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Date: Fri, 13 Nov 2020 17:22:47 +0800 From: "Ning, Hongyu" <hongyu.ning@...ux.intel.com> To: Joel Fernandes <joel@...lfernandes.org>, Nishanth Aravamudan <naravamudan@...italocean.com>, Julien Desfossez <jdesfossez@...italocean.com>, Peter Zijlstra <peterz@...radead.org>, Tim Chen <tim.c.chen@...ux.intel.com>, Vineeth Pillai <viremana@...ux.microsoft.com>, Aaron Lu <aaron.lwe@...il.com>, Aubrey Li <aubrey.intel@...il.com>, tglx@...utronix.de, linux-kernel@...r.kernel.org Cc: mingo@...nel.org, torvalds@...ux-foundation.org, fweisbec@...il.com, keescook@...omium.org, kerrnel@...gle.com, Phil Auld <pauld@...hat.com>, Valentin Schneider <valentin.schneider@....com>, Mel Gorman <mgorman@...hsingularity.net>, Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>, Paolo Bonzini <pbonzini@...hat.com>, vineeth@...byteword.org, Chen Yu <yu.c.chen@...el.com>, Christian Brauner <christian.brauner@...ntu.com>, Agata Gruza <agata.gruza@...el.com>, Antonio Gomez Iglesias <antonio.gomez.iglesias@...el.com>, graf@...zon.com, konrad.wilk@...cle.com, dfaggioli@...e.com, pjt@...gle.com, rostedt@...dmis.org, derkling@...gle.com, benbjiang@...cent.com, Alexandre Chartre <alexandre.chartre@...cle.com>, James.Bottomley@...senpartnership.com, OWeisse@...ch.edu, Dhaval Giani <dhaval.giani@...cle.com>, Junaid Shahid <junaids@...gle.com>, jsbarnes@...gle.com, chris.hyser@...cle.com, Aubrey Li <aubrey.li@...ux.intel.com>, "Paul E. McKenney" <paulmck@...nel.org>, Tim Chen <tim.c.chen@...el.com> Subject: Re: [RFT for v9] (Was Re: [PATCH v8 -tip 00/26] Core scheduling) On 2020/11/7 4:55, Joel Fernandes wrote: > All, > > I am getting ready to send the next v9 series based on tip/master > branch. Could you please give the below tree a try and report any results in > your testing? > git tree: > https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git (branch coresched) > git log: > https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git/log/?h=coresched > > The major changes in this series are the improvements: > (1) > "sched: Make snapshotting of min_vruntime more CGroup-friendly" > https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git/commit/?h=coresched-v9-for-test&id=9a20a6652b3c50fd51faa829f7947004239a04eb > > (2) > "sched: Simplify the core pick loop for optimized case" > https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git/commit/?h=coresched-v9-for-test&id=0370117b4fd418cdaaa6b1489bfc14f305691152 > > And a bug fix: > (1) > "sched: Enqueue task into core queue only after vruntime is updated" > https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git/commit/?h=coresched-v9-for-test&id=401dad5536e7e05d1299d0864e6fc5072029f492 > > There are also 2 more bug fixes that I squashed-in related to kernel > protection and a crash seen on the tip/master branch. > > Hoping to send the series next week out to the list. > > Have a great weekend, and Thanks! > > - Joel > > > On Mon, Oct 19, 2020 at 09:43:10PM -0400, Joel Fernandes (Google) wrote: Adding 4 workloads test results for core scheduling v9 candidate: - kernel under test: -- coresched community v9 candidate from https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git (branch coresched) -- latest commit: 2e8591a330ff (HEAD -> coresched, origin/coresched) NEW: sched: Add a coresched command line option -- coresched=on kernel parameter applied - workloads: -- A. sysbench cpu (192 threads) + sysbench cpu (192 threads) -- B. sysbench cpu (192 threads) + sysbench mysql (192 threads, mysqld forced into the same cgroup) -- C. uperf netperf.xml (192 threads over TCP or UDP protocol separately) -- D. will-it-scale context_switch via pipe (192 threads) - test machine setup: CPU(s): 192 On-line CPU(s) list: 0-191 Thread(s) per core: 2 Core(s) per socket: 48 Socket(s): 2 NUMA node(s): 4 - test results, no obvious performance drop compared to community v8 build: -- workload A: +----------------------+------+----------------------+------------------------+ | | ** | sysbench cpu * 192 | sysbench cpu * 192 | +======================+======+======================+========================+ | cgroup | ** | cg_sysbench_cpu_0 | cg_sysbench_cpu_1 | +----------------------+------+----------------------+------------------------+ | record_item | ** | Tput_avg (events/s) | Tput_avg (events/s) | +----------------------+------+----------------------+------------------------+ | coresched_normalized | ** | 0.98 | 1.01 | +----------------------+------+----------------------+------------------------+ | default_normalized | ** | 1 | 1 | +----------------------+------+----------------------+------------------------+ | smtoff_normalized | ** | 0.59 | 0.6 | +----------------------+------+----------------------+------------------------+ -- workload B: +----------------------+------+----------------------+------------------------+ | | ** | sysbench cpu * 192 | sysbench mysql * 192 | +======================+======+======================+========================+ | cgroup | ** | cg_sysbench_cpu_0 | cg_sysbench_mysql_0 | +----------------------+------+----------------------+------------------------+ | record_item | ** | Tput_avg (events/s) | Tput_avg (events/s) | +----------------------+------+----------------------+------------------------+ | coresched_normalized | ** | 1.02 | 0.78 | +----------------------+------+----------------------+------------------------+ | default_normalized | ** | 1 | 1 | +----------------------+------+----------------------+------------------------+ | smtoff_normalized | ** | 0.59 | 0.75 | +----------------------+------+----------------------+------------------------+ -- workload C: +----------------------+------+---------------------------+---------------------------+ | | ** | uperf netperf TCP * 192 | uperf netperf UDP * 192 | +======================+======+===========================+===========================+ | cgroup | ** | cg_uperf | cg_uperf | +----------------------+------+---------------------------+---------------------------+ | record_item | ** | Tput_avg (Gb/s) | Tput_avg (Gb/s) | +----------------------+------+---------------------------+---------------------------+ | coresched_normalized | ** | 0.65 | 0.67 | +----------------------+------+---------------------------+---------------------------+ | default_normalized | ** | 1 | 1 | +----------------------+------+---------------------------+---------------------------+ | smtoff_normalized | ** | 0.83 | 0.91 | +----------------------+------+---------------------------+---------------------------+ -- workload D: +----------------------+------+-------------------------------+ | | ** | will-it-scale * 192 | | | | (pipe based context_switch) | +======================+======+===============================+ | cgroup | ** | cg_will-it-scale | +----------------------+------+-------------------------------+ | record_item | ** | threads_avg | +----------------------+------+-------------------------------+ | coresched_normalized | ** | 0.29 | +----------------------+------+-------------------------------+ | default_normalized | ** | 1.00 | +----------------------+------+-------------------------------+ | smtoff_normalized | ** | 0.87 | +----------------------+------+-------------------------------+ - notes on test results record_item: * coresched_normalized: smton, cs enabled, test result normalized by default value * default_normalized: smton, cs disabled, test result normalized by default value * smtoff_normalized: smtoff, test result normalized by default value Hongyu
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