On Graviton 3 the frequency is 1050000000 and the original function hp-timing.h no longer gives the correct answer. The following patch can fix the bug:

```
diff --git a/sysdeps/aarch64/hp-timing.h b/sysdeps/aarch64/hp-timing.h
index c8469e3011..c5a1204d2c 100644
--- a/sysdeps/aarch64/hp-timing.h
+++ b/sysdeps/aarch64/hp-timing.h
@@ -41,7 +41,7 @@ typedef uint64_t hp_timing_t;
#define HP_TIMING_DIFF(Diff, Start, End)                       \
({  hp_timing_t freq;                                          \
     __asm__ __volatile__ ("mrs %0, cntfrq_el0" : "=r" (freq)); \
-   (Diff) = ((End) - (Start)) * (UINT64_C(1000000000) / freq); \
+   (Diff) = (hp_timing_t)((End) - (Start)) * ((1000000000.0) / freq);  \
})
 #endif /* hp-timing.h */
```

I have also submitted a bug report with the proposed changes at -
https://sourceware.org/bugzilla/show_bug.cgi?id=29329

Regards,

Jun