/*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "timeval.h"
#include <errno.h>
#include <poll.h>
+#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include "fatal-signal.h"
#include "hash.h"
#include "hmap.h"
+#include "ovs-rcu.h"
#include "ovs-thread.h"
#include "signals.h"
+#include "seq.h"
#include "unixctl.h"
#include "util.h"
#include "vlog.h"
-/* backtrace() from <execinfo.h> is really useful, but it is not signal safe
- * everywhere, such as on x86-64. */
-#if HAVE_BACKTRACE && !defined __x86_64__
-# define USE_BACKTRACE 1
-# include <execinfo.h>
-#else
-# define USE_BACKTRACE 0
+VLOG_DEFINE_THIS_MODULE(timeval);
+
+#ifdef _WIN32
+typedef unsigned int clockid_t;
+
+#ifndef CLOCK_MONOTONIC
+#define CLOCK_MONOTONIC 1
#endif
-VLOG_DEFINE_THIS_MODULE(timeval);
+#ifndef CLOCK_REALTIME
+#define CLOCK_REALTIME 2
+#endif
-/* The clock to use for measuring time intervals. This is CLOCK_MONOTONIC by
- * preference, but on systems that don't have a monotonic clock we fall back
- * to CLOCK_REALTIME. */
-static clockid_t monotonic_clock;
+/* Number of 100 ns intervals from January 1, 1601 till January 1, 1970. */
+static ULARGE_INTEGER unix_epoch;
+#endif /* _WIN32 */
-/* Has a timer tick occurred? Only relevant if CACHE_TIME is true.
- *
- * We initialize these to true to force time_init() to get called on the first
- * call to time_msec() or another function that queries the current time. */
-static volatile sig_atomic_t wall_tick = true;
-static volatile sig_atomic_t monotonic_tick = true;
+struct clock {
+ clockid_t id; /* CLOCK_MONOTONIC or CLOCK_REALTIME. */
-/* The current time, as of the last refresh. */
-static struct timespec wall_time;
-static struct timespec monotonic_time;
+ /* Features for use by unit tests. Protected by 'mutex'. */
+ struct ovs_mutex mutex;
+ atomic_bool slow_path; /* True if warped or stopped. */
+ struct timespec warp OVS_GUARDED; /* Offset added for unit tests. */
+ bool stopped OVS_GUARDED; /* Disable real-time updates if true. */
+ struct timespec cache OVS_GUARDED; /* Last time read from kernel. */
+};
+
+/* Our clocks. */
+static struct clock monotonic_clock; /* CLOCK_MONOTONIC, if available. */
+static struct clock wall_clock; /* CLOCK_REALTIME. */
/* The monotonic time at which the time module was initialized. */
static long long int boot_time;
-/* features for use by unit tests. */
-static struct timespec warp_offset; /* Offset added to monotonic_time. */
-static bool time_stopped; /* Disables real-time updates, if true. */
+/* True only when timeval_dummy_register() is called. */
+static bool timewarp_enabled;
+/* Reference to the seq struct. Threads other than main thread can
+ * wait on timewarp_seq and be waken up when time is warped. */
+static struct seq *timewarp_seq;
+/* Last value of 'timewarp_seq'. */
+DEFINE_STATIC_PER_THREAD_DATA(uint64_t, last_seq, 0);
-/* Time in milliseconds at which to die with SIGALRM (if not LLONG_MAX). */
+/* Monotonic time in milliseconds at which to die with SIGALRM (if not
+ * LLONG_MAX). */
static long long int deadline = LLONG_MAX;
-struct trace {
- void *backtrace[32]; /* Populated by backtrace(). */
- size_t n_frames; /* Number of frames in 'backtrace'. */
