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Re: rdtscll and jiffies

Hi,
You can also use Kernel Function Trace (which uses tsc or jiffies to
measure time)
http://tree.celinuxforum.org/pubwiki/moin.cgi/KernelFunctionTrace
HTH

Regards,
Pradeep

On 7/1/06, Thomas Petazzoni <thomas.petazzoni@xxxxxxxx> wrote:
Hi,

Le Thu, 29 Jun 2006 11:52:16 -0700,
"Om Narasimhan" <om.turyx@xxxxxxxxx> a écrit :

> Then what might be the best way to measure the time taken by a
> function? Regards,

Maybe you can use OProfile, http://oprofile.sourceforge.net/

« OProfile is a system-wide profiler for Linux systems, capable of
profiling all running code at low overhead. OProfile is released under
the GNU GPL. »

From the FAQ:

« Can OProfile profile the kernel too ?

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). For example, opreport -l /boot/2.6.0/vmlinux »

Sincerly,

Thomas
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