/** Get difference perfcnt cycles between event idx and event idx+1.
* @param idx position of first event in tracebuffer
* @param nr number of perfcounter (0=first, 1=second)
* @retval difference in perfcnt cycles
* @return 0 if something wrong, 1 if everything ok */
PUBLIC static
int
Jdb_tbuf::diff_pmc(Mword idx, Mword nr, Signed32 *delta)
{
Tb_entry *e = lookup(idx);
Tb_entry *e_prev = lookup(idx + 1);
if (!e || !e_prev)
return false;
switch (nr)
{
case 0: *delta = e->pmc1() - e_prev->pmc1(); break;
case 1: *delta = e->pmc2() - e_prev->pmc2(); break;
}
return true;
}
/** Return some information about log event.
* @param idx number of event to determine the info
* @retval number event number
* @retval tsc event value of CPU cycles
* @retval pmc event value of perf counter cycles
* @return 0 if something wrong, 1 if everything ok */
PUBLIC static
int
Jdb_tbuf::event(Mword idx, Mword *number, Unsigned32 *kclock,
Unsigned64 *tsc, Unsigned32 *pmc1, Unsigned32 *pmc2)
{
Tb_entry *e = lookup(idx);
if (!e)
return false;
*number = e->number();
if (kclock)
*kclock = e->kclock();
if (tsc)
*tsc = e->tsc();
if (pmc1)
*pmc1 = e->pmc1();
if (pmc2)
*pmc2 = e->pmc2();
return true;
}