The latency tag has no wiki summary.
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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 ...
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23 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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1answer
76 views
How to solve extreme DPC latency peaks (240.000µs)
Once every few minutes I get a sudden peak of DPS latency that causes the system to "freeze" for a fraction of a second (240.000µs = 240ms).
The freeze is not only audio, also video, input devices, ...
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1answer
61 views
What is the best hardware for evaluating financial prices (FPGAs, GPUs or CPUs)? [closed]
I am going to write my own electronic trading platform for a university project. Hopefully hack out most of the network stack of the kernel and have simulated "real-time" prices being received on one ...
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45 views
How much latency does Hadoop typically introduce? [closed]
I plan to deploy 3 Hadoop nodes (2 quadcore CPU, 16GB RAM, 500GB HDD) loaded with data into HDFS. Each data line could be something like:
timestamp;count_of_current_sessions
My aim is to calculate ...
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0answers
79 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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1answer
42 views
Recording a video game on a P4… speed me up, Scotty?
I'm trying to record a d3d game, but I have HUGE lag issues. I'm on a p4 with an onboard 128mb 3d video card and 2 gigs of RAM. I'm trying to record quarter-size video with only 15 fps, but I'm ...
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71 views
Does waiting for new WIFI drivers from Intel is all one can do? [closed]
I bought my Dell E6420 with special WIFI card Intel Centrino Ultimate-N 6300 and maxed-out performance parameters to get high class performance in everything (i7 4 cores, 8gb ram and replaced HDD with ...
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0answers
48 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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69 views
Windows 7 computer experiences audio interruption every 1 minute
I am experiencing a strange issue on my Win 7 64bit machine where there is about a half second interruption to any audio source which occurs exactly every minute, suggesting maybe some service is ...
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2answers
124 views
High packet loss - all hops show red
I've run Ping Plotter and here are the results with high packet loss on all hops (around 12%). I find hard to believe Google's routers are faulty, is it my network card to blame?
Click the ...
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1answer
83 views
How much latency is introduced when the computer processes incoming network packets?
How much time does it take, from the time the data is received by the network card, until it is time stamped by the Linux kernel? Is it in microseconds? nanoseconds?
How I can improve this latency? ...
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3answers
238 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 ...
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1answer
98 views
Extreme Latency on Brand New CPU?
I've recently picked up a Coolermaster HAF with an ASUS p8p67pro motherboard equipped with 8 gigs of ram while running on Windows 7. This thing is hardly a month old, and yet it runs like an old dog ...
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3answers
146 views
Network latency measurement (Linux)
I'd like to measure network latency for SNMP GET request.
There is a free command line tool time which can be used to find timing statistics for various commands. For example it can be used with ...
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2answers
206 views
How to increase transfer speed on fat long pipe?
I have a log pipe between two facilities (gigiabit circuit with RTT latency of 17ms). When doing system-to-system file transfer (file sharing, rsync, ftp, sftp) I'm hitting maximum speed of approx 30 ...
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3answers
246 views
Windows 7 Network Mystery
I'm having serious connectivity issues in Windows 7 and I'm out of diagnostic ideas. Here's way too much detail:
Machine is about 6 months old, haven't had a problem up until yesterday.
Internet ...
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2answers
195 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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1answer
59 views
Powerful monitoring applications for Windows
I have been using the Windows 7 Resource Monitor lately which has proven very powerful.
One can see what disk latency any process produces and effectively disable it if not required. For example, I ...
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3answers
326 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 ...
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1answer
94 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 ...
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1answer
254 views
high latency pings to router
I am using a wireless network, wondering why when pinging the router I sometimes get high pings. shouldn't the time be <1ms all the time?
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213 views
How to reduce latency with openssh?
I'm ssh-ing to a server several thousands kilometers away, and every keystroke takes 500-800ms, so it is getting annoying.
Is it possible to have my ssh client cache each line I type locally and ...
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1answer
175 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 ...
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2answers
217 views
10 System LAN latency with ADSL modem as gateway
Recently I expanded LAN in my office from 3 to 10 computers.
Structure star topology, one ADSL Modem connected to One Switch which is again connected to 10 computers.
Also we have Wifi device ...
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307 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
...
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0answers
155 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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1answer
166 views
Network latency
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
140 views
Utility to tune network card to reduce latency to its absolute minimum?
I'd like to tune my network card to have the absolute minimum latency when pinging a remote server.
