[ Please keep me in CC as I'm not subscribed to the list] Hi all, I have an application which finds the data rate over the PCIe interface. I’m getting the lesser data rate in one of my Linux X86 systems. When I change the scaling_governor from "powersave" to "performance" mode for each CPU, then there is slight improvement in the PCIe data rate. Parallely I started profiling the workload with perf. Whenever I start running the profile command “perf stat -a -d -p <PID>” surprisingly the application resulted in excellent data rate over PCIe, but when I kill the perf command again PCIe data rate drops. I am really confused about this behavior.Any clues from this behaviour? Also I noticed my system not having the 'cpuinfo_cur_freq' sys file. Is that okay? cat: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq: No such file or directory -- Thanks,