ping 127.0.0.1
Take note of the response times. See anything odd there? If your computer has been on for any length of time, and you've got an AMD Dual Core processor you might see some negative values. This indicates your computer has beaten the laws of time and space to get a reply before the request was sent!
Unfortunately that's not exactly the case. There is a problem with how software interacts with the processor timers. Here's a description from HP on the problem:
"This condition affects operations such as network communications and performance monitoring tasks that are sensitive to system time."Here's a link to fix the problem:
http://support.amd.com/us/Pages/dynamicDetails.aspx?ListID=c5cd2c08-1432-4756-aafa-4d9dc646342f&ItemID=153 (If that doesn't work go to AMD's support site and search for Dual Core Optimizer)
Here are a few posts with people having problems as a result of this processor issue:
- http://www.paessler.com/blog/2007/08/29/ipcheck-server-monitor/negative-ping-times-in-amd-dual-core-processors-solved/
- http://forums.pcper.com/showthread.php?t=430695
- http://wiki.ljackson.us/Negative_Ping_Time
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=446006&prodTypeId=15351&objectID=c01075682
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