[DPDK/core Bug 2072] [dpdk26.11-rc1] power_intel_uncore: start dpdk-l3fwd-power failed on Ubuntu26.04

[bugzilla@dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=2072

            Bug ID: 2072
           Summary: [dpdk26.11-rc1] power_intel_uncore: start
                    dpdk-l3fwd-power failed on Ubuntu26.04
           Product: DPDK
           Version: 26.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: dev@dpdk.org
          Reporter: daxuex.gao@intel.com
  Target Milestone: ---

Environment
===========
DPDK version: dpdk-v26.11-rc1 (9a45341f18a1a)
OS: Ubuntu 26.04.1 LTS/Linux 7.0.0-38-generic
Compiler: gcc version 15.2.0 (Ubuntu 15.2.0-16ubuntu1)
NIC hardware: Ethernet Controller E810-C for SFP 1593 [8086:1593 (rev 01)]
NIC firmware: 
  driver: vfio-pci
  kdriver: ice-2.6.7
  fw: 5.01 0x80021f88 1.4031.0
  ddp: ICE OS Package version 1.3.59.0

Test Setup
Steps to reproduce
==================
1.Build dpdk 
CC=gcc meson -Dlibdir=lib  --default-library=static x86_64-native-linuxapp-gcc
ninja -C x86_64-native-linuxapp-gcc
meson configure -Dexamples=l3fwd-power x86_64-native-linuxapp-gcc
ninja -C x86_64-native-linuxapp-gcc

2.Start dpdk-l3fwd-power
x86_64-native-linuxapp-gcc/examples/dpdk-l3fwd-power  -l 1-2 -n 1 -- -p 0x1 -P
--config="(0,0,2)" -U

Results: 
========
# x86_64-native-linuxapp-gcc/examples/dpdk-l3fwd-power  -l 1-2 -n 1 -- -p 0x1
-P --config="(0,0,2)" -U
EAL: Detected CPU lcores: 224
EAL: Detected NUMA nodes: 8
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: VFIO support initialized: group mode, IOVA as VA
EAL: Selected IOVA mode 'VA'
Promiscuous mode selected
L3FWD_POWER: Operating mode not specified, probing frequency scaling support...
L3FWD_POWER: Selected operation mode: legacy
POWER: Env isn't set yet!
POWER: Attempting to initialise acpi cpufreq power management...
POWER: acpi-cpufreq driver is not supported
POWER: Attempting to initialise amd-pstate cpufreq power management...
POWER: amd-pstate driver is not supported
POWER: Attempting to initialise cppc cpufreq power management...
POWER: cppc_cpufreq driver is not supported
POWER: Attempting to initialise intel-pstate cpufreq power management...
POWER: Initialized successfully for lcore 1 power management
POWER: Initialized successfully for lcore 2 power management
EAL: Error - exiting with code: 1
init_power_library failed


Expected Result:
Startup successful 

Regression
Is this issue a regression: N

Bad commit:
commit 384d6f309cac7bc95ce8d515e8929b3cfd1b4a48 (HEAD)
Author: Huisong Li <lihuisong@huawei.com>
Date:   Wed Aug 12 17:49:54 2026 +0800
    examples/l3fwd-power: relocate uncore initialization
    Currently, the deinitialization of uncore is in deinit_power_library().
    But its initialization is located in the parameter parsing function,
    which is not good to maintain.
    So move this logic to init_power_library().
    Signed-off-by: Huisong Li <lihuisong@huawei.com>

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