The accompanying problem is also the abonormally high CPU load. The problem is instant polling of non-existent (not responding) radio. Your radio setup is probably incorrect, possible a mess in the cqrlog.cfg. Try to downoad a default cqrlog.cfg from here and copy it into your /cqrlog/log_data folder. Backup before your old cqrlog.cfg if you want. The default cqrlog.cfg redirects all polling to the hamlib dummy radio (model=1] and the high CPU load should return to its normal values.

Then you should set up your radio again. Don't use a too low poll rate, a value of 300 is sufficient.