vhost_event_idx_interrupt/wake_up_split_ring_vhost_user_cores_with_event_idx_interrupt_mode_16_queues the backend feedback EAL Error when relunch the dpdk-l3fwd

https://bugs.dpdk.org/show_bug.cgi?id=1135

            Bug ID: 1135
           Summary: [DPDK-22.11][asan]vhost_event_idx_interrupt/wake_up_sp
                    lit_ring_vhost_user_cores_with_event_idx_interrupt_mod
                    e_16_queues the backend feedback EAL Error when
                    relunch the dpdk-l3fwd
           Product: DPDK
           Version: 22.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: examples
          Assignee: [email protected]
          Reporter: [email protected]

Target Milestone: ---

[Environment]
DPDK version: Use make showversion or for a non-released version: git remote -v && git show-ref --heads

DPDK 22.11
Other software versions: QEMU 7.1.0
OS: Ubuntu 22.04.1 LTS/5.15.45-051545-generic
Compiler: gcc -11.3.0
Hardware platform: Intel(R) Xeon(R) Platinum 8280M CPU @ 2.70GHz NIC hardware: Ethernet Controller XL710 for 40GbE QSFP+ 1583 NIC firmware: 9.00 0x8000c8d4 1.3179.0
NIC driver: 2.20.12 i40e

[Test Setup]
Steps to reproduce
List the steps to reproduce the issue.

1.Start back-end with dpdk-l3fwd:

x86_64-native-linuxapp-gcc/examples/dpdk-l3fwd-power -l 1 -n 4 \
--file-prefix=dpdk_2497935_20221129174620 --no-pci --log-level=9 \
--vdev 'net_vhost0,iface=/root/dpdk/vhost-net0,queues=1,client=1' \
-- -p 0x1 --parse-ptype 1 --config '(0,0,1)' --interrupt-only

2.Start the front-end with QEMU:

taskset -c 20,21,22,23,24,25,26,27 /home/QEMU/qemu-7.1.0/bin/qemu-system-x86_64 \
-name vm0 -enable-kvm -pidfile /tmp/.vm0.pid -daemonize -monitor \
unix:/tmp/vm0_monitor.sock,server,nowait \
-netdev user,id=nttsip1,hostfwd=tcp:10.239.252.220:6000-:22 \
-device e1000,netdev=nttsip1 -cpu host -smp 8 -m 16384 \
-object memory-backend-file,id=mem,size=16384M,mem-path=/mnt/huge,share=on \
-numa node,memdev=mem -mem-prealloc \
-chardev socket,path=/tmp/vm0_qga0.sock,server,nowait,id=vm0_qga0 \
-device virtio-serial \
-device virtserialport,chardev=vm0_qga0,name=org.qemu.guest_agent.0 \
-vnc :4 -drive file=/home/image/ubuntu2004.img \
-chardev socket,id=char0,path=/root/dpdk/vhost-net0,server \
-netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-device virtio-net-pci,netdev=netdev0,mac=00:11:22:33:44:50,csum=on

3.Quit and relunch the backend.

x86_64-native-linuxapp-gcc/examples/dpdk-l3fwd-power -l 1 -n 4 \
--file-prefix=dpdk_2497935_20221129174620 --no-pci --log-level=9 \
--vdev 'net_vhost0,iface=/root/dpdk/vhost-net0,queues=1,client=1' \
-- -p 0x1 --parse-ptype 1 --config '(0,0,1)' --interrupt-only

[Show the output from the previous commands.]

EAL: Error
op 1 fd -1 epoll_ctl, Bad file descriptor
p 0 q 10 Rx ctl error op 1 epfd -1 vec 11
L3FWD_POWER: RX interrupt won't enable.
EAL: Error
op 1 fd -1 epoll_ctl, Bad file descriptor
p 0 q 6 Rx ctl error op 1 epfd -1 vec 7

L3FWD_POWER: RX interrupt won't enable.
L3FWD_POWER: entering main interrupt loop on lcore 13
L3FWD_POWER:  -- lcoreid=13 portid=0 rxqueueid=12
L3FWD_POWER: entering main interrupt loop on lcore 16
L3FWD_POWER:  -- lcoreid=16 portid=0 rxqueueid=15
EAL: Error

op 1 fd -1 epoll_ctl, Bad file descriptor
p 0 q 14 Rx ctl error op 1 epfd -1 vec 15
L3FWD_POWER: RX interrupt won't enable.
L3FWD_POWER: lcore 2 is waked up from rx interrupt on port 0 queue 1
L3FWD_POWER: -- lcoreid=3 portid=0 rxqueueid=2
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor
p 0 q 9 Rx ctl error op 1 epfd -1 vec 10
L3FWD_POWER: RX interrupt won't enable.
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor
p 0 q 12 Rx ctl error op 1 epfd -1 vec 13

