摘要：
1 static uint64_t s[ 16 ] = { 2 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 3 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 4 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAU... 阅读全文
摘要：
在Linux下面测量程序的执行时间。采用一下办法。 1 #include 2 #include 3 4 uint64_t getusertime() { 5 6 struct rusage rusage; 7 getrusage( 0, &rusage ); 8 9 // transt it to microsecond(1 s =10^6 microsecond )返回的时间是微妙级别的10 return rusage.ru_utime.tv_sec * 1000000ULL + rusage.ru_utime.tv_usec;11 }首先来看 st... 阅读全文