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boundary="_000_DM4PR14MB4862B3C1ABF3642E28E916B18DC22DM4PR14MB4862namp_" --_000_DM4PR14MB4862B3C1ABF3642E28E916B18DC22DM4PR14MB4862namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi DPDK Community, I am facing an issue where CPU affinity is not working as expected in RHEL8= with DPDK 20.05, while it works fine in RHEL7. Problem Statement: * When running my program with numactl -C4,5 ./testRTE on RHEL7, the= worker threads correctly bind to the assigned cores. * However, on RHEL8, the worker threads always bind to core 1, ignor= ing the specified CPU set. Environment Details: * DPDK Version: 20.05.0 * OS: RHEL8 (Issue) | RHEL7 (Works Fine) * CPU Affinity Tool: numactl -C Sample Program: Attached Observations: * In RHEL7, worker threads correctly bind to cores specified using numa= ctl -C. * In RHEL8, the threads always bind to core 1, ignoring the CPU set. * Could DPDK be overriding the CPU affinity in RHEL8? Questions: 1. Is there any known change in CPU affinity handling between RHEL7 and = RHEL8 affecting DPDK? 2. Does DPDK override thread affinity when rte_eal_init() is called? 3. Is there any workaround or EAL flag to ensure that CPU affinity is re= spected? Any insights or suggestions would be greatly appreciated. Thanks, Rashi Agarwal. --_000_DM4PR14MB4862B3C1ABF3642E28E916B18DC22DM4PR14MB4862namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi DPDK Community,

I am facing an issue where CPU affinity is not working as expected in RHEL8 with DPDK 20.05, while it works fine in RHEL7.

Problem Statement:

      ·  When running= my program with numactl -C4,5 = ./testRTE on RHEL7, the worker threads correctly bind to the assigned cores.=

      ·  However, on RHEL8, the worker threads always bind to core 1, ignoring the= specified CPU set.

 

Environment Details:

  • DPDK Versi= on: 20.05.0
  • OS:= RHEL8 (I= ssue) | RHEL7 (Works Fine)
  • CPU Affini= ty Tool: numactl -C
    • <= /ul>

    Sample Program:  Attached

    Observations:

    • In RHEL7, worker threads correctly bind to cores specified using numactl -C.
      • =
    • In RHEL8, the threads always bind to core 1, ignoring the CPU set.
    • Could DPDK be= overriding the CPU affinity in RHEL8?

    Questions:

    1. Is there any = known change in CPU affinity handling between RHEL7 and RHEL8 affecting DPD= K?
    2. Does DPDK ove= rride thread affinity when rte_eal_init() is called?
    3. Is there any = workaround or EAL flag to ensure that CPU affinity is respected?=

    Any = insights or suggestions would be greatly appreciated.

    Thanks,

    Rashi Agarwal.

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