Linux 3.17 To 4.15 Kernel Benchmarks On Intel Gulftown & Haswell
Written by Michael Larabel in Software on 26 January 2018. Page 2 of 3. 3 Comments

Most of the kernels behaved relatively the same between the two Intel x86_64 systems, albeit on different scales. This testing isn't meant to compare i7-990X vs. i7-5960X but two different data points for looking at how the Linux kernel performance has changed over the past 3+ years since Linux 3.17's release in October 2014.

In the PostMark I/O benchmark that's primarily limited by fsync performance, Linux 4.15 indeed takes a significant drop in performance due to Kernel Page Table Isolation (KPTI) and Retpolines.

The ebizzy test, which aims to resemble web server workload performance, takes a much more noticeable impact on the more powerful Haswell-E Core i7-5960X system. But still Linux 4.15 lets its performance still run much better than the 3.xx or early 4.x kernel releases.

Interestingly the boot time on Linux 4.15 for the i7 990X Gulftown system is at its best while the i7-5960X system is still booting much slower than on pre-4.5 kernels.



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