Is the single online Cpu core used to reenable computer wakeup

fixit7

11/21/23, 2:01 PM

I ran this. My computer has 4 cores. Is CPU 4, which never went offline, what is used to re-enable the computer to wake itself back up?

sudo rtcwake -m mem -s 10
[sudo] password for andy: 
rtcwake: assuming RTC uses UTC ...
rtcwake: wakeup from "mem" using /dev/rtc0 at Mon Nov 21 13:49:29 2022


Nov 21 07:49:18 7 kernel: [ 2307.744199] PM: suspend entry (deep)
Nov 21 07:49:18 7 kernel: [ 2307.752581] Filesystems sync: 0.008 seconds
Nov 21 07:49:31 7 kernel: [ 2307.942433] Freezing user space processes ... (elapsed 0.002 seconds) done.
Nov 21 07:49:31 7 kernel: [ 2307.944834] OOM killer disabled.
Nov 21 07:49:31 7 kernel: [ 2307.944835] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Nov 21 07:49:31 7 kernel: [ 2307.946226] printk: Suspending console(s) (use no_console_suspend to debug)
Nov 21 07:49:31 7 kernel: [ 2307.954902] r8169 0000:01:00.0 enp1s0: Link is Down
Nov 21 07:49:31 7 kernel: [ 2307.973626] sd 0:0:0:0: [sda] Synchronizing SCSI cache
Nov 21 07:49:31 7 kernel: [ 2307.973863] sd 0:0:0:0: [sda] Stopping disk
Nov 21 07:49:31 7 kernel: [ 2307.989646] sd 1:0:0:0: [sdb] Synchronizing SCSI cache
Nov 21 07:49:31 7 kernel: [ 2307.989948] sd 1:0:0:0: [sdb] Stopping disk
Nov 21 07:49:31 7 kernel: [ 2308.433707] ACPI: PM: Preparing to enter system sleep state S3
Nov 21 07:49:31 7 kernel: [ 2308.434537] ACPI: PM: Saving platform NVS memory
Nov 21 07:49:31 7 kernel: [ 2308.434590] Disabling non-boot CPUs ...
Nov 21 07:49:31 7 kernel: [ 2308.436592] smpboot: CPU 1 is now offline
Nov 21 07:49:31 7 kernel: [ 2308.439543] smpboot: CPU 2 is now offline
Nov 21 07:49:31 7 kernel: [ 2308.442190] smpboot: CPU 3 is now offline

0 + 0

suspend

cpu

rtc

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Is the single online Cpu core used to reenable computer wakeup

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