Hello, everyone:
My platform is intel westmere (single socket) . The cpu is core i3. the OS
kernel is linux 2.6.31. However, I encounter the following errors when I run
the syst_smpl program,
the error is :
syst_smpl: can not attach the events PERF_COUNT_HW_CPU_CYCLES: invalid
parameters.
The task_smpl program is the same error as the syst_smpl.
The errors was occured at the call point of the function of
perf_event_open() in setup_cup()..
I found that the error occures due to the statement “fds[i].hw.watermark =
1;", The error disappeared
when the statement was commented.
I want to know the reason of the errors. Anyone can response me ?
However, the same version of libpfm4. I test it on another platform, which
is Quad-Core AMD Opteron(tm) Processor 2378. The OS is linux AS5(2.6.34).
libpfm4 works properly.
how about your suggestion?
Thanks in advance!
Jason
2011/2/22
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