/dev/kernprof: No such file or directory

["Shashidhar Mysore" <shashimc@xxxxxxxxx>]

Hi,

I'm a newbie to this group and kernprof. 

I am trying to use kernprof on linux 2.4.32. I successfully patched and compiled the kernel.

(except that I had to comment out the following lines from include/asm/kernprof.h

/* These are called by mcount() so we want them to be fast. */
void cg_record_arc(unsigned long, unsigned long) __attribute__((regparm(2)));
void record_fn_call(unsigned long, unsigned long) __attribute__((regparm(2)));

my compiler (gcc 3.4.6) was complaining about conflicting declarations for the two functions. Hope that is okay)

Okay, so I have a kernel which is patched with frame pointers, and kernel profiling enabled and boots fine. I now compiled the user space kernprof program, and mknod'ed the /dev/profile device.

The problem starts when I run kernprof and the program throws
"/dev/kernprof: No such file or directory" error. I tried doing the same with kernel module support (that is kernprof as a module, it did not work - lsmod said there is no module such as kernprof - probably because of depmod problem) and then I built kernprof as a built in tool (no module support). Neither of them worked - userspace kernprof throws the same error 

"/dev/kernprof: No such file or directory".

I double checked that I was running the right kernel with frame pointer and kernel profiling enabled, but just don't know what is wrong. Can somebody help me with this?

Thanks in advance,
-Shashi.