This parameter is a kernel module parameter of type int (integer). It controls whether threaded interrupt handling is enabled. Enabling Threaded IRQs can improve real-time performance and responsiveness.

Applicable scenario

When you use an ECS instance with NVMe SSD local storage, all I/O interrupts may be routed to a single CPU. If the software interrupt (SI) load on that CPU reaches 100%, failures may occur. You can enable threaded interrupts through the use_threaded_interrupts parameter to improve real-time performance and responsiveness.

warning

In this solution, a new irq process is added, which increases the CPU overhead of the instance and occupies part of the CPU resources.

Procedure

Execute the following command to enable threaded interrupts by modifying the use_threaded_interrupts parameter.

rmmod nvme nvme_core
modprobe nvme use_threaded_interrupts=1

After you modify the parameter, you can use the FIO command to test the volume performance by following instructions provided in Testing local volume performance.

Last updated: 2026.06.18 17:49:52

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