enum timer_source eal_timer_source = EAL_TIMER_HPET;
-/* The frequency of the RDTSC timer resolution */
-static uint64_t eal_tsc_resolution_hz = 0;
-
#ifdef RTE_LIBEAL_USE_HPET
#define DEV_HPET "/dev/hpet"
#endif
-
-void
-rte_delay_us(unsigned us)
-{
- const uint64_t start = rte_get_timer_cycles();
- const uint64_t ticks = (uint64_t)us * rte_get_timer_hz() / 1E6;
- while ((rte_get_timer_cycles() - start) < ticks)
- rte_pause();
-}
-
-uint64_t
-rte_get_tsc_hz(void)
-{
- return eal_tsc_resolution_hz;
-}
-
-
#ifdef RTE_LIBEAL_USE_HPET
/*
* Open and mmap /dev/hpet (high precision event timer) that will
fclose(stream);
}
-static int
-set_tsc_freq_from_clock(void)
+uint64_t
+get_tsc_freq(void)
{
#ifdef CLOCK_MONOTONIC_RAW
#define NS_PER_SEC 1E9
struct timespec sleeptime = {.tv_nsec = 5E8 }; /* 1/2 second */
struct timespec t_start, t_end;
+ uint64_t tsc_hz;
if (clock_gettime(CLOCK_MONOTONIC_RAW, &t_start) == 0) {
uint64_t ns, end, start = rte_rdtsc();
ns += (t_end.tv_nsec - t_start.tv_nsec);
double secs = (double)ns/NS_PER_SEC;
- eal_tsc_resolution_hz = (uint64_t)((end - start)/secs);
- return 0;
+ tsc_hz = (uint64_t)((end - start)/secs);
+ return tsc_hz;
}
#endif
- return -1;
-}
-
-static void
-set_tsc_freq_fallback(void)
-{
- RTE_LOG(WARNING, EAL, "WARNING: clock_gettime cannot use "
- "CLOCK_MONOTONIC_RAW and HPET is not available"
- " - clock timings may be less accurate.\n");
- /* assume that the sleep(1) will sleep for 1 second */
- uint64_t start = rte_rdtsc();
- sleep(1);
- eal_tsc_resolution_hz = rte_rdtsc() - start;
-}
-/*
- * This function measures the TSC frequency. It uses a variety of approaches.
- *
- * 1. If kernel provides CLOCK_MONOTONIC_RAW we use that to tune the TSC value
- * 2. If kernel does not provide that, and we have HPET support, tune using HPET
- * 3. Lastly, if neither of the above can be used, just sleep for 1 second and
- * tune off that, printing a warning about inaccuracy of timing
- */
-static void
-set_tsc_freq(void)
-{
- if (set_tsc_freq_from_clock() < 0)
- set_tsc_freq_fallback();
-
- RTE_LOG(INFO, EAL, "TSC frequency is ~%"PRIu64" KHz\n",
- eal_tsc_resolution_hz/1000);
+ return 0;
}
int