A complete description of the message group follows:

     IST1230I TIME = time  DATE = date ID = trlename
     IST1719I PCIREALO = pcirealo   PCIREAL  = pcireal
     IST1751I PCIUNPRO = pciunpro   PCIUNPRD = pciunprd
     IST2366I POLLEQO  = polleqo    POLLEQ   = polleq
     IST2367I POLLEQEO = polleqeo   POLLEQE  = polleqe
     IST924I -------------------------------------------
     IST2368I ULP_ID   = tcpname
     IST2369I POLLCQO  = pollcqo    POLLCQ   = pollcq
     IST2370I POLLCQUO = pollcquo   POLLCQU  = pollcqu
     IST2371I POLLCQEO = pollcqeo   POLLCQE  = pollcqe
     IST2372I SRBSCHDO = srbschdo   SRBSCHD  = srbschd
     IST2373I SRBRSCHO = srbrscho   SRBRSCHD = srbrschd
     IST2374I INBBYTLO = bytecntlo  INBBYTEL = bytecntl
     IST2375I INBBYTMO = bytecntmo  INBBYTEM = bytecntm
     IST2376I INBBYTNO = bytecntno  INBBYTEN = bytecntn
     IST2377I DATAREQO = datareqo   DATAREQ  = datareq
     IST2378I POSTO    = posto      POST     = post
     IST2379I POSTEO   = postelemo  POSTELEM = postelem
     IST2380I POSTQUEO = postqueo   POSTQUED = postqued
     IST2381I OUTBYTLO = bytecntlo  OUTBYTEL = bytecntl
     IST2382I OUTBYTMO = bytecntmo  OUTBYTEM = bytecntm
     IST2383I OUTBYTNO = bytecntno  OUTBYTEN = bytecntn

Many messages in this group contain both a count and an overflow. Both the count and overflow are maintained in unsigned 32-bit variables, unless otherwise indicated. Because an unsigned 32-bit variable can contain only a value up to and including 4294967295 ('FFFFFFFF'X), the variable will wrap through 0 if an increment results in exceeding this value. When such a wrap occurs, the overflow is incremented by 1. Therefore the total count is determined as follows:

Total = (overflow * 4294967296) + count

In the message text:

date and time

The date and time values specify when the record was reported. See DATE and TIME formats for information about the date and time values.

trlename

The name of the internally generated TRLE name that represents the 10GbE RoCE Express port for which tuning statistics are being recorded. See Resources automatically activated by VTAM in z/OS Communications Server: SNA Network Implementation Guide for information about the TRLE name.

In the message text:

pcirealo

The real program controlled interrupt (PCI) overflow.

pcireal

The real PCI count. This value represents the accumulated number of real PCI interrupts that are fielded by the device interrupt exit for the 10GbE RoCE Express port.

A real PCI interrupt is a dispatch of the device interrupt exit as a result of a call from the system interrupt handler.

In the message text:

pciunpro

The unproductive RDMA over converged Ethernet (RoCE) polls of the 10GbE RoCE Express event queue (Poll_EQ) overflow.

pciunprd

The unproductive RoCE Poll_EQ count. This value represents the accumulated number of unproductive RoCE Poll_EQ requests for this 10GbE RoCE Express port.

An unproductive RoCE Poll_EQ request is a request for which the 10GbE RoCE Express port did not provide any event notifications. An event notification indicates that data was received on this 10GbE RoCE Express port and can be processed. An unproductive RoCE Poll_EQ indicates unnecessary processing by the system interrupt handler.

In the message text:

polleqo

The RoCE Poll_EQ overflow.

polleq

The RoCE Poll_EQ count. This value represents the accumulated number of productive RoCE Poll_EQ requests for this 10GbE RoCE Express port.

A productive RoCE Poll_EQ request is a request for which at least one event notification was returned. A higher ratio of productive RoCE Poll_EQ requests to real PCIs indicates that VTAM is minimizing unnecessary processing by the system interrupt handler required to service the 10GbE RoCE Express port, resulting in more efficient CPU utilization.

In the message text:

polleqo

The RoCE Poll_EQ overflow.

polleqe

The RoCE Poll_EQ event notification count. This value represents the accumulated number of event notifications that are returned on all productive RoCE Poll_EQ requests for this 10GbE RoCE Express port.

A higher ratio of RoCE Poll_EQ entries to real PCIs indicates that more data is being processed per real interrupt, which results in more efficient CPU utilization.

In the message text:

tcpname

The name of a TCP/IP stack that activated the 10GbE RoCE Express port for which tuning statistics are being reported.

In the message text:

pollcqo

The RoCE Poll of the 10GbE RoCE Express completion queue (Poll_CQ) overflow.

pollcq

The RoCE Poll_CQ count. This value represents the accumulated number of productive RoCE Poll_CQ requests by tcpname for this 10GbE RoCE Express port.

