why TCP_STREAM test throughput can't reach the media speed for acenic gigabit ethernet card with normal

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Compared to jumbo frame MTU=9000 bytes, Acenic Gigabit Ethernet Card can
almost reach the media speed for TCP_STREAM throughput test; same test
result for nomal MTU=1500 bytes is about 650Mbits/s. The PACKET_STREAM test
result for MTU=1500bytes is pretty good too, it is around 900Mbits/s.
Theorically TCP_STREAM throughput test for MTU=1500 bytes should be above
900Mbits/s. Does anyone has any idea why not?

Thanks
Shirley Ma
IBM Linux Technology Center

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• Next message: Shirley Ma: "Re: why TCP_STREAM test throughput can't reach the media speed for acenic gigabit ethernet card with normal"
• Previous message: Andi Kleen: "Re: 1:1 NAT on Linux 2.2 or 2.4"
• Next in thread: Shirley Ma: "Re: why TCP_STREAM test throughput can't reach the media speed for acenic gigabit ethernet card with normal"
• Maybe reply: Shirley Ma: "Re: why TCP_STREAM test throughput can't reach the media speed for acenic gigabit ethernet card with normal"
• Reply: Luc de Louw: "100mbps or not?"
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