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I use emu-tools to monitor-performance and it is use normal. After the system breakdown, I reinstall the system and the perf is not support offcore any more. as shown below. So what problems may be I have encountered?
failed to read counter offcore_response_demand_code_rd_llc_miss_remote_dram
failed to read counter offcore_response_demand_rfo_llc_miss_remote_dram
failed to read counter offcore_response_demand_data_rd_llc_miss_remote_dram
# time core cpus counts unit events
0.100098644 S0-C0 1 <not supported> offcore_response_demand_code_rd_llc_miss_remote_dram
0.100098644 S0-C0 1 <not supported> offcore_response_demand_rfo_llc_miss_remote_dram
0.100098644 S0-C0 1 <not supported> offcore_response_demand_data_rd_llc_miss_remote_dram
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Likely your new kernel doesn't support your CPU (kernel too old)
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I have solved this problem.
I use pmt-tools to counts this events, and pmt-tools download event from https://download.01.org/perfmon/HSX/, the new updated version there is a problem. I back to the old version, and the problem solved.
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