-
- /* format_backtraces() helper data. */
- struct hmap_node node;
- size_t count;
-};
+/* Monotonic time, in milliseconds, at which the last call to time_poll() woke
+ * up. */
+DEFINE_STATIC_PER_THREAD_DATA(long long int, last_wakeup, 0);
-#define MAX_TRACES 50
-static struct trace traces[MAX_TRACES];
-static size_t trace_head = 0;
-
-static void set_up_timer(void);
-static void set_up_signal(int flags);
-static void sigalrm_handler(int);
-static void refresh_wall_if_ticked(void);
-static void refresh_monotonic_if_ticked(void);
-static void block_sigalrm(sigset_t *);
-static void unblock_sigalrm(const sigset_t *);
static void log_poll_interval(long long int last_wakeup);
static struct rusage *get_recent_rusage(void);
static void refresh_rusage(void);
static void timespec_add(struct timespec *sum,
const struct timespec *a, const struct timespec *b);
-static unixctl_cb_func backtrace_cb;
-
-#if !USE_BACKTRACE
-static int
-backtrace(void **buffer OVS_UNUSED, int size OVS_UNUSED)
-{
- NOT_REACHED();
-}
-static char **
-backtrace_symbols(void *const *buffer OVS_UNUSED, int size OVS_UNUSED)
+static void
+init_clock(struct clock *c, clockid_t id)
{
- NOT_REACHED();
+ memset(c, 0, sizeof *c);
+ c->id = id;
+ ovs_mutex_init(&c->mutex);
+ atomic_init(&c->slow_path, false);
+ xclock_gettime(c->id, &c->cache);
+ timewarp_seq = seq_create();
}
-#endif /* !USE_BACKTRACE */
-/* Initializes the timetracking module, if not already initialized. */
static void
-time_init(void)
+do_init_time(void)
{
- static bool inited;
-
- if (inited) {
- return;
- }
- inited = true;
-
- /* The implementation of backtrace() in glibc does some one time
- * initialization which is not signal safe. This can cause deadlocks if
- * run from the signal handler. As a workaround, force the initialization
- * to happen here. */
- if (USE_BACKTRACE) {
- void *bt[1];
-
- backtrace(bt, ARRAY_SIZE(bt));
- }
+ struct timespec ts;
- memset(traces, 0, sizeof traces);
+#ifdef _WIN32
+ /* Calculate number of 100-nanosecond intervals till 01/01/1970. */
+ SYSTEMTIME unix_epoch_st = { 1970, 1, 0, 1, 0, 0, 0, 0};
+ FILETIME unix_epoch_ft;
- if (USE_BACKTRACE && CACHE_TIME) {
- unixctl_command_register("backtrace", "", 0, 0, backtrace_cb, NULL);
- }
+ SystemTimeToFileTime(&unix_epoch_st, &unix_epoch_ft);
+ unix_epoch.LowPart = unix_epoch_ft.dwLowDateTime;
+ unix_epoch.HighPart = unix_epoch_ft.dwHighDateTime;
+#endif
coverage_init();
- if (!clock_gettime(CLOCK_MONOTONIC, &monotonic_time)) {
- monotonic_clock = CLOCK_MONOTONIC;
- } else {
- monotonic_clock = CLOCK_REALTIME;
- VLOG_DBG("monotonic timer not available");
- }
-
- set_up_signal(SA_RESTART);
- set_up_timer();
-
- boot_time = time_msec();
+ init_clock(&monotonic_clock, (!clock_gettime(CLOCK_MONOTONIC, &ts)
+ ? CLOCK_MONOTONIC
+ : CLOCK_REALTIME));
+ init_clock(&wall_clock, CLOCK_REALTIME);
+ boot_time = timespec_to_msec(&monotonic_clock.cache);
}
+/* Initializes the timetracking module, if not already initialized. */
static void
-set_up_signal(int flags)
+time_init(void)
{
- struct sigaction sa;
-
- memset(&sa, 0, sizeof sa);
- sa.sa_handler = sigalrm_handler;
- sigemptyset(&sa.sa_mask);
