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

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tools for measuring one way delay in Mac OS X

I am looking for a tool to measure one way delay in Mac Os X. I have searched but havent found any thing. Can some one please suggest me any tool for this purpose.
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14 views

I can only upgrade one memory module, what should I choose?

I have a Samsung NP700Z3C laptop which comes with a 2GB 1600Mhz module and another 4GB module welded to the motherboard, I believe they are CL11. I'm thinking on buying a 8GB module to replace the ...
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1answer
24 views

How to determine causes of Latency to a game server?

My friend has a machine running several applications (apache, mysql and others). He is also running a game server on the same machine. I notice high latency when attempting to play on his server. ...
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1answer
27 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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76 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
56 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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13 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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27 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
51 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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13 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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46 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
172 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
29 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
123 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
1k 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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0answers
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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119 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
135 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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6answers
3k 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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24 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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51 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
76 views

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

CPU Profilling Screenshot: i.imgur.com/10ZJNN9.png LatencyMon i.imgur.com/KJbaS3p.png Battlefield Screenshot: i.imgur.com/chpYIjN.jpg Processes: i.imgur.com/wDOpxtq.png 1.3ms of execution time on ...
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117 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
94 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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63 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
79 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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26 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
275 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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58 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
250 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
148 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
440 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
152 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
374 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
149 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
256 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 ...
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275 views

Stuttering/Latencies when LAN/Ethernet Driver active

I experience heavy video/audio stuttering when playing a video or general latencies when downloading a file when connected via LAN/Ethernet NOT when connected via WLAN/Wifi. According to my ...
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562 views

What is a good WLAN ping time on a clean network?

More specifically, what is your local WLAN ping time (e.g., between a host on the WLAN and your router, or between two hosts on the WLAN, divided by 2)? I had assumed it would be well under 1 ms for ...
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1answer
29 views

Decreasing Latency on App Similar to high frequency trading

I have a bot on a server that accesses information from a website at a very specific time. I want to minimize the time that it takes for their website to get my request and be the first person in line ...
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1answer
4k views

Very high latency caused by router?

I'm getting very high pings (2000-10000ms), and intermittent internet connection when using a wireless router (be it on LAN or WAN). When connecting a desktop directly to the cable modem, there are no ...
2
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1answer
1k views

Improve and Reduce Latency in DD-WRT with QoS

I was tasked with making a home network today and after installing DD-WRT in one of the routers, I ran some diagnosis and the games became a problem. There is usually one or two people using Internet ...
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1answer
79 views

Best way to work over SSH (~250ms)

The server in question gives a pretty terrible latency of 250ms since it's on the other side of the globe. Now I'm supposed to develop software in that server, and as you'd guess, it's pretty ...
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1answer
77 views

Download speed and ping suffers during PC to PC file copy

Why does the ping and internet download speed suffer on PC#1 when files copied from PC#1 to PC#2? During file copy, my ping goes from 20ms to 600ms+, Download speed goes from 1.8MB/S to 250 KB/S give ...
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2answers
232 views

When buying RAM on a budget, do I choose higher capacity or lower latency?

I would like to know how much of a difference is attainable by using RAM with lower timings and whether that difference is justified by the price. Phrased differently, will lower latency RAM also have ...
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2answers
326 views

How to monitor changes in the frequency of network latency spikes over time?

I'm currently trying to troubleshoot an issue with my network in which I get latency spikes up to 200 seconds (normally around 50 secs) in an apparently random way at apparently random moments of the ...
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2answers
380 views

Internet lags for me, but not for my brother

Recently we had a new switch setup in our basement, plus my PC has the newest parts oldest dating 2012. When I play games that requires instant responding like Counter-Strike, League of Legends, FIFA ...
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383 views

How can I reduce latency on VLC

I 'm working on a video streaming application. Server is a Linux machine (ffmpeg-ffserver) and client is a Windows machine (vlc player). There is a latency of about 6 seconds. Despite the fact that ...
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556 views

How to reduce latency on FFmpeg video streaming?

On a video streaming application between Linux server (FFmpeg) and Windows client (VLC player), there is a noticeable latency of about 10 seconds. FFmpeg command: ffmpeg -re -f v4l2 -i /dev/video0 ...
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2answers
2k views

Why do Jumbo Frames hurt latency?

Recently I've been reading about jumbo frames and I got confused in a few places. As far as I understand there is a lower bound on the Ethernet frame size between 'store and forward' points (layer 2 ...
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208 views

I'm having DPC latency issues with my computer

The LatencyMon report will be added to the end of this. I recently got a modi and magni amp and dac combo and I've had audio stuttering issues. Here is a image of all my drivers I was told that I ...