From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>,
paolo <paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Fabio Checconi
<fchecconi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Arianna Avanzini
<avanzini.arianna-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Paolo Valente <posta_paolo-whZMOeQn8C0@public.gmane.org>
Subject: Re: [PATCH RFC RESEND 00/14] New version of the BFQ I/O Scheduler
Date: Fri, 30 May 2014 13:39:17 -0400 [thread overview]
Message-ID: <20140530173917.GJ24871@htj.dyndns.org> (raw)
In-Reply-To: <20140530173146.GG16605-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Fri, May 30, 2014 at 01:31:46PM -0400, Vivek Goyal wrote:
> > What allows BFQ to provide the above features is its accurate
> > scheduling engine (patches 1-4), combined with a set of simple
> > heuristics and improvements (patches 5-14).
>
> This is very hard to understand. This puzzle need to be broken down
> into small pieces and explained in simple design terms so that even
> 5 years down the line I can explain why BFQ was better.
Vivek, stop wasting people's time and just go study the paper. Let's
*please* talk after that. What do you expect him to do? Copy & paste
the whole paper here and walk you through each step of it? He
presented as much information as he could and then provided sufficient
summary in the head message and as comments in the implementation.
It's now *your* turn to study what has been presented. Sure, if you
have further questions or think that the implementation and patches
need more documentation, that's completely fine but I find it
ridiculous that you're demanding to be spoon-fed information which is
readily available in an easily consumable form. Seriously, this is
the best documentation we've had in this area *EVER*.
--
tejun
next prev parent reply other threads:[~2014-05-30 17:39 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-27 12:42 [PATCH RFC RESEND 00/14] New version of the BFQ I/O Scheduler paolo
[not found] ` <1401194558-5283-1-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-27 12:42 ` [PATCH RFC RESEND 01/14] block: kconfig update and build bits for BFQ paolo
[not found] ` <1401194558-5283-2-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-28 22:19 ` Tejun Heo
[not found] ` <20140528221929.GG1419-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 06/12] block, bfq: improve responsiveness Paolo Valente
[not found] ` <1401354343-5527-7-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:41 ` Tejun Heo
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 09/12] block, bfq: reduce latency during request-pool saturation Paolo Valente
[not found] ` <1401354343-5527-10-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-31 13:54 ` Tejun Heo
[not found] ` <20140531135402.GC24557-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-06-02 9:54 ` Paolo Valente
[not found] ` <1401354343-5527-1-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 01/12] block: introduce the BFQ-v0 I/O scheduler Paolo Valente
[not found] ` <1401354343-5527-2-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:36 ` Tejun Heo
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 02/12] block, bfq: add full hierarchical scheduling and cgroups support Paolo Valente
[not found] ` <1401354343-5527-3-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:37 ` Tejun Heo
[not found] ` <20140530153718.GB24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 15:39 ` Tejun Heo
[not found] ` <20140530153943.GC24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 21:49 ` Paolo Valente
2014-05-30 21:49 ` Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 03/12] block, bfq: improve throughput boosting Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 04/12] block, bfq: modify the peak-rate estimator Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 05/12] block, bfq: add more fairness to boost throughput and reduce latency Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 07/12] block, bfq: reduce I/O latency for soft real-time applications Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 08/12] block, bfq: preserve a low latency also with NCQ-capable drives Paolo Valente
[not found] ` <1401354343-5527-9-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-31 13:48 ` Tejun Heo
[not found] ` <20140531134823.GB24557-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-06-02 9:58 ` Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 10/12] block, bfq: add Early Queue Merge (EQM) Paolo Valente
[not found] ` <1401354343-5527-11-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-01 0:03 ` Tejun Heo
[not found] ` <20140601000331.GA29085-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 9:46 ` Paolo Valente
[not found] ` <3B7B1A46-46EB-4C52-A52C-4F79C71D14C2-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-03 16:28 ` Tejun Heo
[not found] ` <20140603162844.GD26210-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-04 11:47 ` Paolo Valente
2014-06-04 13:04 ` Tejun Heo
[not found] ` <20140604130446.GA5004-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-16 11:23 ` Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 11/12] block, bfq: boost the throughput on NCQ-capable flash-based devices Paolo Valente
[not found] ` <1401354343-5527-12-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:46 ` Tejun Heo
[not found] ` <20140530154654.GE24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 22:01 ` Paolo Valente
2014-05-31 11:52 ` Tejun Heo
[not found] ` <20140531115216.GB5057-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 9:26 ` Paolo Valente
[not found] ` <36BFDB73-AEC2-4B87-9FD6-205E9431E722-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-03 17:11 ` Tejun Heo
[not found] ` <20140603171124.GE26210-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-04 7:29 ` Paolo Valente
[not found] ` <03CDD106-DB18-4E8F-B3D6-2AAD45782A06-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-04 13:56 ` Tejun Heo
[not found] ` <20140604135627.GB5004-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-16 10:46 ` Paolo Valente
[not found] ` <D163E069-ED77-4BF5-A488-9A90C41C60C1-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-19 1:14 ` Tejun Heo
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 12/12] block, bfq: boost the throughput with random I/O on NCQ-capable HDDs Paolo Valente
[not found] ` <1401354343-5527-13-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:51 ` Tejun Heo
