Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




213 posts

Master Geek


#23613 4-Jul-2008 08:11
Send private message

Hi guys,

 

Just wondering if you could enlighten me. What does latency depend on? I`ve got pretty good line stats, I`m quite close to the exchange, but my PING results are around 130 ms consistently. At the moment I`m still with Xtra`s limited upstream plan, so could that be a reason? Or is this figure normal?

 

Cheers.





If honest work and justice are not enough - we'll get a lawyer.

View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
19282 posts

Uber Geek
Inactive user


  #142820 4-Jul-2008 08:16
Send private message

Distance national or internatincal route its taking. This can be seen by a tracert.

291 posts

Ultimate Geek


  #142822 4-Jul-2008 08:27
Send private message

Latency is a somewhat vague term.  Can you be more specific about your problem?

As a reference to your ping results, I get less than 20ms (average) pings to my default gateway (Telstra clear cable)

Unfortunately, I'm getting intermmitent "lag spikes" with ping results above 100, or even much higher, to the point of causing a complete time-out on the ping command.

This is killing my online gaming.





"There is no way to Peace -Peace is the Way" (A. J. Muste)

 


 
 
 
 




213 posts

Master Geek


  #142829 4-Jul-2008 08:52
Send private message

[URL=https://www.speedtest.net][IMG]https://www.speedtest.net/result/291720931.png[/IMG][/URL]

I`ve got no specific issues, though when I last played online, on a US server, I was experiencing a lot of lag.

But the reason I`m wondering about this now is that a lot of people seem to have much lower values, and I`d like to know if there`s anything I can do to improve my latency.




If honest work and justice are not enough - we'll get a lawyer.



213 posts

Master Geek


  #142832 4-Jul-2008 08:57
Send private message





If honest work and justice are not enough - we'll get a lawyer.

291 posts

Ultimate Geek


  #142835 4-Jul-2008 09:09
Send private message

Ok, looking at your speedtest results I notice your upload is very slow. I think lag is pretty much guaranteed with that sort of upload -especially on an american server, regardless of the high ping issue.

(I assume the server you are pinging to is the most optimal -you might want to try one or two others -for example I get the best results with Napier and then Auckland -Wellington (where I live) gives poor results)





"There is no way to Peace -Peace is the Way" (A. J. Muste)

 


220 posts

Master Geek

Trusted

  #142850 4-Jul-2008 09:54
Send private message

 

There are four sources of network delay: forwarding, queuing, propagation and serialisation.

 

Forwarding Delay

Forwarding delay is the amount of time that it takes to receive a packet, decide where to send it, and then start transmitting the packet. For modern routers this time is measured in 10-100μs.

If the packet has to be specially processed, for example, an encrypted packet or a firewall, the delay may rise to a few ms.

Forwarding delay is generally insignificant.

 

Queuing Delay

Queuing delay is the amount of time that a packet has to wait in a queue while other packets are being transmitted. It varies from 0, for an uncongested link, up to the sum of the amount of time to send the packets queued ahead of it. It is thus dependant on the serialisation delay.

Sometimes a router may elect to drop a packet rather than delay it too much.

Queuing delay is generally insignificant except when the link becomes congested, at which point it can rise to become the dominant source of delay.

 

Propagation Delay

Propagation delay is the amount of time it takes the signal to traverse a physical link. It is thus based on the speed of light.

The speed of light in optical fibre is about 65% of that in a vacuum; the speed of light in copper is about 75%. Nevertheless, fibre is generally preferred owing to its lower error rate and support for longer distances.

Propagation delay is insignificant for short links, but the dominant component for long links.

 

Serialisation Delay

Serialisation delay is the amount of time it takes to send the bits of a frame out of the interface. It depends on the number of bytes in the packet and the speed of the port.

Serialisation delay varies from a few μs, for high speed (Gbps) links, to hundreds of ms for slow links and large packets.

Some devices attempt to accumulate several packets and send them together in order to reduce errors, which effectively lengthens the frame size and increases the serialisation delay.

Serialisation delay tends to dominate at low speeds but becomes insignificant at high speeds.

 

Effect of devices

Cable Modems tend to add a few ms at most to the delay (serialisation delay is small on cable modems), but ADSL suffers from high serialisation delay coupled with error correction that can easily add 25ms of delay.

 




213 posts

Master Geek


  #142853 4-Jul-2008 09:59
Send private message

So after all, is there anything I can do on my side to improve my latency? A better modem or some sort of configuration settings?




If honest work and justice are not enough - we'll get a lawyer.

 
 
 
 


19282 posts

Uber Geek
Inactive user


  #142857 4-Jul-2008 10:03
Send private message

attilathegorilla: So after all, is there anything I can do on my side to improve my latency? A better modem or some sort of configuration settings?


Faster upload speed will help! a little bit



213 posts

Master Geek


  #142874 4-Jul-2008 10:25
Send private message

I`ve switched over to a FS/FS plan with Xnet, though they haven`t put me through yet, should be today or tomorrow. I`ll retest it then.




If honest work and justice are not enough - we'll get a lawyer.

