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Changes between Version 7 and Version 8 of SessionInfo


Ignore:
Timestamp:
08/28/14 09:57:03 (6 years ago)
Author:
Antoine Martin
Comment:

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  • SessionInfo

    v7 v8  
    5050 * the server to receive it, process it and send the "echo" response
    5151 * the client to process the response and calculate the latency
    52  It is very different from an [http://en.wikipedia.org/wiki/Ping_(networking_utility) ICMP Ping] because it includes on both ends: the full operating system network stack, the operating system scheduler, the Python interpreter with its threads and locking, TCP re-transmits. On a busy system, this value may well go up as other packets are ahead of the send queue at either end. A modern CPU should be able to keep this value around 50ms plus the TCP connection latency (TCP packet drops can cause this value to increase more dramatically).
     52
     53  It is very different from an [http://en.wikipedia.org/wiki/Ping_(networking_utility) ICMP Ping] because it includes on both ends: the full operating system network stack, the operating system scheduler, the Python interpreter with its threads and locking, TCP re-transmits. On a busy system, this value may well go up as other packets are ahead of the send queue at either end. A modern CPU should be able to keep this value around 50ms plus the TCP connection latency (TCP packet drops can cause this value to increase more dramatically).
    5354
    5455You can see a screenshot [/attachment/wiki/SessionInfo/session-info-statistics.png here]