- extern uint64_t flag_mask_;
- if (EXPECT_FALSE(flag_mask_ & (1 << (flag[0] - 'A')))) {
- LOCALIZE_THREAD_LOCAL(tb_, lwt_buffer_t *);
- unsigned int u, l;
- __asm__ __volatile__("rdtsc" : "=a" (l), "=d" (u));
- uint64_t timestamp = ((uint64_t)u << 32) | l;