Axboe Achieves 8M IOPS Per-Core With Newest Linux Optimization Patches

Written by Michael Larabel in Linux Storage on 17 October 2021 at 12:00 AM EDT. 57 Comments
It was just last week that Linux optimizations were leading to possible 6M IOPS per core and then at the start of this week new patches pushed Linux past 7M IOPS per-core with an ideal hardware configuration as well. In ending out the week, 8M IOPS has been reached!

Jens Axboe of Facebook who leads the Linux kernel's block subsystem and also well known for his development of IO_uring has been pushing the limits of Linux I/O performance. It was just last month he was excited over 3+ million IOPS per-core after upgrading to an AMD Ryzen 9 5950X desktop with Intel Optane Gen2 storage.

Since his system upgrade, he's been relentlessly pursuing new optimizations throughout the block subsystem and IO_uring and is now reaching near the hardware limits. With the latest patches this weekend he did manage to successfully breach 8M IOPS per-core.

Great work and these Linux I/O improvements continue to be queued via the perf-wip branch. Much if not all of these improvements will end up being found in the Linux 5.16 cycle with its merge window kicking off next month.

Cheers to Jens Axboe and his incredible ongoing optimization work for enhancing Linux I/O performance.
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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

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