High Latency Issue

Hi,
So for the past 2 or so days I have had issues with very high latency. I have been getting a pretty much constant 300ms spiking commonly to about 400-500ms. Normally I am experiencing 31-60ms so this is a huge spike out of nowhere, I am pretty positive it is nothing inside of the house as we have not connected any new devices or moved the BT Hub 4 at all.
I have seen some users talking about something called Fast Path, although I do not know what this is if it helps resolve my latency issue then would it be possible to put me onto this.
Thank you in advance.

Here,
1. Product name:
BT Home Hub
2. Serial number:
+076270+NQ43132190
3. Firmware version:
Software version 4.7.5.1.83.8.130.1.17 (Type A) Last updated 31/10/14
4. Board version:
BT Hub 4A
5. ADSL uptime:
0 days, 01:19:41
6. Bandwidth:
448 / 4384
7. Data sent/received:
231.9 MB / 364.0 MB
8. Broadband username:
[email protected]
9. BT FON:
Yes
10. 2.4 GHz Wireless network/SSID:
BTHub4-FT6W
11. 2.4 GHz Wireless connections:
Enabled (802.11 b/g/n (Recommended)) 20 MHz, WPS enabled
12. 2.4 GHz Wireless security:
WPA and WPA2
13. 2.4 GHz Wireless channel:
Automatic / 6
14. 5 GHz Wireless network/SSID:
BTHub4-FT6W
15. 5 GHz Wireless connections:
Enabled (802.11 n 40 MHz (Recommended)) 20/40 MHz, WPS enabled
16. 5 GHz Wireless security:
WPA2
17. 5 GHz Wireless channel:
Automatic / 40
18. Firewall:
Default
19. MAC Address:
c8:91:f9:49:4b:ba
20. VPI/VCI:
0 / 38
21. Modulation:
G.992.1 Annex A
22. Latency type:
Interleaved
23. Software variant:
24. Boot loader:

Similar Messages

High latency issue of an evening whilst gaming.

Hiya`s Peeps, Having recently switched to BT from Virgin (this being only my third day as a customer) as the VM service for gaming in my area (Sth Manchester) on thier 50mb package was simply not viable due to over utilisation issues, I now find myself experiencing high latency issues with my BT service.
All three evenings have been lost to me as my in game latency (World of Warcraft) has rose upto 3500ms with occasional disconnections.
Also strange was that was after the BB was first switched on I had a consistent in-game latency of 24ms home and 24ms world, this lasted around 8 hours until I experienced my first lag spike, I was disconnected and when I eventually was able to get back in game, some 20 minutes or so later, my home and world latency had changed to 42/45 (still playable ) but every 10 to 15 minutes the world latency would again rise to around 3k and above and I would again be disconnected from the server.
I do apologise for the lack of any technical detail within this post as I simply do not understand such and struggle terribly with it, I am very happy with both my speed and ping tests, both being excellent in comparison to that that I would see when using the VM service.
What I am after I guess is advice from the community on how to get the best from BT bb for playing my online game, this connection is only used for World of Warcraft and very light reading on the www, I do not have a phone connected to this line and use no wireless connections with it at all, this PC (hard wired) is the only contraption connected.
Any help and advice will be greatly appreciated, Thankyou
Les

welcome to the forum
there is a 10 day training period after your connection is activated during which time you need to leave the router connected with no manual resets. The router may reset (often) during training but that is normal as the equipment in the exchnage tries to find the best stable connection for your line.
after the training period is complete and you have a stable connection then you can get the latency changed to 'fast' if yours latency is 'interleaved' changing to fast can make your line less stable than interleaved but it is the choice of gamers
If you like a post, or want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side of the post.
If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.

High latency issue When connected through Wifi

Hi
I have configured wlc 2504 with cisco 3600 ap .when i connected my laptop wlan on n range,i tried to ping with my network devices am getting high latency 130ms,150ms
Can anybody provide solution for this
by
Veeramani.G

Hi Veeramani,
There are actually a lot of different factors that can go into high latency type problems on your wireless deployment such as co-channel interference, interference from other wireless devices, and overall utilization on the AP/Channel. With that said, there are a number of questions that need to be answered:
1. Is this issue isolated to either the 802.11b/g 2.4Ghz, the 802.11a 5Ghz, or both bands?
2. While associated to the Access Point, in the Controller Web interface, navigate to Monitor > Access Points > 802.11a/n or 802.11b/g/n(pick the band your client is associated on) > Find the Access Point and scroll to the far right. Hover over the small blue box and select 'Detail'. Find the section labeled 'Load Statistics' and let me know what you see as the Channel Utilization percentage as well as the 'Attached Client Count'
3. Since you have a 3600, I am assuming you have CleanAir enabled on them. Navigate to Monitor > Cisco CleanAir, and see if you can pinpoint any noticeable interfering devices with high % Duty Cycle

Flash Media Live Encoder high latency

Hello,
we are trying to stream via Flash Media Live Encoder over a satellite connection (high latency of 1500 ms) and we get data rates no more of 500 kbps although there is available bandwidth to use. Is there any configuration parameter value to compensate the high latency issue. I searched in the knowlegdge db and I found that there were configuration settings for the TCP window size that were solved after the version 2.
Any ideas?
Thomas

No... FME does not have any facilities for negotiating with a
webservice or communicating with a browser. You can create an FME
profile xml document and distribute that (sort of like Justin.tv
does), but your users will need to apply that profile
manually.

