sched_clock - microblaze

Michal Simek
2010-04-15T14:55:33Z

Hi Thomas and Steven,

I would like to improve time measuring for ftrace (Log below)

I looked at http://lkml.org/lkml/2009/11/16/181
where Thomas suggested to create sched_clock() function.
I used the same solution as Wu proposed but it is not nice.

Is unimplemented sched_clock the reason why ftrace not show fine grain time?

Or is there any other thing which is wrong?

Thanks,
Michal

Dumping ftrace buffer:
---------------------------------
0) ! 10000.00 us | }
0) <========== |
0) ! 10000.00 us | }
0) ! 10000.00 us | }
0) 0.000 us | get_seconds();
0) 0.000 us | tcp_rcv_rtt_update();
0) 0.000 us | tcp_ack();
0) 0.000 us | tcp_rcv_rtt_update();
0) 0.000 us | tcp_urg();
0) | tcp_data_queue() {
0) 0.000 us | __sk_mem_schedule();
0) 0.000 us | tcp_event_data_recv();
0) 0.000 us | sock_def_readable();
0) 0.000 us | }
0) 0.000 us | tcp_check_space();
0) | __tcp_ack_snd_check() {

--
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663