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Linux offline individual non boot CPU in SMP cortex-CA7

ilchang

Hi, Sir

 

        We hope to do offline individual non-boot CPU of SMP cortex-CA7 in Linux.

        But CPU0 is always alive.

        Could we just save/restore non-boot CPU registers and let the specified CPU power down/wake up ?

        Does this result to unstable status to Linux ?

        Thank you for your help.

 

Best Regards,

Alex

Parents
  • 0 in reply to Willy Wolff

    Thank for the reply.

    Is it possible to let Linux run routine tasks on CPU0 after Linux booting ?

    We tried cpuidle framework and implemented cpuidle driver.

    But after booted up, the time of CPU0 in sleep state is more than some of other CPUs.

    We wonder that some routine tasks are not run on CPU0 defaultly.

    Thank you for your help.

    Best Regards,

    Alex

Reply
  • 0 in reply to Willy Wolff

    Thank for the reply.

    Is it possible to let Linux run routine tasks on CPU0 after Linux booting ?

    We tried cpuidle framework and implemented cpuidle driver.

    But after booted up, the time of CPU0 in sleep state is more than some of other CPUs.

    We wonder that some routine tasks are not run on CPU0 defaultly.

    Thank you for your help.

    Best Regards,

    Alex

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