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https://www.redbooks.ibm.com/abstracts/sg248579.html https://www.redbooks.ibm.com/abstracts/sg248579.html: “The IBM z17 supports a PCIe I/O infrastructure. PCI
by Someone 2y ago
https://www.redbooks.ibm.com/abstracts/sg248579.html https://www.redbooks.ibm.com/abstracts/sg248579.html:
“The IBM z17 supports a PCIe I/O infrastructure. PCIe features are installed in PCIe+ I/O drawers. Up to 12 I/O drawers per IBM z17 can be ordered, which allows for up to 192 PCIe I/O and special purpose features.
For a four CPC drawer system, up to 48 PCIe+ fan-out slots can be populated with fan-out cards for data communications between the CPC drawers and the I/O infrastructure, and for coupling. The multiple channel subsystem (CSS) architecture allows up to six CSSs, each with 256 channels.
The IBM z17 implements PCIe Generation 5 (PCIe+ Gen5), which is used to connect the PCIe Generation 4 (PCIe+ Gen4) dual port fan-out features in the CPC drawers. The I/O infrastructure is designed to reduce processor usage and I/O latency, and provide increased throughput and availability.”