New AMD Zen 5 Perf Events Going Into Linux 6.13

[phoronix]

Phoronix: New AMD Zen 5 Perf Events Going Into Linux 6.13

Sent out last night for the ongoing Linux 6.13 merge window were all of the perf tool changes for the wonderful "perf" subsystem for performance profiling and the like. In addition to adding the HWMON PMU to "perf stat", leader sampling for inherited task events, and various other tooling improvements, there are also vendor event updates. Most notable with the updated CPU vendor events are new AMD Zen 5 processor events...

https://www.phoronix.com/news/AMD-Zen-5-Perf-Events-Linux-613

[yump]

This is the patch series for the new Zen 5 events. It appears to be some stuff for measuring DRAM, I/O, and cross-socket bandwidth, plus some events for tracking where data came from (local CCX/remote CCX/DRAM) for each thing that can cause a cache line fill (demand read/hardware prefetch/software prefetch).

I don't have any Zen CPU's, so I can't speak to how much of an improvement this is over what was available before.