Am Dienstag, 21. Juni 2022, 01:15:58 CEST schrieb Atish Patra: > The Sscofpmf ('Ss' for Privileged arch and Supervisor-level extensions, > and 'cofpmf' for Count OverFlow and Privilege Mode Filtering) > extension allows the perf to handle overflow interrupts and filtering > support. This patch provides a framework for programmable > counters to leverage the extension. As the extension doesn't have any > provision for the overflow bit for fixed counters, the fixed events > can also be monitoring using programmable counters. The underlying > counters for cycle and instruction counters are always running. Thus, > a separate timer device is programmed to handle the overflow. > > Signed-off-by: Atish Patra <atish.pa...@wdc.com> > Signed-off-by: Atish Patra <ati...@rivosinc.com>
it looks like patches 1-7 already landed in Qemu though I didn't see any "applied" messages, so it took me a bit to realize that :-) . In any case, I ran Atish's sample from the cover-letter with a matching kernel nad got similar results as shown in the cover-letter. Tested-by: Heiko Stuebner <he...@sntech.de>