220 posts

Master Geek

Trusted

  #142879 4-Jul-2008 10:35
Send private message

See if you can get interleaving turned off. That impacts latency (it's described under 'Serialisation delay' in my post. Interleaving is the 'accumulate a few packets and send them out together' bit).


Note that propagation delay to the USA (West coast) is a little over 100ms (round trip). Until we figure out how to increase the speed of light, this number is not going to get smaller.

220 posts

Master Geek

Trusted

  #142882 4-Jul-2008 10:42
Send private message

attilathegorilla: 

I`ve got no specific issues, though when I last played online, on a US server, I was experiencing a lot of lag.

But the reason I`m wondering about this now is that a lot of people seem to have much lower values, and I`d like to know if there`s anything I can do to improve my latency.

People in the US, playing on a US server, will always have a much lower PING, owing to not having to traverse 100ms+ (measured in lag, due to speed of light) of the Pacific Ocean. Are you saying that you have a much higher ping time that others in NZ, or are you just comparing to the others in the game?




213 posts

Master Geek


  #142909 4-Jul-2008 11:43
Send private message

michaeln:
attilathegorilla: 

I`ve got no specific issues, though when I last played online, on a US server, I was experiencing a lot of lag.

But the reason I`m wondering about this now is that a lot of people seem to have much lower values, and I`d like to know if there`s anything I can do to improve my latency.

People in the US, playing on a US server, will always have a much lower PING, owing to not having to traverse 100ms+ (measured in lag, due to speed of light) of the Pacific Ocean. Are you saying that you have a much higher ping time that others in NZ, or are you just comparing to the others in the game?




Naah I know I can`t expect to keep up with the locals on a US server, but just looking at my pin to the Auckland speedtest server, it`s 130 ms or more and others are posting values below 100, often much below.




If honest work and justice are not enough - we'll get a lawyer.

836 posts

Ultimate Geek

Trusted

  #142959 4-Jul-2008 13:56
Send private message

michaeln:

Propagation Delay

Propagation delay is the amount of time it takes the signal to traverse a physical link. It is thus based on the speed of light.

The speed of light in optical fibre is about 65% of that in a vacuum; the speed of light in copper is about 75%. Nevertheless, fibre is generally preferred owing to its lower error rate and support for longer distances.

Propagation delay is insignificant for short links, but the dominant component for long links.



Copper is not opaque so the speed of light is copper is not relevent - you are reffering to the speed of electromagnetic wave propogation outside a copper wire.

220 posts

Master Geek

Trusted

  #142963 4-Jul-2008 14:11
Send private message

Fraktul: 
Copper is not opaque so the speed of light is copper is not relevent - you are reffering to the speed of electromagnetic wave propogation outside a copper wire.
No, I'm referring to the speed of electromagnetic radiation propagation (c, familiarly the 'speed of light') through copper. I.e. 'light' in this case meaning photons, for which copper is anything but opaque, given the appropriate frequency of photon. Likewise, 'copper' in this context could encompass UTP, STP or various waveguides with a diverse range of dialectrics. The formula is no less relevant and for the copper based transmission media 'about 75%' is a perfectly fine approximation.

1286 posts

Uber Geek


  #142978 4-Jul-2008 15:21
Send private message

attilathegorilla:
Naah I know I can`t expect to keep up with the locals on a US server, but just looking at my pin to the Auckland speedtest server, it`s 130 ms or more and others are posting values below 100, often much below.

Speedtest pings mean as much as a politician's word; almost nothing.

You'd be better off pinging a server with the 'ping' command.




rm *


 1 | 2
View this topic in a long page with up to 500 replies per page Create new topic



Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Intel introduces 10th Gen Intel Core H-series for mobile devices
Posted 2-Apr-2020 21:09


COVID-19: new charitable initiative to fund remote monitoring for at-risk patients
Posted 2-Apr-2020 11:07


Huawei introduces the P40 Series of Android-based smartphones
Posted 31-Mar-2020 17:03


Samsung Galaxy Z Flip now available for pre-order in New Zealand
Posted 31-Mar-2020 16:39


New online learning platform for kids stuck at home during COVID-19 lockdown
Posted 26-Mar-2020 21:35


New 5G Nokia smartphone unveiled as portfolio expands
Posted 26-Mar-2020 17:11


D-Link ANZ launches wireless AC1200 4G LTE router
Posted 26-Mar-2020 16:32


Ring introduces two new video doorbells and new pre-roll technology
Posted 17-Mar-2020 16:59


OPPO uncovers flagship Find X2 Pro smartphone
Posted 17-Mar-2020 16:54


D-Link COVR-2202 mesh Wi-Fi system now protected by McAfee
Posted 17-Mar-2020 16:00


Spark Sport opens its platform up to all New Zealanders at no charge
Posted 17-Mar-2020 10:04


Spark launches 5G Starter Fund
Posted 8-Mar-2020 19:19


TRENDnet launches high-performance WiFi Mesh Router System
Posted 5-Mar-2020 08:48


Sony boosts full-frame lens line-up with introduction of FE 20mm F1.8 G large-aperture ultra-wide-angle prime Lens
Posted 5-Mar-2020 08:44


Vector and Spark teamed up on smart metering initiative
Posted 5-Mar-2020 08:42



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.