Very high Latency and inconsistent download speeds

Hi all,
This is my first time on these forums and hopefully i can find some help for my horrible problem.
For the last 2-3 weeks my latency has consistently been 200+, i like to play online games alot and i cant with this latency. I have gone threw the whole drill of ringing BT and following there advice and i even had a BT engineer come out and he couldnt' find any problems. BT said they checked my line and couldn't find anything wrong, and the engineer didn't find any problems with the router (black).
I also have changed all of the wiring from the socket in the wall, which leads to the router, which leaders to a modem (i think its called that) that then connects me to the internet (Cable).
I am running out of patience as i spend alot of time on games such as Call of Duty and seeing my mates play it as i have 300+ ping is really annoying.
I Have noticed that the other computer my parents use also have the same high latency issue and they have tried it on cable and wireless with the same bad results. I have a program called xfire which shows my ping for all the servers on my list and there all 200+ but sometimes when i test my speeds on speedtest.net it shows me with 50 ping i believe this is due to the large spikes that i get, when im on call of duty it constantly jumps around 100, 150, 200 and sometimes even 50.
Any advice would be greatly appreciated.
Josh.
Also im not very good with computers so if anyone would like any figures or whatever just point me to the website and ill try and get them for you.
http://www.speedtest.net/result/1133172089.png
This looks ok but on xfire all the servers are at 300+ and when i go ingame there just as high.

Test1 comprises of Best Effort Test: -provides background information.
Download Speed
2550 Kbps
0 Kbps
7150 Kbps
Max Achievable Speed
Download speedachieved during the test was - 2550 Kbps
For your connection, the acceptable range of speeds is 600-7150 Kbps.
Additional Information:
Your DSL Connection Rate :3680 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 3000 Kbps

Extremely slow and high latency all day.

