September 2003
Intermediate to advanced
1120 pages
23h 44m
English
Content preview from PCI Express System ArchitectureBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The Next Chapter
The next chapter discusses Traffic Classes, Virtual Channels, and Arbitration that support Quality of Service concepts in PCI Express implementations. The concept of Quality of Service in the context of PCI Express is an attempt to predict the bandwidth and latency associated with the flow of different transaction streams traversing the PCI Express fabric. The use of QoS is based on application-specific software assigning Traffic Class (TC) values to transactions, which define the priority of each transaction as it travels between the Requester and Completer devices. Each TC is mapped to a Virtual Channel (VC) that is used to manage transaction priority via two arbitration schemes called port and VC arbitration.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.