Latency is the time difference between the start of an event and the time that the effects become noticeable.

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Network Emulation on a Bridge?

When I try to use Network Emulator for Windows Toolkit on a bridge or Ethernet adapter connected to the bridge it has no affect on the machine connected via the bridge. Could somebody explain how to ...
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17 views

Router that supports ping based QoS out of the box [on hold]

I am looking for a router whose built in firmware can ensure QoS such that if one user is say downloading torrents (completely hogging up the bandwidth) it will slow his speed down to the point that ...
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2answers
26 views

Tracking Bandwidth & Latency in Linux [on hold]

I'm trying to write a simple script that can detect dips in network traffic (both bandwidth and latency in both directions) between 2 arbitrary hosts in my network over time. Is there a tool to do ...
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39 views

Many Transition from drive PhyRdy to PhyNRdy causing latencies in Windows 7?

My old Windows 7 pro sp1 laptop is becoming slow. It freezes randomly for between 1 and 3 seconds before displaying a context menu, or when switching between windows. After long searches, I suspect ...
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16 views

GNU/Linux distro with the kernel v3.13 low latency

I am a Linux guy with a 100% free Linux distro sponsored by the Free Software Foundation called Trisquel GNU/Linux (v7) 64-bits. It has the linux kernel v3.13 low latency and I wanted to update the ...
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55 views

Do active USB extensions cables cause delay(game controller)?

How much of an input delay would cause using 2 active 5m USB extension cables with an xbox 360 3m wired controller? Also, any risk of input not going trought? I'm kinda forced to this kinda of ...
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51 views
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13 views

Are there any established network quality classifications?

I'm finishing a program that sends a lot of data over TCP/IP. I'd like to test it with various quality networks to measure how well it works under different conditions. Are there any established ...
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60 views

how to replace “isolcpus=1-13” with “cgroup/csets” (for better latency)?

I've set isolcpus=1-13 in my tuned-adm custom profile: [root@localhost]# tuned-adm active Current active profile: myprofile [root@localhost]# cat /etc/tuned/myprofile/tuned.conf [main] ...
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30 views

Is latency from hardware interrupts a hardware, driver or kernel issue?

Being a power user I have spent countless hours tuning systems, checking DPC latency blah blah All of this begs the question why are we still dealing with these issues? I personally can't tell if ...
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97 views

High kernel latency ALL windows

I have been known about this site for a while. So I decided to register since most hardware and enthusiast forums well uhh you know, not worth it. Im a certified hardware tech and I noticed some ...
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2answers
236 views

Sporadic high latency on my home network

tl;dr My home network recently has been experiencing jumps from 27ms latency to 600ms. It doesn't happen always, and seems to occur frequently at night. What equipment should I buy and tests should I ...
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1answer
98 views

A low latency wireless network for 200+ users? [closed]

I'm developing a mobile application with realtime voice communication between two device in the same local wireless network. Our biggest challenge is to have a minimum latency during this conversation ...
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1answer
56 views

How to keep my ping/latency steady in cs 1.6?

I have broadband connection with 512 kbps speed. Sometimes I get 200 latency and sometimes 300. How can I keep that steady? It's really annoying.
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99 views

Best Latency between Hyderabad in India to Atlanta US

I would like to know what is the best latency I should expect between Hyderabad, India to Atlanta, US ? Currently I get a time=280ms when I ping my destination server in Atlanta, US. I want to ...
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1answer
45 views

Latency semantics of read registers on x86 ASM

Per A. Fog's instruction tables, an Ivy Bridge has a 3 cycle latency on a MOV instruction. So the following will take 3 cycles to move RAX into the address in RCX: mov [rcx], rax ...
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166 views

Audio Latency on Virtualbox Windows Guest on Linux Host

I am trying to run Cubase (music production system) inside a Virtualbox Windows Guest machine on a Linux Host. I have also installed the ASIO4All driver on the Windows Guest to reduce the latency. ...
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2answers
64 views

Assistance needed with high latency on a home network compared with office network with two connections from the same ISP?

