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Date: Wed, 13 Dec 2017 17:03:57 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
        Ingo Molnar <mingo@redhat.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
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        Juri Lelli <juri.lelli@redhat.com>, Todd Kjos <tkjos@android.com>,
        Joel Fernandes <joelaf@google.com>
Subject: Re: [PATCH v2 0/4] Utilization estimation (util_est) for FAIR tasks
Message-ID: <20171213160357.3se4vvyo5lqud2uo@hirez.programming.kicks-ass.net>
References: <20171205171018.9203-1-patrick.bellasi@arm.com>
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On Tue, Dec 05, 2017 at 05:10:14PM +0000, Patrick Bellasi wrote:
> With this feature enabled, the measured overhead is in the range of ~1%
> on the same HW/SW test configuration.

That's quite a lot; did you look where that comes from?