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doc: fix typos in fio man page
[fio.git]
/
gettime.c
diff --git
a/gettime.c
b/gettime.c
index 1cbef84b0d765f224309214067fa92f1048c7fed..c256a96c16c8f26253a253c82d23d23f4a5d914c 100644
(file)
--- a/
gettime.c
+++ b/
gettime.c
@@
-548,7
+548,7
@@
uint64_t time_since_now(const struct timespec *s)
}
#if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) && \
}
#if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) && \
- defined(CONFIG_S
FAA
)
+ defined(CONFIG_S
YNC_SYNC) && defined(CONFIG_CMP_SWAP
)
#define CLOCK_ENTRIES_DEBUG 100000
#define CLOCK_ENTRIES_TEST 1000
#define CLOCK_ENTRIES_DEBUG 100000
#define CLOCK_ENTRIES_TEST 1000
@@
-570,9
+570,10
@@
struct clock_thread {
struct clock_entry *entries;
};
struct clock_entry *entries;
};
-static inline uint32_t atomic32_inc_return(uint32_t *seq)
+static inline uint32_t atomic32_compare_and_swap(uint32_t *ptr, uint32_t old,
+ uint32_t new)
{
{
- return
1 + __sync_fetch_and_add(seq, 1
);
+ return
__sync_val_compare_and_swap(ptr, old, new
);
}
static void *clock_thread_fn(void *data)
}
static void *clock_thread_fn(void *data)
@@
-580,7
+581,6
@@
static void *clock_thread_fn(void *data)
struct clock_thread *t = data;
struct clock_entry *c;
os_cpu_mask_t cpu_mask;
struct clock_thread *t = data;
struct clock_entry *c;
os_cpu_mask_t cpu_mask;
- uint32_t last_seq;
unsigned long long first;
int i;
unsigned long long first;
int i;
@@
-604,7
+604,6
@@
static void *clock_thread_fn(void *data)
pthread_mutex_unlock(&t->started);
first = get_cpu_clock();
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++) {
uint32_t seq;
c = &t->entries[0];
for (i = 0; i < t->nr_entries; i++, c++) {
uint32_t seq;
@@
-612,11
+611,15
@@
static void *clock_thread_fn(void *data)
c->cpu = t->cpu;
do {
c->cpu = t->cpu;
do {
- seq =
atomic32_inc_return(t->seq)
;
- if (seq
< last_seq
)
+ seq =
*t->seq
;
+ if (seq
== UINT_MAX
)
break;
break;
+ __sync_synchronize();
tsc = get_cpu_clock();
tsc = get_cpu_clock();
- } while (seq != *t->seq);
+ } while (seq != atomic32_compare_and_swap(t->seq, seq, seq + 1));
+
+ if (seq == UINT_MAX)
+ break;
c->seq = seq;
c->tsc = tsc;
c->seq = seq;
c->tsc = tsc;
@@
-634,7
+637,7
@@
static void *clock_thread_fn(void *data)
* The most common platform clock breakage is returning zero
* indefinitely. Check for that and return failure.
*/
* The most common platform clock breakage is returning zero
* indefinitely. Check for that and return failure.
*/
- if (!t->entries[i - 1].tsc && !t->entries[0].tsc)
+ if (
i > 1 &&
!t->entries[i - 1].tsc && !t->entries[0].tsc)
goto err;
fio_cpuset_exit(&cpu_mask);
goto err;
fio_cpuset_exit(&cpu_mask);