I’m having trouble with my home network’s high latency and would be glad if someone can shed light on what is causing the issue. Could it be because of my router (Buffalo AirStation Nfiniti running ...
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0answers
206 views

Random internet drops on new Skylake build

I just finished my new Skylake build and I have random internet loss. While browsing the page sometimes get stuck, Facebook chat disconnects or downloads are quitting. However the internet icon on ...
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1answer
187 views

Why am I getting latency between my modem and my router?

I pay for a 15mbps down, 1mbps up DSL internet plan from TekSavvy Solutions (Canada). At least once or twice a week there will be moments where we get speeds much lower than advertised. When I notice ...
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1answer
149 views

D-Link DIR-850L QoS not working

Quality of Service is not working on my router. My seedbox (Xios) is set to the lowest priority and does not get throttled as it should when any of the higher priority devices require more bandwidth, ...
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0answers
99 views

How do I Introduce Latency to a Serial Port

I am looking for a way to introduce latency to a serial port. I am using a radio through a USB port and am looking to purposely delay the transmission by some amount of time (hopefully in an easily ...
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2answers
59 views

Networking fundamentals: Does a Gbps LAN has a better latency than a 100Mbps LAN?

I wil ask it in another way: If I want to transfer via LAN a rather big number (say 1.000) of rather small (say 10 bytes) files (total 10KB size), should I get better results in a 1Gbps LAN network ...
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14 views

Infiniband latency concerns

I got two hosts with Voltaire HCA500Ex-D (MT25408 ConnectX Mellanox) 10Gbit cards connected to a Cisco SFS7000d IB switch via CX4 3m cables. I'm really concerned about latency, which is higher than ...
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92 views

FFmpeg: Is there a method for displaying multiple live video sources in real time without lag/latency?

I'm playing around with a script that would take three live video inputs -- one instance of X11grab and two webcams -- and output them to separate XV windows: One output for each camera at 1280x720, ...
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2answers
3k views

Can I run games smoothly on a server via RDP? [closed]

Is it possible to run games on a hosted server smoothly via RDP? I have a dedicated server running Windows Server 2012 R2. It has 144 GB of RAM, an Intel Xeon E5 and GeForce GTX 750 Ti GPU. It's a ...
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1answer
48 views

Google Hangouts messages latency vs. typing alert

Using the Hangouts app, I consistently see that the ellipsis/dots disappear, and hence tell me the other user is done typing, several seconds before I actually see their message. This is not related ...
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1answer
465 views

Airport Extreme Base Station roaming network crazy ping times

I have two new AEBS' setup as a roaming network. One is in the basement (DHCP/NAT) and one in my office (ten feet away) in Bridged mode and is setup with identical SSID/PWD, etc. The issue is that I ...
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1answer
2k views

I sometimes get lag spikes causing ping times of 200 ms; might using different (e.g. Google's) DNS servers be better?

I live in the UK and I am a heavy gamer and I get lag spikes that take my ping to 200ms. Will using a third-party DNS Service, for example the one provided by Google, rather than those provided by my ...
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41 views

Why are packets piling up in my router? [duplicate]

I had been experiencing some latency spikes with my internet for about a day. After having an ISP tech come and confirm that there were no problems on their end, I tried pinging my router (Airport ...
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185 views

Very high write latency with Intel 530 180GB SSD and Ubuntu Server 15.04

I just put together a new "server" with an Intel NUC5i5MYHE, an Intel 530-series 180GB m.2 SSD, and 16GB RAM. I am having a rather severe problem with writes to the SSD having very high latency. The ...
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2answers
557 views

What might cause high latency when bandwidth is saturated?

I've been having network problems for a while and I'm trying to track down the source of the issue. Yesterday, I was transferring a file from my laptop to my desktop with SCP, over my wifi ...
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6k views

Does increasing upload or download speed reduce ping?

I have a 5 MB/s connection, but I always notice high ping when playing online games. When the network is stable (i.e. when pingtest.com reports the connection as 5 MB/s), the ping stays at 50 ms, but ...
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41 views

How to measure the latence time of each level of cache memory [closed]

I want to measure the size of each cache memory level (L1, L2, L3) and its latency time. I am using a C program that takes 3 parameters: the size of an arrays that will be read, the number of times to ...
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93 views

Are these device and network changes normal on a Chromebook?

