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Quick Guide to Generate a SSDT for CPU Power Management

I have installed the generated SSDT for my i3-3225 on Sierra following the instructions and have monitored the result using Intel Power Gadget.

The CPU works as expected operating between 1.6GHz and 3.3GHz but the IGPU stays on 350MHz.

Have I missed something? How can I test this?

thanks.
 
Mini Server 6,2
GA-B75M-D3H |  i3 3225 |  HD 4000
This did not work for me on Mojave with i7 3770. CPU got stuck at 800 MHz. I had to remove the SSDT.aml file and disable speed step to get it back to normal frequencies.
 
user1085 said:
This did not work for me on Mojave with i7 3770. CPU got stuck at 800 MHz. I had to remove the SSDT.aml file and disable speed step to get it back to normal frequencies.
Click to expand...

Easiest way for Ivy is to ignore ssdtPRgen.sh entirely...

Instead:
- delete SSDT.aml if you already created it
- set config.plist/KernelAndKextPatches/KernelXCPM=true
- set config.plist/ACPI/SSDT/Generate/PluginType=true
- make sure you're not dropping OEM CPU SSDTs (eg. DropOem=false, no CPU SSDTs identified in DropTables)
 
RehabMan said:
Easiest way for Ivy is to ignore ssdtPRgen.sh entirely...

Instead:
- delete SSDT.aml if you already created it
- set config.plist/KernelAndKextPatches/KernelXCPM=true
- set config.plist/ACPI/SSDT/Generate/PluginType=true
- make sure you're not dropping OEM CPU SSDTs (eg. DropOem=false, no CPU SSDTs identified in DropTables)
Click to expand...

Looks like that works with Speed Step enabled! However, here's the output from cat /tmp/AppleIntelInfo.dat. I've manually enabled the multiplier to a max of 39. Does this look right?

Code: 
CPU Ratio Info:
------------------------------------
CPU Low Frequency Mode.............: 1600 MHz
CPU Maximum non-Turbo Frequency....: 3400 MHz
CPU Maximum Turbo Frequency........: 3900 MHz

IGPU Info:
------------------------------------
IGPU Current Frequency.............:  350 MHz
IGPU Minimum Frequency.............:  350 MHz
IGPU Maximum Non-Turbo Frequency...:  650 MHz
IGPU Maximum Turbo Frequency.......: 1150 MHz
IGPU Maximum limit.................: No Limit

CPU P-States [ (16) 35 38 ] iGPU P-States [ (7) ]
CPU C3-Cores [ 0 1 6 7 ]
CPU C6-Cores [ 0 1 2 4 7 ]
CPU C7-Cores [ 0 1 4 5 7 ]
CPU P-States [ (16) 26 35 38 ] iGPU P-States [ (7) ]
CPU C3-Cores [ 0 1 2 6 7 ]
CPU C6-Cores [ 0 1 2 4 5 6 7 ]
CPU C7-Cores [ 0 1 3 4 5 7 ]
CPU P-States [ 16 26 35 (37) 38 ] iGPU P-States [ (7) ]
CPU C3-Cores [ 0 1 2 3 5 6 7 ]
CPU C6-Cores [ 0 1 2 3 4 5 6 7 ]
CPU C7-Cores [ 0 1 2 3 4 5 6 7 ]
CPU P-States [ 16 26 34 35 (36) 37 38 ] iGPU P-States [ (7) ]
 
user1085 said:
Looks like that works with Speed Step enabled! However, here's the output from cat /tmp/AppleIntelInfo.dat. I've manually enabled the multiplier to a max of 39. Does this look right?

Code: 
CPU Ratio Info:
------------------------------------
CPU Low Frequency Mode.............: 1600 MHz
CPU Maximum non-Turbo Frequency....: 3400 MHz
CPU Maximum Turbo Frequency........: 3900 MHz

IGPU Info:
------------------------------------
IGPU Current Frequency.............:  350 MHz
IGPU Minimum Frequency.............:  350 MHz
IGPU Maximum Non-Turbo Frequency...:  650 MHz
IGPU Maximum Turbo Frequency.......: 1150 MHz
IGPU Maximum limit.................: No Limit

CPU P-States [ (16) 35 38 ] iGPU P-States [ (7) ]
CPU C3-Cores [ 0 1 6 7 ]
CPU C6-Cores [ 0 1 2 4 7 ]
CPU C7-Cores [ 0 1 4 5 7 ]
CPU P-States [ (16) 26 35 38 ] iGPU P-States [ (7) ]
CPU C3-Cores [ 0 1 2 6 7 ]
CPU C6-Cores [ 0 1 2 4 5 6 7 ]
CPU C7-Cores [ 0 1 3 4 5 7 ]
CPU P-States [ 16 26 35 (37) 38 ] iGPU P-States [ (7) ]
CPU C3-Cores [ 0 1 2 3 5 6 7 ]
CPU C6-Cores [ 0 1 2 3 4 5 6 7 ]
CPU C7-Cores [ 0 1 2 3 4 5 6 7 ]
CPU P-States [ 16 26 34 35 (36) 37 38 ] iGPU P-States [ (7) ]
Click to expand...

As far as CPU PM, looks good to me (assuming you verified X86PlatformPlugin).
You would only see x39 if there was only a single core active.
 
RehabMan said:
As far as CPU PM, looks good to me (assuming you verified X86PlatformPlugin).
You would only see x39 if there was only a single core active.
Click to expand...

What's the X86PlatformPlugin? I haven't heard of that before or seen that in any of the guides
 
user1085 said:
What's the X86PlatformPlugin? I haven't heard of that before or seen that in any of the guides
Click to expand...

Look for it in ioreg under CPU0.
 
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