HST_FIXED_1
last += next * (HST_FIXED_1 - weight);
if (base >= HST_FIXED_1)
base_weight >= HST_FIXED_1)) {
pi->historical_service_time = HST_FIXED_1;
#define HST_MAX_INFLIGHT HST_FIXED_1
min(st * HST_FIXED_1, HST_FIXED_MAX),