AMD dual core opetron optimization

[Andrew Haley]

kernel coder writes:
 > Main idea of this project is to read packets from gigabit ethernet
 > card and get the required information from packets in less than 200
 > cycles.The algorithem is so efficient that it will take less than 200
 > cycles if ideal envoirnment is provided.Ideal envoirnment also means
 > that once data is brought into cache ,then it remains into cache till
 > packet processing is complete.

OK.

 > I think root cause of sow many cycles might be the user space.As this
 > process is running in multitasking envoirment so there must always be
 > continuous process switching taking place .Timer interrupt must also
 > be disturbing the process.So i think in user space ,number of cycles
 > consumed must always be higher and inconsistent.What do you people
 > think ?

You need to loop around the code that you're measuring.  The overhead
of your test is so great that it swamps the thing you're testing.

Andrew.