Il giorno 03 mag 2017, alle ore 10:00, Sedat Dilek =

[off-list ref] ha scritto:

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On Tue, May 2, 2017 at 2:16 PM, Markus Trippelsdorf
[off-list ref] wrote:

quoted

On 2017.05.02 at 14:07 +0200, Sedat Dilek wrote:

quoted

On Tue, May 2, 2017 at 10:00 AM, Markus Trippelsdorf
[off-list ref] wrote:

quoted

On 2017.05.02 at 09:54 +0200, Sedat Dilek wrote:

quoted

Hi,
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I want to play with BFQ.
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My base is block-next as of 28-Apr-2017.

[...]

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quoted

Not sure if the attached patches make sense (right now).

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No, it doesn't make sense at all.

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Hmm, I looked at 4.11.0-v8r11 and 0001 has exactly what my 2 patches =

do :-).

quoted

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BFQ started as a conventional scheduler. But because mq is the way of
the future it was ported before it was accepted into mainline.
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I am still playing and want to do my own experiences with BFQ.
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Not sure if FIO is a good testcase-tool here.
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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?
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As we are talking about "*Storage* I/O schedulers" which of the MQ
Kconfig make sense when using MQ_DEADLINE and (MQ_)BFQ?
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# egrep -i 'bfq|deadline|_mq|mq_|_mq_' /boot/config-4.11.0-1-bfq-amd64
CONFIG_POSIX_MQUEUE=3Dy
CONFIG_POSIX_MQUEUE_SYSCTL=3Dy
CONFIG_BLK_WBT_MQ=3Dy
CONFIG_BLK_MQ_PCI=3Dy
CONFIG_BLK_MQ_VIRTIO=3Dy
CONFIG_IOSCHED_DEADLINE=3Dy
CONFIG_IOSCHED_BFQ=3Dy
CONFIG_BFQ_GROUP_IOSCHED=3Dy
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_BFQ=3Dy
CONFIG_DEFAULT_IOSCHED=3D"bfq"
CONFIG_MQ_IOSCHED_DEADLINE=3Dy
# CONFIG_NET_SCH_MQPRIO is not set
CONFIG_SCSI_MQ_DEFAULT=3Dy
# CONFIG_DM_MQ_DEFAULT is not set
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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.
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- sed@ -