xsk: TX metadata Launch Time support #8317
Open
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
![kernel-patches-daemon-bpf[bot]](https://avatars.githubusercontent.com/u/70728002?s=60&v=4){kind=small}
|
Upstream branch: 96ea081 |
kernel-patches-daemon-bpf
bot
force-pushed
the
bpf-next_base
branch
from
2db328a to
716c9e0
Compare
|
Upstream branch: 73b9075 |
kernel-patches-daemon-bpf
bot
force-pushed
the
series/806339=>bpf-next
branch
from
f3c1271 to
81acc67
Compare
kernel-patches-daemon-bpf
bot
force-pushed
the
bpf-next_base
branch
from
716c9e0 to
c1d981b
Compare
|
Upstream branch: 8c21f88 |
kernel-patches-daemon-bpf
bot
force-pushed
the
series/806339=>bpf-next
branch
from
81acc67 to
bd8dfc3
Compare
kernel-patches-daemon-bpf
bot
force-pushed
the
bpf-next_base
branch
from
c1d981b to
b58ecc3
Compare
|
Upstream branch: 2532608 |
kernel-patches-daemon-bpf
bot
force-pushed
the
series/806339=>bpf-next
branch
from
bd8dfc3 to
ec30756
Compare
kernel-patches-daemon-bpf
bot
added
V4-ci-fail
needs-ack
and removed
V4-ci-pass
new
labels
kernel-patches-daemon-bpf
bot
force-pushed
the
bpf-next_base
branch
from
b58ecc3 to
5c57fa7
Compare
|
Upstream branch: 859a7db |
kernel-patches-daemon-bpf
bot
force-pushed
the
series/806339=>bpf-next
branch
from
ec30756 to
71e88f3
Compare
kernel-patches-daemon-bpf
bot
force-pushed
the
bpf-next_base
branch
from
5c57fa7 to
2410e16
Compare
Extend the XDP Tx metadata framework so that user can requests launch time hardware offload, where the Ethernet device will schedule the packet for transmission at a pre-determined time called launch time. The value of launch time is communicated from user space to Ethernet driver via launch_time field of struct xsk_tx_metadata. Suggested-by: Stanislav Fomichev <[email protected]> Signed-off-by: Song Yoong Siang <[email protected]>
Add Launch Time hw offload request to xdp_hw_metadata. User can configure the delta of launch time to HW RX-time by using "-l" argument. The default delta is 100,000,000 nanosecond. Signed-off-by: Song Yoong Siang <[email protected]>
Enable launch time (Time-Based Scheduling) support to XDP zero copy via XDP
Tx metadata framework.
This patch is tested with tools/testing/selftests/bpf/xdp_hw_metadata on
Intel Tiger Lake platform. Below are the test steps and result.
Test Steps:
1. Add mqprio qdisc:
$ sudo tc qdisc add dev enp0s30f4 handle 8001: parent root mqprio num_tc
4 map 0 1 2 3 3 3 3 3 3 3 3 3 3 3 3 3 queues 1@0 1@1 1@2 1@3 hw 0
2. Enable launch time hardware offload on hardware queue 1:
$ sudo tc qdisc replace dev enp0s30f4 parent 8001:2 etf offload clockid
CLOCK_TAI delta 500000
3. Add an ingress qdisc:
$ sudo tc qdisc add dev enp0s30f4 ingress
4. Add a flower filter to route incoming packet with VLAN priority 1 into
hardware queue 1:
$ sudo tc filter add dev enp0s30f4 parent ffff: protocol 802.1Q flower
vlan_prio 1 hw_tc 1
5. Enable VLAN tag stripping:
$ sudo ethtool -K enp0s30f4 rxvlan on
6. Start xdp_hw_metadata selftest application:
$ sudo ./xdp_hw_metadata enp0s30f4 -l 1000000000
7. Send an UDP packet with VLAN priority 1 to port 9091 of DUT.
When launch time is set to 1s in the future, the delta between launch time
and transmit hardware timestamp is equal to 16.963us, as shown in result
below:
0x55b5864717a8: rx_desc[4]->addr=88100 addr=88100 comp_addr=88100 EoP
No rx_hash, err=-95
HW RX-time: 1734579065767717328 (sec:1734579065.7677) delta to User RX-time sec:0.0004 (375.624 usec)
XDP RX-time: 1734579065768004454 (sec:1734579065.7680) delta to User RX-time sec:0.0001 (88.498 usec)
No rx_vlan_tci or rx_vlan_proto, err=-95
0x55b5864717a8: ping-pong with csum=5619 (want 0000) csum_start=34 csum_offset=6
HW RX-time: 1734579065767717328 (sec:1734579065.7677) delta to HW Launch-time sec:1.0000 (1000000.000 usec)
0x55b5864717a8: complete tx idx=4 addr=4018
HW Launch-time: 1734579066767717328 (sec:1734579066.7677) delta to HW TX-complete-time sec:0.0000 (16.963 usec)
HW TX-complete-time: 1734579066767734291 (sec:1734579066.7677) delta to User TX-complete-time sec:0.0001 (130.408 usec)
XDP RX-time: 1734579065768004454 (sec:1734579065.7680) delta to User TX-complete-time sec:0.9999 (999860.245 usec)
HW RX-time: 1734579065767717328 (sec:1734579065.7677) delta to HW TX-complete-time sec:1.0000 (1000016.963 usec)
0x55b5864717a8: complete rx idx=132 addr=88100
Signed-off-by: Song Yoong Siang <[email protected]>
Enable Launch Time Control (LTC) support to XDP zero copy via XDP Tx
metadata framework.
This patch is tested with tools/testing/selftests/bpf/xdp_hw_metadata on
Intel Tiger Lake platform. Below are the test steps and result.
Test Steps:
1. Add mqprio qdisc:
$ sudo tc qdisc add dev enp2s0 handle 8001: parent root mqprio num_tc 4
map 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 queues 1@0 1@1 1@2 1@3 hw 0
2. Enable launch time hardware offload on hardware queue 1:
$ sudo tc qdisc replace dev enp2s0 parent 8001:2 etf offload clockid
CLOCK_TAI delta 500000
3. Change RSS to route all incoming IP packets into hardware queue 1:
$ sudo ethtool -X enp2s0 start 1 equal 1
4. Start xdp_hw_metadata selftest application:
$ sudo ./xdp_hw_metadata enp2s0 -l 1000000000
5. Send an UDP packet to port 9091 of DUT.
$ echo -n xdp | nc -u -q0 169.254.1.1 9091
When launch time is set to 1s in the future, the delta between launch time
and transmit hardware timestamp is equal to 0.016us, as shown in result
below:
0x562ff5dc8880: rx_desc[4]->addr=84110 addr=84110 comp_addr=84110 EoP
rx_hash: 0xE343384 with RSS type:0x1
HW RX-time: 1734578015467548904 (sec:1734578015.4675) delta to User RX-time sec:0.0002 (183.103 usec)
XDP RX-time: 1734578015467651698 (sec:1734578015.4677) delta to User RX-time sec:0.0001 (80.309 usec)
No rx_vlan_tci or rx_vlan_proto, err=-95
0x562ff5dc8880: ping-pong with csum=561c (want c7dd) csum_start=34 csum_offset=6
HW RX-time: 1734578015467548904 (sec:1734578015.4675) delta to HW Launch-time sec:1.0000 (1000000.000 usec)
0x562ff5dc8880: complete tx idx=4 addr=4018
HW Launch-time: 1734578016467548904 (sec:1734578016.4675) delta to HW TX-complete-time sec:0.0000 (0.016 usec)
HW TX-complete-time: 1734578016467548920 (sec:1734578016.4675) delta to User TX-complete-time sec:0.0000 (32.546 usec)
XDP RX-time: 1734578015467651698 (sec:1734578015.4677) delta to User TX-complete-time sec:0.9999 (999929.768 usec)
HW RX-time: 1734578015467548904 (sec:1734578015.4675) delta to HW TX-complete-time sec:1.0000 (1000000.016 usec)
0x562ff5dc8880: complete rx idx=132 addr=84110
Signed-off-by: Song Yoong Siang <[email protected]>
|
Upstream branch: f44275e |
kernel-patches-daemon-bpf
bot
force-pushed
the
series/806339=>bpf-next
branch
from
71e88f3 to
37edf43
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Pull request for series with
subject: xsk: TX metadata Launch Time support
version: 4
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=922552