|HOSTSYNC(3PVM)||PVM Version 3.4||HOSTSYNC(3PVM)|
pvm_hostsync - Get time-of-day clock from PVM host.
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 )
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 remote 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 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.
If pvm_hostsync is successful, it returns PvmOk. These error conditions can be returned by pvm_hostsync
|20 February, 1994|