Lines Matching defs:variance
174 uint64_t sum, variance;
210 /* Then try to determine variance */
211 variance = 0;
216 variance += diff * diff;
220 variance >>= INTERVAL_SHIFT;
222 do_div(variance, divisor);
226 * small (stddev <= 20 us, variance <= 400 us^2) or standard
228 * 6*stddev, avg^2 > 36*variance). The average is smaller than
236 if (likely(variance <= U64_MAX/36)) {
237 if ((((u64)avg*avg > variance*36) && (divisor * 4 >= INTERVALS * 3))
238 || variance <= 400) {