Re: Is it possible to choose the *preferred* core?

Dear Folks

If you notice all threads are running in a specific cpu, you might
consider disabling it.
For example, below patch will disable the cpu3 during boot-up progress.
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 5b4440d..14cce91 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -510,7 +510,7 @@ static int _cpu_up(unsigned int cpu, int tasks_frozen)

        cpu_hotplug_begin();

-       if (cpu_online(cpu) || !cpu_present(cpu)) {
+       if ( (cpu == 3) ||  cpu_online(cpu) || !cpu_present(cpu)) {
                ret = -EINVAL;
                goto out;
        }

2018-02-14 20:06 GMT+09:00 Dark Penguin <[email protected]>:
> Greetings!
>
> I have a pretty hot quad-core CPU, and one core is running significantly
> colder than others. Under load, it only approaches the idle temperature
> for the rest of the cores.
>
> Is it possible to assign all threads to this core by default, but use
> other cores when one is not enough? Or maybe even all "heavy" threads,
> if having all cores under 1% load is better in terms of temperature than
> cramming them all into one core. (I'm not sure if it is.)
>
>
> --
> darkpenguin
> --
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