Re: [PATCH] modpost: check for static EXPORT_SYMBOL* functions

Stephen Rothwell
2019-07-29T12:40:11Z

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Hi Denis,

On Mon, 29 Jul 2019 12:16:29 +0300 Denis Efremov <efremov@linux.com> 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.
--
Cheers,
Stephen Rothwell

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