[mpich-discuss] Clock synchronization

[James Dinan]

Hi Ravi?

Do you mean synchronization of the time of day on the machines?  If so, 
MPI doesn't synchronize the clock on each machine.  If you want to do 
this, you need a network time daemon or whatever equivalent there is for 
windows.  This is outside of the scope of MPI, but someone else may be 
able to suggest what you need.

Best,
  ~Jim.

On 4/1/11 11:28 PM, Ravi Prakash wrote:
> Hi,
>
> I'm a n00b and I'm wondering if there is any documentation on what clock
> synchronization algorithm MPICH2 uses. I need to trigger events at the
> same time across multiple machines. What accuracy am I looking at?
>
> My machines are Windows Vista boxes with Dual dual-core Xeons connected
> by an ethernet 100Mbps LAN. Please let me know if there are any more
> relevant factors needed for an approximate figure. Is it a few ms / 10's
> of ms / 100's of ms / god forbid seconds? :)
>
> Cheers
> Ravi
>
>
>
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