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To:     Julien Desfossez <jdesfossez@digitalocean.com>
Cc:     Vineeth Remanan Pillai <vpillai@digitalocean.com>,
        Nishanth Aravamudan <naravamudan@digitalocean.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Paul Turner <pjt@google.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        Dario Faggioli <dfaggioli@suse.com>,
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        Aaron Lu <aaron.lwe@gmail.com>,
        Aubrey Li <aubrey.intel@gmail.com>,
        Valentin Schneider <valentin.schneider@arm.com>,
        Mel Gorman <mgorman@techsingularity.net>,
        Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
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From:   Tim Chen <tim.c.chen@linux.intel.com>
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Subject: Re: [RFC PATCH v4 00/19] Core scheduling v4
Message-ID: <29d43466-1e18-6b42-d4d0-20ccde20ff07@linux.intel.com>
Date:   Thu, 13 Feb 2020 10:37:04 -0800
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Sender: linux-kernel-owner@vger.kernel.org
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On 2/12/20 3:07 PM, Julien Desfossez wrote:

>>
>> Have you guys been able to make progress on the issues with I/O intensive workload?
> 
> I finally have some results with the following branch:
> https://github.com/digitalocean/linux-coresched/tree/coresched/v4-v5.5.y
> 
> 
> So the main conclusion is that for all the test cases we have studied,
> core scheduling performs better than nosmt ! This is different than what
> we tested a while back, so it's looking really good !

Thanks for the data.  They look really encouraging.

Aubrey is working on updating his patches so it will load balance
to the idle cores a bit better.  We are testing those and will post
the update soon.

Tim