Robin HJ & R. Hughes-Jones Manchester Sep 1999 Gigabit Ethernet in Ptolemy Status Sep 99 : Stars that exist : –GigEChipTranslate between GigEPacket and.

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Presentation transcript:

Robin HJ & R. Hughes-Jones Manchester Sep 1999 Gigabit Ethernet in Ptolemy Status Sep 99 : Stars that exist : –GigEChipTranslate between GigEPacket and “int” –GigE4Sw4 port GigEPacket shared memory switch with Mac address learning –GigEIntFaceTranslate between Amessages and GigEPackets –AmsGen Translate between Amessages and “int” Objects that are used inside the Stars : –GigEPacketDefine various packet types data, pause... –GigEStatisticsProvide throughput and rate stats –GigELinkImplement 100Mbit & Gigabit Ethernet link –GigERouterPacket router

Robin HJ & R. Hughes-Jones Manchester Sep 1999 The Gigabit Ethernet Link Object Simple Test of the GigELink Object Poisson GigEChip intGigEPacketint Scope GigELink Object Internals : Used in the Stars : –GigEIntFace –GigE4Sw –GigEChip GigEPacket Local bus Data & Control GigELink Send Packet Queue Recv. Packet Queue GigELink GigEPacket Ethernet Link

Robin HJ & R. Hughes-Jones Manchester Sep 1999 Gigabit Ethernet Poisson generator All buses at 8 ns / byte Packet times: 1024 bytes 8.29  s 512 bytes 4.19  s Qs = packets to be sent Send bus 8 ns / byte Receive bus 13 ns / byte Ethernet recv. link with hi water mark of 5 packets see pause / data packets recv. Q of 5 Effect of packet size on Qs and Latency

Robin HJ & R. Hughes-Jones Manchester Sep 1999 Ethernet Switches Internals : Size: 4 ports Type: Multi Port memory Amsg Gig4Sw Amsg A E Gig4Sw A E Test of MAC addresses Learning : Routing Function Data & Control Data & Control GigEPacket GigELink Send Packet Queue Recv. Packet Queue GigEPacket GigELink Send Packet Queue Recv. Packet Queue GigELink GigERouter

Robin HJ & R. Hughes-Jones Manchester Sep 1999 The Amessage - Ethernet Interface Internals : Amessages stored on sending, deleted when recv. Timeout needed A E Packetiser Data & Control Data & Control AmessageGigEPacket Amessage GigELink Recv. Message Queue GigEPacket GigELink Send Packet Queue Recv. Packet Queue GigELink Amessage Builder Send Amessage Store