RUSAGE(1B) BSD Compatibility Package Commands RUSAGE(1B)


rusage - print resource usage for a command


/usr/ucb/rusage command


The rusage command is similar to time(1). It runs the given command,
which must be specified; that is, command is not optional as it is in the
C shell's timing facility. When the command is complete, rusage displays
the real (wall clock), the system CPU, and the user CPU times which
elapsed during execution of the command, plus other fields in the rusage
structure, all on one long line. Times are reported in seconds and
hundredths of a second.


Example 1: The format of rusage output

The example below shows the format of rusage output.

example% rusage wc /usr/share/man/man1/csh (1)
3045 13423 78071 /usr/share/man/man1/csh (1)
2.26 real 0.80 user 0.36 sys 11 pf 38 pr 0 sw 11 rb 0 wb 16 vcx 37
icx 24 mx 0 ix 1230 id 9 is

Each of the fields identified corresponds to an element of the rusage
structure, as described in getrusage(3C), as follows:

real elapsed real time
user ru_utime user time used
sys ru_stime system time used
pf ru_majflt page faults requiring physical I/O
pr ru_minflt page faults not requiring physical I/O
sw ru_nswap swaps
rb ru_inblock block input operations
wb ru_oublock block output operations
vcx ru_nvcsw voluntary context switches
icx ru_nivcsw involuntary context switches
mx ru_maxrss maximum resident set size
ix ru_ixrss currently 0
id ru_idrss integral resident set size
is ru_isrss currently 0


csh(1), time(1), getrusage(3C), attributes(5)


When the command being timed is interrupted, the timing values displayed
may be inaccurate.

September 14, 1992 RUSAGE(1B)