From: bugzilla-daemon@bugzilla.kernel.org
To: cpufreq@vger.kernel.org
Subject: [Bug 100771] When activating ignore_nice_load with governor ondemand performance drops for normal processes.
Date: Wed, 16 Dec 2015 15:11:33 +0000 [thread overview]
Message-ID: <bug-100771-12968-Kb0rsx8GLH@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-100771-12968@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=100771
--- Comment #3 from Chen Yu <yu.c.chen@intel.com> ---
This is a normal behavior IMO.
1. task_b with nice = 1 does not mean task_a will always occupy the time slice,
it is CFS scheduler, which means even task with nice = 19 will get chance to
run.
2.When you enable ignore_nice_load, the task_b with nice = 1 will be considered
to be idle, which means that, the total time task_b is running, will be added
to current cpu's idle time, which will cause the cpufreq governor to treat the
cpu load lower than when ignore_nice_load disabled.
Yu
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next prev parent reply other threads:[~2015-12-16 15:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-100771-12968@https.bugzilla.kernel.org/>
2015-07-08 5:58 ` [Bug 100771] When activating ignore_nice_load with governor ondemand performance drops for normal processes bugzilla-daemon
2015-12-16 15:11 ` bugzilla-daemon [this message]
2015-12-16 16:26 ` bugzilla-daemon
2015-12-17 2:27 ` bugzilla-daemon
2015-12-17 8:33 ` bugzilla-daemon
2015-12-17 9:09 ` bugzilla-daemon
2015-12-23 6:40 ` bugzilla-daemon
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