[SOLVED] how to clear kernel counters

[vidya]

HI..

I want to clear kernel counters. i dont know how to do that,as i am new to linux.Is there any standard function in linux for clearing kernel counters? if so please tell me.

[Lakshmipathi]

Can you please explain more about it? .. Counters - do they refer to some kind of performance stuff?

[Rubberman]

As Lakshmitpathi asked, what do you mean by "kernel counters"?

[vidya]

Can you please explain more about it? .. Counters - do they refer to some kind of performance stuff?

hi..

I was analyzing a phy driver . In that they have cleared the kernel counters by calling some function . i dono whether it is standard function used for clearing the counters.

(void) fetch_stats(dev,NULL,1);
static int fetch_stats(struct atm_dev *dev,struct sonet_stats *arg,int zero)
{
struct sonet_stats tmp;
int error = 0;

sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
if (zero && !error) sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
return error ? -EFAULT : 0;

this is the function they are using to clear the counters. i just want to know what
basically this function do in kernel.

[vidya]

As Lakshmitpathi asked, what do you mean by "kernel counters"?

hi..

I was analyzing a phy driver . In that they have cleared the kernel counters by calling some function . i dono whether it is standard function used for clearing the counters.

(void) fetch_stats(dev,NULL,1);
static int fetch_stats(struct atm_dev *dev,struct sonet_stats *arg,int zero)
{
struct sonet_stats tmp;
int error = 0;

sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
if (zero && !error) sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
return error ? -EFAULT : 0;
}
this is the function they are using to clear the counters. i just want to know what
basically this function do in kernel.

[Lakshmipathi]

I don't have experience in device driver programming. I found this
LXR / The Linux Cross Reference

Hope this helps in your src code analysis.
ps: something like Doxygen tool might be helpful too.

HTH