On Fri, 13 Jan 2006, Gerard Robin wrote: > And, what are exactly Elapsed Time and User+System Time ? > > If i run time ./dprof1.pl the outputs are: > > real 0m0.033s > user 0m0.011s > sys 0m0.002s > > If i run time ./dprof3.pl the outputs are: > > real 0m0.059s > user 0m0.018s > sys 0m0.004s > > What relation exists between the times of "time" an te times of dprofpp ?
The `times` manpage may help, as might `getrusage`: http://www.hmug.org/man/3/times.php http://www.hmug.org/man/2/getrusage.php http://publib16.boulder.ibm.com/pseries/en_US/libs/basetrf1/getrusage_64.htm The way that IBM version of the manpage is more oriented towards C programmers using the call, but the basic idea still gets through: This information is read from the calling process as well as from each completed child process for which the calling process executed a wait subroutine. tms_utime The CPU time used for executing instructions in the user space of the calling process tms_stime The CPU time used by the system on behalf of the calling process. tms_cutime The sum of the tms_utime and the tms_cutime values for all the child processes. tms_cstime The sum of the tms_stime and the tms_cstime values for all the child processes. Note: The system measures time by counting clock interrupts. The precision of the values reported by the times subroutine depends on the rate at which the clock interrupts occur. Helpful? -- Chris Devers DO NOT LEAVE IT IS NOT REAL -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
