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authorJens Axboe <axboe@kernel.dk>2013-01-10 11:23:19 +0100
committerJens Axboe <axboe@kernel.dk>2013-01-10 11:23:19 +0100
commit67bf982340d95ca98098ea050b54b4c7adb116c0 (patch)
tree00b8947272d1301426b199e8f98c6a5933969909 /gettime.c
parent78c1111eacdb594e0488d5adc508091fc2a3af88 (diff)
downloadfio-67bf982340d95ca98098ea050b54b4c7adb116c0.tar.gz
fio-67bf982340d95ca98098ea050b54b4c7adb116c0.tar.bz2
Add configure script
Get rid of all the fragile guessing and checking of features, and roll a configure script instead. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'gettime.c')
-rw-r--r--gettime.c84
1 files changed, 59 insertions, 25 deletions
diff --git a/gettime.c b/gettime.c
index 1648b17b..e60d3e20 100644
--- a/gettime.c
+++ b/gettime.c
@@ -24,7 +24,11 @@ struct tv_valid {
int last_tv_valid;
unsigned long last_cycles;
};
+#ifdef CONFIG_TLS_THREAD
+static struct tv_valid __thread static_tv_valid;
+#else
static pthread_key_t tv_tls_key;
+#endif
enum fio_cs fio_clock_source = FIO_PREFERRED_CLOCK_SOURCE;
int fio_clock_source_set = 0;
@@ -121,40 +125,34 @@ static void fio_init gtod_init(void)
#endif /* FIO_DEBUG_TIME */
+#ifdef CONFIG_CLOCK_GETTIME
static int fill_clock_gettime(struct timespec *ts)
{
-#ifdef FIO_HAVE_CLOCK_MONOTONIC
+#ifdef CONFIG_CLOCK_MONOTONIC
return clock_gettime(CLOCK_MONOTONIC, ts);
#else
return clock_gettime(CLOCK_REALTIME, ts);
#endif
}
-
-#ifdef FIO_DEBUG_TIME
-void fio_gettime(struct timeval *tp, void *caller)
-#else
-void fio_gettime(struct timeval *tp, void fio_unused *caller)
#endif
+
+static void *__fio_gettime(struct timeval *tp)
{
struct tv_valid *tv;
-#ifdef FIO_DEBUG_TIME
- if (!caller)
- caller = __builtin_return_address(0);
-
- gtod_log_caller(caller);
-#endif
- if (fio_tv) {
- memcpy(tp, fio_tv, sizeof(*tp));
- return;
- }
-
+#ifdef CONFIG_TLS_THREAD
+ tv = &static_tv_valid;
+#else
tv = pthread_getspecific(tv_tls_key);
+#endif
switch (fio_clock_source) {
+#ifdef CONFIG_GETTIMEOFDAY
case CS_GTOD:
gettimeofday(tp, NULL);
break;
+#endif
+#ifdef CONFIG_CLOCK_GETTIME
case CS_CGETTIME: {
struct timespec ts;
@@ -167,6 +165,7 @@ void fio_gettime(struct timeval *tp, void fio_unused *caller)
tp->tv_usec = ts.tv_nsec / 1000;
break;
}
+#endif
#ifdef ARCH_HAVE_CPU_CLOCK
case CS_CPUCLOCK: {
unsigned long long usecs, t;
@@ -189,6 +188,30 @@ void fio_gettime(struct timeval *tp, void fio_unused *caller)
break;
}
+ return tv;
+}
+
+#ifdef FIO_DEBUG_TIME
+void fio_gettime(struct timeval *tp, void *caller)
+#else
+void fio_gettime(struct timeval *tp, void fio_unused *caller)
+#endif
+{
+ struct tv_valid *tv;
+
+#ifdef FIO_DEBUG_TIME
+ if (!caller)
+ caller = __builtin_return_address(0);
+
+ gtod_log_caller(caller);
+#endif
+ if (fio_tv) {
+ memcpy(tp, fio_tv, sizeof(*tp));
+ return;
+ }
+
+ tv = __fio_gettime(tp);
+
/*
* If Linux is using the tsc clock on non-synced processors,
* sometimes time can appear to drift backwards. Fix that up.
@@ -209,21 +232,22 @@ void fio_gettime(struct timeval *tp, void fio_unused *caller)
#ifdef ARCH_HAVE_CPU_CLOCK
static unsigned long get_cycles_per_usec(void)
{
- struct timespec ts;
struct timeval s, e;
unsigned long long c_s, c_e;
+ enum fio_cs old_cs = fio_clock_source;
- fill_clock_gettime(&ts);
- s.tv_sec = ts.tv_sec;
- s.tv_usec = ts.tv_nsec / 1000;
+#ifdef CONFIG_CLOCK_GETTIME
+ fio_clock_source = CS_CGETTIME;
+#else
+ fio_clock_source = CS_GTOD;
+#endif
+ __fio_gettime(&s);
c_s = get_cpu_clock();
do {
unsigned long long elapsed;
- fill_clock_gettime(&ts);
- e.tv_sec = ts.tv_sec;
- e.tv_usec = ts.tv_nsec / 1000;
+ __fio_gettime(&e);
elapsed = utime_since(&s, &e);
if (elapsed >= 1280) {
@@ -232,6 +256,7 @@ static unsigned long get_cycles_per_usec(void)
}
} while (1);
+ fio_clock_source = old_cs;
return (c_e - c_s + 127) >> 7;
}
@@ -287,6 +312,7 @@ static void calibrate_cpu_clock(void)
}
#endif
+#ifndef CONFIG_TLS_THREAD
void fio_local_clock_init(int is_thread)
{
struct tv_valid *t;
@@ -300,14 +326,21 @@ static void kill_tv_tls_key(void *data)
{
free(data);
}
+#else
+void fio_local_clock_init(int is_thread)
+{
+}
+#endif
void fio_clock_init(void)
{
if (fio_clock_source == fio_clock_source_inited)
return;
+#ifndef CONFIG_TLS_THREAD
if (pthread_key_create(&tv_tls_key, kill_tv_tls_key))
log_err("fio: can't create TLS key\n");
+#endif
fio_clock_source_inited = fio_clock_source;
calibrate_cpu_clock();
@@ -390,7 +423,8 @@ uint64_t time_since_now(struct timeval *s)
return mtime_since_now(s) / 1000;
}
-#if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK)
+#if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) && \
+ defined(CONFIG_SFAA)
#define CLOCK_ENTRIES 100000