prf man page on IRIX

prf man page on IRIX

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PRF(7)									PRF(7)

NAME
     prf - operating system profiler

DESCRIPTION
     The special file /dev/prf provides access to activity information in the
     operating system.	Writing the file loads the measurement facility with
     text addresses to be monitored.  Reading the file returns these addresses
     and a set of counters indicative of activity between adjacent text
     addresses.

     The recording mechanism is driven by a separate profiling clock.  The
     profiling clock period is set so that it does not become synchronized
     with the regular system clock.  Samples that catch the operating system
     are matched against the stored text addresses and increment corresponding
     counters for later processing.

     The file /dev/prf is a pseudo-device with no associated hardware.

FILES
     /dev/prf

SEE ALSO
     profiler(1M).

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