On 7/29/19 3:40 PM, Stephen Rothwell wrote: > Hi Denis, > > On Mon, 29 Jul 2019 12:16:29 +0300 Denis Efremov <efremov@xxxxxxxxx> wrote: >> >>> Just a reminder that some of us (just me?) do well over 100+ builds per >>> day ... if this can be optimised some what that would be good. >> >> These measurements for the worst case (allmodconfig). Is it possible to >> measure the slowdown in your case? How it will perform on your typical >> workflow? > > I did 3 x86_64 allmodconfig builds without and with the patch (I do > -j 80 powerpc64 le hosted cross builds) and it doesn't look like the > patch has much impact at all. > > Without the patch: > > real 8m41.390s user 587m25.249s sys 22m0.411s > real 8m40.100s user 587m32.148s sys 21m58.419s > real 8m40.084s user 587m25.311s sys 22m2.794s > > With the patch: > > real 8m40.351s user 587m21.819s sys 21m57.389s > real 8m40.868s user 587m23.730s sys 21m58.737s > real 8m40.970s user 587m22.525s sys 22m2.467s > > I do other builds as well, but that is the biggest, so actually looks > ok. > Is it worth to include your measurements instead of mine in the commit description? Maybe the note about performance downgrade could be omitted at all in this case? Denis
