X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Ftimeval.h;h=8dd2e2b06ab392700b8335f8b830287dd2a84f4a;hb=7aaeab4df24b7e9460705b1dad1010eef0354c50;hp=5a7b6e25c62aeabc09b3b1089913446a828a8576;hpb=7c690f462fec1af60d76c67fac226fc648ea9149;p=sliver-openvswitch.git

diff --git a/lib/timeval.h b/lib/timeval.h
index 5a7b6e25c..8dd2e2b06 100644
--- a/lib/timeval.h
+++ b/lib/timeval.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -43,28 +43,20 @@ BUILD_ASSERT_DECL(TYPE_IS_SIGNED(time_t));
 /* Interval between updates to the reported time, in ms.  This should not be
  * adjusted much below 10 ms or so with the current implementation, or too
  * much time will be wasted in signal handlers and calls to clock_gettime(). */
-#define TIME_UPDATE_INTERVAL 100
+#define TIME_UPDATE_INTERVAL 25
 
-/* True on systems (particularly x86-64 Linux) where clock_gettime() is
- * inexpensive.  On these systems, we don't bother caching the current time.
- * Instead, we consult clock_gettime() directly when needed.
- *
- * False on systems where clock_gettime() is relatively expensive.  On these
- * systems, we cache the current time and set up a periodic SIGALRM to remind
- * us to update it.
- *
- * Also false on systems (e.g. ESX) that don't support setting up timers based
- * on a monotonically increasing clock. */
+/* True on systems that support a monotonic clock.  Compared to just getting
+ * the value of a variable, clock_gettime() is somewhat expensive, even on
+ * systems that try hard to optimize it (such as x86-64 Linux), so it's
+ * worthwhile to minimize calls via caching. */
 #ifndef CACHE_TIME
-#if defined ESX || (defined __x86_64__ && defined LINUX_DATAPATH)
+#if defined ESX
 #define CACHE_TIME 0
 #else
 #define CACHE_TIME 1
 #endif
 #endif /* ifndef CACHE_TIME */
 
-void time_disable_restart(void);
-void time_enable_restart(void);
 void time_postfork(void);
 void time_refresh(void);
 time_t time_now(void);
@@ -76,15 +68,14 @@ void time_wall_timespec(struct timespec *);
 void time_alarm(unsigned int secs);
 int time_poll(struct pollfd *, int n_pollfds, long long int timeout_when,
               int *elapsed);
-bool time_cached(void);
 
 long long int timespec_to_msec(const struct timespec *);
 long long int timeval_to_msec(const struct timeval *);
 
 void xgettimeofday(struct timeval *);
+void xclock_gettime(clock_t, struct timespec *);
 
 int get_cpu_usage(void);
-void format_backtraces(struct ds *, size_t min_count);
 
 long long int time_boot_msec(void);