Bug 253119 - Loss of deep CPU throttling after upgrade from 12-STABLE to 13-STABLE
Summary: Loss of deep CPU throttling after upgrade from 12-STABLE to 13-STABLE
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 13.0-STABLE
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-bugs (Nobody)
URL:
Keywords: regression
Depends on:
Blocks:
 
Reported: 2021-01-31 11:07 UTC by jakub_lach
Modified: 2023-08-29 21:58 UTC (History)
0 users

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Description jakub_lach 2021-01-31 11:07:53 UTC 
CPU is Core2Duo T9900 (Penryn), prior I had 100 MHz available, now it starts with 800 MHz. I have "device acpi" in kernconf, should I add acpi_throttle?
Comment 1 jakub_lach 2021-01-31 23:32:45 UTC 
FWIW, C1-C3 states are still present and one could argue that deep speed throttling provided no additional benefit, (hint.acpi_throttle.0.disabled=1 argument), yet it was nice to have and I grew accustomed to it (idling CPU was 100 MHz yet scaled very responsively under load to full speed).
Comment 2 jakub_lach 2021-02-01 09:06:58 UTC 
(In reply to jakub_lach from comment #1)
 dmesg -a

<...>

coretemp0: <CPU On-Die Thermal Sensors> on cpu0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0

<...>
Comment 3 jakub_lach 2023-08-29 21:58:28 UTC 
(In reply to jakub_lach from comment #0)

FWIW, 14-STABLE changed increments and scales to dev.cpu.0.freq: 349 with P9700.