For example, we can divide the queues into latency queues and bulk queues . For bulk queues, either the BULK policy or the CPU policy should be applied, depending on the load of the system. If the applications running on the system all require low latencies or high throughputs, one policy should be applied to all queues. According to the test results, the optimal interrupt moderation for CPU policy isrx-usecs 125andtx-usecs 250. According to the test results, the optimal interrupt moderation for BULK policy isrx-usecs 62andtx-usecs 122.
When you shut down the system, the condition of Windows is similar to the one when the system is booted up. In this Windows 10 guide, we’ll walk you through the steps to deal with the high CPU usage after installing build 18362.329. In this article, we assume that there is an equal interest in latency and throughput performance. So we set the latency and throughput queues to a fixed number. It is important to change the number of dedicated queues accordingly.
Usually, the applications that require high throughput utilize more CPU resources compared to applications that require low latency. This means that if there is an equal interest in latency and throughput performance, it is better to reserve more bulk queues than latency queues. If there are mixed workloads running on the system, we need to divide the queues into different policy groups.
The mixed workload performance tests are conducted for Linux operating system using two Intel® E based platforms as well. The mixed workload consists of several latency-first threads and several throughput-first threads. For details of latency-first threads and throughput-first threads, refer to the Latency performance test and Throughput performance test sections.
For the adaptive interrupt moderation solution,adaptive-rxandadaptive-txare set toON. An application that requires low latency usually uses small message sizes. So only small message sizes are verified in the latency performance test. Since only latency-first threads are running on the system, the LATENCY policy is applied to all queues. The test separately evaluates the latency performance and the throughput performance with the netperf benchmark.
Trend Micro Antivirus+ Security: Best Antivirus For Ransomware Protection
On the lightly loaded system, the best throughput performance can be observed with the BULK policy . On the medium-loaded system, the best throughput performance can be observed with the CPU policy . Furthermore, the CPU policy consumes fewer CPU resources, which leaves other applications with more resources . On the heavily loaded system, the best throughput performance can be observed with the CPU policy as well . The best latency performance can be observed with the LATENCY policy for any system load.
Educause 2018: Software
For the per-queue interrupt moderation solution,adaptive-rxandadaptive-txare set toOFF. Also, the relevant policy is speecy applied to each queue by ethtool.
It was conducted on the Linux operating system using two Intel® E based platforms. The number of the latency queues and the number of bulk queues can vary in different situations.
- The Netpoll checks happen early in most of the Linux network device subsystem code that deals with transmitting or receiving network data.
- Your application can then use this information to hand sockets off to threads running on the desired CPU to help increase data locality and CPU cache hits.
- You can use getsockopt with the SO_INCOMING_CPU option to determine which CPU is processing network packets for a particular socket.
- When the networking device subsystem performs operations on incoming or outgoing data, the netpoll system is checked first to determine if the packet is destined for netpoll.
- This frees the CPU to do other tasks while memory copies are done with hardware.
- Enabling the use of a DMA engine and running code that takes advantage of it, should yield reduced CPU usage.
This adaptive assignment of queues is the next topic we would like to investigate. If the user has an equal interest in latency and throughput performance, the weight is set to 0.5. It is also assumed that the user has equal interest in latency and throughput performance. For the adaptive interrupt moderation solution,adaptive-rxandadaptive-txare set to ON.