- sa.sa_flags = flags;
- xsigaction(SIGALRM, &sa, NULL);
+ static pthread_once_t once = PTHREAD_ONCE_INIT;
+ pthread_once(&once, do_init_time);
}
static void
-set_up_timer(void)
+time_timespec__(struct clock *c, struct timespec *ts)
{
- static timer_t timer_id; /* "static" to avoid apparent memory leak. */
- struct itimerspec itimer;
+ bool slow_path;
- if (!CACHE_TIME) {
- return;
- }
-
- if (timer_create(monotonic_clock, NULL, &timer_id)) {
- VLOG_FATAL("timer_create failed (%s)", ovs_strerror(errno));
- }
-
- itimer.it_interval.tv_sec = 0;
- itimer.it_interval.tv_nsec = TIME_UPDATE_INTERVAL * 1000 * 1000;
- itimer.it_value = itimer.it_interval;
+ time_init();
- if (timer_settime(timer_id, 0, &itimer, NULL)) {
- VLOG_FATAL("timer_settime failed (%s)", ovs_strerror(errno));
+ atomic_read_explicit(&c->slow_path, &slow_path, memory_order_relaxed);
+ if (!slow_path) {
+ xclock_gettime(c->id, ts);
+ } else {
+ struct timespec warp;
+ struct timespec cache;
+ bool stopped;
+
+ ovs_mutex_lock(&c->mutex);
+ stopped = c->stopped;
+ warp = c->warp;
+ cache = c->cache;
+ ovs_mutex_unlock(&c->mutex);
+
+ if (!stopped) {
+ xclock_gettime(c->id, &cache);
+ }
+ timespec_add(ts, &cache, &warp);
}
}
-/* Set up the interval timer, to ensure that time advances even without calling
- * time_refresh().
- *
- * A child created with fork() does not inherit the parent's interval timer, so
- * this function needs to be called from the child after fork(). */
+/* Stores a monotonic timer, accurate within TIME_UPDATE_INTERVAL ms, into
+ * '*ts'. */
void
-time_postfork(void)
+time_timespec(struct timespec *ts)
{
- time_init();
- set_up_timer();
+ time_timespec__(&monotonic_clock, ts);
}
-static void
-refresh_wall(void)
+/* Stores the current time, accurate within TIME_UPDATE_INTERVAL ms, into
+ * '*ts'. */
+void
+time_wall_timespec(struct timespec *ts)
{
- time_init();
- xclock_gettime(CLOCK_REALTIME, &wall_time);
- wall_tick = false;
+ time_timespec__(&wall_clock, ts);
}
-static void
-refresh_monotonic(void)
+static time_t
+time_sec__(struct clock *c)
{
- time_init();
-
- if (!time_stopped) {
- if (monotonic_clock == CLOCK_MONOTONIC) {
- xclock_gettime(monotonic_clock, &monotonic_time);
- } else {
- refresh_wall_if_ticked();
- monotonic_time = wall_time;
- }
- timespec_add(&monotonic_time, &monotonic_time, &warp_offset);
-
- monotonic_tick = false;
- }
-}
+ struct timespec ts;
-/* Forces a refresh of the current time from the kernel. It is not usually
- * necessary to call this function, since the time will be refreshed
- * automatically at least every TIME_UPDATE_INTERVAL milliseconds. If
- * CACHE_TIME is false, we will always refresh the current time so this
- * function has no effect. */
-void
-time_refresh(void)
-{
- wall_tick = monotonic_tick = true;
+ time_timespec__(c, &ts);
+ return ts.tv_sec;
}
/* Returns a monotonic timer, in seconds. */
time_t
time_now(void)
{
- refresh_monotonic_if_ticked();
- return monotonic_time.tv_sec;
+ return time_sec__(&monotonic_clock);
}
/* Returns the current time, in seconds. */
time_t
time_wall(void)
{
- refresh_wall_if_ticked();
- return wall_time.tv_sec;
+ return time_sec__(&wall_clock);
+}
+
+static long long int