DSL is running extremely slow during peak hours from 12 afternoon to 12 midnight. Lower than 50% of rated speed and high latency
I have been frustrated with this DSL Service for months now. I am considering contacting BBB to file a complaint and I am tired of dealing with customer service giving me the run around. Internet is a monopoly in my area therefore verizon feels it doesn't have to do anything to keep its customers when they provide crappy service. I am on waitlist for another internet service provider and it is going to take almost a year because of how bad the internet options are in the area and demand for better options. I even had to pay over 100 dollars to get a truck roll come to my house to fix any issues within the house and the internet has not gotten better. Atleast I feel I should get a refund or something.
Here is my speedtest result just now. http://www.speedtest.net/my-result/2899553407
It has been even slower at other times. http://www.speedtest.net/my-result/2893509440
Modem is Westell 6100 or something.
Transceiver Statistics
Transceiver Revision:
7.2.3.0
Vendor ID Code:
4
Line Mode:
G.DMT Mode
Data Path:
Interleaved
Transceiver Information
Downstream Path
Upstream Path
DSL Speed (Kbits/Sec)
3360
864
Margin (dB)
15.5
13.0
Line Attenuation (dB)
21.5
13.0
Transmit Power (dBm)
7.6
11.9
Giganews line info
news.giganews.com
traceroute to {edited for privacy}, 30 hops max, 60 byte packets
1 gw1-g-vlan201.dca.giganews.com (216.196.98.4) 0 ms 0 ms 0 ms
2 ash-bb1-link.telia.net (213.248.70.241) 0 ms 0 ms 0 ms
3 TenGigE0-2-0-0.GW1.IAD8.ALTER.NET (63.125.125.41) 3 ms GigabitEthernet2-0-0.GW8.IAD8.ALTER.NET (63.65.76.189) 3 ms TenGigE0-2-0-0.GW1.IAD8.ALTER.NET (63.125.125.41) 3 ms
4 P1-8-0-0.LSANCA-LCR-21.verizon-gni.net (130.81.151.237) 72 ms 72 ms 72 ms
5 P9-3.LSANCA-LCR-01.verizon-gni.net (130.81.193.123) 75 ms P8-0.LSANCA-DSL-44.verizon-gni.net (130.81.35.133) 75 ms 76 ms
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * Max number of unresponsive hops reached (firewall or filter?)
news-europe.giganews.com
traceroute to {edited for privacy}, 30 hops max, 60 byte packets
1 vl201.gw1.ams.giganews.com (216.196.110.3) 0 ms 0 ms 0 ms
2 te7-8.ccr01.ams05.atlas.cogentco.com (149.11.104.17) 0 ms te7-7.ccr01.ams05.atlas.cogentco.com (149.11.104.9) 0 ms te7-8.ccr01.ams05.atlas.cogentco.com (149.11.104.17) 0 ms
3 te0-7-0-16.ccr21.ams03.atlas.cogentco.com (154.54.72.42) 0 ms 0 ms 0 ms
4 te0-3-0-0.ccr21.lon13.atlas.cogentco.com (130.117.48.141) 8 ms 8 ms te0-2-0-0.ccr21.lon13.atlas.cogentco.com (154.54.28.158) 8 ms
5 te0-7-0-4.ccr21.jfk02.atlas.cogentco.com (154.54.84.125) 90 ms te0-0-0-4.ccr21.jfk02.atlas.cogentco.com (154.54.84.129) 90 ms *
6 te0-3-0-6.ccr21.dca01.atlas.cogentco.com (154.54.41.5) 96 ms te0-0-0-2.ccr21.dca01.atlas.cogentco.com (154.54.25.238) 96 ms te0-2-0-7.ccr21.dca01.atlas.cogentco.com (154.54.41.1) 96 ms
7 be2042.ccr21.iad02.atlas.cogentco.com (154.54.26.126) 97 ms 97 ms 97 ms
8 uunet.iad01.atlas.cogentco.com (154.54.13.138) 99 ms verizon.iad01.atlas.cogentco.com (154.54.10.226) 105 ms 105 ms
9 P0-8-0-0.LSANCA-LCR-22.verizon-gni.net (130.81.29.127) 177 ms 178 ms P1-0-0-0.LSANCA-LCR-21.verizon-gni.net (130.81.199.39) 174 ms
10 P8-0.LSANCA-DSL-44.verizon-gni.net (130.81.35.133) 175 ms P9-3.LSANCA-LCR-02.verizon-gni.net (130.81.193.109) 187 ms 182 ms
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * Max number of unresponsive hops reached (firewall or filter?)
Here is what ICSI Netalyzer Results have stated.
Network Access Link Properties + –
Network performance (?): Latency: 580 ms, Loss: 15.5% –
The round-trip time (RTT) between your computer and our server is 580 ms, which is somewhat high. This may be due to a variety of factors, including distance between your computer and our server, a slow network link, or other network traffic.
We recorded a packet loss of 16%. This loss is very significant and will lead to serious performance problems. It could be due either to very high load on our servers due to a large number of visitors, or problems in your network. Of the packet loss, at least 14.0% of the packets appear to have been lost on the path from your computer to our servers.
TCP connection setup latency (?): 720ms –
The time it takes for your computer to set up a TCP connection with our server is 720 ms, which is quite high. This may be due to a variety of factors, including a significant distance between your computer and our server, a particularly slow or poor network link, or problems in your network.
Background measurement of network health (?): 3 transient outages, longest: 0.8 seconds –
During most of Netalyzr's execution, the client continuously measures the state of the network in the background, looking for short outages. During testing, the client observed 3 such outages. The longest outage lasted for 0.8 seconds. This suggests a general problem with the network where connectivity is intermittent. This loss might also cause some of Netalyzr's other tests to produce incorrect results.
Network bandwidth (?): Upload 700 Kbit/s, Download 2.3 Mbit/s +
Network buffer measurements (?): Uplink 5400 ms, Downlink 1200 ms –
We estimate your uplink as having 5400 ms of buffering. This is quite high, and you may experience substantial disruption to your network performance when performing interactive tasks such as web-surfing while simultaneously conducting large uploads. With such a buffer, real-time applications such as games or audio chat can work quite poorly when conducting large uploads at the same time.
We estimate your downlink as having 1200 ms of buffering. This is quite high, and you may experience substantial disruption to your network performance when performing interactive tasks such as web-surfing while simultaneously conducting large downloads. With such a buffer, real-time applications such as games or audio chat can work quite poorly when conducting large downloads at the same time.
HTTP Tests + –
Address-based HTTP proxy detection (?): OK +
Content-based HTTP proxy detection (?): OK +
HTTP proxy detection via malformed requests (?): OK +
Filetype-based filtering (?): OK +
HTTP caching behavior (?): OK +
JavaScript-based tests (?): OK +
DNS Tests + –
Restricted domain DNS lookup (?): OK +
Unrestricted domain DNS lookup (?): OK +
DNS resolver address (?): OK +
DNS resolver properties (?): Lookup latency 520 ms +
Direct probing of DNS resolvers (?): +
DNS glue policy (?): OK +
DNS resolver port randomization (?): OK +
DNS lookups of popular domains (?): OK +
DNS external proxy (?): OK +
DNS results wildcarding (?): Warning –
Your ISP's DNS server returns IP addresses even for domain names which should not resolve. Instead of an error, the DNS server returns an address of 199.101.28.20, which resolves to search.dnsassist.verizon.net. You can inspect the resulting HTML content here.
There are several possible explanations for this behavior. The most likely cause is that the ISP is attempting to profit from customer's typos by presenting advertisements in response to bad requests, but it could also be due to an error or misconfiguration in the DNS server.
The big problem with this behavior is that it can potentially break any network application which relies on DNS properly returning an error when a name does not exist.
The following lists your DNS server's behavior in more detail.
Please help. I am so frustrated I literally have fights with my family over internet problems. I am right now looking for other options and even starting to think about paying over 100 a month for dedicated line or T1 if they can service my area.

Not a single response from Verizon on this? And after you posted the tests & information they will need? I think I may have to make a service choice soon. Its bad enough Verizon can't post a simple email address for our support, they have removed Usenet access, removed access to our websites (I use HTML so their sitebuilder is useless)... Sheeshe...

Why does my 10GB iSCSI setup seem see such high latency and how can I fix it?