Is there a Windows utility that allows me to change things such as MTU, ACK time, buffer length, ...
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1answer
648 views
How does RAM frequency and latency differ? How does it affect performance?
I have a question regarding two specifications of RAM memory, the amount of Mhz and the latency timings (example: 9-9-9-24).
Which one of the two is most important for system performance and why? ...
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3answers
352 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)?
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2k 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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1answer
268 views
How to ssh in the face of huge (25 second) latency?
I need to create an ssh connection between two Linux machines running Centos v5 but the latency could be as high as 25 seconds. I find that if I test something approaching this configuration ...
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2answers
79 views
Is there a way to use a service to lower your latency?
There is this service wtfast that claims it can lower your ping in some games. Is this true? How it works?
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3answers
741 views
High DPC Latency and Slow Hard Pagefaults on Gigabyte GA-EP35C-DS3R Motherboard
I've owned a DIY-built PC on a Gigabyte GA-EP35C-DS3R motherboard for about 2 years now. When I first built this PC, it ran perfectly under Windows XP 32-bit. Performance was good, and I had no issues ...
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133 views
What configuration tweaks do I need to do to my Wifi base station to get minimum latency?
I am developing a specialized screen sharing solutions. The requirements call for it to: a. work over Wifi LAN network, b. provide minimum latency and jitter.
I did all I know how to do in the ...
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1answer
36 views
low-latency charting?
Need to deliver real-time charts (mostly bar and line charts) and wondering if a fast library can help.
I guess that C is mandatory for speed and I would favor frame-buffer drawing (rather than a ...
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56 views
How to reduce delay between forum posts in phpbb [closed]
In my phpbb forum, just after I post a reply to a thread, a page is shown and I've to wait around 5 secs to return back to the thread. How do I reduced the time to 0. (I tried setting the "Flood ...
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180 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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3answers
175 views
Data coming from the network is only partially transfered on Asus EEE 1001HA, Ubuntu 10.4 Lucid
My wife's netbook started behaving strangely lately. I dug around and found the following symptoms:
web browsing: painfully slow (keeps "loading" pages; it might show something like half the Google ...
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1answer
479 views
Firewire audio dropouts Dell Vostro 3500
This question is actually answered, I'm putting it up here since other people might be running into this and it's ultra annoying. Hardware/software involved:
RME Fireface 400 firewire audio ...
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2answers
246 views
Is it ok to mix CL4 memory with CL5?
I have 2 x 1GB on 800Mhz CL4 memory in my PC. I'm planning to upgrade to 6GB by adding a pair 2GB modules.
Is it ok if I buy CL5 modules or do I have to buy CL4?
2
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1answer
435 views
Low latency keyboards - are they for real?
Having just seen some commercial or other I just realized there could be such a thing as a high-latency keybard - as compared to a low-latency keyboard. If so then maybe a low-latency one could be yet ...
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3answers
72 views
Why would latency suddenly go up when crossing networks?
I'm looking at the latency from my machine to a world of warcraft server.
Every hop while I am in Comcast's network is sub 15ms.
Then it hits ATT and goes to 60-70MS for the rest.
Why would it ...
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3answers
2k views
Factors affecting network latency
I frequently maintain a constant connection with some private servers. I need to be connected with very little latency. The servers measure response time (*ping) in milliseconds.
What factors come ...
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6answers
1k views
(linux) tool to monitor “quality” of tcp connection?
I am looking for a tool to monitor the quality of a TCP connection. I am trying to describe what I mean:
It should be a tool with a client and a server part. The client sends, say, 1kB of data per ...
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1answer
966 views
wireless router - configuring for low-latency, high traffic environment
Hey all,
I have a few questions about configuring a router to achieve low-latency, high speed throughput on a local area network that is not connected to the internet. I've read up on some stuff, but ...
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5answers
1k views
How To Improve VOIP Sound Quality
PFSense 1.2.2
Cisco IP Phone 7940 (SIP Firmware - G711ulaw)
ADSL 6000/768
Asterisk
Hi Guys,
I'm having trouble maintaining stable outbound VOIP call quality from my home office. Inbound call ...
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2answers
803 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 ...
4
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1answer
427 views
Should the use of USB extension cables raise a concern about latency/performance?
Is there any need to be concerned about latency in transmission of any level of data/signal for USB devices when a USB extension cable is being used?
For this example lets say it's a 50cm cable (~1.6 ...
