Binding Threads to CPU Cores

After SPDK is started and bound to a device, the vhost process of SPDK calls the librbd interface of Ceph to create a device and generates client threads msgr-worker, tp_librbd, and fn_radosclient of the corresponding RBD. These threads need to be bound to CPU cores.

1. Create a core binding script.

   cd /home
   vi bondcore.sh

2. Add the following content to the script:

   1 2 3 4 5 6 7

   pid= rm -rf pid ps -T -p `pidof vhost` |grep -E 'tp_lib|radosclient|msg' > pid while read line;do pid=$(echo $line | awk -F " " '{print $2}') taskset -pc 4-12 $pid done < pid

   

   • taskset -pc 4-12 indicates that the Ceph threads are bound to physical CPUs 4 to 12. Change the value based on the actual scenario.
   • This script must be executed after a device is created and the VM is started.