I have a iscsi server setup with the following configuration
Dell R510
Perc H700 Raid controller
Windows Server 2012 R2
Intel Ethernet X520 10Gb
12 near line SAS drives
I have tried both Starwind and the built in Server 2012 iscsi software but see similar results. I am currently running the latest version of starwinds free
iscsi server.
I have connected it to a HP 8212 10Gb port which is also connected via 10Gb to our vmware servers. I have a dedicated vlan just for iscsi and have enabled
jumbo frames on the vlan.
I frequently see very high latency on my iscsi storage. So much so that it can timeout or hang vmware. I am not sure why. I can run IOmeter and
get some pretty decent results.
I am trying to determine why I see such high latency 100'ms. It doesn't seem to always happen, but several times throughout the day, vmware is complaining
about the latency of the datastore. I have a 10Gb iscsi connection between the servers. I wouldn't expect the disks to be able to max that out. The highest I could see when running IO meter was around 5Gb. I also don't see much load
at all on the iscsi server when I see the high latency. It seems network related, but I am not sure what settings I could check. The 10Gb connect should be plenty as I said and it is no where near maxing that out.
Any thoughts about any configuration changes I could make to my vmware enviroment, network card settings or any ideas on where I can troubleshoot this. I
am not able to find what is causing it. I reference this document and for changes to my iscsi settings
http://en.community.dell.com/techcenter/extras/m/white_papers/20403565.aspx
Thank you for your time.

I have a iscsi server setup with the following configuration
Dell R510
Perc H700 Raid controller
Windows Server 2012 R2
Intel Ethernet X520 10Gb
12 near line SAS drives
I have tried both Starwind and the built in Server 2012 iscsi software but see similar results. I am currently running the latest version of starwinds free
iscsi server.
I have connected it to a HP 8212 10Gb port which is also connected via 10Gb to our vmware servers. I have a dedicated vlan just for iscsi and have enabled
jumbo frames on the vlan.
I frequently see very high latency on my iscsi storage. So much so that it can timeout or hang vmware. I am not sure why. I can run IOmeter and
get some pretty decent results.
I am trying to determine why I see such high latency 100'ms. It doesn't seem to always happen, but several times throughout the day, vmware is complaining
about the latency of the datastore. I have a 10Gb iscsi connection between the servers. I wouldn't expect the disks to be able to max that out. The highest I could see when running IO meter was around 5Gb. I also don't see much load
at all on the iscsi server when I see the high latency. It seems network related, but I am not sure what settings I could check. The 10Gb connect should be plenty as I said and it is no where near maxing that out.
Any thoughts about any configuration changes I could make to my vmware enviroment, network card settings or any ideas on where I can troubleshoot this. I
am not able to find what is causing it. I reference this document and for changes to my iscsi settings
http://en.community.dell.com/techcenter/extras/m/white_papers/20403565.aspx
Thank you for your time.
If both StarWind and MSFT target show the same numbers I can guess it's network configuration issue. Anything higher then 30 ms is a nightmare :( Did you properly tune your network stacks? What numbers (x-put and latency) you get for raw TCP numbers (NTtcp
and Iperf are handy to show)?
StarWind VSAN [Virtual SAN] clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

Windows 7 and Networks with High Latency

We are currently trying to rollout Windows 7 on our network to replace XP but have encountered an issue whereby we have remote clients that access the network over high-latency satallite links (BGAN and Vocality/Satellite). The latency of the links (based
on ping results) can be 600ms for Vocality and 1-3s for BGANs.
The particular services that don't work are a full motion video solution using TVI Viewer 7.9.1 and Outlook 2003 or 2007. These work fine on Windows XP. Shares can be accessed but are significantly slower than XP and ping does respond fine.
Windows 7 is running on Panasonic Toughbook CF52 and CF74 and I've tested in with a vanilla install with no updates and not on the Domain (2008R2 native) to eliminate GPO interference and tried it with all MS updates as of about 2 months ago.
I've tried removing the extra services on the network card (Topology Discovery, ipv6 and QoS), updated to the latest NIC drivers from Panasonic and drivers from Intel themselves. Reduced the MTU to as low as 500 and increased the Frame size (I forget what
to but was following a guide for slow links).
I've successfully replicated the issue on out development system using a satallite simulator.
Windows 7 with Outlook and TVI work fine on our network when connected via the LAN, ADSL, 3G and WiFi.
I'm currently analysing Wireshark captures but they don't seem any different to the XP ones.
Any help would be much appreciated.

Hi,
I noticed that your issue just happened when you use satellite transmission connection.
The fact is that this kind of connection in Windows 7 use TCP protocol. Transmission Control Protocol ( TCP ) under ideal conditions can provide reliable data delivery, but it is inherent in the existence of a throughput bottleneck, with the emergence on
the long-distance WAN packet loss and latency increases, the bottleneck is becoming more prominent and serious. In satellite networks with high loss, effective throughput may be as low as 0.1% - 10% of available bandwidth.
However, FASP can be the solution.
FASP
http://asperasoft.com/technology/transport/fasp/#overview-464
This response contains a reference to a third party World Wide Web site. Microsoft is providing this information as a convenience to you. Microsoft does not control these sites and has not tested any software or information found on these sites; therefore,
Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. There are inherent dangers in the use of any software found on the Internet, and Microsoft cautions you to make sure that you
completely understand the risk before retrieving any software from the Internet.
Thanks for your understanding.

ISE 1.2.1 Complaining about High latency - can´t figure out why.

