Messages in this thread | | | Subject | Re: [PATCH V5 00/14] blk-mq-sched: improve sequential I/O performance(part 1) | From | Paolo Valente <> | Date | Tue, 10 Oct 2017 14:37:46 +0200 |
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> Il giorno 10 ott 2017, alle ore 14:34, Johannes Thumshirn <jthumshirn@suse.de> ha scritto: > > Hi John, > > On Tue, Oct 10, 2017 at 01:24:52PM +0100, John Garry wrote: >> It's using cfq (for non-mq) and mq-deadline (obviously for mq). > > Please be aware that cfq and mq-deadline are _not_ comparable, for a realistic > comparasion please use deadline and mq-deadline or cfq and bfq. >
Please set low_latency=0 for bfq if yours is just a maximum-throughput test.
Thanks, Paolo
>> root@(none)$ pwd >> /sys/devices/platform/HISI0162:01/host0/port-0:0/expander-0:0/port-0:0:7/end_device-0:0:7 >> root@(none)$ more ./target0:0:3/0:0:3:0/block/sdd/queue/scheduler >> noop [cfq] > > Maybe missing CONFIG_IOSCHED_DEADLINE? > > Thanks, > Johannes > > -- > Johannes Thumshirn Storage > jthumshirn@suse.de +49 911 74053 689 > SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg > GF: Felix Imendörffer, Jane Smithard, Graham Norton > HRB 21284 (AG Nürnberg) > Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
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