<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"><base href="x-msg://211/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>Unfortunately, we haven't supported Windows since MPICH version 1.4.1p1. You can find out more at the FAQ page: <a href="http://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Q:_Why_can.27t_I_build_MPICH_on_Windows_anymore.3F">http://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Q:_Why_can.27t_I_build_MPICH_on_Windows_anymore.3F</a></div><div><br></div><div>Since we don't have any test environments or Windows experts, we can't really shed any light onto why you would get this performance. You might try MS-MPI as mentioned in the FAQ post.</div><div><br></div><div>Thanks,</div><div>Wesley</div></div><div><br><div><div>On Aug 19, 2013, at 12:44 PM, Abhishek Kumar Pandey <<a href="mailto:akpandey@adobe.com">akpandey@adobe.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="EN-IN" link="blue" vlink="purple" style="font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); background-color: white; background-position: initial initial; background-repeat: initial initial; ">Hi,</span><span lang="EN-US" style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; background-color: white; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; background-color: white; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); ">I am using mpich-1.4.1.p1 to launch multiple child processes. On Window Server 2008 all the child processes are launched almost immediately but this takes significant time on Window Server 2012. <o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; background-color: white; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; background-color: white; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); ">I am using MPI_Comm_spawn for spawning a process and MPI::Init_thread(argc,argv,MPI_THREAD_MULTIPLE) is used for initializing MPICH2.<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; background-color: white; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; background-color: white; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); ">Please let me know if this is a known problem. Is there any workaround ? <o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; background-color: white; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; background-color: white; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); ">Regards,<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; background-color: white; "><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(34, 34, 34); ">Abhishek <o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US"> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div></div>_______________________________________________<br>discuss mailing list <a href="mailto:discuss@mpich.org" style="color: purple; text-decoration: underline; ">discuss@mpich.org</a><br>To manage subscription options or unsubscribe:<br><a href="https://lists.mpich.org/mailman/listinfo/discuss" style="color: purple; text-decoration: underline; ">https://lists.mpich.org/mailman/listinfo/discuss</a></div></blockquote></div><br></div></body></html>