unsigned int u, l;
__asm__ __volatile__("rdtsc" : "=a" (l), "=d" (u));
uint64_t timestamp = ((uint64_t)u << 32) | l;
lwt_record_t temp = { timestamp, format, value1, value2 };
unsigned int u, l;
__asm__ __volatile__("rdtsc" : "=a" (l), "=d" (u));
uint64_t timestamp = ((uint64_t)u << 32) | l;
lwt_record_t temp = { timestamp, format, value1, value2 };