/** Get difference CPU cycles between event idx and event idx+1 on the same CPU.
* @param idx position of first event in tracebuffer
* @retval difference in CPU cycles
* @return 0 if something wrong, 1 if everything ok */
PUBLIC static
int
Jdb_tbuf::diff_tsc(Mword idx, Signed64 *delta)
{
Tb_entry *e = lookup(idx);
Tb_entry *e_prev;
if (!e)
return false;
do
{
e_prev = lookup(++idx);
if (!e_prev)
return false;
}
while (e->cpu() != e_prev->cpu());
*delta = e->tsc() - e_prev->tsc();
return true;
}
