White Papers

Version Description
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
9.0.0.0 Introduced on the Z9000.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.3.11.1 Introduced on the Z9000.
8.1.1.0 Introduced on the E-Series.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series and E-Series.
Usage
Information
Field Description
Source QID /Tx
Process
Source Service Identifier
Destination
QID/Rx Process
Destination Service Identifier
Cur Len Current number of messages enqueued
High Mark Highest number of packets in the queue at any time
#of to / Timeout Timeout count
#of Retr /Retries Number of retransmissions
#msg Sent/Msg
Sent/
Number of messages sent
#msg Ackd/Ack
Rcvd
Number of messages acknowledged
Retr /Available
Retra
Number of retries left
Total/ Max Retra Number of retries allowed
Important Points:
● The SWP provides flow control-based reliable communication between the sending and receiving
software tasks.
● A sending task enqueues messages into the SWP queue3 for a receiving task and waits for an
acknowledgement.
● If no response is received within a defined period of time, the SWP timeout mechanism resubmits the
message at the head of the FIFO queue.
● After retrying a defined number of times, the SWP-2-NOMORETIMEOUT timeout message is
generated.
● In the S-Series example, a retry (Retries) value of zero indicates that the SWP mechanism reached
the maximum number of retransmissions without an acknowledgement.
Example
DellEMC# show processes ipc flow-control cp
Q Statistics on CP Processor
TxProcess RxProcess Cur High Time Retr Msg Ack Aval Max
Len Mark Out ies Sent Rcvd Retra Retra
DHCP0 ACL0 0 1 1 1 1 1 25 25
Control and Monitoring 141