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Altera_Forum
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16 years ago

Ethernet performance using TSE in uClinux

Hi all, I am measuring ethernet performance on a NIOS II based board with an Altera TSE IP Core running uClinux, and it's been disappointing so far. I've done timing using TCP and UDP, and bar...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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  • Scatter-gather (NETIF_F_SG) support in the driver. Checksum offload was necessary for this, Linux won't support one without the other. Unaligned transfer support on the SGDMA was also necessary.

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Looks like the unaligned transfer feature in the SGDMA still doesn't actually work correctly, so I am getting some truncated packets with SG, particularly with telnet which produces lots of small unaligned data.