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[Q] DooMKernel performance

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By tknguyencsu, Senior Member on 28th April 2014, 08:51 PM
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10th May 2014, 08:24 AM |#11  
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Quote:
Originally Posted by diji1

Also DoomKernel uses Ondemand governor by default - anyone know what stock uses? But in any case my theory about governor is out the window.

Last time I checked, stock kernel was by default using the interactive governor, but AFAIK it's the same as ondemand, except that it jumps to higher frequencies more agressively when the user is interacting with the phone (mostly by a kind of touch / input boost). In latest versions of the ondemand governor, I've also seen an "input_boost" option, so I think the difference is even less clear now.

For a proper benchmark which will be more consistent and easily reproducible across your firmwares and kernels, set everything to performance (i.e. CPU and GPU governors), and disable any battery saving and thermal throttle options in the kernel (beware your phone will get HOT during the testing, avoid repeating it too many times in a row or in a hot weather, or don't do it at all if you don't want to take the risk!). That's how some people get some very high numbers, if not by OC'ing the CPU.

And smoothness and lags are almost all about the governor choice and its fine tuning. For instance, I can't get a totally smooth scroll in some apps with ondemand or intellidemand, even after tweaking the settings; however, with smartassv2 and lagfree, everything is very smooth and battery is also good.
 
 
10th May 2014, 09:19 AM |#12  
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Quote:
Originally Posted by dbolivar

Last time I checked, stock kernel was by default using the interactive governor, but AFAIK it's the same as ondemand, except that it jumps to higher frequencies more agressively when the user is interacting with the phone (mostly by a kind of touch / input boost). In latest versions of the ondemand governor, I've also seen an "input_boost" option, so I think the difference is even less clear now.

For a proper benchmark which will be more consistent and easily reproducible across your firmwares and kernels, set everything to performance (i.e. CPU and GPU governors), and disable any battery saving and thermal throttle options in the kernel (beware your phone will get HOT during the testing, avoid repeating it too many times in a row or in a hot weather, or don't do it at all if you don't want to take the risk!). That's how some people get some very high numbers, if not by OC'ing the CPU.

And smoothness and lags are almost all about the governor choice and its fine tuning. For instance, I can't get a totally smooth scroll in some apps with ondemand or intellidemand, even after tweaking the settings; however, with smartassv2 and lagfree, everything is very smooth and battery is also good.

Stock kernel uses Ondemand governor by default. It can be changed to interactive/powersave/conservative i think if i remember properly

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10th May 2014, 01:50 PM |#13  
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Quote:
Originally Posted by dbolivar

Last time I checked, stock kernel was by default using the interactive governor, but AFAIK it's the same as ondemand, except that it jumps to higher frequencies more agressively when the user is interacting with the phone (mostly by a kind of touch / input boost). In latest versions of the ondemand governor, I've also seen an "input_boost" option, so I think the difference is even less clear now.

For a proper benchmark which will be more consistent and easily reproducible across your firmwares and kernels, set everything to performance (i.e. CPU and GPU governors), and disable any battery saving and thermal throttle options in the kernel (beware your phone will get HOT during the testing, avoid repeating it too many times in a row or in a hot weather, or don't do it at all if you don't want to take the risk!). That's how some people get some very high numbers, if not by OC'ing the CPU.

And smoothness and lags are almost all about the governor choice and its fine tuning. For instance, I can't get a totally smooth scroll in some apps with ondemand or intellidemand, even after tweaking the settings; however, with smartassv2 and lagfree, everything is very smooth and battery is also good.

Ah cheers for that info and I'll start doing that on the benchmarks I do. (CPU benchmarks in particular are all over the place presumably due to governors)

That's interesting because it's been a while since I looked at the descriptions of what governors do but I seem to recall ondemand (to put it very simply) ramps up speed very quickly and basically gives high priority to performance over others.
10th May 2014, 03:20 PM |#14  
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Interactive is faster than ondemand at the expense of battery life as it ramps up the cpu frequency faster

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