GPU Bottleneck?

[anaid]

(11-24-2013, 05:12 AM)zaude93 Wrote:

(11-24-2013, 04:39 AM)anaid Wrote:

(11-23-2013, 07:39 PM)Anti-Ultimate Wrote: can't measure how good Dolphin will perform with CPU usage.

Dolphin needs a good IPC (Instructions per cycle). Your CPU has a pretty low IPC compared to newer i3, i5 and i7 Processors.
That's why it is so slow, and not because "Dolphin isn't making it run at 100% load".

Hi Anti-Ultimate , I don't know about actual comparison in terms of IPC, but from a MIPS (million instructions per second) perspective, new generation Core i7s (~14k MIPS) are not THAT big of a leap from the Core 2 Duo (~11k MIPS), from my numbers its approximately 30% more.

Though I don't know the exact process flow of Dolphin. But a slow processor should not limit how well Dolphin utilize the CPU. And as I pointed out in the original post release 3.5 does fully utilize my SLOW processor. Why would that be the case?

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(11-24-2013, 04:22 AM)KHg8m3r Wrote: Older versions are not as precise as the latest versions, thus they aren't as demanding.
However, you may be able eek out a couple more fps by changing some things up in your settings. Please post pictures of your graphics config pages?

Yah, would it be the case that newer versions of Dolphin is more demanding on the GPU such that my nVidia GT 8600M would bottlenecks the whole process?

Because the release 3.5 can fully utilize my CPU while newer versions (4.0-rXXX) give a lower FPS and at the same time can not fully utilize my CPU.

Here are my setup for dolphin 4.0 r414:

I see a problem, turn off V-sync

Thanks I will give it a try.

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(11-24-2013, 05:13 AM)KHg8m3r Wrote: Try enabling the OpenMP option. It can give a speedup.

Also, in regards to processor speeds, Dolphin uses the per-core performance. As per the single core-performance of your T9300, Passmark gives you a score of 999. The i7-4770k at base speeds has a score of 2165. Thats an increase of about 216% per core

I tried it before OpenMP doesn't really help, and as stated in the Dolphin config page "especially on CPUs with more than two cores".

My statement earlier about performance difference was aimed at IPC. That is why I used the numbers for i7-2860QM. Using i7-4770k with 3.5GHz with single core is hardly a fair comparison with a T9300 at 2.5GHz.

Nonetheless Passmark does score i7-2860QM at 1,653 compared to T9300 at 999, a good 65% increase. This tells us that the Sandy Bridge architecture is just efficient than the Penryn architecture. But not why earlier release of Dolphin can fully utilize the T9300 CPU while newer versions cannot...

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(11-24-2013, 05:12 AM)zaude93 Wrote:

(11-24-2013, 04:39 AM)anaid Wrote: Here are my setup for dolphin 4.0 r414:
http://i.imgur.com/dQ9a4ZG.png
http://i.imgur.com/V3tEu18.png
http://i.imgur.com/3KjZCG8.png
http://i.imgur.com/Tx85BDs.png

I see a problem, turn off V-sync

Thanks! Ok just tried it. Same issue with Dolphin 4-rXXX, 30 FPS, while only utilizing 70% of my CPU. But better results with Dolphin 3.5, I am getting an improvement of close to 60 FPS, with full 100% CPU utilization.....