Cpuspeed Service Issue on Linux

Cpuspeed, an external Linux service on recent Intel processors, is not correctly tuned to allow StorNext to take advantage of processor speed. SUSE systems may also be impacted, as may AMD processors with similar capabilities.

On processors with a variable clockspeed (turboboost), the cpuspeed service on Red Hat controls the actual running speed of the processors based on system load.

A workload such as a heavily used FSM and probably Storage Manager does not register as something which needs a faster CPU. Disabling the cpuspeed service has been shown to double metadata performance on affected hardware.

Looking at the reported CPU clock speed by doing cat /proc/cpuinfo while the system is under load displays if a system is impacted by this issue.