Are my CPUs really shutting down during suspension?

archielogist · 2022-11-16 23:51:29

All these entries are from time 12:34. That's when I put my computer to sleep.

systemd-logind[589]: Power key pressed short.
systemd-logind[589]: The system will suspend now!
systemd[1]: Reached target Sleep.
systemd[1]: Starting System Suspend...
systemd-sleep[7008]: Entering sleep state 'suspend'...
kernel: PM: suspend entry (deep)
kernel: Filesystems sync: 0.011 seconds

The following entries are all from the time 20:12.. there are no logs between the snippbets above and below.

Wy computer woke up spontaneously as it tends to do... I wonder if it has anythiang to do with low batteries.
Anyway.. that's not relevant right now.

kernel: Freezing user space processes ... (elapsed 0.001 seconds) done.
kernel: OOM killer disabled.
kernel: Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
kernel: printk: Suspending console(s) (use no_console_suspend to debug)
kernel: wlan0: deauthenticating from XXXX by local choice (Reason: 3=DEAUTH_LE>
kernel: ACPI: EC: interrupt blocked
kernel: ACPI: PM: Preparing to enter system sleep state S3
kernel: ACPI: EC: event blocked
kernel: ACPI: EC: EC stopped
kernel: ACPI: PM: Saving platform NVS memory
kernel: Disabling non-boot CPUs ...
kernel: smpboot: CPU 1 is now offline
kernel: smpboot: CPU 2 is now offline
kernel: smpboot: CPU 3 is now offline
kernel: smpboot: CPU 4 is now offline
kernel: smpboot: CPU 5 is now offline
kernel: smpboot: CPU 6 is now offline
kernel: smpboot: CPU 7 is now offline
kernel: [Firmware Bug]: TSC ADJUST differs: CPU0 0 --> -55686682. Restoring
kernel: ACPI: PM: Low-level resume complete
kernel: ACPI: EC: EC started
kernel: ACPI: PM: Restoring platform NVS memory
kernel: Enabling non-boot CPUs ...
kernel: x86: Booting SMP configuration:
kernel: smpboot: Booting Node 0 Processor 1 APIC 0x2
kernel: CPU1 is up
kernel: smpboot: Booting Node 0 Processor 2 APIC 0x4
kernel: CPU2 is up
kernel: smpboot: Booting Node 0 Processor 3 APIC 0x6
kernel: CPU3 is up
kernel: smpboot: Booting Node 0 Processor 4 APIC 0x1
kernel: CPU4 is up
kernel: smpboot: Booting Node 0 Processor 5 APIC 0x3
kernel: CPU5 is up
kernel: smpboot: Booting Node 0 Processor 6 APIC 0x5
kernel: CPU6 is up
kernel: smpboot: Booting Node 0 Processor 7 APIC 0x7
kernel: CPU7 is up
kernel: ACPI: PM: Waking up from system sleep state S3
kernel: ACPI: EC: interrupt unblocked
kernel: ACPI: EC: event unblocked

So it seems to me that he CPUs are shut down (and then started again) when the computer (laptop) is waking up from suspension.
According to the log, the CPUs were never turned off during the suspension.

Was the log just lagging behind or did my CPUs never go into suspension mode?

cfr · 2022-11-17 00:40:37

That looks normal to me. I've always assumed it is just that the journal can't be written when the CPUs go offline.

Arch Linux

#1 2022-11-16 23:51:29

Are my CPUs really shutting down during suspension?

#2 2022-11-17 00:40:37

Re: Are my CPUs really shutting down during suspension?

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