Hello!
my 2 node (16 core, 32 GB Ram, SAN) ISE installation on VMWARE is, complaining about High latency. I have about 250 Test clients connected, and the VMWARE guys can´t seem to find anything wrong. Is there anyway to get a more detailed test WHAT actually is causing this high latency? CPU´s are idling, ram is at 2% and disk I/O is almost not messurable.. but the software is still complaining. (the Dashboard shows latency at 100+ ms) I think this might be the external CA, againt which the client certificates are run. but I don´t know if I can test this theorie!
I have 2 Hardware Appliances coming, but I thought my Test enviroment should be more then enough to handel 250 clients.. I am abit concerned about the going live with 5000 clients in the future.. if it is already complaining with 250 active clients.
and yes, I will be splitting the tasks up between the 2 Physical Boxes (Profiling and such) and the 2 VM Boxes (Management) but at the moment, for 250 clients the 2 VM´s should be enough.

I have a couple of my customers complaining about this as well. I believe it is cosmetic and it is due to this bug CSCup97285
The suggested action for this alarm in ISE is:
Check if the system has sufficient resources, Check the actual amount of work on the system for example, no of authentications, profiler activity etc.., Add additional server to distribute the load
I have confirmed with both clients that the appropriate resources were allocated and reserved in VM. In addition, neither client is reporting any issues so this leads me to believe that it is just a cosmetic bug.
Thank you for rating helpful posts!

High latency with MSI 790XT-G45 under W7

I have decided myself to go for W7 one one of my rigs.I ve got some genuine disks of 32 and 64 and loaded W7 for testing purposes .
As my intention is to use the 790XT-G45 (considering it more W7 suited than my Platinum beeing newer more CPU support) tryed both W7 versions , but there is a problem.
Using the DPC high latency tool i get like 100 us under any W7 version with this 790XT-G45.The same board is ok latency wise under XP ,it hovers around 10-20 us when you re not doing anything serious with it .I have to remind that on this board i ve also had some issues with the big mouse cursor thing that seems to be related to motherboard latencyes.
In the past i ve used the K9A2 Platinum with W7 64 RC with the same video card and sound card that i use now on the 790XT-G45 ,but the latency was always 10-20 us.In fact trying again the Platinum gives me under W7 like 10-20 us.
I ve tryed disableing onboards ,removing the Creative and updating to latest BIOS version but no joy.The latency also adds some drag to the system i mean W7 windows don t look to snappy like it feels on Platinum.
So is this board compatible to W7 for real ?
What is so different between the 2 boards ,does the 790X have bigger latencyes than the 790 FX from the Platinum.One of the issues is that even if i would choose the Platinum CPU upgrade path closes.
I repeat i ve tested both boards with default W7 drivers and with vendors drivers and same thing.
Any user with 790XT-G45 encountering this under W7 ?
At first glance it s not a very big issue ,but i m very sure this 100 us get s me while playing to more and i really hate input lag and static on my sound.
Any ideas ?

Hi Guys,
I agree with Sm3K3R that a 70+ microsecond increase in average DPC latency will have an undesirable affect on some apps (games, real-time streaming, etc.). I also believe that what is good for XP will almost certainly not be good for Windows 7. Too much of the architecture has changed. Better drivers may help going forward. To me, the bigger question is why this mobo takes so much longer to run these routines than the K9A2.
I do not have any serious problems with the apps I run. Some of them may run better with a shorter average DPC latency. I have no way to tell with what I currently have to work with. Other bottlenecks may be in play. I was just responding to Sm3K3R's request for feedback. My power option is set to high performance and my base configuration has 41 processes running, including Diskeeper real-time defragmenter, Avira Antivirus, Logitech SetPoint, Process Lasso's process governor, PeerBlocker, and TaskDock. It also includes the Microsoft search functions and the sidebar with 2 gadgets running. Most of these processes run as services. I thought it was the search, sidebar, or one or more of the non-Microsoft products causing my base 100+ average latency indicated by the DPC high latency tool, so I ran LatencyMon to find out.
I ran it several times for 2 to 5 minutes at a time, starting when the system was idle. The Nvidia display and NT Kernel & System drivers always topped the list, with latencies from 50 to 114 microseconds. The display driver's routine also ran much more often than any thing else, followed, about 60% less often, by the NT Kernel & System driver. Thus these 2 drivers contribute the most to my average DPC latency. The other products listed above most often had 0 or less than 15 microsecond DPC latencies. Once I saw this, I did not bother to check my game configuration which does not have the search, sidebar, and the non-Microsoft products listed above in it.
During a Google search of this issue, I read that someone reduced their average Windows 7 DPC latency by 50 microseconds by turning off the HPET timer. I tried this and it did not work for me.
Looking forward to the results of Sm3K3R's further testing and feedback from others.

