Originally posted by Calinou
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The Performance-Per-Watt, Efficiency Of GPUs On Open-Source Drivers
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Michael Larabel
https://www.michaellarabel.com/
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Originally posted by droidhacker View Postdpm won't make much difference when your objective is to test the "full out" performance, since it will automatically scale up to full power.
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Originally posted by brent View PostI wouldn't be so sure about this. DPM also uses power gating or clock gating to power down blocks that might not be used by typical graphics loads, or which are not fully loaded all the time. In addition, DPM also is used for adaptive clocking (powertune and turbo modes). Maybe some of the AMD devs can comment.Test signature
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Originally posted by MannerMan View PostTrue that. Guess idle power-usage would be more interesting with/without DPM.
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so one can see many results to compare and to see total and relative stuff at once (like fps - thick bar - and CPU usage and power consumption - smaller bars) - while consumton per frame would be the most important.
it would very much show overhead too. so one could see the relation of these too. throughout the drivers GPUs and maybe different systems too.
i wanted to to have then overlayed with colours anyway... just a possibility.Last edited by jakubo; 05 June 2014, 02:09 PM.
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Looks like r600 still has the edge in raw power
That Radeon HD 6770 was defeated only by 3 larger GCN cards, yet was middle of the road for loaded power use and idled as low as most of the discrete cards. The highest performance in the entire test was a larger r600 card, the HD6870. Given how good the RadeonSI driver has become when the right firmware is used, I wonder if r600 is just plain a better architecture for how Mesa as a whole works. This tells me to sit on my HD6750 unless Kdenlive comes out with a version of the new GPU-accelerated Movit version that supports using hardware encoding for raw speed.
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Originally posted by Luke View PostThat Radeon HD 6770 was defeated only by 3 larger GCN cards, yet was middle of the road for loaded power use and idled as low as most of the discrete cards. The highest performance in the entire test was a larger r600 card, the HD6870. Given how good the RadeonSI driver has become when the right firmware is used, I wonder if r600 is just plain a better architecture for how Mesa as a whole works. This tells me to sit on my HD6750 unless Kdenlive comes out with a version of the new GPU-accelerated Movit version that supports using hardware encoding for raw speed.
1. Shader compilers take a long time to optimize, and when you change shader architecture as drastically as we did between VLIW and GCN you're pretty much starting from scratch - this gives the later VLIW parts a chance to shine for a while
2. The nature of the other remaining optimization opportunities (primarily making best use of available memory & bandwidth) is going to favor mid-range parts, since both low-end and high-end parts tend to be relatively more memory-limited
3. Things work better when DPM is enabledTest signature
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Originally posted by bridgman View PostI think there are a couple of messages here, but none of them are "r600 is a better architecture for Mesa" AFAIK:
1. Shader compilers take a long time to optimize, and when you change shader architecture as drastically as we did between VLIW and GCN you're pretty much starting from scratch - this gives the later VLIW parts a chance to shine for a while
2. The nature of the other remaining optimization opportunities (primarily making best use of available memory & bandwidth) is going to favor mid-range parts, since both low-end and high-end parts tend to be relatively more memory-limited
3. Things work better when DPM is enabled
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Originally posted by liam View PostNice roundup, Michael, though including the new firmware for the 260 would've been nice.
Can we still expect to see article about the power draw of your tegra k1 board?Michael Larabel
https://www.michaellarabel.com/
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