diff options
Diffstat (limited to 'VNFs/DPPD-PROX/handle_lat.c')
| -rw-r--r-- | VNFs/DPPD-PROX/handle_lat.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/VNFs/DPPD-PROX/handle_lat.c b/VNFs/DPPD-PROX/handle_lat.c index 93652d47..b4e016ec 100644 --- a/VNFs/DPPD-PROX/handle_lat.c +++ b/VNFs/DPPD-PROX/handle_lat.c @@ -437,7 +437,7 @@ static uint32_t task_lat_early_loss_detect(struct task_lat *task, uint32_t packe static uint64_t tsc_extrapolate_backward(struct task_lat *task, uint64_t tsc_from, uint64_t bytes, uint64_t tsc_minimum) { -#ifdef NO_EXTRAPOLATION +#ifdef NO_LAT_EXTRAPOLATION uint64_t tsc = tsc_from; #else uint64_t tsc = tsc_from - task->bytes_to_tsc[bytes]; @@ -806,11 +806,14 @@ static void init_task_lat(struct task_base *tbase, struct task_args *targ) PROX_PANIC(task->bytes_to_tsc == NULL, "Failed to allocate %u bytes (in huge pages) for bytes_to_tsc\n", max_frame_size); + // There are cases where hz estimate might be slighly over-estimated + // This results in too much extrapolation + // Only account for 99% of extrapolation to handle cases with up to 1% error clocks for (unsigned int i = 0; i < max_frame_size * MAX_PKT_BURST ; i++) { if (bytes_per_hz == UINT64_MAX) task->bytes_to_tsc[i] = 0; else - task->bytes_to_tsc[i] = (rte_get_tsc_hz() * i) / bytes_per_hz; + task->bytes_to_tsc[i] = (rte_get_tsc_hz() * i * 0.99) / bytes_per_hz; } } |