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

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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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32 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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1answer
29 views

How latency (ping) reduction services work? [closed]

Services like "NoPing Tunnel" and "Tibia Tunnel" provides to it's costumers a software that makes the game client ran over a proxy tunnel instead of directly connect to the official game server. By ...
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2answers
44 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
2k 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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12 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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17 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
32 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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38 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
43 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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45 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
41 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
22 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
171 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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47 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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0answers
99 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
97 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
228 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
77 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
185 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
103 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
195 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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213 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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373 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
28 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
2k 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 ...
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1answer
580 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
67 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
56 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
198 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
222 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
289 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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341 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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405 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
1k 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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144 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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3answers
665 views

Why does latency increase when downloading or uploading?

I recently discovered that latency increases when a download or upload is in progress on my DSL line, sometimes quite drastically. Initially I thought there was a fault on the line but discovered the ...
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34 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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17 views

Options to increase network lattency [duplicate]

I need to permanently increase network latency in approximately 100ms, without losing packets. Reason: On a certain server and internet game my ping is too much lower than the other people playing ...
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1answer
171 views

What changes to my network settings in Windows 7 can I make to achieve lower latency for gaming?

What changes to my network settings in Windows 7 can I make to achieve lower latency for gaming? I have heard of changing TCP settings in the registry, but I have also heard conflicting information on ...
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0answers
854 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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1answer
436 views

Wireless Router - Losing Connection, Very Low Speeds - Cause?? Test Results

Looking for answers to an ongoing problem with wireless internet through Time Warner (TWC). There have been 5 technicians out and they can't figure it out. I found a link on this forum suggesting ...
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2answers
2k views

Simulating network latency for localhost connection on Windows 7

I need to simulate network latency to a program running on the local computer, connecting to a local service. Thus far I have tried dummynet (a windows build of ipfw) which I got working after some ...
0
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1answer
141 views

How much of a difference would it make if I switch out my current Corsair 1600MHz CL11 DDR3 for 2000MHz CL9? Especially for the game PlanetSIde 2

I recently bought two modules of 8G (16G total) Corsair Vengeance Series memory Specs: 1600MHz CL11 DDR3. System Specs: i7 4770K to 4.0GHz ASUS GTX 770 MSI Z87 ZMPOWER MAX During most of the ...
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3answers
4k views

Latency of CPU instructions on x86 and x64 processors

I'm looking for some table or something similar that could help me to calculate efficiency of assembly code. As I know bit shifting takes 1 CPU clock, but I really looking how much takes addition ...
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1answer
945 views

Determine which computer on LAN causes network problems

I have a simple question, is there any way to determine which computer on LAN is causing network problems? (virus on on of them maybe) Like 10 minutes of 30 minutes of playing online game my ping ...
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235 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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1answer
323 views

how to improve DPC Latency Checker times?

I'm using HP DL360p Gen8, 2 * E5-2640 and Windows Server 2008 R2 SP1. My friend is using HP DL160 Gen8, 2 * E5-2640 and Windows Server 2008 R2 SP1. We both made fresh Windows install, updated all ...
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189 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?