High Latency

Hi, when trying to connect to my work VPN from my girfriends house the connection is unusable, speaking to the girlfriend she is regulally thrown off her VPN connection whilst working from home. After a few traceroutes I noticed very high latency on the route between the home hub and VPN gateway:
Traceroute:
traceroute to ukc1-twvpn.oraclevpn.com (144.24.19.20), 60 hops max, 60 byte packets
1 BThomehub.home (192.168.1.254) 17.482 ms 17.154 ms 17.062 ms
2 217.32.142.201 (217.32.142.201) 22.871 ms 25.683 ms 25.596 ms
3 217.32.147.174 (217.32.147.174) 25.350 ms 25.930 ms 26.414 ms
4 212.140.206.90 (212.140.206.90) 30.361 ms 31.576 ms 32.324 ms
5 217.41.169.215 (217.41.169.215) 32.262 ms 32.884 ms 33.496 ms
6 217.41.169.109 (217.41.169.109) 34.581 ms 20.622 ms 21.236 ms
7 acc2-xe-2-0-3.sf.21cn-ipp.bt.net (109.159.255.223) 21.177 ms acc2-xe-0-2-1.sf.21cn-ipp.bt.net (109.159.251.213) 321.036 ms acc2-xe-0-3-1.sf.21cn-ipp.bt.net (109.159.251.237) 321.884 ms
8 core1-te0-4-0-2.ilford.ukcore.bt.net (109.159.251.129) 322.600 ms core1-te-0-13-0-12.ealing.ukcore.bt.net (109.159.251.169) 324.078 ms core2-te0-0-0-6.ealing.ukcore.bt.net (109.159.251.159) 325.564 ms
9 peer2-xe1-0-0.telehouse.ukcore.bt.net (109.159.254.104) 323.088 ms 194.72.31.159 (194.72.31.159) 324.616 ms 326.111 ms
10 t2c3-xe-2-1-2-0.uk-lon1.eu.bt.net (166.49.211.192) 329.071 ms t2c3-xe-0-1-1-0.uk-lon1.eu.bt.net (166.49.211.164) 329.642 ms t2c3-xe-1-1-3-0.uk-lon1.eu.bt.net (166.49.211.182) 327.789 ms
11 166-49-211-254.eu.bt.net (166.49.211.254) 326.511 ms 328.270 ms 67.958 ms
12 ae14-xcr1.lnd.cw.net (195.2.30.113) 68.455 ms 69.132 ms 105.162 ms
13 ae0-xcr2.lnd.cw.net (195.2.25.122) 103.959 ms 102.668 ms 101.729 ms
14 ae10-xcr1.bkl.cw.net (195.2.30.166) 105.256 ms 106.756 ms 105.887 ms
15 oracle-gw-bkl.cw.net (195.59.8.10) 109.243 ms 107.291 ms 108.281 ms
16 144.24.17.2 (144.24.17.2) 110.882 ms 111.875 ms 109.591 ms
17 * * *
18 * * *
19 * * *
Who can I get in touch with to help troubleshoot this issue? I have gone through all normal basic troubleshooting steps such as the ubiqutous reboots of all technology. Many thanks.
Chris.

Is that problem consistent? My ping/tracert is fine: also from Infinity connection. I can't check the VPN itself.
I see your route and mine are both pretty similar and indeed both go through 212.140.206.90
You seem to have very high pings even to the HomeHub. Normally that should show up as 1ms or less even with wireless.
Tracing route to ukc1-twvpn.oraclevpn.com [144.24.19.20]
over a maximum of 30 hops:
1 1 ms <1 ms <1 ms 192.168.1.254
2 6 ms 5 ms 5 ms 172.16.14.14
3 * * * Request timed out.
4 8 ms 8 ms 7 ms 213.120.158.173
5 13 ms 12 ms 12 ms 212.140.206.90
6 12 ms 11 ms 11 ms 217.41.169.219
7 12 ms 11 ms 11 ms 217.41.169.109
8 13 ms 30 ms 12 ms acc2-xe-1-3-0.sf.21cn-ipp.bt.net [109.159.251.203]
9 21 ms 23 ms 23 ms core2-te-0-13-0-10.ealing.ukcore.bt.net [109.159.251.179]
10 20 ms 20 ms 20 ms peer2-xe3-3-1.telehouse.ukcore.bt.net [109.159.254.227]
11 20 ms 20 ms 20 ms t2c3-xe-0-1-2-0.uk-lon1.eu.bt.net [166.49.211.166]
12 22 ms 22 ms 22 ms 166-49-211-254.eu.bt.net [166.49.211.254]
13 24 ms 24 ms 23 ms ae14-xcr1.lnd.cw.net [195.2.30.113]
14 19 ms 19 ms 19 ms ae0-xcr2.lnd.cw.net [195.2.25.122]
15 20 ms 17 ms 18 ms ae10-xcr1.bkl.cw.net [195.2.30.166]
16 24 ms 23 ms 22 ms oracle-gw-bkl.cw.net [195.59.8.10]
17 21 ms 21 ms 20 ms 144.24.17.2
18 20 ms 20 ms 20 ms ukc1-twvpn.oraclevpn.com [144.24.19.20]

VLC audio problems on T400 - DPC Latency Issue?

Hi Folks,
When I try to use VLC player to play any video on my T400, I get audio stutters and other strange effects. I'm wondering if it might have to do with all the audio DPC Latency issues this model has had. Does anyone else have these issues? Windows media player seems to work just fine, by the way. DPC Latency is high when either program is playing, but remains high when VLC has paused playback (whereas windows media player doesn't induce high DPC Latency when paused).
I've tried tweaking the buffer of VLC player, and a million other things, but nothing seems to help. Hence my suspicion of DPC Latency issues.
Thanks,
Allie
2764-CTO, Win XP Pro SP3, 2.8 GHz Dual Core, 3 GB Ram, 320 GB HDD, ATI Radeon 3450 w/ 256 MB, all drivers updated

Just upgraded to Win 7, and the problem's gone. Must be an XP driver of some sort.

Hyper-V Guest - RDP Connections cause high latency.