The reason why I am asking is because I have been arbitrarily experiencing unusual amounts of latency when connecting to certain websites like https://cloud.google.com, Here is the "network_diag ...
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2answers
168 views

High latency, High CPU Interrupts per second 60K/Second causing FPS spikes in games

CPU Profiling Screenshot: LatencyMon Battlefield Screenshot: Processes: 1.3ms of execution time on the NVIDIA Windows Kernal?: I'm not familiar with the concept of Interrpts/sec, ...
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242 views

DPC Latency checker tool analog for Linux

I'm using my server for HFT trading. I like DPC Latency tool http://www.thesycon.de/deu/latency_check.shtml because it allows me to check that "everything allright". On the well-tuned Windows machine ...
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2answers
163 views

Testing network application with virtual network and artificial latency

In order to test a network application in a controlled manner I want to create some sort of virtual network on a single machine in which I can control latencies. (I am running Ubuntu 14.04 x64). I ...
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72 views

Should I change my notebook Wi-Fi card?

I saw a lot of topics about Wi-Fi, noisy, high round-trip time (RTT). I do made some troubleshootings and I conclude that maybe I need change my mini PCI Wi-Fi card. My OS is Windows 7 x64 and the ...
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1answer
153 views

Remote Support (Remote Desktop) Possible From Overseas?

bit of an unusual question here - I am a desktop support professional located in the US, whose clients are all in the US or Canada. Essentially my job entails taking remote control of PCs and ...
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0answers
37 views

Possibly a bufferbloat?

not very long ago ive noticed high latency and slowdown in responsiveness in my network. what is weird is it seems to only occur from 10 am to 10 pm (been this way for a week now). 10 pm onwards it ...
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2answers
427 views

understanding traceroute output to diagnose an issue with Verizon FIOS

Tech support has tried, and failed, to repeatedly fix anything, which makes me think the issues are deep within the Verizon network. But I'd like a quick sanity check, since I'm not very experienced ...
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78 views

Why do I get these latency spikes in games? How do I fix them?

http://pastebin.com/VkisYYMw Results of ping to a LoL server, results are similar to a Dota 2 server. As you can see, the ping flares up going as high as 500 to 600 ms at times. I have tried ...
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1answer
510 views

What's the theoretical latency of 802.11ac?

Inspired by this slide, I became curious to know the (theoretical) latency of the latest WiFi standard. However Google didn't help. This ppt's 8th slide, compares latency of 802.3 (3000 microsecs) ...
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1answer
222 views

How do I artificially increase the latency for a device in my network?

I want to test how ping would affect my gameplay on Call of Duty on PS4 and was wondering if there was a way to add about 100ms latency to my PS4's network connection?
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1answer
855 views

Routers with multiple user increasing latency by request is normal?

I guess my modem have a problem with multiples users sending packages simultaneously, in the past I shared my internet connection with others 4 devices (computers and smartphones) and I played online ...
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2answers
274 views

What is usable latency for ssh and RDP?

What is usable latency for ssh and Windows Remote Desktop Connection (RDP)? By usable, I mean for things like editing text through a text editor over ssh or RDP so that the latency wouldn't drive the ...
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1answer
730 views

How do I optimize Windows disk I/O for high-latency throughput?

Let's say there are 25 processes each which want to read and index a large (say, 1GB) file. The hard drive may be capable of ~100MB/sec throughput, but the head movement and rotational latency ...
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1answer
207 views

How to use OS X's terminal to ping an IP using the latency as a stopping condition for a loop?

What I'd like to do is to ping an IP while the latency is above an specific value. I think an example will help: Let's suppose I have the following result to the "ping *IP here*" command: PING *IP ...
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2answers
339 views

Ping my URL from a different location

Is there a way to someway mirror a ping request to an URL, to test it's speed from a different location? Say I'm in US and want to request a ping to my website coming from India and check the ...