<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On May 30, 2012, at 4:40 PM, Jed Brown wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div class="gmail_quote">On Wed, May 30, 2012 at 9:37 AM, Hui Zhang <span dir="ltr"><<a href="mailto:mike.hui.zhang@hotmail.com" target="_blank">mike.hui.zhang@hotmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im"><blockquote type="cite"><p>How is the matrix assembled?</p></blockquote></div>In a deterministic way.<br></blockquote><div><br></div><div>Do you use ADD_VALUES with off-process entries? If so, the message order may be different. You can also add -vecscatter_reproduce to make VecScatter with ADD_VALUES process the messages in a static order instead of in the order they arrive (somewhat slower).</div></div></blockquote><div><br></div><div>Thanks for details. For the moment, it seems not necessary for me.</div><br><blockquote type="cite"><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote type="cite"><p>How different? </p></blockquote><div>Not very much. The last residual can vary in its trailing digits, e.g. from 6.5819e-7 to 6.5820e-7</div>
</blockquote></div><br><div>This looks fine.</div>
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