Latency is considered as the delayed time in communication where RTT is higher than normal. Many other factors like distance between the source and destination, number of hops between them and their status etc also impacts the latency. LINUX SPECIFIC:

In computing, interrupt latency is the time that elapses from when an interrupt is generated to when the source of the interrupt is serviced. For many operating systems, devices are serviced as soon as the device's interrupt handler is executed. Nov 22, 2013 · Intel® Memory Latency Checker (Intel® MLC) is a tool used to measure memory latencies and b/w, and how they change with increasing load on the system. It also provides several options for more fine-grained investigation where b/w and latencies from a specific set of cores to caches or memory can be measured as well. The difference in latency should be the time to send one low priority packet. With a 100Mbps link, mtu=1500, that is roughly 150 us. My test system has two linux boxes connected by a crossover cable. Dec 23, 2019 · But reducing latency usually also affects throughput, so there’s a balance that needs to be maintained between getting a lot of work done (high throughput) and scheduling tasks as soon as they’re ready to run (low latency). The Linux kernel supports multiple preemption models so that you can tune the preemption behaviour for your workload. I am running a test and measuring latency. I have one Linux process sending two bytes out the port and then listens for two incoming bytes. The other process receives two bytes and immediately sends two bytes back. I'm measuring this round trip latency to be around 1500 microseconds with a standard deviation of about 40 microseconds. Sep 21, 2017 · H ow do I monitor disk I/O latency in real time on Linux, FreeBSD, OpenBSD, and MacOS operating system? You can use ioping tool to monitor I/O latency in real time. It shows disk latency in the same way as ping command shows network latency on Linux or Unix-like system.

5 Tips to Reduce Latency in Internet Connection (Quick Tips)

linux - where can I find the disk latency using iostat I'm using Redhat Linux 6.5 and would like to see the disk latencies for the used disks. Using iostat I get the columns await and svctm ( including %util ). But according to the man page of iostat the columns svctm are obsolete and should not be used any more . Again the await column shows avg request latency … Latency in Blob storage - Azure Storage | Microsoft Docs Latency in Blob storage. 09/05/2019; 4 minutes to read; In this article. Latency, sometimes referenced as response time, is the amount of time that an application must wait for a request to complete.

There has always been a recuring issue though: audio latency. Audio Latency. To make it simple, we’ll consider two main sources of audio latency: the audio server & the audio source (Wine/the game). Usually, Linux distros nowadays are shipped with PulseAudio. It is a very capable, modern audio server providing many functionalities.

Latency of Raspberry Pi 3 on Standard and Real-Time Linux Oct 03, 2017