profiler(1M) UNIX System V(System Performance Analysis Utilities) profiler(1M)
NAME
profiler: prfld, prfstat, prfdc, prfsnap, prfpr - UNIX system profiler
SYNOPSIS
/usr/sbin/prfld [ system_namelist ]
/usr/sbin/prfstat on
/usr/sbin/prfstat off
/usr/sbin/prfdc file [ period [ off_hour ] ]
/usr/sbin/prfsnap file
/usr/sbin/prfpr file [ cutoff [ system_namelist ] ]
DESCRIPTION
prfld, prfstat, prfdc, prfsnap, and prfpr form a system of programs to
facilitate an activity study of the UNIX operating system.
prfld is used to initialize the recording mechanism in the system. It
generates a table containing the starting address of each system
subroutine as extracted from system_namelist.
prfstat is used to enable or disable the sampling mechanism. Profiler
overhead is less than 1% as calculated for 500 text addresses. prfstat
will also reveal the number of text addresses being measured.
prfdc and prfsnap perform the data collection function of the profiler by
copying the current value of all the text address counters to a file
where the data can be analyzed. prfdc will store the counters into file
every period minutes and will turn off at off_hour (valid values for
off_hour are 0-24). prfsnap collects data at the time of invocation
only, appending the counter values to file.
prfpr formats the data collected by prfdc or prfsnap. Each text address
is converted to the nearest text symbol (as found in system_namelist) and
is printed if the percent activity for that range is greater than cutoff.
FILES
/dev/prf interface to profile data and text addresses
/stand/unix
default for system namelist file
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