On 8/9/2023 1:09 PM, Konrad Dybcio wrote:
Add support for the Qualcomm LLCC (Last-Level Cache Controller) PMU, which provides a single event, expressing cache read misses. Based on the vendor driver found in the msm-5.10 downstream kernel. Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> --- Hi, I've been trying to get this driver going upstream by cleaning it up and adding the necessary perf boilerplate (the original Qualcomm one only pokes at the PMU from within the kernel itself) to use the userspace tool. I can not however get it to cooperate.. in this iteration I get a PMU event registered (though with only a "raw" name - no "x OR y" like with other PMUs on the system) as: llcc_pmu/read_miss/ [Kernel PMU event] but the .read callback is never called when I run: sudo perf stat -C 0 -a -e llcc_pmu/read_miss/ stress-ng -C 8 -c 8 -m 10 which always returns 0 if I add --always-kernel I get: <not supported> llcc_pmu/read_miss/
Which SOC you are trying this on? -- ---Trilok Soni
