Compiler and hardware interactions to reuse register fields in the data plane of a network forwarding element

A method of configuring a forwarding element that includes several message processing stages. The method identifies a first processing stage that starts processing a first header field of a message and a second processing stage that is the last message processing stage that processes the first heade...

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Bibliographische Detailangaben
Hauptverfasser:	Ferrara, Michael Gregory, Peterson, Jay Evan Scott, Attig, Michael E, Bosshart, Patrick
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY PHYSICS TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	A method of configuring a forwarding element that includes several message processing stages. The method identifies a first processing stage that starts processing a first header field of a message and a second processing stage that is the last message processing stage that processes the first header field. The method configures a field of a packet header container to store the first header field from the beginning of the first message processing stage. The method identifies a second header field used in a third processing stage after the second processing stage. The method configures a set of circuitries in the data plane to initialize the container field after the end of the second processing stage. The method configures the field of the container to store the second header field of the message after the end of the second processing stage and before the start of the third processing stage.