Question:kernel profiling and readprofile

will fitzgerald (
Thu, 23 May 2002 14:21:40 +0100

hi all,

i stumbled accross a command called readprofile by accident and found
that by appening the line append="profile=2" to the lilo.conf file
and using thread profile command you can get statistics on functions
that spend a certain amount of time doing a job.

i done some searching on this and can't find anything other than a
man page on readprofile.

can anyone tell me what does the line append="profile=2" actually do
apart from creating the file profile in the proc directory, what is
the 2 for in this line?

next is this an accurate way to measure heady traffic load through
say a linux router? will it highlight all functions say for example
ip_forward, dev_queue_xmit etc etc that are being opverloaded due to
huge traffic loads being passed through the router. ie will it spot
bottlenecks with good accuracy?

any feedback is welcomed,
regards will.

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