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  1. Fast Datapath Product
  2. FDP-2265

dpdk-intr thread running at 100% CPU time

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    • Icon: Epic Epic
    • Resolution: Unresolved
    • Icon: Major Major
    • None
    • rhel-9
    • ovs-dpdk
    • None
    • dpdk-intr thread running at 100% CPU time
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      Please mark each item below with ( / ) if completed or ( x ) if incomplete:

      ( ) The acceptance criteria defined below are met.

      Given a RHEL compute node running OVS-DPDK with DPDK 24.11.1+ and at least one DPDK interface using dpdk-lsc-interrupt=true,

      When a sysadmin monitors the dpdk-intr thread for 60 seconds during steady-state traffic,

      Then, that thread does not consume 100% of CPU time and each epoll_wait calls include sleeping between genuine link events.

      ( ) The epics work is available in a downstream build (nightly/Async or other)

      ( ) All cards under the epic have been moved to Done

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      Please mark each item below with ( / ) if completed or ( x ) if incomplete: ( ) The acceptance criteria defined below are met. Given a RHEL compute node running OVS-DPDK with DPDK 24.11.1+ and at least one DPDK interface using dpdk-lsc-interrupt=true, When a sysadmin monitors the dpdk-intr thread for 60 seconds during steady-state traffic, Then, that thread does not consume 100% of CPU time and each epoll_wait calls include sleeping between genuine link events. ( ) The epics work is available in a downstream build (nightly/Async or other) ( ) All cards under the epic have been moved to Done
    • rhel-9
    • rhel-net-ovs-dpdk
    • 100% To Do, 0% In Progress, 0% Done
    • ssg_networking

      This epic tracks all the effort needed to deliver the solution related to the bug described below.
      Compute node deployed with OVS-DPDK has dpdk-intr thread running at 100%

      dpdk_version : "DPDK 24.11.1"
      ovs_version : "3.5.1-19.el9fdp"

      PMD threads appear idle at 1%.

      # cat /etc/rhoso-release 
Red Hat OpenStack Services on OpenShift release 18.0.10 (Antelope)

Threads:  47 total,   1 running,  46 sleeping,   0 stopped,   0 zombie                                                                                                                                                                                 [47/1999]
%Cpu(s):  0.3 us,  0.6 sy,  0.0 ni, 99.1 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
MiB Mem : 514893.6 total,  45270.5 free, 469786.0 used,   2695.7 buff/cache
MiB Swap:   1024.0 total,   1024.0 free,      0.0 used.  45107.6 avail Mem                                                                                                                                                                                      
                                                                
    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
   3719 openvsw+  10 -10  259.2g 209992  10240 R  99.7   0.0   1055:59 dpdk-intr
   7232 openvsw+  10 -10  259.2g 209992  10240 S   1.0   0.0   7:20.69 pmd-c33/id:37
   7237 openvsw+  10 -10  259.2g 209992  10240 S   1.0   0.0   7:24.50 pmd-c99/id:42
   7238 openvsw+  10 -10  259.2g 209992  10240 S   1.0   0.0   7:21.87 pmd-c100/id:43
   7239 openvsw+  10 -10  259.2g 209992  10240 S   1.0   0.0   7:22.60 pmd-c97/id:44
   7233 openvsw+  10 -10  259.2g 209992  10240 S   0.7   0.0   7:18.02 pmd-c98/id:38
   7234 openvsw+  10 -10  259.2g 209992  10240 S   0.7   0.0   7:21.49 pmd-c36/id:39

              ovsdpdk-bot ovsdpdk bot
              rhn-support-fpalin Francois Palin
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                Created:
                Updated: