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--- magistraleinformaticanetworking:spm:spm1314phi [17/12/2013 alle 13:32 (12 anni fa)] – creata Marco Danelutto
+++ magistraleinformaticanetworking:spm:spm1314phi [17/12/2013 alle 13:57 (12 anni fa)] (versione attuale) – [Running from remote] Marco Danelutto
@@ Linea 2: / Linea 2: @@
 ===== Access =====
-The machine with the Xeon PHI cards may be accessed using the IP address <code>131.114.137.225</code> and the credentials distributed during the lessons to the attendind students.
+The machine with the Xeon PHI cards may be accessed using the IP address <code>131.114.137.225</code> and the credentials distributed during the lessons to the attending students.
 The credentials give access to a local account onto a Sandy Bridge multicore hosting the 2 PHI PCIe boards.
 In order to access the PHI, users should use an <code>ssh mic0</code> or <code>ssh mic1</code> command from the Sandy Bridge machine shell prompt.
+===== Set up environment =====
+Before using the Intel tools you should setup the shell enviornment in such a way you can find all the right tools. You should use a <code>source /opt/intel/composer_xe_2013.1.117/bin/compilervars.sh intel64</code> command to this purpose. It is a good practice to append the command at the end of your home **.bashrc** file.
+===== Compiling ======
+In order to produce executable programs for the PHI
+  - the **icc** compiler **must** be used to compile the source code on the Sandy Bridge host, and
+  - the **-mmic** flag should be specified
+As an example, to compile the **prog.cpp** source code for the PHI we should use a command such as <code>icc -mmic prog.cpp -o prog</code>
+===== Running ======
+To run a program on the Xeon PHI:
+  * copy the program exceutable to the PHI home <code>scp prog mic0:</code> (You can use either mic0 or mic1 on this machine)
+  * login to the PHI OS: <code>ssh mic0</code>(You should use the same **micXX** you used to copy)
+  * run the code: <code>./prog</code>and you'll see the results (**cout** writes) on the terminal
+  * go back to the compiler shell<code>exit</code>
+===== Running from remote =====
+To run a program on the PHI without leaving the Sandy Bridge shell, consider using a couple of commands:
+  * first copy the program executable with a <code>scp progname micX:</code>
+  * then run it from the current shell with a <code>ssh micX progname</code>
+You can consider writing a small shell/perl script to automatize the process.