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By default, oprofile tracks CPU usage of each process/function/whatever.
I’m trying to do some cache analysis now but I can’t get it to change
events. My setup command looks like this (trying different events):
sudo opcontrol --setup --no-vmlinux --separate=library
–event=L2_RQSTS:100000
–event=DATA_CACHE_MISSES:100000
–event=L2_RQSTS:7500:0x7:1:1
–event=LLC_MISSES:7500:0x7:1:1
as taken from a bunch of different online sources and man pages.
However, when I run the profile command:
sudo opcontrol --reset && sudo opcontrol --start && ./mycode.py && sudo
opcontrol --stop
I still always get CPU_CLK_UNHALTED events. My CPU type is “Core 2”. Any
suggestions? I’ve tried sticking the setup command after the --reset, to
no effect.
Thanks,
Dan
P.S. George and I were discussing setting up a Wiki page for general
OProfile stuff… it’s not exactly straightforward. Would anyone else
like to contribute?
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