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<div class="moz-cite-prefix">Mario,<br>
<br>
Multi-threading comes in two flavours - opportunistic and
deterministic.<br>
<br>
Opportunistic is more efficient, but not exactly repeatable.<br>
<br>
The meaning of the parameter threads is -<br>
<br>
0 - off - running in serial mode<br>
n (1-reasonable) - opportunistic using n threads. With k cpus, I
would use k or maybe one more.<br>
n (101-) - deterministic using n-100 threads. With k cpus I would
use k or maybe up to 2*k as load balancing is worse.<br>
<br>
threads == 100 ! should be as 0, but somewhere a parallel flag has
been set and so things go wrong.<br>
<br>
Solution - don't use 100 - I will probably get round to treating
as 0.<br>
<br>
John Forrest <br>
On 29/12/14 16:36, Mario Souto wrote:<br>
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cite="mid:CAHXHNqT96MVWZL4U6_i791Ctt4OtrMuODU3LAq+BeMFTgmhBGQ@mail.gmail.com"
type="cite">
<div dir="ltr">Dear all,
<div><br>
</div>
<div>I am using the version 2.8.12 of Cbc and having some <span
style="font-size:12.8000001907349px">strange</span> problem
with the Multithreading feature. The following problem is
'proven infeasible' when using 100 threads. However, an
integer solution cab be found when only one thread is used.</div>
<div><br>
</div>
<div>Does any one have some idea about it?<br>
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<div style="font-size:12.8000001907349px"><span
style="font-size:12.8000001907349px">Thanks in advance,</span><br>
</div>
<div style="font-size:12.8000001907349px"><span
style="font-size:12.8000001907349px"><br>
</span></div>
<div style="font-size:12.8000001907349px"><span
style="font-size:12.8000001907349px">Mario Souto.</span></div>
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<br>
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