Linux 5.7 Perf Changes Include Additions For AMD Zen 3, Intel Tiger Lake

[phoronix]

Phoronix: Linux 5.7 Perf Changes Include Additions For AMD Zen 3, Intel Tiger Lake

The perf subsystem continues to be quite lively with improvements and for Linux 5.7 is seeing a number of low-level improvements...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-5.7-Perf-Changes

[gregzeng]

"The Linux Foundation" regularly releases the source code to these developments, before the "Final Release". Each release of the source code is almost immediately compiled into ready-to-run binary code. These releases are every few days.
if you want this binary code, search for: "Index of /~kernel-ppa/mainline"
Kernels 5.6 and 5.5 both had seven "RELEASE CANDIDATES" before the final was ready.
Each RC had just some comments, not complete, on the changes to each RC. There seems to be no way to know exactly what "improvements" were to be kept in the final release. Bearing in mind the coding personality of the organization, they seem yet to have a PR personality that can relate to so many devoted coders.

The bench testers here might understand that each compilation of the raw Linux kernel has various specializations and compromises. Which range of CPU's and other hardware will or will not be favored? How much speed, or power saving, or vache & memory management be determined? The official Ubuntu web site also is aware of these specializations.

If excess CPU, etc power consumption is a priority, the x86 users (amd64 only) and armhf are treated differently. Most Linux users might be using Debian based systems on amd64 units. Choose the Low Latency version of these kernels.

Personally I tried the official Phoronix software here at home; too old & frail to ever leave my nursing home now. Could not understand the software. Which of the many tests? How do the results compare to others? Worst of all, Manjaro XFCE (latest version) seems to not have this software in any of its many repositories.

I did try other bench testing software. Not sure how these compare with Phoronix. Bonnie never did work. How to make these comparisons also with Android & Windows? Many big unsolved problems. One very common test needed: of the many offline plugin storage solutions (flash sticks, drives, etc) which is better, under which operating system, under which hardware & software ports? Hopefully some solution might appear?

[kcrudup]

There seems to be no way to know exactly what "improvements" were to be kept in the final release.

Well, they actually do document (quite well) each change/improvement that goes into every kernel, both final and -rc, and the folks who work that closely to the kernel know where to look (LKML, and the git commit logs, etc.) and things you can get to yourself, too- take a look at this, for example: https://kernelnewbies.org/LinuxChanges

The people who package your PPAs may not include that documentation, but it's there.