I am running Linux 2.6.26 on an MPC8248 (which does not provide support to use the hardware performance counters ). HZ=250. Thus, I am getting samples every 4 ms.
I would like finer resolution. Can I use RTC mode with my 2.6 kernel? If so, how? When I try to force it, I get:
Eclipse # /usr/bin/opcontrol --event=RTC_INTERRUPTS:4096
You cannot specify any performance counter events
because OProfile is in timer mode.