Messages in this thread | | | Date | Wed, 15 Apr 2020 00:25:12 +0200 | From | Peter Zijlstra <> | Subject | Re: [RFC][PATCH 00/36] objtool: Make recordmcount a subcommand |
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On Tue, Apr 14, 2020 at 05:47:02PM -0400, Steven Rostedt wrote: > On Tue, 14 Apr 2020 23:17:54 +0200 > Peter Zijlstra <peterz@infradead.org> wrote: > > > > Do we want that? Matters how long that takes. > > > > We do want that, however it is conditional on CONFIG_DEBUG_ENTRY and > > does some rather specific validation. On a defconfig based kernel it > > takes ~2.5 seconds, significantly more an an allyesconfig. > > Is that timed on your laptop, or on the monster machine you normally do your > builds on? > > 2.5 seconds for you may be 2.5 minutes for others! ;-)
Final link pass, and objtool, is single threaded, the ~2.5s were on an old-ish 2.8GHz part, ie, most laptops are faster today.
The machine has a few more cores than laptops have, so total build time is still managable, unlike laptops. Also, it being a server part, it suffers less thermal issues.
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