HOSTSYNC(3PVM) PVM Version 3.4 HOSTSYNC(3PVM)NAMEpvm_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.
DESCRIPTIONpvm_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 remote clocks.
To reduce the delta error due to message transit time, local clock sam‐
ples are taken before and after reading the remote clock. Delta is the
difference 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 condi‐
tions 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 ALSOpvm_config(3PVM)
20 February, 1994 HOSTSYNC(3PVM)
