Just Launched: You can now import projects and releases from Google Code onto SourceForge
We are excited to release new functionality to enable a 1-click import from Google Code onto the Allura platform on SourceForge. You can import tickets, wikis, source, releases, and more with a few simple steps. Read More
From: John Levon <movement@us...> - 2002-06-05 02:39:43
Update of /cvsroot/oprofile/oprofile-www
In directory usw-pr-cvs1:/tmp/cvs-serv17684
add some FAQs
RCS file: /cvsroot/oprofile/oprofile-www/ChangeLog,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -d -r1.11 -r1.12
--- ChangeLog 5 Jun 2002 02:26:00 -0000 1.11
+++ ChangeLog 5 Jun 2002 02:39:40 -0000 1.12
@@ -1,5 +1,9 @@
2002-06-05 John Levon <moz@...>
+ * faq.php3: add some FAQs
+2002-06-05 John Levon <moz@...>
* links.php3: added prospect
2002-05-26 John Levon <moz@...>
RCS file: /cvsroot/oprofile/oprofile-www/faq.php3,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -d -r1.5 -r1.6
--- faq.php3 6 May 2002 05:15:43 -0000 1.5
+++ faq.php3 5 Jun 2002 02:39:40 -0000 1.6
@@ -1,29 +1,73 @@
<?php require('start_page.php3'); start_page("faq.php3", "OProfile FAQ"); ?>
+<h3>Can OProfile profile the kernel too ?</h3>
+Yes, it profiles the kernel and all kernel modules by default. Pass
+the kernel vmlinux image to the post-profiling tools to get kernel
+profiles (or the module .o files).
<h3>Why do the profile tools fail to open the vmlinux kernel image ?</h3>
Probably because you have accidentally specified the vmlinu<em>z</em> not
vmlinu<em>x</em> file. If you don't have a vmlinux file you need to recompile your kernel from source.
+If you're not doing kernel profiling, you can provide any old binary instead.
+<h3>Can I get a summary of the whole system ?</h3>
<h3>Oprofile and laptops</h3>
-Users reported a few problem using Oprofile on laptops.
+Users have reported a few problems using OProfile on laptops.
-Some laptops do not have performance counter, in this case Oprofile
-fall back to RTC mode.
+Many laptops do not have performance counter hardware; in this case OProfile
+falls back to RTC mode (read the <a href="/doc.php3">documentation</a> for
-Users report than power management is not compatible with Oprofile
-on some laptops. Setting power management on in the BIOS is likely
-to hang your box.
+Users report that power management is not compatible with OProfile
+on some laptops. Enabling power management is likely
+to hang your box if you are using the performance counters.
+<h3>What sort of overhead does OProfile have ?</h3>
+It's dependent upon how you set up the counters, but it's typically
+lost in the noise (1-3%).
+<h3>Does OProfile support the Pentium IV yet ?</h3>
+Not yet. Currently nobody is working on this; if you want to see this,
+come and <a href="/contribute.php3">help out</a>.
+<h3>Does OProfile work on any other architectures yet ?</h3>
+Not yet. There are some rumbles about IA-64, x86-64, and Alpha
+ports, but nothing has happened yet.
<?php require('end_page.php3'); end_page("faq.php3"); ?>