Hi all,
Is anyone using oprofile?
I'm getting segfaults from opreport at the moment, and I'm not sure if
it is opreport, or just me.
In case it is something just plain daft I am doing, here is how it goes:
opcontrol --reset
opcontrol --setup --no-vmlinux
opcontrol --start
... now I run my program, /tmp/myprog ...
opcontrol --dump
opcontrol --shutdown
then I run,
opreport -l /tmp/myprog
and get:
warning: [vdso] (tgid:4780 range:0x8d7000-0x8d8000) could not be found.
warning: [vdso] (tgid:4784 range:0x860000-0x861000) could not be found.
CPU: Core Solo / Duo, speed 1067 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Unhalted clock cycles) with a unit
mask of 0x00 (Unhalted core cycles) count 100000
Segmentation fault
The problem seems to come when I ask for symbols (-l).
I can't seem to get much information out of other running programs either.
I'm running the opcontrol commands as root, and I've tried opreport as
root or myself.
I'm sure I have done this successfully in the past (but this is the
first time I have tried it in a while).
I have what should be a fully patched CentOS 5.5 here.
I see this: https://bugzilla.redhat.com/show_bug.cgi?id=529028 , but it
looks to be too old to be relevant (I notice I have the updated binutils
that the final link in the bugreport points to).
I've tried this on two different machines, but they are similar
configurations I guess in that they are both 32bit intel machines.
Hywel.
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