<div class="gmail_quote">2012/3/13 Xiangze Zeng <span dir="ltr"><<a href="mailto:zengshixiangze@163.com">zengshixiangze@163.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>After I configure PETSc using --with-precision=single, I can run both ex19 and my own code. Good news! But it seems lots of time is using for copping the data from CPU to GPU. </div><div></div></blockquote></div><br>
<div>How are you measuring? What preconditioner are you using and how many iterations are typically required?</div>