2014-05-31 13:34 ` Tejun Heo
2014-05-30 16:07 ` [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler Tejun Heo
[not found] ` <20140530160712.GG24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 22:23 ` Paolo Valente
[not found] ` <464F6CBE-A63E-46EF-A90D-BF8450430444-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 23:28 ` Tejun Heo
[not found] ` <20140530232804.GA5057-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 23:54 ` Paolo Valente
2014-06-02 11:14 ` Pavel Machek
[not found] ` <20140602111432.GA3737-tWAi6jLit6GreWDznjuHag@public.gmane.org>
2014-06-02 13:02 ` Pavel Machek
[not found] ` <20140602130226.GA14654-tWAi6jLit6GreWDznjuHag@public.gmane.org>
2014-06-03 16:54 ` Paolo Valente
[not found] ` <FCFE0106-A4DD-4DEF-AAAE-040F3823A447-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-03 20:40 ` Pavel Machek
2014-06-04 8:39 ` Pavel Machek
2014-06-04 9:08 ` Pavel Machek
2014-06-04 10:03 ` BFQ speed tests [was Re: [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler] Pavel Machek
[not found] ` <20140604100358.GA4799-tWAi6jLit6GreWDznjuHag@public.gmane.org>
2014-06-04 10:24 ` Paolo Valente
[not found] ` <4888F93F-D58D-48DD-81A6-A6D61C452D92-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-04 11:59 ` Takashi Iwai
[not found] ` <s5hsink3mxk.wl%tiwai-l3A5Bk7waGM@public.gmane.org>
2014-06-04 12:12 ` Paolo Valente
2014-06-11 20:45 ` Paolo Valente
[not found] ` <6A4905B2-ACAA-419D-9C83-659BE9A5B20B-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-13 16:21 ` Takashi Iwai
2014-06-11 20:39 ` Paolo Valente
2014-06-02 17:33 ` [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler Tejun Heo
[not found] ` <20140602173332.GB8912-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-03 4:12 ` Mike Galbraith
2014-06-04 22:31 ` Pavel Machek
[not found] ` <20140604223152.GA7881-tWAi6jLit6GreWDznjuHag@public.gmane.org>
2014-06-05 2:14 ` Jens Axboe
2014-05-31 0:48 ` Jens Axboe
[not found] ` <538926F6.7080409-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-05-31 5:16 ` Tejun Heo
[not found] ` <20140531051635.GA19925-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-06-02 14:29 ` Jens Axboe
[not found] ` <538C8A47.1050502-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-02 17:24 ` Tejun Heo
[not found] ` <20140602172454.GA8912-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 17:32 ` Jens Axboe
[not found] ` <538CB515.3090700-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-02 17:42 ` Tejun Heo
[not found] ` <20140602174250.GC8912-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 17:46 ` Jens Axboe
[not found] ` <538CB87C.7030600-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-02 18:51 ` Tejun Heo
[not found] ` <20140602185138.GD8912-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 20:57 ` Jens Axboe
[not found] ` <20140602205713.GB8357-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-04 14:31 ` Christoph Hellwig
[not found] ` <20140604143136.GA1920-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-06-04 14:50 ` Tejun Heo
[not found] ` <20140604145053.GE5004-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-04 14:53 ` Christoph Hellwig
[not found] ` <20140604145330.GA2955-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-06-04 14:58 ` Tejun Heo
[not found] ` <20140604145829.GF5004-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-04 17:51 ` Christoph Hellwig
2014-06-17 15:55 ` Paolo Valente
[not found] ` <0A5218F8-0215-4B4F-959B-EE5AAEFC164A-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-19 1:46 ` Tejun Heo
[not found] ` <20140619014600.GA20100-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-06-19 1:49 ` Tejun Heo
2014-06-19 2:29 ` Jens Axboe
[not found] ` <53A24B1C.1070004-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-23 13:53 ` Paolo Valente
[not found] ` <8F719638-0CD7-4BD2-8F4F-088913A0EE2D-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-23 19:20 ` Tejun Heo
[not found] ` <20140623192022.GA19660-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-07-09 20:54 ` Paolo Valente
2014-05-27 12:42 ` [PATCH RFC RESEND 02/14] block: introduce the BFQ-v0 I/O scheduler paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 03/14] block: add hierarchical-support option to kconfig paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 04/14] block, bfq: add full hierarchical scheduling and cgroups support paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 05/14] block, bfq: improve throughput boosting paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 06/14] block, bfq: modify the peak-rate estimator paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 07/14] block, bfq: add more fairness to boost throughput and reduce latency paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 08/14] block, bfq: improve responsiveness paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 09/14] block, bfq: reduce I/O latency for soft real-time applications paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 10/14] block, bfq: preserve a low latency also with NCQ-capable drives paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 11/14] block, bfq: reduce latency during request-pool saturation paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 13/14] block, bfq: boost the throughput on NCQ-capable flash-based devices paolo
2014-05-27 12:42 ` [PATCH RFC RESEND 14/14] block, bfq: boost the throughput with random I/O on NCQ-capable HDDs paolo
2014-05-30 15:32 ` [PATCH RFC RESEND 00/14] New version of the BFQ I/O Scheduler Vivek Goyal
[not found] ` <20140530153228.GE16605-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-30 16:16 ` Tejun Heo
[not found] ` <20140530161650.GH24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 17:09 ` Vivek Goyal
[not found] ` <20140530170958.GF16605-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-30 17:26 ` Tejun Heo
[not found] ` <20140530172609.GI24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 17:55 ` Vivek Goyal
[not found] ` <20140530175527.GH16605-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-30 17:59 ` Tejun Heo
2014-05-30 23:33 ` Paolo Valente
2014-05-30 17:31 ` Vivek Goyal
[not found] ` <20140530173146.GG16605-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-30 17:39 ` Tejun Heo [this message]
2014-05-27 12:42 ` [PATCH RFC RESEND 12/14] block, bfq: add Early Queue Merge (EQM) paolo
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