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116 Commits

Author SHA1 Message Date
Jesper Dangaard Brouer
9ba52af3b4 AF_XDP-interaction: Enable libbpf pr_debug via --debug 
Like described in guide:
 https://facebookmicrosites.github.io/bpf/blog/2020/02/20/bcc-to-libbpf-howto-guide.html#libbpf-log

Enable extra libbpf debug printing when --debug gets
specified as option to our program.

This is acheived via setting a custom log handler via
libbpf API call libbpf_set_print().

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2022-01-07 17:30:53 +01:00
Jesper Dangaard Brouer
f3d5d3ca93 AF_XDP-interaction: cmdline options for MAC-addresses 
Change Ethernet MAC in transmitted frames
 via cmdline options (-G|--tx-dmac) or (-H|--tx-smac)

Based on suggestion from: Ong Boon Leong <boon.leong.ong@intel.com>
 https://lore.kernel.org/all/20211124091821.3916046-3-boon.leong.ong@intel.com/

Suggested-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-14 13:52:27 +01:00
Jesper Dangaard Brouer
b71f7f8cac AF_XDP-interaction: Add cmdline option for enable/disabling busy-poll mode 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-14 12:26:12 +01:00
Jesper Dangaard Brouer
3685d5ea93 AF_XDP-interaction: Try preferred busy-polling trick 
The apply_setsockopt() was taken from samples/bpf/xdpsock_user.c

Testing with --zero-copy this unfortunately doesn't solve
the issue of 8 packets bulks when requesting 4.
Notice this test was with driver igc and chip i225.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-13 23:01:09 +01:00
Jesper Dangaard Brouer
842c707c4e AF_XDP-interaction: Try adding XDP_USE_NEED_WAKEUP 
Measurements on a receiver shows that TX doesn't happen immediately.
Even when calling sendto() for doing TX kick.

Added bind flag XDP_USE_NEED_WAKEUP, but this didn't help.

TX burst 4 packets, but in --zero-copy mode we often observe
8 packets arriving in a burst.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-13 21:34:14 +01:00
Jesper Dangaard Brouer
185431e6d8 AF_XDP-interaction: convert to tx_cyclic_and_rx_process 
Function now also RX process packet after cyclic TX.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-13 20:45:11 +01:00
Jesper Dangaard Brouer
95a5a31c90 AF_XDP-interaction: add tx_cyclic_batch 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-13 20:03:39 +01:00
Jesper Dangaard Brouer
1750679402 AF_XDP-interaction: Move invent_tx_pkts() out of tx_batch_pkts 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-13 18:25:58 +01:00
Jesper Dangaard Brouer
56ba3a10df AF_XDP-interaction: Implement a TX batching function 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-07 18:12:11 +01:00
Jesper Dangaard Brouer
8b02218dde AF_XDP-interaction: Move function tx_pkt 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-07 15:55:30 +01:00
Jesper Dangaard Brouer
bd49ff6ca8 AF_XDP-interaction: Issue with XDP link down/up 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-07 15:35:51 +01:00
Jesper Dangaard Brouer
bb86dc7f1b AF_XDP-interaction: Adjust error msg 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-07 15:29:39 +01:00
Jesper Dangaard Brouer
709607bfdd AF_XDP-interaction: Fix pointer to UDP data area for memset 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-03 23:12:20 +01:00
Jesper Dangaard Brouer
1e8ad22fe0 AF_XDP-interaction: Limit FQ refill size 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-03 22:56:19 +01:00
Jesper Dangaard Brouer
37d4f466dd AF_XDP-interaction: Fix bug in mem_frame_allocator 
The assumption was that our simple memory allocator for umem
frames return an addr that point to the start of the frame.

When a frame addr is freed/returned via mem_free_umem_frame()
this frame addr doesn't necessary point to the start of the
frame.  Often this is not the case.  As the kernel RX process
will add some headroom.  Our userspace TX process can also choose
to add headroom, resulting in frames returned in Completion Queue
will also have this headroom offset in the addr.

Fix by removing headroom offset when freeing/returning the
frame addr in mem_free_umem_frame().

