#include "hash.h"
#include "os/os.h"
-#if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC)
+#if defined(ARCH_HAVE_CPU_CLOCK)
+#ifndef ARCH_CPU_CLOCK_CYCLES_PER_USEC
static unsigned long cycles_per_usec;
static unsigned long inv_cycles_per_usec;
static uint64_t max_cycles_for_mult;
+#endif
+#ifdef ARCH_CPU_CLOCK_WRAPS
static unsigned long long cycles_start, cycles_wrap;
#endif
+#endif
int tsc_reliable = 0;
struct tv_valid {
#ifdef CONFIG_CLOCK_GETTIME
static int fill_clock_gettime(struct timespec *ts)
{
-#ifdef CONFIG_CLOCK_MONOTONIC
+#if defined(CONFIG_CLOCK_MONOTONIC_RAW)
+ return clock_gettime(CLOCK_MONOTONIC_RAW, ts);
+#elif defined(CONFIG_CLOCK_MONOTONIC)
return clock_gettime(CLOCK_MONOTONIC, ts);
#else
return clock_gettime(CLOCK_REALTIME, ts);
#endif
t = get_cpu_clock();
+#ifdef ARCH_CPU_CLOCK_WRAPS
if (t < cycles_start && !cycles_wrap)
cycles_wrap = 1;
else if (cycles_wrap && t >= cycles_start && !tv->warned) {
}
t -= cycles_start;
+#endif
tv->last_cycles = t;
tv->last_tv_valid = 1;
#ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC
struct timeval s, e;
uint64_t c_s, c_e;
enum fio_cs old_cs = fio_clock_source;
+ uint64_t elapsed;
#ifdef CONFIG_CLOCK_GETTIME
fio_clock_source = CS_CGETTIME;
c_s = get_cpu_clock();
do {
- uint64_t elapsed;
-
__fio_gettime(&e);
elapsed = utime_since(&s, &e);
} while (1);
fio_clock_source = old_cs;
- return (c_e - c_s + 127) >> 7;
+ return (c_e - c_s) / elapsed;
}
#define NR_TIME_ITERS 50
}
S /= (double) NR_TIME_ITERS;
- mean /= 10.0;
for (i = 0; i < NR_TIME_ITERS; i++)
- dprint(FD_TIME, "cycles[%d]=%llu\n", i,
- (unsigned long long) cycles[i] / 10);
+ dprint(FD_TIME, "cycles[%d]=%llu\n", i, (unsigned long long) cycles[i]);
avg /= samples;
- avg = (avg + 5) / 10;
- minc /= 10;
- maxc /= 10;
dprint(FD_TIME, "avg: %llu\n", (unsigned long long) avg);
dprint(FD_TIME, "min=%llu, max=%llu, mean=%f, S=%f\n",
(unsigned long long) minc,
inv_cycles_per_usec = 16777216UL / cycles_per_usec;
max_cycles_for_mult = ~0ULL / inv_cycles_per_usec;
dprint(FD_TIME, "inv_cycles_per_usec=%lu\n", inv_cycles_per_usec);
+#ifdef ARCH_CPU_CLOCK_WRAPS
cycles_start = get_cpu_clock();
dprint(FD_TIME, "cycles_start=%llu\n", cycles_start);
+#endif
return 0;
}
#else
struct clock_entry *c;
os_cpu_mask_t cpu_mask;
uint32_t last_seq;
+ unsigned long long first;
int i;
if (fio_cpuset_init(&cpu_mask)) {
- int __err;
+ int __err = errno;
log_err("clock cpuset init failed: %s\n", strerror(__err));
goto err_out;
pthread_mutex_lock(&t->lock);
pthread_mutex_unlock(&t->started);
+ first = get_cpu_clock();
last_seq = 0;
c = &t->entries[0];
for (i = 0; i < t->nr_entries; i++, c++) {
unsigned long long clocks;
clocks = t->entries[i - 1].tsc - t->entries[0].tsc;
- log_info("cs: cpu%3d: %llu clocks seen\n", t->cpu, clocks);
+ log_info("cs: cpu%3d: %llu clocks seen, first %llu\n", t->cpu,
+ clocks, first);
}
/*
if (!t->entries[i - 1].tsc && !t->entries[0].tsc)
goto err;
+ fio_cpuset_exit(&cpu_mask);
return NULL;
err:
fio_cpuset_exit(&cpu_mask);
qsort(entries, tentries, sizeof(struct clock_entry), clock_cmp);
+ /* silence silly gcc */
+ prev = NULL;
for (failed = i = 0; i < tentries; i++) {
this = &entries[i];