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

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328 views

Experiencing lockups due remote system Hard drive being shut off

Whenever I open a homegroup folder on another computer on my network, and the remote harddrive has to spin up, windows explorer seems to lock up until the remote request completes. This affects ...
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1answer
892 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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11k views

How to fight network latency and jitter issues on Wifi?

I'm having problems with my Wifi connection. I did a test on PingTest.net with the following results: Packet Loss: 0% Ping: 103ms Jitter: 29ms Same test but from another machine on the network ...
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0answers
614 views

Windows 7 Lagging with multiple disks

I have an EVGA SR2 build with two Intel Xeon X5680, 48GB ram OCZ Reaper HPC Series at 1600 MHz running on Windows 7 x64 Proffesional. My bootable hard drive is an OCZ Vertex II 120GB and I have an ...
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427 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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314 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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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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933 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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590 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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1k views

Why would dropbox cause an increase in Latency

I am trying to figure out why Dropbox seems to be completely disturbing my internet connection and if others may be having the same problem. When Dropbox is idle, I ran a speed test. I get a ping to ...
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7 views

How to approach searching for sources of interface unresponsiveness

On Debian Linux: On a relatively powerful machine I ran an update and both the kernel and the window manager got updated to newer version. At that point the machine become noticeably less responsive: ...
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358 views

More latency using VLC than java browser plugin reading a video streaming

I am trying to see a video streaming in my PC from a mobile phone camera using Android and IP Webcam and I am able to do it but I have a problem with VLC. Runs correctly using VLC and java browser ...
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613 views

alsaloop: What happens on a buffer underrun?

I am tuning my sound interface latency with alsaloop -C hw:1,0 -P hw:1,0 -t $LATENCY_US When I set $LATENCY_US to 30000, I get around 20% CPU usage. I can restart this a few times and make some ...
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0answers
627 views

Chrome Experiencing High Latency and Low Download Speeds

In the last week, Chrome (latest version, 24.0.1312.57) on Windows 7 (64 bit) has severely deteriorated in download speeds and latency. Using speedtest.net, Chrome is currently receiving ~2.5mbps down ...
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165 views

Wi-Fi very slow except for when another computer uses it

We recently moved to a new home in a new state, with a new ISP. I'm a software guy, and I work from home frequently through the vpn, so I ordered the fastest connection they have. Everything works ...
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117 views

high latency on LAN

I have setup a LAN using mac airports and the nodes are macminis. The OS is Lion 10.7.3. the macport connect to the Internet using cable and the internal connection is wireless. I tried to ping each ...
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655 views

Calculating DRAM Timing Parameters from Latency

Let's say that we're looking at a DRAM with typical timing parameters (those of interest are listed below) with read and write latencies of ~20-50 nanoseconds. How would one go about changing the ...
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224 views

Is data transfer through a WPA2 protected ad-hoc network slower as compared to a unsecure one?

We play multiplayer LAN games on our laptops by creating wifi ad-hoc connection (sometimes protected to ensure no one other than whom we want to, joins in). Now my question is how much using a secure ...
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371 views

Confusing relation between RAM frequency and timings

I'm confused with relation between frequency and timing information when buying DDR3 RAM modules. I have OCZ DDR3 modules which should have 1600MHz frequency and CAS 7-7-7-20. If I use these modules ...
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906 views

Win7 -> Server 2008: Mapped drives take a long time to open

First, the configuration: I have a desktop and a laptop running Windows 7. I have a server running Windows Server 2008 Enterprise Edition. The workstation and server connect to the same Gigabit ...
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23 views

Benchmarking network latency

I am trying to measure the latency of sending a packet. I do this as follows. The client sends recorded time. The server receives the packet and gives the difference between the current time and the ...
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0answers
35 views

Super Slow (latency + speed) Wireless AP's, Suggestions?

Looking for some advice, we have: Router: Asus RT-N66U, 2.4ghz wireless is disabled 2 Engenius ECB350 Access Points configured on Channel 6, 20mhz HT mode, 1 on each floor (900 sq ft each) - both ...
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18 views

How to decrease gigabit ethernet network latency in Linux?

I have a cluster with Gigabit ethernet network. I don't need more bandwidth but the latency is important. ping shows that the latency between nodes are about 100 microseconds. Is there a way to have ...
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86 views

Does USB 3.0 implements transaction translator with USB 1.1 devices?

I have a USB 1.1 device (Full-speed device) which when plugged into a USB 2.0 hub, operates as hi-speed on the upstream ports of the hub, and I can write a message on the USB bus each 0.125ms. I am ...
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22 views

Any Tips To Remove Touchpad Delay? (Synaptics, HP Probook 455 G2)

I have an HP Probook 455 G2 laptop which I use occasionally. When using an external pointing device (i.e. MX Master via Bluetooth) I notice very little latency between moving the mouse and seeing ...
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25 views

How to add latency to TCP packets?

I have tried netem and wanem neither seem to be affecting the TCP packets. How can I add latency to TCP packets?
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73 views

Different latency on 2 different TV's

Im streaming games from my pc to my living room with a Raspberry and Moonlight. The thing is, when I play on a LG M2362D I have no latency. But when i play on a Philips 47PFK6589/12 I do have a ...
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37 views

what makes latency and ping high?

I'm geting high latency and ping so I'm wondering what does really makes ping and latency higher , and how to solve that, i made some research and that TcpAckFrequency and TCPNoDelay didnt seem to ...
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176 views

Why does Windows not need a low latency or real time kernel

All Linux distros have problems with latency when audio recording , gaming ,etc. But the Windows kernel can be used for audio recording , gaming or anything without a delay. Why does Windows not need ...
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28 views

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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132 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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32 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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132 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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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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130 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] include=...
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40 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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152 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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0answers
242 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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348 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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154 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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23 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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91 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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264 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 ...
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38 views

Why do I experience latency to certain IP's

This one has me stumped. I read a lot and ask very few questions. I usually have 2 or 3 SSH sessions at any given time. Monitoring applications, working on server configs that type of daily grind. ...
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0answers
394 views

What are the requirement for smooth voice chat with Skype?

In our country, Internet is very expensive. In comparison to that, I have a fair Internet connection. However, I experience choppy sound, lagging, etc. when making voice calls using Skype. I use a ...
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304 views

Maximum and Minimum Latency /Transfer time

how would i calculate the maximum and minimum latency and transfer time when I am only given that the hard drive rotates once each minute and each track has 10 sectors?
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683 views

Very high latency with Verizon DSL

At any time in a given day, my ping could be anywhere from 60ms (already too high) to over 1000ms. I've contacted Verizon support numerous times, but it doesn't seem anyone in the tech support center ...
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138 views

Comcast connection

I have had Comcast for about a month and up until Friday I havent had one complaint. As of Friday I started noticing massive lag while playing Tera, which is a MMO. I started up a ping -t www....
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203 views

Which RAM configuration for a desktop upgrade?

I am trying to increase the RAM of my home computer, but I am unsure as to how much each aspect of RAM should be weighted (as to which is more important). My motherboard has 6 slots, so I believe it ...
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466 views

Windows 7 Line In Delay Issue

I'm running Windows 7 Pro 32-bit on my Dell Latitude 2100 netbook and I'm having an issue with the line in device/driver/functionality. The device & driver are stock: Driver Date: 7/13/2009 ...