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Bug #77620: No cycle timer implementation for AArch64 #21

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Bug #77620: No cycle timer implementation for AArch64 #21

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1 change: 1 addition & 0 deletions include/my_rdtsc.h
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Original file line number Diff line number Diff line change
Expand Up @@ -125,6 +125,7 @@ C_MODE_END
#define MY_TIMER_ROUTINE_MACH_ABSOLUTE_TIME 25
#define MY_TIMER_ROUTINE_GETSYSTEMTIMEASFILETIME 26
#define MY_TIMER_ROUTINE_ASM_SUNPRO_X86_64 27
#define MY_TIMER_ROUTINE_ASM_AARCH64 28

#endif

8 changes: 8 additions & 0 deletions mysys/my_rdtsc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -224,6 +224,12 @@ ulonglong my_timer_cycles(void)
clock_gettime(CLOCK_SGI_CYCLE, &tp);
return (ulonglong) tp.tv_sec * 1000000000 + (ulonglong) tp.tv_nsec;
}
#elif defined(__GNUC__) && defined(__aarch64__)
{
ulonglong result;
__asm __volatile__ ("mrs %[rt],cntvct_el0" : [rt] "=r" (result));
return result;
}
#elif defined(HAVE_SYS_TIMES_H) && defined(HAVE_GETHRTIME)
/* gethrtime may appear as either cycle or nanosecond counter */
return (ulonglong) gethrtime();
Expand Down Expand Up @@ -533,6 +539,8 @@ void my_timer_init(MY_TIMER_INFO *mti)
mti->cycles.routine= MY_TIMER_ROUTINE_ASM_GCC_SPARC32;
#elif defined(__sgi) && defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_SGI_CYCLE)
mti->cycles.routine= MY_TIMER_ROUTINE_SGI_CYCLE;
#elif defined(__GNUC__) && defined(__aarch64__)
mti->cycles.routine= MY_TIMER_ROUTINE_ASM_AARCH64;
#elif defined(HAVE_SYS_TIMES_H) && defined(HAVE_GETHRTIME)
mti->cycles.routine= MY_TIMER_ROUTINE_GETHRTIME;
#else
Expand Down