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Subject: Re: The need to unmake move

Author: Robert Hyatt

Date: 11:13:10 09/03/03

Go up one level in this thread


On September 03, 2003 at 14:08:13, Gian-Carlo Pascutto wrote:

>On September 03, 2003 at 14:06:50, Robert Hyatt wrote:
>
>>On September 03, 2003 at 13:35:36, Gian-Carlo Pascutto wrote:
>>
>>>On September 03, 2003 at 13:21:27, Robert Hyatt wrote:
>>>
>>>>I just set all the "helper" process "stop" flags to 1 and
>>>
>>>...and by doing so force a remote memory access.
>>>
>>>--
>>>GCP
>>
>>At most 6,000 times in a 1 minute search (from data posted elsewhere in
>>this thread.)  How much time does it take to do 6000 stores?  worst case
>>of 6000 microseconds?  6 milliseconds?  Out of one minute X N cpus.  Or
>>6ms out of N minutes?  I think that can be totally discounted without
>>introducing any significant error at all.
>
>Does this increase with more cpus? What kind of slope?
>
>--
>GCP


I don't have data beyond 4.  But for 1, there are no splits.  (  :)  ).  For
2 and 4, it appears to be near linear, but 2 and 4 are not enough data points.
I have some old Cray Blitz data that goes to 8 and 16 (I can post some here)
that suggests that this same "near-linear" number holds there.  However, CB
and Crafty don't work the same so comparing them is misleading.



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