Linux 4.20 I/O Scheduler Benchmarks On NVMe SSD Storage

Written by Michael Larabel in Storage on 4 December 2018. Page 3 of 3. 19 Comments

Kyber and MQ-Deadline were duking it out in BlogBench for the best performance on Linux 4.20.

While for the BlogBench write test, BFQ was coming out ahead.

BFQ also picked up wins on the Samsung 970 EVO SSD when running the PostgreSQL database server.

From all 26 benchmarks run, BFQ in the low_latency mode picked up 10 first place finishes followed by no I/O scheduler with eight wins and then MQ-Deadline with five wins. Doing the worst overall was the Facebook-developed Kyber I/O scheduler with seeing just one win but coming in last place the most (seven times).

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Michael Larabel

Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via