lkml.org 
[lkml]   [2018]   [Jul]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v6 0/7] fs/dcache: Track & limit # of negative dentries
On Fri, Jul 06, 2018 at 03:32:45PM -0400, Waiman Long wrote:

> With a 4.18 based kernel, the positive & negative dentries lookup rates
> (lookups per second) after initial boot on a 2-socket 24-core 48-thread
> 64GB memory system with and without the patch were as follows: `
>
> Metric w/o patch neg_dentry_pc=0 neg_dentry_pc=1
> ------ --------- --------------- ---------------
> Positive dentry lookup 584299 586749 582670
> Negative dentry lookup 1422204 1439994 1438440
> Negative dentry creation 643535 652194 641841
>
> For the lookup rate, there isn't any signifcant difference with or
> without the patch or with a zero or non-zero value of neg_dentry_pc.

Sigh... What I *still* don't see (after all the iterations of the patchset)
is any performance data on workloads that would be likely to feel the impact.
Anything that seriously hits INCLUDE_PATH, for starters...

\
 
 \ /
  Last update: 2018-07-07 00:29    [W:0.069 / U:11.964 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site