Lines Matching defs:delta
294 * Calculates the count (the 'delta') since the last time the PMC was read.
299 * calculates the delta on the basis that there is no overflow when ovf is
305 * The check for delta negative hopefully always rectifies this situation.
311 long delta;
321 delta = (new_raw_count - (prev_raw_count & alpha_pmu->pmc_count_mask[idx])) + ovf;
326 if (unlikely(delta < 0)) {
327 delta += alpha_pmu->pmc_max_period[idx] + 1;
330 local64_add(delta, &event->count);
331 local64_sub(delta, &hwc->period_left);
445 * routine should detect this situation by noting a negative delta,