Hi all,
In a test environment we have a HP ProLiant DL360p Gen8 server with Windows Server 2012 R2 - Standard installed with the Hyper-V Role and no others.
On the server there is a Switch Independent network team configured with 2 of the 1GB NICs.
There is a virtual Swtich (External) configured on the Host linked to the Team with allow management selected.
The Guest VM has a single NIC (not a legacy setup) connected to the virtual Switch
The issue we are having is that once an RDP session is connected to a Guest OS, for example another 2012 R2 Server, it experiences high latency (which makes the RDP session appear to run in a very jerky way)
Using Hyper-V VMConnect, the server has no issues at all although the window is smaller.
We can verify this is being caused by an RDP session by observing ping times:
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
Reply from 10.101.3.152: bytes=32 time=1ms TTL=127
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
Reply from 10.101.3.152: bytes=32 time=75ms TTL=127 <RDP SESSION STARTS>
Reply from 10.101.3.152: bytes=32 time=52ms TTL=127
Reply from 10.101.3.152: bytes=32 time=63ms TTL=127
Reply from 10.101.3.152: bytes=32 time=121ms TTL=127
Reply from 10.101.3.152: bytes=32 time=135ms TTL=127
Reply from 10.101.3.152: bytes=32 time=141ms TTL=127
Reply from 10.101.3.152: bytes=32 time=146ms TTL=127
......... Snipped ........
Reply from 10.101.3.152: bytes=32 time=119ms TTL=127
Reply from 10.101.3.152: bytes=32 time=2ms TTL=127
Reply from 10.101.3.152: bytes=32 time=8ms TTL=127
Reply from 10.101.3.152: bytes=32 time=14ms TTL=127
Reply from 10.101.3.152: bytes=32 time=22ms TTL=127
Reply from 10.101.3.152: bytes=32 time=72ms TTL=127
Reply from 10.101.3.152: bytes=32 time=75ms TTL=127
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127 <RDP SESSION CLOSES
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
Reply from 10.101.3.152: bytes=32 time<1ms TTL=127
This issue does not affect RDP sessions to the Host.
I have seen posts about disabling VMQ on the host/guest servers as there may be an issue with this model - this has had no effect at all, the issue persists after changing VMQ and restarting both the guest and the host OS.
I have seen another fix for a similar issue by running these commands: bcdedit.exe /set USEPLATFORMCLOCK on and this also has not resolved the issue.
I have also set the Guest VM to use 256Mbps minimum (512maximum - also tried with no maximum) bandwidth allocated, but again this does not resolve the issue.
There are no backup jobs or reporting jobs running on these servers (they are in test).
Is this caused by the specific hardware we have chosen or is there further diagnostics that can be performed? Any help would be appreciated.

Hi DalamarUK83,
"I have seen posts about disabling VMQ on the host/guest servers as there may be an issue with this model - this has had no effect at all, the issue persists after changing VMQ and restarting both the guest and the host OS."
Did you disable the feature in advanced settings of physical NICs ?
I would suggest to re-create virtual switch after disabling VMQ .
What is the make of that NIC ?
Best Regards
Elton Ji
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Extremely high latency from 4am - 12pm in Baltimore, MD

Lately for the past month I have been getting extremely high latency 1500ms+. I am directly wired to the Actiontec router using a new cable on a confirmed working lan card. I believe the problem maybe at the POD card. How would I go about proving to Verizon without going through numerous transfers of people that don't have a clue?

