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HOSTSYNC(3PVM) PVM Version 3.4 HOSTSYNC(3PVM) NAME pvm_hostsync - Get time-of-day clock from PVM host. SYNOPSIS C #include <sys/time.h> int info = pvm_hostsync( int host, struct timeval *clk, struct timeval *delta ) Fortran call pvmfhostsync( host, clksec, clkusec, deltasec, deltausec, info ) PARAMETERS host TID of host. clk (or clksec and clkusec) Returns time-of-day clock sample from host. delta (or deltasec and deltausec) Returns difference between local clock and remote host clock. DESCRIPTION pvm_hostsync samples the time-of day clock of a host in the virtual machine and returns both the clock value and the difference between local and re- mote clocks. To reduce the delta error due to message transit time, local clock samples are taken before and after reading the remote clock. Delta is the differ- ence between the mean local clocks and remote clock. Note that the delta time can be negative. The microseconds field is always normalized to 0..999999, while the sign of the seconds field gives the sign of the delta. For example: 3.25 Sec = 3,250000 0 = 0,0 -1 uSec = -1,999999 -1 Sec = -1,000000 -1.1 Sec = -2,999000 In C, if clk or delta is a null pointer, that parameter is not returned. ERRORS If pvm_hostsync is successful, it returns PvmOk. These error conditions can be returned by pvm_hostsync PvmSysErr pvmd not responding. PvmNoHost specified host not in virtual machine. PvmHostFail host is unreachable (and thus possibly failed) SEE ALSO pvm_config(3PVM) 20 February, 1994 HOSTSYNC(3PVM)
NAME | SYNOPSIS | PARAMETERS | DESCRIPTION | ERRORS | SEE ALSO
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