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xsk: Add new statistics

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It can be useful for the user to know the reason behind a dropped packet.
Introduce new counters which track drops on the receive path caused by:
1. rx ring being full
2. fill ring being empty

Also, on the tx path introduce a counter which tracks the number of times
we attempt pull from the tx ring when it is empty.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200708072835.4427-2-ciara.loftus@intel.com
This commit is contained in:
Ciara Loftus
2020-07-08 07:28:33 +00:00
committed by Alexei Starovoitov
parent 24a38b7c0c
commit 8aa5a33578
6 changed files with 50 additions and 7 deletions
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5
tools/include/uapi/linux/if_xdp.h
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@@ -73,9 +73,12 @@ struct xdp_umem_reg {
};
struct xdp_statistics {
__u64 rx_dropped; /* Dropped for reasons other than invalid desc */
__u64 rx_dropped; /* Dropped for other reasons */
__u64 rx_invalid_descs; /* Dropped due to invalid descriptor */
__u64 tx_invalid_descs; /* Dropped due to invalid descriptor */
__u64 rx_ring_full; /* Dropped due to rx ring being full */
__u64 rx_fill_ring_empty_descs; /* Failed to retrieve item from fill ring */
__u64 tx_ring_empty_descs; /* Failed to retrieve item from tx ring */
};
struct xdp_options {