I had the same problem since Mid-June. Seems like it's anywhere in North Eastern United States. I myself is located about 20 Minutes from Washington DC. I get the latency right around 12~50 ms on first hop to Google or verizon.net on a good day with trace route test. The people in Verizon tells me that's normal but I don't buy that because my neighbor gets around less than 20 ms, never higher. It gets progressively bad around prime time and onward. Around 12 AM it can reach from 100~400 ms on latency to Google or verizon.net server.
I am a late night gamer and need that low latency badly. Seems like most of the people I have talk to from FSC (Fios solution Center) had no idea what is the difference between Bandwidth to Latency. They just call it "Speed". I have spoken with these people for almost every night for a month and a half, when I get a hint that they have no idea what they're talking about, I just hang up and call another one up or just request a supervisor to speak with.
Here is my trace route result, I have highlight the part that are unacceptable.
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
1    <1 ms    <1 ms    <1 ms Wireless_Broadband_Router.home [192.168.1.1]
2    61 ms    54 ms    23 ms L100.WASHDC-VFTTP-62.verizon-gni.net [96.231.212.1]
3    25 ms    15 ms    19 ms G11-3-662.WASHDC-LCR-06.verizon-gni.net [130.81.104.182]
4    36 ms    17 ms    33 ms so-4-2-0-0.RES-BB-RTR2.verizon-gni.net [130.81.28.146]
5    57 ms    65 ms    58 ms po1.ctn-border1.vzlink.com [206.46.225.85]
6    56 ms    67 ms    54 ms po121.ctn-core1.vzlink.com [206.46.225.18]
7    60 ms    71 ms    68 ms 206.46.228.130
8    76 ms   102 ms   141 ms 206.46.232.39
Trace complete
I'm going to list the things I have done so that perhaps if you are having the same issue, maybe you can anticipate or maybe save you time with this issue.
Replaced Router
This will be my 3rd Router in my possession. The odds of having 3 bad routers are astronomical but yet FSC will try to keep sending you more.
Replaced coax cable (twice), ONT, and splitter.
Once again, the problem still persist. To get these fix, I had total of 4 dispatchers. From the word of their mouth, they stated it's beyond their level and when it comes to latency the tech at verizon server will be the best people to help you.
Reset ONT by unplugging it for 5 minutes or more to pull up a new Gateway IP.
Appearently, someone were able to fix their latency issue this way but the results are mixed. Either it's a permanent fix or temporary fix or it made the problem even worse.
Optimizing connection/wired connections
I have a gaming PC, when they ask to clear the cache to solve my problem, it's an insult. Not only it's irralavent, in order for the computer to bog down because of cache overload, I must possess a computer that is less than of Pentium 2 back from 1995.
Anti-virus and FireWall
If these were actually the source of my problem then the high latency should be constantly bad.
Potentially hacked or other connection to your router.
While this problem can be an issue, I can see who uses the internet and even turned off the wireless. There's no way an uninvited person can slow down my connections.
The server that I am connecting to such as website and gaming server is not guaranteed by the verizon.
Yes, that is true but what are the odds of having google, verizon.net, altavista, gaming server from Steam, etc are having the latency issue all at the same time? It is as if they are blaming traffic problem on I-95 for having bad congestion on I-66. It's not relevant at all!
Verizon in-home Agent
Must I continue?
I will now list the solutions that others have found. Please keep in mind that these problems may not be relevant to you.
1) Bad PON card
Good luck convincing the verizon that this is the issue. For this to be the issue, people from your neighborhood must experience the same problem. Sadly, the problem is the latency and most people will be completely unaware of the problem as long as they are "online". There were cases where group of people resolved the problem but unfortunately the problem came back again the next day because the network tech at Verizon decided to switch them back to the old one.
2) Faulty hardware on rack
As far as I have been told, couple claimed that this has been the issue and was permitted to move their line into another rack.
3) Switching Gateway IP
One have claimed that certain Gateway IP they have been assigned are bad. For example, the house you're trying to drive away from has a huge pothole so you have to go around it by taking a detour.
4) Resetting the ONT by unplugging the battery
There has been claim that doing this for 5 mintues clears it up. What this actually does is it allows you to get a new Gateway IP and re-establish connections.
5) They blocked my IP
Yes, this can happen. I have been blocked once or more perhaps because sometimes I like to purchase and download games from Steam. When I do download, it does so for about an hour to 3 hours depending on the size of the game. Whilst this is going on, my room mate watches movie on Netflex and perhaps download music on the side. Also I watch On-Demand (requires internet). Also not to mention sometimes torrent and other P2P downloads. Check to see if you are blocked.
6) Last but not least, Verizon is purposely gimping our latency to squeeze budget.
There has been talks and speculations that since many primary account holders are not advance users. In otherwords, many would settle for just being "online". This supports the claims for having such a low standard for latency management in verizon. If so, Verizon must stop advertising their "fast" gaming gimmick that they display on their commercial.

High latency causing problems... and frustration w...

I have a femtocell that requires the latency on any single hop on the internet to be less than 240ms, any longer than this and it drops my phone call. On contacting the supplier of the femtocell, they asked me to use Traceroute to see how long the path to a server was (I used Google.com) and many of the hops were over 240ms, some as long as 4922ms.
On scanning this forum, there are other users out there (mostly gamers) who are suffering from latency problems. Has anyone had any success resolving the problem? I can send copies of the Traceroute outputs that clearly show high latency between routers with addresses such as interconnect2-gig1-0.manchester.fixed.bt.net, core2-pos0-6-1-0.ealing.ukcore.bt.net and core4te-0-7-0-0.telehouse.ukcore.bt.net, to anyone that may be able to help.
The best I've so far had from BT is that:
- It's a problem with the femtocell supplier: no, the supplier requested from ISPs their longest expected latency prior to releasing the femtocell and set the timeout to be equal to this
- It's a problem with my Mac mail: the fact that I use a Mac has absolutely nothing to do with network latency
- There's interference between my mobile phone and my wireless: this isn't the case (I'm a wireless communications engineer by background) and, if it was, almost no-one would be able to use mobile phones given the number of wireless access points in homes and offices.
Every time I get a call from the call centre it's someone different, who doesn't understand the problem, doesn't know what a femtocell is and hasn't read the notes which clearly state that I want to be called on my mobile, not on my home phone. It's looking like my best option may be to try to find another ISP who doesn't have this problem.

I think you have the result of what is maybe a 2 fold issue.
Femtocell technology is still a relatively new technology as you;ll know from your job.
If you think about the security issues of running a femtocell, that;s to say what it actually has to fulfil,
Security for femtocell networks spans several distinct requirements. The service provider must authenticate users as they arrive on the network. The RF link between the handset and the femtocell must be secured for both user and control plane traffic. And lastly, the mobile network traffic must be placed into a virtual private network as it traverses the wired ISP network to ensure that the traffic is protected while transiting this public network and only authorized users can forward traffic to the mobile operator's network.
There is however one very important element of femtocell security which makes the implementation significantly more complex. This relates to latency as you say, which must be carefully managed especially for applications such as VoIP/SIP. Compounding this challenge is the unknown nature of the latency across the ISP network, which has resulted in service providers requiring latency in the femtocell to be minimized, as you say.
If you add to that the fact that the BT broadband system is based on an algorithm packet handled system to ensure data quality across maybe noisy telephone lines, it all compounds to add to the problems of the running of the femtocell.
In other words if you have a highly error corrected and interleaved broadband line, it's not going to help the femtocell out by adding additional latency to what is already a fairly complicated situation where data handling is concerned....

High Latency Issue

Similar Messages

Maybe you are looking for