Internal shared memory (ISM) interface statistics record (subtype 45)
The ISM Interface statistics record is collected at user specified intervals. The record provides data for ISM interfaces only, one interface specific section for one ISM interface. Any interface in the process of being deleted from the stack at the time of interval reporting is ignored.
Each interface specific section reports statistical data about the ISM interface for the previous recording interval. For those fields that provide an interval value, to determine a cumulative value for the given statistic, add the values reported for the statistic in the individual interface statistics interval records. Other fields provide the current or highest value of a statistic and are not interval values. If interface statistics recording is turned off dynamically, or the TCP stack terminates, a final ISM interface statistics record is generated to report close-out data.
See Table 1 for the contents of the TCP/IP stack identification section. For the ISM interface statistics record, the TCP/IP stack identification section indicates SMCD as the subcomponent and one of the six possible interval record reason settings, depending on whether the reporting is due to interval expiration, statistics collection termination, or collection shutdown.
| Offset | Name | Length | Format | Description |
|---|---|---|---|---|
| 0(X'0) | Standard SMF Header | 24 | Standard SMF header; subtype is 45(X'2D') | |
| Self-defining section | ||||
| 24(X'18') | SMF119SD_TRN | 2 | Binary | Number of triplets in this record (2) |
| 26(X'1A') | 2 | Binary | Reserved | |
| 28(X'1C') | SMF119IDOff | 4 | Binary | Offset to TCP/IP identification section |
| 32(X'20') | SMF119IDLen | 2 | Binary | Length of TCP/IP identification section |
| 34(X'22') | SMF119IDNum | 2 | Binary | Number of TCP/IP identification sections |
| 36(X'24') | SMF119S1Off | 4 | Binary | Offset to first ISM interface section |
| 40(X'28') | SMF119S1Len | 2 | Binary | Length of each ISM interface section |
| 42(X'2A') | SMF119S1Num | 2 | Binary | Number of ISM interface sections |
Table 2 shows the ISM interface statistics specific section.
| Offset | Name | Length | Format | Description |
|---|---|---|---|---|
| 0(X'0) | SMF119DM_ISDuration | 8 | Binary | Duration of stack recording interval in microseconds, where bit 51 is equivalent to one microsecond. |
| 8(X'8') | SMF119DM_ISName | 16 | EBCDIC | Interface name |
| 24(X'18') | SMF119DM_ISPNetID | 16 | EBCDIC | Physical network ID |
| 40(X'28') | SMF119DM_ISBytesIn | 8 | Binary | Bytes received across this ISM interface |
| 48(X'30') | SMF119DM_ISInOperations | 8 | Binary | Inbound operations across this ISM interface |
| 56(X'38') | SMF119DM_ISBytesOut | 8 | Binary | Bytes sent across this ISM interface |
| 64(X'40') | SMF119DM_ISOutOperations | 8 | Binary | Outbound operations across this ISM interface |
| 72(X'48') | SMF119DM_ISSMCLinks | 4 | Binary | Total number of SMC-D links established across this ISM interface |
| 76(X'4C') | SMF119DM_ISTCPConns | 4 | Binary | Total number of TCP connections established across this ISM interface |
| 80(X'50') | SMF119DM_ISRcvBufInuse | 4 | Binary | Current amount of fixed 64-bit storage that is in use for inbound processing |
| 84(X'54') | SMF119DM_ISFlags | 1 | Binary | Flags
|