相关疑难解决方法(0)

Linux内核:4.10.0-20-generic(也在4.11.3上试过)

Ubuntu:17.04

我一直试图使用收集内存访问的统计信息perf stat.我能够收集内存存储的统计信息,但内存加载的计数返回0值.

以下是内存存储的详细信息: -

perf stat -e cpu/mem-stores/u ./libquantum_base.arnab 100
N = 100, 37 qubits required
Random seed: 33
Measured 3277 (0.200012), fractional approximation is 1/5.
Odd denominator, trying to expand by 2.
Possible period is 10.
100 = 4 * 25

 Performance counter stats for './libquantum_base.arnab 100':

       158,115,510      cpu/mem-stores/u                                            

       0.559922797 seconds time elapsed

对于内存加载,我得到0计数,如下所示: -

perf stat -e cpu/mem-loads/u ./libquantum_base.arnab 100
N = 100, 37 qubits required
Random seed: …