When configuring pmd sleep in templates:
ComputeOvsDpdkSriovParameters:
OvsPmdSleepMax: 50
 
I see that configuration generated is pmd-maxsleep
[root@compute-0 tripleo-admin]# ovs-vsctl get Open_vSwitch . other_config
{dpdk-extra=" -n 4", dpdk-init="true", dpdk-lcore-mask="300003", dpdk-socket-limit="4096,1024", dpdk-socket-mem="4096,1024", pmd-auto-lb="true", pmd-auto-lb-improvement-threshold="10", pmd-auto-lb-load-threshold="75", pmd-auto-lb-rebal-interval="1", pmd-cpu-mask=c0000c, pmd-maxsleep="50", vhost-postcopy-support="true"}
 
As per the documentation , it looks like it should be used pmd-sleep-max

Seen in RHOS-17.1-RHEL-9-20250801.n.1