https://bugs.dpdk.org/show_bug.cgi?id=1475

            Bug ID: 1475
           Summary: [dpdk-24.07] l3fwd performance drop 20% on Ubuntu24.04
           Product: DPDK
           Version: 24.07
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: examples
          Assignee: dev@dpdk.org
          Reporter: yingyax.han@intel.com
  Target Milestone: ---

The performance of L3FWD has decreased by 20% on Ubuntu 24.04, which is normal
on Ubuntu 22.04.

[Environment]
DPDK version: 24.07.0-rc0
OS: Ubuntu 24.04 LTS (Noble Numbat); 6.8.0-31-generic
Compiler: gcc version 13.2.0
Hardware platform: Intel(R) Xeon(R) Platinum 8380 CPU @ 2.30GHz
NIC hardware: E810-CQDA2 

Steps to reproduce
1. Bind 1 port to vfio-pci driver:
dpdk-devbind.py --force --bind=vfio-pci 0000:31:00.0

2.Start L3FWD as the following command:
dpdk-l3fwd -l 5-8 -n 8 --force-max-simd-bitwidth=512 -- -p 0x1 --config 
'(0,0,5),(0,1,6),(0,2,7),(0,3,8)' --tx-queue-size 2048 --rx-queue-size 2048

3.Start transmitting traffic from ixia.
transmit rate: 100%
frame size: 64
IP/fixed dst, ramdom src

4.Actual Result.
| Fwd_core | Frame Size | Throughput
| 4C/4Q    | 64         | 90 Mpps 

5.Expected Result.
it's passed on Ubuntu 22.04 (Kernel: 5.15.0-102-generic)
| Fwd_core | Frame Size | Throughput
| 4C/4Q    | 64         | 116 Mpps

-- 
You are receiving this mail because:
You are the assignee for the bug.