Revisiting The Linux 6.19 Performance With "NEXT_BUDDY" Now Disabled

Written by Michael Larabel in Software on 26 January 2026 at 10:24 AM EST. Page 2 of 5. 2 Comments.

👁 Ethr benchmark with settings of Server Address: localhost, Protocol: TCP, Test: Latency, Threads: 64. v6.18 was the fastest.

👁 Ethr benchmark with settings of Server Address: localhost, Protocol: TCP, Test: Latency, Threads: 128. v6.18 was the fastest.

With the Microsoft Ethr network benchmarks of the localhost, the disabling of NEXT_BUDDY did recover some latency losses observed on Linux 6.19 Git up to this point. With the no NEXT_BUDDY state as of Linux 6.19-rc7+, the latency is now roughly comparable to where it was at on v6.18.

👁 Ethr benchmark with settings of Server Address: localhost, Protocol: TCP, Test: Bandwidth, Threads: 32. v6.18 was the fastest.

👁 Ethr benchmark with settings of Server Address: localhost, Protocol: TCP, Test: Bandwidth, Threads: 64. v6.18 was the fastest.

While the Ethr latency benchmarks showed improvements with disabling NEXT_BUDDY, for some local host TCP bandwidth/throughput benchmarks the Linux 6.19 Git state remained lower than Linux 6.18 stable.

👁 Ethr benchmark with settings of Server Address: localhost, Protocol: UDP, Test: Bandwidth, Threads: 32. Linux 6.19 Git 23 Jan was the fastest.

👁 Ethr benchmark with settings of Server Address: localhost, Protocol: UDP, Test: Bandwidth, Threads: 64. No NEXT_BUDDY was the fastest.

UDP bandwhdth

But for UDP bandwidth throughput performance tests, Linux 6.19 remains much better off than Linux 6.18...

👁 DaCapo Benchmark benchmark with settings of Java Test: Tradesoap. v6.18 was the fastest.

The Java DayTrader benchmark was one of the cases cited in the patch for disabling NEXT_BUDY due to regressions. With DaCapo's Tradesoap benchmark on OpenJDK Java 21, the performance does improve with NEXT_BUDDY now disabled.

2 Comments - Next Page

Page: 1 2 3 4 5 Next Page

URL: https://www.phoronix.com/review/linux-619-next-buddy/2

⇱ Revisiting The Linux 6.19 Performance With "NEXT_BUDDY" Now Disabled Review - Phoronix

Revisiting The Linux 6.19 Performance With "NEXT_BUDDY" Now Disabled