/*
- * 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.
extern "C" {
#endif
+struct ds;
struct pollfd;
struct timespec;
struct timeval;
/* 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);
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 *);
int get_cpu_usage(void);
+void format_backtraces(struct ds *, size_t min_count);
long long int time_boot_msec(void);