c['procstat_time'];

                var rate = function(k) {
                    v2 = 0;
                    k = 'procstat_' + k;
                    if (k in nodestats)
                        v2 = nodestats[k];
                    v1 = 0;
                    if (k in lastproc)
                        v1 = lastproc[k];
                    return (v2 - v1) / dt;
                    //return (nodestats['procstat_' + k] - lastproc['procstat_' + k])/ dt;
                };
                // http://www.linuxh