sorry, I meant DX11 API rather than DX11 GPU. I can't see how they'd port their tile-based deferred shading algorithm to a system without DirectCompute/shared memory, so they'd have to revert to...
Forum: Handheld Technology 11-Feb-2013, 15:24
Replies: 1,186
Views: 80,518
Posted By Arun
John, I think french toast needs a real-world...

John, I think french toast needs a real-world example where the limitation is clearly performance rather than features. Here's the most perfect example I can think of: The Witcher 2. It's still fully...
Forum: Handheld Technology 20-Jan-2013, 10:50
Replies: 419
Views: 56,912
Posted By Arun
From the recent TSMC Q4 CC: AFAIK Qualcomm is...

From the recent TSMC Q4 CC:
AFAIK Qualcomm is by far the primary 28LP customer (there are others though, e.g. Altera which uses both 28LP and 28HP). This very likely means that Qualcomm Krait-based...
Forum: Handheld Technology 15-Jan-2013, 11:34
Replies: 1,186
Views: 80,518
Posted By Arun
Agreed in theory although none of my points had...

Agreed in theory although none of my points had anything with the extra control logic ;) To simplify the reasoning, I assumed that even on an IMR the control logic would be less expensive than adding...
Forum: Handheld Technology 15-Jan-2013, 00:03
Replies: 1,186
Views: 80,518
Posted By Arun
I would argue that's probably true. There are...

I would argue that's probably true. There are clear efficiency advantages *if* (and only if) you can meet all of these conditions:
- No support for GPGPU.
- Much lower precision pixel shader.
- No...
Forum: Handheld Technology 11-Jan-2013, 10:27
Replies: 1,186
Views: 80,518
Posted By Arun
Hah, when I wrote my initial posts it had been...

Hah, when I wrote my initial posts it had been removed and the cached version not linked yet, and then later I didn't notice. That's good news! And the even better news is that the High mode in...
Forum: Handheld Technology 10-Jan-2013, 10:52
Replies: 1,186
Views: 80,518
Posted By Arun
Hmm, interesting, I think you're right that 2x is...

Hmm, interesting, I think you're right that 2x is too high for integer workloads (although you'd expect A15 to be much closer to 2x IPC with 128-bit FP for what little it's worth). I'm honestly not...
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