Re: [linus:master] [x86] 4817f70c25: stress-ng.mmapaddr.ops_per_sec 63.0% regression

[Rik van Riel]

On Thu, 2025-01-30 at 01:33 +0800, Qi Zheng wrote:
> 
> stress-ng: info:  [671] stressor       bogo ops real time  usr time 
> sys 
> time   bogo ops/s   bogo ops/s
> stress-ng: info:  [671]                           (secs)    (secs) 
> (secs)   (real time) (usr+sys time)
> stress-ng: info:  [671] mmapaddr       19803127     60.01    235.20 
> 1146.76    330007.29     14329.74

How stable are these numbers?

It looks like the bogo ops/s number without the local_bh_disable
was 17233711, while the number is 19803127 after.

That looks like a 14% speedup.

This is not back to the 28440843 you had before 
MMU_GATHER_RCU_TABLE_FREE was enabled unconditionally,
but it does reduce the size of the regression
considerably, from 40% to 31%.

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