[lkml]   [2022]   [Aug]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [LKP] Re: [xfs] 016a23388c: stress-ng.xattr.ops_per_sec 58.4% improvement
Hi Dave,

On 8/3/2022 9:02 AM, Dave Chinner wrote:
> That a single cacheline miss avoids all the spinlock contention is
> just pure luck - it'll come back if other work is being done on the
> machine that consumes enough memory bandwidth to push this back over
> the edge.

Agree. We did see some strange performance boost which can't be connected
to the code change. And worried later unrelated change reduce the
mysterious performance gain (and report it as regression).

Yin, Fengwei

 \ /
  Last update: 2022-08-03 16:11    [W:0.091 / U:1.800 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site