Technical Tip: Useful diagnostics commands for troubleshooting NTurbo related issues

[cskuan]

Description

This article provides useful diagnostics commands for troubleshooting NTurbo-related issues.

Scope

FortiGate.

Solution

Debug command:

fnsysctl cat /proc/nturbo/<n>/drv                                  <------  '<n>' is the NTurbo ID.

# fnsysctl cat /proc/nturbo/0/drv
Turbo interface ID: 0
=======================================================================
Driver RX/TX:      0/0
TX hang:        No
Free/Used buffers:   48128/8192
Alloc fail:     0, Bad qid:     0
queue ready: 0x0000001f, 0x00000000

RXQ_0(0,374): IN 0 OUT 0 DROP 0 NRDY 0 Fullness 0, Peak 0
TXQ_0(0,374): IN 0 OUT 0 DROP 0 USR_DROP 0 BUFERR 0
 
RXQ_1(2,375): IN 0 OUT 0 DROP 0 NRDY 0 Fullness 0, Peak 0
TXQ_1(2,375): IN 0 OUT 0 DROP 0 USR_DROP 0 BUFERR 0
 
RXQ_2(4,373): IN 0 OUT 0 DROP 0 NRDY 0 Fullness 0, Peak 0
TXQ_2(4,373): IN 0 OUT 0 DROP 0 USR_DROP 0 BUFERR 0

……………

• 'Driver RX': number of packets received from NP6.
•  'Driver TX': number of packets transmitted by NTurbo.
  
• 'RXQ_0(0,374)': (NTurbo queue, ipsengine PID).

'RXQ':

• 'IN': packets delivered to IPs engine.
  
•  'OUT': packets received by IPs engine.
  
•  'DROP': packets lost during delivery.
  
•  'NRDY': packets dropped due to IPs engine failure.

'TXQ':

•  'IN': packets sent by IPs engine.
  
•  'OUT': packets transmitted by NTurbo.
  
•  'DROP': packet dropped by NTurbo due to slow TX speed.
  
•  'USR_DROP': packets dropped from IPs engine due to matching.
  
• 'BUFERR': packets dropped due to buffer error.
  
  

Related articles:
Technical Note: How to troubleshoot NTurbo on a FortiGate  
NTurbo offloads flow-based processing