L3FWD_POWER: RX interrupt won't enable.
L3FWD_POWER: entering main interrupt loop on lcore 6
L3FWD_POWER:  -- lcoreid=6 portid=0 rxqueueid=5
L3FWD_POWER: lcore 2 sleeps until interrupt triggers
L3FWD_POWER: entering main interrupt loop on lcore 14
L3FWD_POWER:  -- lcoreid=14 portid=0 rxqueueid=13
L3FWD_POWER: entering main interrupt loop on lcore 1
L3FWD_POWER:  -- lcoreid=1 portid=0 rxqueueid=0
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor

p 0 q 4 Rx ctl error op 1 epfd -1 vec 5
L3FWD_POWER: RX interrupt won't enable.
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor p 0 q 2 Rx ctl error op 1 epfd -1 vec 3
L3FWD_POWER: RX interrupt won't enable.
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor p 0 q 15 Rx ctl error op 1 epfd -1 vec 16
L3FWD_POWER: RX interrupt won't enable.
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor p 0 q 11 Rx ctl error op 1 epfd -1 vec 12

L3FWD_POWER: RX interrupt won't enable.
L3FWD_POWER: entering main interrupt loop on lcore 8
L3FWD_POWER:  -- lcoreid=8 portid=0 rxqueueid=7
VHOST_CONFIG: (/root/dpdk/vhost-net0) read message VHOST_USER_SET_VRING_KICK
VHOST_CONFIG: (/root/dpdk/vhost-net0) vring kick idx:4 file:136
L3FWD_POWER: entering main interrupt loop on lcore 9
L3FWD_POWER:  -- lcoreid=9 portid=0 rxqueueid=8
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor

p 0 q 7 Rx ctl error op 1 epfd -1 vec 8
L3FWD_POWER: RX interrupt won't enable.
VHOST_CONFIG: (/root/dpdk/vhost-net0) read message VHOST_USER_SET_VRING_CALL
VHOST_CONFIG: (/root/dpdk/vhost-net0) vring call idx:4 file:138
L3FWD_POWER: lcore 1 is waked up from rx interrupt on port 0 queue 0
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor
L3FWD_POWER: lcore 1 sleeps until interrupt triggers
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor
p 0 q 8 Rx ctl error op 1 epfd -1 vec 9
L3FWD_POWER: RX interrupt won't enable.
L3FWD_POWER: entering main interrupt loop on lcore 4
L3FWD_POWER: -- lcoreid=4 portid=0 rxqueueid=3
p 0 q 5 Rx ctl error op 1 epfd -1 vec 6
VHOST_CONFIG: (/root/dpdk/vhost-net0) read message VHOST_USER_SET_VRING_NUM
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor
p 0 q 3 Rx ctl error op 1 epfd -1 vec 4
L3FWD_POWER: RX interrupt won't enable.
EAL: Error op 1 fd -1 epoll_ctl, Bad file descriptor
p 0 q 13 Rx ctl error op 1 epfd -1 vec 14
L3FWD_POWER: RX interrupt won't enable.
L3FWD_POWER: RX interrupt won't enable.

[Expected Result]
Explain what is the expected result in text or as an example output:

There is no error information.

[Regression]
Is this issue a regression: Y

Version the regression was introduced: Specify git id if known.

Bad commit:

commit 1c9a7fba5c90e0422b517404499ed106f647bcff (HEAD, refs/bisect/bad)

Author: Mattias Rönnblom <[email protected]>
Date:   Mon Jul 11 14:11:32 2022 +0200

net: accept unaligned data in checksum routines

__rte_raw_cksum() (used by rte_raw_cksum() among others) accessed its data through an uint16_t pointer, which allowed the compiler to assume the data was 16-bit aligned. This in turn would, with certain architectures and compiler flag combinations, result in code with SIMD load or store instructions with restrictions on data alignment.

This patch keeps the old algorithm, but data is read using memcpy() instead of direct pointer access, forcing the compiler to always generate code that handles unaligned input. The _may_alias_ GCC attribute is no longer needed.

The data on which the Internet checksum functions operates are almost always 16-bit aligned, but there are exceptions. In particular, the PDCP protocol header may (literally) have an odd size.

Performance impact seems to range from none to a very slight regression.

Bugzilla ID: 1035

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You are the assignee for the bug.

The below output is from the frontend, correct?

Yux, do you think this commit is the root cause of this issue? As opposed to this commit just being a change which exposed some already-existing issue in l3fwd-power or some library/PMD it uses.