Added support for reporting packet (mis)order.

The "Latency" screen has been updated with 3 columns:
- mis-ordered
  Count the number of mis-ordered packets.
- extent:
  Gives an indication of how mis-ordered the packets are.
  Receiving packet "x - 5" after receiving packet "x" will
  cause an extent of 5.
- duplicate:
  Count number of duplicate packets.

Following commands have been added for the impair mode:
- proba no drop: replaces the former "probability" command.
  Percentage of forwarded packets. So 99.5 means 0.5% of packet drop.
- proba delay
  Percentage of delayed packets for the impair mode.
- proba duplicate
  Percentage of duplicate packets.

Similar parameters are supported within the config files:
- proba no drop
- proba delay
- proba duplicate

Note: it is recommanded to use the signature when measuring packet
misorder, as otherwise unexpected packet would cause miscounts.

Change-Id: I037f606f264d6e2bd7f123df5ed57ab7df8386d7
Signed-off-by: Xavier Simonart <xavier.simonart@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/VNFs/DPPD-PROX/eld.h b/VNFs/DPPD-PROX/eld.h
index b5de59d7..2731beb8 100644
--- a/VNFs/DPPD-PROX/eld.h
+++ b/VNFs/DPPD-PROX/eld.h
@@ -76,7 +76,10 @@ static uint32_t early_loss_detect_add(struct early_loss_detect *eld, uint32_t pa
 	old_queue_id = eld->entries[queue_pos];
 	eld->entries[queue_pos] = packet_index >> PACKET_QUEUE_BITS;
 
-	return (eld->entries[queue_pos] - old_queue_id - 1) & QUEUE_ID_MASK;
+	if (eld->entries[queue_pos] != old_queue_id)
+		return (eld->entries[queue_pos] - old_queue_id - 1) & QUEUE_ID_MASK;
+	else
+		return 0;
 }
 
 #endif /* _ELD_H_ */