IntelÂ® Fortran Libraries Reference

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2 Intel Fortran Libraries Referenceierror(Output) INTEGER(4). The error status.If successful, ierror is set to zero; otherwise, an error code.The PXFTIME subroutine returns the number of seconds since Epoch (00:00:00 UTC, January 1,1970).CompatibilityCONSOLE STANDARD GRAPHICS QUICKWIN GRAPHICS WINDOWS DLL LIBExampleSee the example in “PXFTIMES”.PXFTIMESPOSIX Subroutine: Returns process times.Module: USE IFPOSIXSyntaxCALL PXFTIMES (jtms, itime, ierror)jtms(Output) INTEGER(4) on IA-32 processors; INTEGER(8) on Intel Itanium processors. A handleof structure tms.itime(Output) INTEGER(4) on IA-32 processors; INTEGER(8) on Intel Itanium processors. Thereturned time since system startup.ierror(Output) INTEGER(4). The error status.If successful, ierror is set to zero; otherwise, an error code.The PXFTIMES subroutine fills the fields of structure tms associated with handle jtms withcomponents of time that was spent by the current process. The structure fields are:• tms_utime – User CPU time• tms_stime – System CPU time• tms_cutime – User time of child process• tms_cstime – System time of child processAll members are measured in system clocks. The values can be converted to seconds by dividingby value ival returned from the following call:2-350
Descriptions of the Library Routines 2PXFSYSCONF(IPXFCONST('_SC_CLK_TCK'), ival, ierror)User time is the time charged for the execution of user instructions of the calling process. Systemtime is the time charged for execution by the system on behalf of the calling process.NOTE. To get a handle for an instance of the tms structure, usePXFSTRUCTCREATE with the string 'tms' for the structure name.CompatibilityCONSOLE STANDARD GRAPHICS QUICKWIN GRAPHICS WINDOWS DLL LIBSee Also: “PXFSTRUCTCREATE”, “PXFTIME”Exampleprogram test_unameuse ifposiximplicit noneinteger(jhandle_size) jtms1, jtms2integer(4) ierror,iinteger(4),parameter :: n=10000000integer(SIZEOF_CLOCK_T) itime,time1,time2, user_time1,user_time2integer(SIZEOF_CLOCK_T) system_time1,system_time2integer(4) clocks_per_sec, inamereal(8) s, PIreal(8) seconds_user, seconds_systemprint *,"Create a first instance for structure 'tms'"call PXFSTRUCTCREATE("tms",jtms1,ierror)if(ierror.NE.0) STOP 'Error: cannot create structure for handle jtms1'print *,"Create a second instance for structure 'tms'"call PXFSTRUCTCREATE("tms",jtms2,ierror)if(ierror.NE.0) thencall PXFSTRUCTFREE(jtms1,ierror)STOP 'Error: cannot create structure for handle jtms2'end ifprint *, 'Do some calculations'call PXFTIMES(jtms1, itime,ierror)if(ierror.NE.0) thencall PXFSTRUCTFREE(jtms1,ierror)2-351
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Overview of the Libraries 1This cha
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