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When this socket option is enabled, relatively large contiguous buffers are allocated and used to receive data from the remote connection. When data is received a wrapper M_EXT mbuf is queued to the socket's receive buffer. This reduces the length of the linked list of received mbufs and allows consumers to consume receive data in larger chunks. To minimize reprogramming the page pods in the adapter, receive buffers for a given connection are recycled. When a buffer has been fully consumed by the receiver and freed, the buffer is placed on a per-connection free buffers list. The size of the receive buffers defaults to 256k and can be set via the hw.cxgbe.toe.ddp_rcvbuf_len sysctl. The hw.cxgbe.toe.ddp_rcvbuf_cache sysctl (defaults to 4) determines the maximum number of free buffers cached per connection. Note that this limit does not apply to "in-flight" receive buffers that are associated with mbufs in the socket's receive buffer. Co-authored-by: Navdeep Parhar <np@FreeBSD.org> Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D44001 (cherry picked from commit eba13bbc37ab4f45a8a3502d59c37d56d9a04ca5) |
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| .. | ||
| common | ||
| crypto | ||
| cudbg | ||
| cxgbei | ||
| firmware | ||
| iw_cxgbe | ||
| tom | ||
| adapter.h | ||
| if_cc.c | ||
| if_ccv.c | ||
| if_cxl.c | ||
| if_cxlv.c | ||
| offload.h | ||
| osdep.h | ||
| t4_clip.c | ||
| t4_clip.h | ||
| t4_filter.c | ||
| t4_if.m | ||
| t4_ioctl.h | ||
| t4_iov.c | ||
| t4_l2t.c | ||
| t4_l2t.h | ||
| t4_main.c | ||
| t4_mp_ring.c | ||
| t4_mp_ring.h | ||
| t4_netmap.c | ||
| t4_sched.c | ||
| t4_sge.c | ||
| t4_smt.c | ||
| t4_smt.h | ||
| t4_tracer.c | ||
| t4_vf.c | ||