Messages in this thread | | | Subject | Re: [ 11/37] sched/nohz: Rewrite and fix load-avg computation -- again | From | Peter Zijlstra <> | Date | Fri, 20 Jul 2012 19:25:39 +0200 |
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On Fri, 2012-07-20 at 12:13 -0500, Jonathan Nieder wrote: > Peter Zijlstra wrote: > > On Tue, 2012-07-17 at 19:16 -0500, Jonathan Nieder wrote: > > >> I'm thrilled to see this regression fix for stable@, but are we really > >> really sure that it won't cause new regressions? > > > > Doug Smythies ran a ~68 hour test on it, running various synthetic loads > > of various frequencies against it and comparing the reported load > > averages against the expected values and found it to be 'good'. > > > > This doesn't guarantee we won't find more 'interesting' problems in > > there, but it does give me fair confidence in it. > > Yeah, that sounds good. Very nice to hear. > > Is the code to generate the synthetic loads and expected results > somewhere easy to find (like LTP or tools/testing) to make it easier > to keep this code working well in the future?
/me finds Doug isn't actually on the CC, /me fixes.
Doug had this web-page with all his testing activities, graphs and code etc..
http://www.smythies.com/~doug/network/load_average/
Seems to still work.
Last time I tried his scripts they weren't very user friendly, and afaik he's making the pretty graphs 'manually'. But whatever he's got is there I think.
If someone wants to take it and make it pretty and 'usable' for people in a hurry I'm sure Doug wouldn't mind.
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