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

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2answers
112 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 ...
0
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1answer
23 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 ...
0
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2answers
46 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 ...
4
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2answers
552 views

SSH and Latent Connections (e.g., satellite connections)

Most of the week I live in the city where I have a typical broadband connection, but most weekends I'm out of town and only have access to a satellite connection. Trying to work over SSH on a ...
1
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2answers
680 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 ...
1
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0answers
486 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 ...
1
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2answers
81 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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0answers
39 views

Achieving very low network latency in Windows (<1ms)

I'm running windows server 2008 R2 on my server and I need to optimise my latency to a certain server, which is currently ~0.4ms (both servers are remote servers in the same datacenter). The server ...
0
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0answers
97 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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0answers
185 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 ...
1
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2answers
210 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 ...
0
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0answers
52 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 ...
3
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1answer
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 ...
0
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3answers
197 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 ...
13
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4answers
3k views

Negative ping time?

This is the first time I've seen this and I'm not sure what it means; 64 bytes from 74.125.93.99: icmp_seq=6233 ttl=53 time=545.493 ms 64 bytes from 74.125.93.99: icmp_seq=6234 ttl=53 time=776.093 ...
1
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0answers
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 ...
0
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0answers
31 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. ...
5
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2answers
2k views

Calculating hard disk block model reading time

My professor posted a slide on how to calculate the data retrieval from hard disk using the block model. The specs were: 7200 RPM 5ms SEEK 80MB/s TRANSFER RATE BLOCK MODEL : Block size 4KB I ...
8
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3answers
453 views

Xeon vs overclocked i7 Extreme for lowest latency

I am aware that the differences between high-end i7 and Xeon are: compatibility with dual socket motherboards, total L2/L3 cache size. overclocking capability. extra cores - Haswell ...
0
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0answers
83 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 ...
0
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0answers
79 views

VMware 5.1 Network drop

I am running a low latency demanding appliction on a VM in VSphere 5.1. The TCP/IP transfer rate is 124 MBit. I have an intermittent problem related to the network dropping and then slowly increasing ...
0
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2answers
1k views

DSL vs Cable latency

currently I have a 10Mbps DSL line and I'm thinking to switch to a cable since they got 100Mbps for a little less than double the price I'm paying for 10Mbps. In other words the cable company is ...
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2answers
2k views

Lowest Latency Sound Card

I'm using a sound card for reading analogue signals and for the ADC component. I need extremely low latency (<1ms). Is the sound card the right way to go or can you get better results with a custom ...
1
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0answers
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: ...
5
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1answer
10k views

VLC Caching levels

When I open the Preferences of VLC and go to Input & Codecs, I have a setting called Default Caching Level. I can choose between Cusom Lowest latency Low latency Normal High latency Higher ...
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3answers
2k views

Latency of WiFi router

My current gaming desktop is connected to router via few meters of class 5 UTP. But I have to move it to another room, and I'm reluctant to drill holes in the wall to get cables trough. Currently I ...
0
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1answer
261 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 ...
2
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1answer
159 views

How do I speak with my ISP about network issues [closed]

Bottom Line Star Wars the Old Republic is killing my network connection. I've sent traceroutes and ping results to my ISP but haven't managed to get the issue cleared up. I would like some help in ...
6
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3answers
832 views

Fixing bufferbloat in home network

In our home network, with continuous network IO happening latencies get ridiculous. It's fine with light loads but quickly becomes unusable if I'm, say, rsyncing a large number of small files, --other ...
0
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1answer
74 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 ...
3
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3answers
1k 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 ...
2
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3answers
975 views

Memory, more frequency, or more capacity?

My question my be simple, but I haven't been able to find an answer myself yet. If you had the choice of getting either 24 GB of ram at 1333 MHz, or 12 GB @ 1600 MHz, which would you choose? I know ...
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1answer
320 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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0answers
123 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 ...
0
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1answer
196 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 ...
1
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1answer
106 views

Vim write latency in tmux

I have noticed that, while using Vim in tmux over an SSH session, when I write a buffer to disk (i.e., :w) occasionally, while Vim says it's been written, the file remains unchanged. In fact, often ...
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0answers
88 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?
0
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3answers
324 views

What configuration tweaks do I need to do to my Wi-Fi base station to get minimum latency?

I am developing a specialized screen sharing solution. The requirements call for it to: Work over a Wi-Fi LAN network. provide minimum latency and jitter. I did all I know how to do on the ...
0
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0answers
229 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 ...
3
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1answer
497 views

Increasing value of sched_latency_ns and sched_min_granularity_ns

Why do I get an error message when I try to increase the values of these two parameters: #cat /proc/sys/kernel/sched_latency_ns 1000000000 #echo 2000000000 > /proc/sys/kernel/sched_latency_ns ...
7
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4answers
674 views

Does RAM timings with n-n-n-3n value perform better than anything else?

I want to ask something: Does RAM timings with n-n-n-3n (i.e. 8-8-8-24, 9-9-9-27, etc) perform better or is optimized more than the other who doesn't (i.e. 7-8-7-21, 9-9-9-24, etc)?
1
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0answers
163 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 ...
0
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1answer
210 views

Troubleshooting “bursty” network traffic

I've been having a problem with my Internet connection ever since moving to San Francisco, and it's driving me absolutely up the wall. After using my network connection for anywhere between five and ...
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0answers
2k 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 ...
2
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2answers
3k views

What's the minimum network latency for a 1000 km connection using optic fibers?

I know most of the network latency for short distances is due to router processing times. But for longer distances the speed of light also counts. And it's different from the speed the light in the ...
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2answers
1k views

Memory: trading off CAS latency versus speed

I am trying to upgrade my server's memory for a Dell precision 450 machine. The memory I have now (1GB in two 512 KB sticks) is DDR ECC PC2100 / CAS 2 / 266 MHz (Kingston KVR266x72c2). I want to get ...
1
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0answers
305 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 ...
4
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1answer
293 views

What can my ISP do? [closed]

I'm from India and customer service is extremely low priority in the agenda of companies here. I use an ADSL connection and I want to know what my ISP can do on their side to improve my latency for ...
6
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3answers
3k views

Debugging Linux I/O latency

I'm having some I/O problems on a couple of Linux systems that I administer. They manifest in that processes often block for up to several seconds in such simple syscalls as open(), unlink() or ...
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0answers
245 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 ...