Re: KERNEL PROFILING

["Randy.Dunlap" <rddunlap@osdl.org>]

I don't know why it's not created.

What kernel version is this?  Did you build the kernel
or is it from someone else who could have modified it?

The only failure that I see in profile setup/init is Out of Memory
if the profile buffer cannot be allocated.  Did you search thru
the boot message log for any errors?

~Randy


On Tue, 08 Apr 2003 19:42:03 +0000 "shesha bhushan" <bhushan_vadulas@hotmail.com> wrote:

| 
| Hi
| If I use the command line option "profile=2" while booting the system, why 
| /proc/profile file is not created? Should I have to create it manually?
| 
| Thanking You'
| Shesha
| 
| 
| 
| 
| 
| >From: "Randy.Dunlap" <rddunlap@osdl.org>
| >To: "shesha bhushan" <bhushan_vadulas@hotmail.com>
| >CC: linux-kernel@vger.kernel.org, kernelnewbies@nl.linux.org
| >Subject: Re: KERNEL PROFILING
| >Date: Tue, 8 Apr 2003 08:01:55 -0700
| >
| >On Tue, 08 Apr 2003 07:58:54 +0000 "shesha bhushan" 
| ><bhushan_vadulas@hotmail.com> wrote:
| >
| >| HI ALL,
| >|   I am trying to profile the linux kernel. Can any one suggest an easy 
| >way
| >| to do. Like, I wanted to see how much TCP is using CPU, how much of CPU 
| >is
| >| used in memcpy, etc.
| >| Can any one please suggest me.
| >
| >Start with the file linux/Documentation/basic_profiling.txt
| >(it's in Linux 2.5.66-or-so or later).
| >
| >It explains how to use oprofile and readprofile.
| >
| >You can read about oprofile at http://oprofile.sourceforge.net/ .
| >
| >You can read about basic in-kernel profiling using /proc/profile
| >and readprofile via 'man readprofile'.  It's simple to use.
| >
| >--
| >~Randy