Application Scenarios
Ideal for network- or I/O-heavy services with high interrupt frequency, this feature minimizes interrupt delays and maximizes service throughput.
New Kunpeng 920 processor models support the following interrupt passthrough types.
Passthrough Type |
Mechanism & Impact |
Applicable Scenario |
|---|---|---|
GICv4.1 vLPI passthrough |
Injects Virtual Function I/O (VFIO) device interrupts into VMs via GICv4.0/4.1, bypassing vm-exit/entry. |
Reduces interrupt latency and improves throughput for network- or I/O-intensive workloads. |
GICv4.1 virtual device interrupt passthrough |
Injects virtio device interrupts into VMs via Kunpeng-optimized GICv4.1, bypassing vm-exit/entry. |
Reduces interrupt latency and improves throughput for network- or I/O-intensive workloads. |
GICv4.1 vSGI Passthrough |
Injects vCPU inter-processor interrupts (IPIs) into VMs via GICv4.1, bypassing vm-exit/entry. |
Lowers IPI latency and boosts performance in multi-core IPI-heavy scenarios. |
GICv4.1 virtual timer passthrough |
Injects vtimer interrupts into VMs via GICv4.1 enhanced by Kunpeng-developed MBIGEN, bypassing vm-exit/entry. |
Reduces latency for timer-intensive workloads and improves OS scheduling efficiency in high-frequency scheduling scenarios. |