Appendix B.1. Driver Stats - FieldServer FS-8700-66 GE SNP Manual

Page 22 of 29FS-8700-66_GE-SNP Manual

Appendix B.1. Driver Stats

The statistics recorded by the GE-SNP Serial Driver are slightly different from the way that
FieldServer driver normally records statistics. This difference arises from the fact that this
driver is not a simple poll response driver. Bear in mind that a single poll can generate a
large number of response fragments.
Fragment Ack/nack messages are NOT counted as messages but the bytes sent/rcvd are
counted.
Connection messages are counted as messages and the bytes sent/rcvd are counted.
This driver can expose these and additional statistics by writing data to a Data Array.
A special Map Descriptor is required. The driver recognizes the Map Descriptor by its name
which must be "SNP-stats".
Example: Configuration of this special Map Descriptor
Nodes
Node_Name,
Null_Node,
Data_Arrays
Data_Array_Name,
SNP_STATS
Map_Descriptors
Map_Descriptor_Name, Data_Array_Name,
snp-stats
When the driver sees this Map Descriptor it uses the Data Array SNP_STATS (in this
example) to store driver specific statistics. Only one of these Map Descriptors may be
specified (per tier) per FieldServer.
The driver stores the following stats for each port.. The offset into the Data Array can be
found by multiplying the port number by 60
No Message
0 GE_STAT_CPU_ID
11 GE_STAT_T1_TIMER
12 GE_STAT_MBOX_NAK_MAJOR
13 GE_STAT_MBOX_NAK_MINOR
14 GE_STAT_MBOX_NAK_CNT
15 GE_STAT_MBOX_PROG_NUM
16 GE_STAT_MBOX_SWEEP
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Protocol
SNP
Data_Format,
, UINT32 ,
, SNP_STATS
Data_Array_Length
660
Node_Name,
, Null_Node ,
Description
This is 10 bytes long. The numbers placed
here correspond to the ASCII characters of
the responding Node's name.
The current value of the T1 timer is
reported here. The driver uses the larger of
its own and the slave T1 Timer.
Most recent Mailbox Nak error code. See
additional table below
Mailbox Nak error Count
Most recent Piggyback info
Page 22 of 29
Length
660