c85cb1a0a2
- add a sysctl, dev.netmap.ix_crcstrip, to control whether ixgbe should strip the CRC on received frames. Defaults to 0, which keeps the CRC. and improves performance when receiving min-sized (64-byte) frames. This matters because min-sized frames is one of the standard benchmarks for switches and routers, some chipsets seem to issue read-modify-write cycles for PCIe transactions that are not a full cache line, and a min-sized frame triggers the bug, resulting in reduced throughput -- 9.7 instead of 14.88 Mpps -- and heavy bus load. - for the time being, always look for incoming packets on a select/poll even if there has not been an interrupt in the meantime. This is only a temporary workaround for a probable race condition in keeping track of rx interrupts. Add a couple of diagnostic vars to help studying the problem. |
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| .. | ||
| head.diff | ||
| if_em_netmap.h | ||
| if_igb_netmap.h | ||
| if_lem_netmap.h | ||
| if_re_netmap.h | ||
| ixgbe_netmap.h | ||
| netmap_kern.h | ||
| netmap.c | ||