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intel_asm
2016 May 11
0
Questions about CMT event statistic
...ool has different result.
I have a guest with cmt event enabled, start guest and get perf statistic every 1s:
# while true; do virsh domstats rhel7.2-1030 --perf; sleep 1; done
In the meanwhile, I use perf tool to get the llc_occupancy of qemu-kvm process:
# pidof qemu-kvm
16779
# perf stat -a -e intel_cqm/llc_occupancy/ -I 1000 -p 16779 sleep 100
And I compare the output of the above two commands, and find that they're so different:
The output of "virsh domstats" The output of "perf" tool
perf.cache=15753216 49152 Bytes
pe...