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-03 22:30:30 +01:00
Jesper Dangaard Brouer
ea8b2df6aa AF_XDP-interaction: packet TX test 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-03 21:35:02 +01:00
Jesper Dangaard Brouer
25e8873f2f AF_XDP-interaction: Packet fill helpers 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-03 18:06:39 +01:00
Jesper Dangaard Brouer
c3ca3a6ffc AF_XDP-interaction: Add debug function pr_addr_info() 
The packet umem addr can be an offset into the packet.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-12-03 17:44:13 +01:00
Jesper Dangaard Brouer
76af06aaab AF_XDP-interaction: Start on new tx and rx batch process code 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-29 16:02:57 +01:00
Jesper Dangaard Brouer
021d262a0b AF_XDP-interaction: Debug RX-batch processing 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-24 17:54:52 +01:00
Jesper Dangaard Brouer
9584e53e57 AF_XDP-interaction: Record NIC chip used 
As drivers supports multiple chips.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-24 17:10:20 +01:00
Jesper Dangaard Brouer
457a7a5e1e AF_XDP-interaction: Add results from system with RT kernel 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-24 17:06:25 +01:00
Jesper Dangaard Brouer
46cc148a03 AF_XDP-interaction: Add spin results from system B 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-19 16:21:33 +01:00
Jesper Dangaard Brouer
d5ff1ac505 AF_XDP-interaction: Adjust formatting#2, test GitHub rendering 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-19 16:12:14 +01:00
Jesper Dangaard Brouer
5a45bcbb16 AF_XDP-interaction: Adjust formatting, test GitHub rendering 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-19 16:07:18 +01:00
Jesper Dangaard Brouer
ff01e2a300 AF_XDP-interaction: Collect interesting data-points 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-19 15:43:45 +01:00
Jesper Dangaard Brouer
987dd6a15d AF_XDP-interaction: Crude stats on time-delay 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-19 15:10:43 +01:00
Jesper Dangaard Brouer
5e31a04734 AF_XDP-interaction: Update results table 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-19 14:49:21 +01:00
Jesper Dangaard Brouer
d22c08c231 AF_XDP-interaction: Add some time-delay XDP to AF_XDP results 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-19 14:41:58 +01:00
Jesper Dangaard Brouer
1bb141e9e3 Extend xdp_hints_rx_time with xdp_rx_cpu 
The latency or time-delay between XDP and AF_XDP depend highly
on whether the XDP and AF_XDP runs on same CPU or remote CPU.

Extend xdp_hints_rx_time, without worrying about the layout
as BTF will adjust, so we can determine case of same CPU or
remote CPU.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-19 14:33:58 +01:00
Jesper Dangaard Brouer
1ba7209fd4 AF_XDP-interaction: README why RX-ktime matters 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-19 13:41:27 +01:00
Jesper Dangaard Brouer
01aa47c814 AF_XDP-interaction: Disable stats poll as it is broken 
The stats poll doesn't take into account multiple XSK sockets.
Simply disable until there is time to fix it.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 20:46:46 +01:00
Jesper Dangaard Brouer
446653f4b4 AF_XDP-interaction: Add option for real-time priority 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 20:12:04 +01:00
Jesper Dangaard Brouer
e9ec65d667 AF_XDP-interaction: README: Explaning XDP-hints via local BTF info 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 19:45:43 +01:00
Jesper Dangaard Brouer
ae4f6a5846 AF_XDP-interaction: Print XSK queue_id packet was RXed on 
Now that program process all queues it is relevant to know
what queue_id received the packet.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 18:49:06 +01:00
Jesper Dangaard Brouer
732bd6ec41 AF_XDP-interaction: This example bind to all queues 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 18:07:09 +01:00
Jesper Dangaard Brouer
0f08e825bd AF_XDP-interaction: README update AF_XDP documentation section 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 17:44:27 +01:00
Jesper Dangaard Brouer
f5833725cc AF_XDP-interaction: Fix xsk_bind_flags options 
This allows enabling another AF_XDP mode e.g. --zero-copy.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 17:12:29 +01:00
Jesper Dangaard Brouer
37f00015b6 AF_XDP-interaction: Cleanups 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 17:10:34 +01:00
Jesper Dangaard Brouer
a80aab5ae7 AF_XDP-interaction: Allocate more frame when we have more queues 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 16:29:38 +01:00
Jesper Dangaard Brouer
e558ab94e2 Make simple mem_frame_allocator more dynamic 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 16:07:35 +01:00
Jesper Dangaard Brouer
34dd6fc6c4 AF_XDP-interaction: Refactor a bit 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 15:53:56 +01:00
Jesper Dangaard Brouer
ca9ef962de AF_XDP-interaction: Update ethtool_utils 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 15:24:31 +01:00
Jesper Dangaard Brouer
9bca7ea4ff AF_XDP-interaction: Implement ethtool_get_max_queues 
Need to get configured queues on the NIC device

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 13:03:38 +01:00
Jesper Dangaard Brouer
9c3a6a7a9d AF_XDP-interaction: Default to AF_XDP copy mode 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-16 12:10:04 +01:00
Jesper Dangaard Brouer
8806cf2264 AF_XDP-interaction: refactor FQ+CQ per xsk_socket_info 
Cannot share/associate the FQ (Fill Queue) and CQ (Completion Q) with
umem container (xsk_umem_info).  This is the reason current program
cannot handle packets for each queue ID.

As described in [1] we need more FQ and CQ ring pairs, a pair per for each
unique netdev and queue IP tuple.

Thus, add FQ and CQ for each queue id in struct xsk_socket_info.

[1] https://www.kernel.org/doc/html/latest/networking/af_xdp.html

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-15 12:54:22 +01:00
Jesper Dangaard Brouer
529256b00c Mannally insert XSK FDs into xsks_map 
Do like enter_xsks_into_map() in kernels xdpsock_user.c

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-12 22:19:45 +01:00
Jesper Dangaard Brouer
062b5d96fb AF_XDP-interaction: call handle_receive_packets on all XSKs 
Strangely multiple RX-queues still doesn't work

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-12 22:03:13 +01:00
Jesper Dangaard Brouer
e0b044085c AF_XDP-interaction: Processing multiple XSKs doesn't work 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-12 20:52:23 +01:00
Jesper Dangaard Brouer
cf47f471aa AF_XDP-interaction: Handle queue id per xsk socket 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
 2021-11-12 19:15:25 +01:00