GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 2.1AS(Slurm) |
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pvmfhostsync(3) |
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pvm_hostsync − Get time-of-day clock from PVM host.
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C |
#include <sys/time.h> |
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int info = pvm_hostsync( int host, struct timeval *clk, |
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struct timeval *delta ) | ||||
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Fortran |
call pvmfhostsync( host, clksec, clkusec, deltasec, deltausec, info ) |
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host |
TID of host. | ||
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clk |
(or clksec and clkusec) Returns time-of-day clock sample from host. | ||
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delta |
(or deltasec and deltausec) Returns difference between local clock and remote host clock. |
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
PvmSysErr
pvmd not responding.
PvmNoHost
specified host not in virtual machine.
PvmHostFail
host is unreachable (and thus possibly failed)
pvm_config(3PVM)
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pvmfhostsync(3) | |