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Date: Mon, 16 May 2016 16:38:09 -0400
From: Luiz Capitulino <lcapitulino@redhat.com>
To: Daniel Wagner <wagi@monom.org>
Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
        "Peter Zijlstra (Intel)" <peterz@infradead.org>,
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        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Daniel Wagner <daniel.wagner@bmw-carit.de>
Subject: Re: [PATCH v2] sched/completion: convert completions to use simple
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On Thu, 12 May 2016 16:08:34 +0200
Daniel Wagner <wagi@monom.org> wrote:

> In short, I haven't figured out yet why the kernel builds get slightly slower. 

You're doing make -j 200, right? How many cores do you have? Couldn't it
be that you're saturating your CPUs?

You could try make -j<NR CPUs>, or some process creation benchmark. Although
I don't know what's the best way to measure this.