https://bugzilla.kernel.org/show_bug.cgi?id=209617
Bug ID: 209617
Summary: tick_sched_timer wapes up the CPU 300+ times per
second
Product: ACPI
Version: 2.5
Kernel Version: 5.8.14
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Interrupts
Assignee: [email protected]
Reporter: [email protected]
Regression: No
I'm using a Lenovo X1 Yoga gen 3 laptop and am experiencing persistently low
battery life (see Bug 208191). While troubleshooting that, I discovered with
powertop that tick_sched_timer is consistently listed as having 300+ events per
second. This is the typical output of powertop on my system:
Summary: 1584.2 wakeups/second, 0.0 GPU ops/seconds, 0.0 VFS ops/sec and 71.8%
CPU use
Power est. Usage Events/s Category Description
3.75 W 45.0% Device Display backlight
1.37 W 6.7 ms/s 331.6 Timer tick_sched_timer
This seems inappropriate.
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