Re: lug-bg: Kakvo e jiffies time

[Nikolay Mitev <nikolaym@xxxxxxxxxxxxxxxxxxx>]

Здравейте,

Yavor Shahpasov wrote:

> Macha se da napisha edin script deto da pokazva uptime na opredelen 
> process
> za tselta cheta
> /proc/pid/stat, vav 22 element pishe che e vremeto ot boot vav jiffie, 
> vremeto ot boot go gepia on /proc/stat, no kakvo po diavolite e giffies
> pitah google no samo source ot kernel mi vadi, iavno e che search 
> engines ne sa mnogo umni, ili az ne pitam pravilno, dali pak jeeves ne 
> znae .
> Niakoi madar kernel haker moje li da pomogne.
Бе не съм нито мъдар, нито хакер, ама мисля, че мога да ти помогна.

/linux/kernel/itimer.c

/static void *jiffiestotv*(unsigned long *jiffies*, struct *timeval* **value*)
{
	*value*->*tv_usec* = (*jiffies* % *HZ*) * (1000000 / *HZ*);
	*value*->*tv_sec* = *jiffies* / *HZ*;
	return;
}

или по-простичко, секунди == jiffies / HZ

За i386 архитектури HZ == 100

linux/include/asm-i386/param.h:

#ifndef HZ
#define HZ 100
#endif


Use the source :-)

cheers,
face


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