<html><head></head><body><div style="font-family:courier new, courier, monaco, monospace, sans-serif;font-size:13px;"><div>Dear Users,</div><div><br></div><div><font size="2">I have posted a couple of email about my problem in the past, while nobody response those. It may be true that my question is amateurish, but due to the fact that I am a beginner, I can not find the sufficient document for solving my problem. I am going to trace a C program that read from a file and show the <span style="color: rgb(0, 0, 0);">ratio of reads from page cache vs reads from disk. I read document of LTTng website, but I can not find appropriate explanation for this task. I just need a simple guidance to show me the right way for doing it. Could you please help me.</span></font></div><div><font size="2"><span style="color: rgb(0, 0, 0);"><br></span></font></div><div><font size="2"><span style="color: rgb(0, 0, 0);">Regards,</span></font></div><div>Mehdi.</div></div></body></html>