What Do I Do If the Network Performance Is Poor When 128 Ethernet Network Devices Are Bound to a BMS?
Symptom
The network performance is poor when multiple Ethernet network devices (for example, 128 single-queue NICs) are bound to an EulerOS 2.3/Euler OS 2.5 BMS. This is because the interrupts of all the 128 NIC queues are processed by the same CPU, causing a critical bottleneck of the CPU and affecting the network performance. The root cause is that --hintpolicy=subset is set for irqbalance of the Euler OS 2.3/Euler OS 2.5 BMS. To solve the problem, change it to --hintpolicy=ignore as instructed in Procedure.
![](https://support.huaweicloud.com/eu/bms_faq/public_sys-resources/note_3.0-en-us.png)
hintpolicy is a policy used by irqbalance to balance interrupts across CPUs based on affinity_hint of each interrupt. affinity_hint indicates the CPU affinity of an interrupt. The value of hintpolicy can be:
- exact: irqbalance never violates affinity_hint.
- subset: irqbalance distributes interrupts to a subset of affinity_hint.
- ignore: irqbalance completely ignores affinity_hint.
Network and Security FAQ FAQs
- Can BMSs of Different Accounts Communicate with Each Other over an Internal Network?
- How Do Two BMSs in the Same Region But in Different AZs Communicate with Each Other?
- Are My BMSs in the Same Subnet?
- Can I Associate a BMS with Multiple Security Groups?
- Can BMSs Communicate with ECSs in the Same VPC?
- What Are the Differences Between the Primary and Extension NICs of BMSs?
- Can I Bind Multiple EIPs to a BMS?
- Can I Configure an EIP?
- Will I Obtain an EIP That Has Been Released?
- What Are the Differences Between EIPs, Private IP Addresses, and Virtual IP Addresses?
- How Can I Modify the Network Configuration or Restart the Network If I Can Log In to a BMS Using Only SSH?
- How Do I Handle the Failure to Ping a CentOS 7 Extension NIC?
- What Do I Do If the Communication Between the Primary NIC and Extension NIC of the BMS is Abnormal?
- How Can I Configure a Static IP Address for a BMS?
- What Do I Do If the Network Performance Is Poor When 128 Ethernet Network Devices Are Bound to a BMS?
Feedback
Was this page helpful?
Provide feedbackThank you very much for your feedback. We will continue working to improve the documentation.
more