default_column_width
column_width = default_column_width(cb, idx);
column_width = default_column_width(cb, idx);
unsigned int column_width = default_column_width(cb, IOS_QUEUES);
unsigned int column_width = default_column_width(cb, IOS_LATENCY);
unsigned int column_width = default_column_width(cb, IOS_DEFAULT);