linux/Documentation/block
Paolo Valente 43c1b3d6e5 block, bfq: stress that low_latency must be off to get max throughput
The introduction of the BFQ and Kyber I/O schedulers has triggered a
new wave of I/O benchmarks. Unfortunately, comments and discussions on
these benchmarks confirm that there is still little awareness that it
is very hard to achieve, at the same time, a low latency and a high
throughput. In particular, virtually all benchmarks measure
throughput, or throughput-related figures of merit, but, for BFQ, they
use the scheduler in its default configuration. This configuration is
geared, instead, toward a low latency. This is evidently a sign that
BFQ documentation is still too unclear on this important aspect. This
commit addresses this issue by stressing how BFQ configuration must be
(easily) changed if the only goal is maximum throughput.

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-05-10 07:39:43 -06:00
..
00-INDEX block, bfq: introduce the BFQ-v0 I/O scheduler as an extra scheduler 2017-04-19 08:29:02 -06:00
bfq-iosched.txt block, bfq: stress that low_latency must be off to get max throughput 2017-05-10 07:39:43 -06:00
biodoc.txt block: better op and flags encoding 2016-10-28 08:48:16 -06:00
biovecs.txt Documentation: update notes in biovecs about arbitrarily sized bios 2015-08-13 12:32:07 -06:00
capability.txt
cfq-iosched.txt block: replace REQ_NOIDLE with REQ_IDLE 2016-11-01 09:43:26 -06:00
cmdline-partition.txt block: change config option name for cmdline partition parsing 2013-09-30 14:31:02 -07:00
data-integrity.txt block: Remove integrity tagging functions 2014-09-27 09:14:50 -06:00
deadline-iosched.txt trivial: Miscellaneous documentation typo fixes 2009-06-12 18:01:47 +02:00
ioprio.txt Update Jens Axboe's email in Documentation/* 2007-10-16 09:59:55 +02:00
kyber-iosched.txt blk-mq: introduce Kyber multiqueue I/O scheduler 2017-04-14 14:06:58 -06:00
null_blk.txt null_blk: add usage hints for NVM 2016-11-16 08:26:11 -07:00
pr.txt Doc: Fix double words in Documentation 2017-01-26 15:25:41 -07:00
queue-sysfs.txt block: remove the discard_zeroes_data flag 2017-04-08 11:25:38 -06:00
request.txt Update Jens Axboe's email in Documentation/* 2007-10-16 09:59:55 +02:00
stat.txt
switching-sched.txt Documentation: drop as block elevator reference in switching-sched.txt 2011-11-04 12:01:48 -07:00
writeback_cache_control.txt block, drivers, fs: rename REQ_FLUSH to REQ_PREFLUSH 2016-06-07 13:41:38 -06:00