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improve uncore handling for newer CPUs
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Add additional menu option to show uncore fab frequency
separately to core infomration, as there is not a 1:1
relationship (new -f flag)

the -L option for repeating output has been detached from
the core info output, so now need to do -L 2 -l to repeatedly
show core info or -L 2 -lf to show core and uncore fabric info.

For newer SKUs with multiple uncore fabrics, the uncore output
will now show them separately, and the min/max can be set on
and individual fabric.

To do any uncore operations, the intel_uncore_frequency driver
must be present.

Signed-off-by: David Hunt <[email protected]>
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climberhunt committed Jan 16, 2025
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105 changes: 68 additions & 37 deletions power.md
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Original file line number Diff line number Diff line change
Expand Up @@ -55,19 +55,20 @@ When executing the script with the '-h' command line parameter, the user is
presented with help text:

```bash
# power.py -h
# power.py -h

/usr/local/sbin/power.py -i -M <maxfreq> -m <minfreq> -s <setfreq> -r <range> -g <governor>
power.py -i -M <maxfreq> -m <minfreq> -s <setfreq> -r <range> -g <governor>
<no params> use interactive menu
-h Show this help
-i Show information on available freqs, C-States, etc
-f Show UNCORE information
-l List information on each core
-L <sec> List information on each core repeatedly at <sec> intervals
-L <sec> List information repeatedly at <sec> intervals (need -l or -f, or both)
-M <freq> Set core maximum frequency. Can also use "max", "min", or "base"
-m <freq> Set core minimum frequency. Can also use "max", "min", or "base"
-s <freq> Set core frequency (within min and max)
-r <range> Range of cores to affect, e.g. 1-3,5,7
-g <governor> Set core governor (usually 'userspace')
-g <governor> Set core P-State governor (usually 'userspace')
-e <cstate> Enable core C-State
-d <cstate> Disable core C-State
-U <freq> Set uncore maximum frequency
Expand All @@ -79,16 +80,24 @@ Examples:

1. Set governor to ondemand, min 1GHz, max 2.5GHz, cores 0-10

/usr/local/bin/power.py -g ondemand -r 0-10 -M 2500 -m 1000
power.py -g ondemand -r 0-10 -M 2500 -m 1000

2. Set governor to userspace, cores 2 and 4 only, set freq to 2GHz

/usr/local/bin/power.py -g userspace -r 2,4 -s 2000
power.py -g userspace -r 2,4 -s 2000

3. Set governor to userspace, core 1, set freq to Turbo Boost
this assumes there's a 2501 and a 2500 freq available.
/usr/local/bin/power.py -g userspace -r 1 -M 2501 -s 2501
power.py -g userspace -r 1 -M 2501 -s 2501
4. Display information on the uncore
power.py -f
5. Display information about core and uncore every second
power.py -L 1 -lf
```
When executing the script without any command line parameters, the user is
Expand All @@ -109,7 +118,7 @@ presented with the following menu:
[8] Enable C-State for a range of cores
[9] Disable C-State for a range of cores
[10] Display Available Uncore Freqs
[10] Display Uncore Information
[11] Set Uncore Maximum for a range of cores
[12] Set Uncore Minimum for a range of cores
Expand Down Expand Up @@ -145,37 +154,57 @@ _Note: The output produced varies based on system configuration, not all governo
```bash
Option: 2
==== ================================ =============================== ========================
P-STATE INFO C-STATES DISABLED? UNCORE INFO
Core Max Min Now Governor POLL C1 C1E C6 Max Min Now
==== ====== ====== ====== =========== ======= ======= ======= ======= ======= ======== =======
0 3600 800 800 powersave no no no no 2500 800 800
1 3600 800 1900 powersave no no no no 2500 800 800
2 3600 800 799 powersave no no no no 2500 800 800
3 3600 800 1900 powersave no no no no 2500 800 800
4 3600 800 1900 powersave no no no no 2500 800 800
5 3600 800 1900 powersave no no no no 2500 800 800
6 3600 800 1900 powersave no no no no 2500 800 800
7 3600 800 800 powersave no no no no 2500 800 800
8 3600 800 1900 powersave no no no no 2500 800 800
9 3600 800 1900 powersave no no no no 2500 800 800
10 3600 800 800 powersave no no no no 2500 800 800
11 3600 800 1900 powersave no no no no 2500 800 800
12 3600 800 1900 powersave no no no no 2500 800 800
13 3600 800 1900 powersave no no no no 2500 800 800
14 3600 800 1900 powersave no no no no 2500 800 800
15 3600 800 1900 powersave no no no no 2500 800 800
16 3600 800 800 powersave no no no no 2500 800 800
17 3600 800 1900 powersave no no no no 2500 800 800
18 3600 800 1900 powersave no no no no 2500 800 800
19 3600 800 1900 powersave no no no no 2500 800 800
20 3600 800 1900 powersave no no no no 2500 800 800
21 3600 800 1900 powersave no no no no 2500 800 800
22 3600 800 1900 powersave no no no no 2500 800 800
==== ================================ ===============================
P-STATE INFO C-STATES DISABLED?
Core Max Min Now Governor POLL C1 C1E C6
==== ====== ====== ====== =========== ======= ======= ======= =======
0 1900 800 800 powersave no no no no
1 1900 800 800 powersave no no no no
2 1900 800 800 powersave no no no no
3 1900 800 800 powersave no no no no
4 1900 800 800 powersave no no no no
5 1900 800 800 powersave no no no no
6 1900 800 800 powersave no no no no
7 1900 800 800 powersave no no no no
8 1900 800 800 powersave no no no no
9 1900 800 800 powersave no no no no
10 1900 800 800 powersave no no no no
11 1900 800 800 powersave no no no no
12 800 800 800 performance no no no no
13 800 800 800 performance no no no no
14 800 800 800 performance no no no no
15 800 800 800 performance no no no no
16 800 800 800 performance no no no no
17 800 800 800 performance no no no no
18 800 800 766 performance no no no no
19 800 800 800 performance no no no no
20 800 800 800 performance no no no no
21 800 800 800 performance no no no no
22 800 800 800 performance no no no no
23 800 800 800 performance no no no no
24 800 800 800 performance no no no no
Press enter to continue ...
```
[10] Display Uncore Information
```bash
Option: 10
================== ========== ======== ========================== ==============
Uncore freq
Uncore Identifier package Id Die ID Min Max Current Core list
================== ========== ======== ========================== ==============
package_00_die_00 0 0 1800 1800 1800 0-23
package_01_die_00 1 0 1800 1800 1800 24-47
Available uncore freqs: [2000, 1900, 1800, 1700, 1600, 1500, 1400, 1300, 1200, 1100, 1000, 900, 800]
Press enter to continue ...
```
The remaining options allow settings of P-States (core frequency) and
C-States (core sleep states)
The remaining options allow settings of P-States (core frequency),
C-States (core sleep states) and uncore frequency.
# Working with P-States
Expand Down Expand Up @@ -244,6 +273,8 @@ of Uncore Frequencies and also displays available Uncore Frequencies.
Option: 11
Available uncore freqs: [2500, 2400, 2300, 2200, 2100, 2000, 1900, 1800, 1700, 1600, 1500, 1400, 1300, 1200, 1100, 1000, 900, 800]
Input UncoreFreq: 2000
Set maximum uncore frequency to 2000 for package_00_die_00
Set maximum uncore frequency to 2000 for package_01_die_00
Press enter to continue ...
```
Expand Down
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