<div dir="ltr">ISCreateGeneral just takes your indices and caches them. But it is a synch point. What ratio (max/min) is PETSc reporting in this data?<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jul 5, 2020 at 1:51 PM Y. Shidi <<a href="mailto:ys453@cam.ac.uk">ys453@cam.ac.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear developers,<br>
<br>
I am currently doing a weak scaling test, and find that<br>
the weak scaling results for ISCreateGeneral() is very bad.<br>
For 2, 4, 8 processors, the running times for completing <br>
ISCreateGeneral() are:<br>
0.687494, 3.00597 and 10.0613.<br>
I am not sure if this is normal.<br>
<br>
Thank you for your time.<br>
<br>
Kind Regards,<br>
Shidi<br>
</blockquote></div>