Re: [PATCH -V11 2/9] mm/migrate: update node demotion order on hotplug events

[Dave Hansen]

On 2/24/22 15:37, Abhishek Goel wrote:
> 
> On 24/02/22 05:35, Dave Hansen wrote:
>> On 2/23/22 15:02, Abhishek Goel wrote:
>>> If needed, I will provide experiment results and traces that were used
>>> to conclude this.
>> It would be great if you can provide some more info.  Even just a CPU
>> time profile would be helpful.
> 
> Average total time taken for SMT=8 to SMT=1 in v5.14 : 20s
> 
> Average total time taken for SMT=8 to SMT=1 in v5.15 : 36s
> 
> (Observed in system with 150+ CPUs )

I was kinda thinking of:

	perf record / perf report

output.  Not wall clock time.  We need to know what the kernel is doing
during those extra 16 seconds.