A productive RoCE Poll_CQ request is a request for which at least one completion event was returned. A completion event represents the receipt of TCP connection notification data or Shared Memory Communication (SMC) link control data.

In the message text:

pollcquo

The unproductive RoCE Poll_CQ overflow.

pollcqu

The unproductive RoCE Poll_CQ count. This value represents the accumulated number of unproductive RoCE Poll_CQ requests by tcpname for this 10GbE RoCE Express port.

An unproductive RoCE Poll_CQ request is a request for which no completion events were returned. An unproductive RoCE Poll_CQ indicates that tcpname was dispatched to process data when no data was available to be processed.

In the message text:

pollcqeo

The RoCE Poll_CQ operations overflow.

pollcqe

The RoCE Poll_CQ operations count. This value represents the accumulated number of completion events returned for all productive RoCE Poll_CQ requests initiated by tcpname for this 10GbE RoCE Express port.

A higher ratio of RoCE Poll_CQ operations to service request block (SRB) dispatches indicates that more data is being processed per dispatch of tcpname, which results in more efficient CPU utilization.

In the message text:

srbschdo

The interrupt handler SRB dispatch overflow.

srbschd

The interrupt handler SRB dispatch count. This value represents the accumulated number of times an SRB was scheduled by the interrupt handler for tcpname to process inbound data for this 10GbE RoCE Express port.

In the message text:

srbrscho

The additional SRB dispatch overflow.

srbrschd

The additional SRB dispatch count. This value represents the accumulated number of times that an additional SRB was scheduled from within an existing SRB on tcpname. The additional SRB was scheduled because more inbound data is available to be processed for this 10GbE RoCE Express port than the existing SRB could efficiently manage.

A high additional SRB dispatch value indicates that multiple processors are required to process all inbound data from this 10GbE RoCE Express port for tcpname.

In the message text:

bytecntlo

The inbound RoCE inline data bytes overflow.

bytecntl

The inbound RoCE inline data bytes count. This value represents the accumulated number of bytes of SMC link control data that was received by tcpname for this 10GbE RoCE Express port.

In the message text:

bytecntmo

The inbound RoCE immediate data bytes overflow.

bytecntm

The inbound RoCE immediate data bytes count. This value represents the accumulated number of bytes of TCP connection notification data that was received by tcpname for this 10GbE RoCE Express port.

In the message text:

bytecntno

The inbound RDMA bytes overflow.

bytecntn

The inbound RDMA bytes count. This value represents the accumulated number of bytes of TCP connection data that was received by tcpname for this 10GbE RoCE Express port.

In the message text:

datareqo

The outbound data request overflow.

datareq

The outbound data request count. This value represents the accumulated number of data requests received by VTAM from tcpname over this 10GbE RoCE Express port. Data requests are used to send TCP connection data or TCP connection notification data.

In the message text:

posto

The RoCE Post request overflow.

post

The RoCE Post request count. This value represents the accumulated number of RoCE Post requests processed to transfer data sent by tcpname for this 10GbE RoCE Express port.

In the message text:

postelemo

The RoCE Post operation overflow.

postelem

The RoCE Post operation count. This value represents the accumulated number of RoCE Post operations that successfully transferred data provided by tcpname for this 10GbE RoCE Express port.

A RoCE Post operation represents a discreet transfer of TCP connection data, TCP connection notification data, or SMC link control data. A single RoCE Post request might require two or more RoCE Post operations to transfer the data provided by tcpname on an outbound data request. A higher ratio of RoCE Post operations to RoCE Post requests indicates more efficient utilization of CPU resources when transferring data.

In the message text:

postqueo

The queued RoCE Post request overflow.

postqued

The queued RoCE Post request count. This value represents the accumulated number of queued RoCE Post requests initiated by tcpname for this 10GbE RoCE Express port.

A queued RoCE Post request is a request that was not transmitted on the first attempt because of hardware resource constraints.

In the message text:

bytecntlo

The outbound RoCE inline data bytes overflow.

bytecntl

The outbound RoCE inline data bytes count. This value represents the accumulated number of bytes of SMC link control data that was sent by tcpname for this 10GbE RoCE Express port.

In the message text:

bytecntmo

The outbound RoCE immediate data bytes overflow.

bytecntm

The outbound RoCE immediate data bytes count. This value represents the accumulated number of bytes of TCP connection notification data that was sent by tcpname for this 10GbE RoCE Express port.

In the message text:

bytecntno

The outbound RDMA bytes overflow.

bytecntn

The outbound RDMA bytes count. This value represents the accumulated number of bytes of TCP connection data that was sent by tcpname for this 10GbE RoCE Express port.