From: Jens Axboe <axboe@kernel.dk>
Date: Thu, 16 Feb 2012 21:22:46 +0000 (+0100)
Subject: mutex: more clock fixes
X-Git-Tag: fio-2.0.4~27
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=b4c1fb368f9863449e4c0312df845b58f8b67717;ds=inline

mutex: more clock fixes

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/mutex.c b/mutex.c
index cc4e353d..ff6ec730 100644
--- a/mutex.c
+++ b/mutex.c
@@ -8,6 +8,7 @@
 #include <pthread.h>
 #include <sys/mman.h>
 
+#include "fio.h"
 #include "log.h"
 #include "mutex.h"
 #include "arch/arch.h"
@@ -16,6 +17,8 @@
 #include "time.h"
 #include "gettime.h"
 
+static clockid_t fio_clk_id = CLOCK_REALTIME;
+
 void fio_mutex_remove(struct fio_mutex *mutex)
 {
 	pthread_cond_destroy(&mutex->cond);
@@ -62,9 +65,7 @@ struct fio_mutex *fio_mutex_init(int value)
 	pthread_condattr_setpshared(&cond, PTHREAD_PROCESS_SHARED);
 #endif
 #ifdef FIO_HAVE_CLOCK_MONOTONIC
-	pthread_condattr_setclock(&cond, CLOCK_MONOTONIC);
-#else
-	pthread_condattr_setclock(&cond, CLOCK_REALTIME);
+	pthread_condattr_setclock(&cond, fio_clk_id);
 #endif
 	pthread_cond_init(&mutex->cond, &cond);
 
@@ -98,11 +99,7 @@ int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int seconds)
 
 	fio_gettime(&tv_s, NULL);
 
-#ifdef FIO_HAVE_CLOCK_MONOTONIC
-	clock_gettime(CLOCK_MONOTONIC, &t);
-#else
-	clock_gettime(CLOCK_REALTIME, &t);
-#endif
+	clock_gettime(fio_clk_id, &t);
 	t.tv_sec += seconds;
 
 	pthread_mutex_lock(&mutex->lock);
@@ -202,3 +199,19 @@ void fio_mutex_up_write(struct fio_mutex *mutex)
 		pthread_cond_signal(&mutex->cond);
 	pthread_mutex_unlock(&mutex->lock);
 }
+
+static void fio_init fio_mutex_global_init(void)
+{
+#ifdef FIO_HAVE_PTHREAD_CONDATTR_SETCLOCK
+#ifdef FIO_HAVE_CLOCK_MONOTONIC
+	pthread_condattr_t cond;
+
+	pthread_condattr_init(&cond);
+
+	if (!pthread_condattr_setclock(&cond, CLOCK_MONOTONIC))
+		fio_clk_id = CLOCK_MONOTONIC;
+
+	pthread_condattr_destroy(&cond);
+#endif
+#endif
+}
diff --git a/os/os-aix.h b/os/os-aix.h
index 2f75bf8f..3cbc80f3 100644
--- a/os/os-aix.h
+++ b/os/os-aix.h
@@ -14,6 +14,7 @@
 #define FIO_HAVE_ODIRECT
 #define FIO_USE_GENERIC_RAND
 #define FIO_HAVE_CLOCK_MONOTONIC
+#define FIO_HAVE_PTHREAD_CONDATTR_SETCLOCK
 
 /*
  * This is broken on AIX if _LARGE_FILES is defined...
diff --git a/os/os-freebsd.h b/os/os-freebsd.h
index 93205c32..976bd842 100644
--- a/os/os-freebsd.h
+++ b/os/os-freebsd.h
@@ -17,8 +17,9 @@
 #define FIO_HAVE_STRSEP
 #define FIO_USE_GENERIC_RAND
 #define FIO_HAVE_CHARDEV_SIZE
-#define FIO_HAVE_CLOCK_MONOTONIC
 #define FIO_HAVE_GETTID
+#define FIO_HAVE_CLOCK_MONOTONIC
+#define FIO_HAVE_PTHREAD_CONDATTR_SETCLOCK
 
 #define OS_MAP_ANON		MAP_ANON
 
diff --git a/os/os-linux.h b/os/os-linux.h
index 9f547fff..61dfa303 100644
--- a/os/os-linux.h
+++ b/os/os-linux.h
@@ -44,6 +44,7 @@
 #define FIO_HAVE_TRIM
 #define FIO_HAVE_BINJECT
 #define FIO_HAVE_CLOCK_MONOTONIC
+#define FIO_HAVE_PTHREAD_CONDATTR_SETCLOCK
 #define FIO_HAVE_GETTID
 
 /*
diff --git a/os/os-mac.h b/os/os-mac.h
index aec30f96..e4c2bc8e 100644
--- a/os/os-mac.h
+++ b/os/os-mac.h
@@ -29,6 +29,7 @@
 #define FIO_USE_GENERIC_RAND
 #define FIO_HAVE_GETTID
 #define FIO_HAVE_CHARDEV_SIZE
+#define FIO_HAVE_PTHREAD_CONDATTR_SETCLOCK
 
 #define OS_MAP_ANON		MAP_ANON