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by drewg123
1792 days ago
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This 8 descriptor per packet limit is HORRIFIC. I debugged and fixed this issue on FreeBSD when we first moved to the new iflib based ixl (i40e's name on FreeBSD). They had a routine (ixl_tso_detect_sparse()) which was AFU. I wrote a userspace unit test that proved it was AFU, and then fixed it. I fed them back the routine & the unit test, and they hilariously left my commented debug prints in the routine. https://github.com/freebsd/freebsd-src/blob/412b5e40a721430a... And their 100GbE NIC has the same limit, which is just so sad. All these fancy features, and they cannot handle 8 segments per emitted packet on the wire. |
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