> Il giorno 03 mag 2017, alle ore 10:00, Sedat Dilek <sedat.dilek@xxxxxxxxx> ha scritto: > > On Tue, May 2, 2017 at 2:16 PM, Markus Trippelsdorf > <markus@xxxxxxxxxxxxxxx> wrote: >> On 2017.05.02 at 14:07 +0200, Sedat Dilek wrote: >>> On Tue, May 2, 2017 at 10:00 AM, Markus Trippelsdorf >>> <markus@xxxxxxxxxxxxxxx> wrote: >>>> On 2017.05.02 at 09:54 +0200, Sedat Dilek wrote: >>>>> Hi, >>>>> >>>>> I want to play with BFQ. >>>>> >>>>> My base is block-next as of 28-Apr-2017. >>> [...] >>>>> Not sure if the attached patches make sense (right now). >>>> >>>> No, it doesn't make sense at all. >>> >>> Hmm, I looked at 4.11.0-v8r11 and 0001 has exactly what my 2 patches do :-). >> >> BFQ started as a conventional scheduler. But because mq is the way of >> the future it was ported before it was accepted into mainline. >> > > I am still playing and want to do my own experiences with BFQ. > > Not sure if FIO is a good testcase-tool here. > If you want to perform a thorough benchmarking of also responsiveness and latency for time-sensitive applications (such as video playing) then you may want to use S [1]. It's rather rustic, do ask if you encounter any difficulty. [1] https://github.com/Algodev-github/S > So if MQ is the way why isn't the Kconfig called CONFIG_MQ_IOSCHED_BFQ > according to CONFIG_MQ_IOSCHED_DEADLINE? > > As we are talking about "*Storage* I/O schedulers" which of the MQ > Kconfig make sense when using MQ_DEADLINE and (MQ_)BFQ? > > # egrep -i 'bfq|deadline|_mq|mq_|_mq_' /boot/config-4.11.0-1-bfq-amd64 > CONFIG_POSIX_MQUEUE=y > CONFIG_POSIX_MQUEUE_SYSCTL=y > CONFIG_BLK_WBT_MQ=y > CONFIG_BLK_MQ_PCI=y > CONFIG_BLK_MQ_VIRTIO=y > CONFIG_IOSCHED_DEADLINE=y > CONFIG_IOSCHED_BFQ=y > CONFIG_BFQ_GROUP_IOSCHED=y > # CONFIG_DEFAULT_DEADLINE is not set > CONFIG_DEFAULT_BFQ=y > CONFIG_DEFAULT_IOSCHED="bfq" > CONFIG_MQ_IOSCHED_DEADLINE=y > # CONFIG_NET_SCH_MQPRIO is not set > CONFIG_SCSI_MQ_DEFAULT=y > # CONFIG_DM_MQ_DEFAULT is not set > The config for BFQ seems correct. For the others, it depends on what scheduler you want. If useful for you, the other two MQ- schedulers are mq-deadline and cyber. Thanks, Paolo > Thanks. > > - sed@ -
