How to use

[jinyl777]

Hi， i am intersting to your work ,but i do the readme test zhe bench_make , i got:
Benchmark: Betweenness Centrality
loading data...
undirected graph
== 1000 vertices 29790 edges
== time: 0.0504179 sec

computing BC for all vertices...
cannot open perf event: type-0 config-cannot open perf event: type-0 config-00
cannot open perf event: type-0 config-1
cannot open perf event: type-0 config-4
cannot open perf event: type-0 config-5

cannot open perf event: type-0 config-1
cannot open perf event: type-0 config-4
cannot open perf event: type-0 config-5
cannot open perf event: type-cannot open perf event: type-3 config-03
config-0cannot open perf event: type-3 config-65536

cannot open perf event: type-3 config-65536
== finish
== time: 0.344001 sec
PERF_COUNT_HW_CPU_CYCLES ==> 0
PERF_COUNT_HW_INSTRUCTIONS ==> 0
PERF_COUNT_HW_BRANCH_INSTRUCTIONS ==> 0
PERF_COUNT_HW_BRANCH_MISSES ==> 0
PERF_COUNT_HW_CACHE_L1D_READ_ACCESS ==> 0
PERF_COUNT_HW_CACHE_L1D_READ_MISS ==> 0

can you help me to explanation why all zeros
where have quesations

[peilii]

Hi, I have encountered with the same problem. Any thoughts on how to solve it?