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From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [DPDK/core Bug 1935] rte_lcore_to_cpu_id returns incorrect cpu-id
 when `lcore-map or re-map lcore` option used
Date: Sat, 11 Apr 2026 13:14:30 +0000
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X-Bugzilla-Version: 26.03
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http://bugs.dpdk.org/show_bug.cgi?id=3D1935

            Bug ID: 1935
           Summary: rte_lcore_to_cpu_id returns incorrect cpu-id when
                    `lcore-map or re-map lcore` option used
           Product: DPDK
           Version: 26.03
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: dev@dpdk.org
          Reporter: vipin.varghese@amd.com
  Target Milestone: ---

DPDK: 26.03
test application: modified examples/helloworld
cmd:=20
 working: `./build/helloworld -l0,1,67,14,33`
 faulty-1: `./build/helloworld -l0,1,67,14,33 -R`=20
 faulty-2: `./build/helloworld -l0@8,1@18,2@67,3@14,4@33`

expected behaviour: if there are eal args for remap or map lcore, the API (=
as
per current understanding) should return the actual core on which it runs. =
API
`rte_lcore_cpuset` returns a valid value in all cases.

attaching screenshot for reference

--=20
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