+time_msec__(struct clock *c)
+{
+ struct timespec ts;
+
+ time_timespec__(c, &ts);
+ return timespec_to_msec(&ts);
}
/* Returns a monotonic timer, in ms (within TIME_UPDATE_INTERVAL ms). */
long long int
time_msec(void)
{
- refresh_monotonic_if_ticked();
- return timespec_to_msec(&monotonic_time);
+ return time_msec__(&monotonic_clock);
}
/* Returns the current time, in ms (within TIME_UPDATE_INTERVAL ms). */
long long int
time_wall_msec(void)
{
- refresh_wall_if_ticked();
- return timespec_to_msec(&wall_time);
-}
-
-/* Stores a monotonic timer, accurate within TIME_UPDATE_INTERVAL ms, into
- * '*ts'. */
-void
-time_timespec(struct timespec *ts)
-{
- refresh_monotonic_if_ticked();
- *ts = monotonic_time;
-}
-
-/* Stores the current time, accurate within TIME_UPDATE_INTERVAL ms, into
- * '*ts'. */
-void
-time_wall_timespec(struct timespec *ts)
-{
- refresh_wall_if_ticked();
- *ts = wall_time;
+ return time_msec__(&wall_clock);
}
/* Configures the program to die with SIGALRM 'secs' seconds from now, if
assert_single_threaded();
time_init();
- time_refresh();
now = time_msec();
msecs = secs * 1000LL;
* timeout is reached. (Because of this property, this function will
* never return -EINTR.)
*
- * - As a side effect, refreshes the current time (like time_refresh()).
- *
* Stores the number of milliseconds elapsed during poll in '*elapsed'. */
int
-time_poll(struct pollfd *pollfds, int n_pollfds, long long int timeout_when,
- int *elapsed)
+time_poll(struct pollfd *pollfds, int n_pollfds, HANDLE *handles OVS_UNUSED,
+ long long int timeout_when, int *elapsed)
{
- static long long int last_wakeup = 0;
+ long long int *last_wakeup = last_wakeup_get();
long long int start;
- sigset_t oldsigs;
- bool blocked;
- int retval;
+ bool quiescent;
+ int retval = 0;
- time_refresh();
- if (last_wakeup) {
- log_poll_interval(last_wakeup);
- }
+ time_init();
coverage_clear();
+ coverage_run();
+ if (*last_wakeup) {
+ log_poll_interval(*last_wakeup);
+ }
start = time_msec();
- blocked = false;
timeout_when = MIN(timeout_when, deadline);
+ quiescent = ovsrcu_is_quiescent();
for (;;) {
long long int now = time_msec();
time_left = timeout_when - now;
}
+ if (!quiescent) {
+ if (!time_left) {
+ ovsrcu_quiesce();
+ } else {
+ ovsrcu_quiesce_start();
+ }
+ }
+
+#ifndef _WIN32
retval = poll(pollfds, n_pollfds, time_left);
if (retval < 0) {
retval = -errno;
}
+#else
+ if (n_pollfds > MAXIMUM_WAIT_OBJECTS) {
+ VLOG_ERR("Cannot handle more than maximum wait objects\n");
+ } else if (n_pollfds != 0) {
+ retval = WaitForMultipleObjects(n_pollfds, handles, FALSE,
+ time_left);
+ }
+ if (retval < 0) {
+ /* XXX This will be replace by a win error to errno
+ conversion function */
+ retval = -WSAGetLastError();
+ retval = -EINVAL;
+ }
+#endif
+
+ if (!quiescent && time_left) {
+ ovsrcu_quiesce_end();
+ }
- time_refresh();
if (deadline <= time_msec()) {
+#ifndef _WIN32
fatal_signal_handler(SIGALRM);
+#else
+ VLOG_ERR("wake up from WaitForMultipleObjects after deadline");
+ fatal_signal_handler(SIGTERM);
+#endif
if (retval < 0) {
retval = 0;
}
if (retval != -EINTR) {
break;
}
-
- if (!blocked && CACHE_TIME) {
- block_sigalrm(&oldsigs);
- blocked = true;
- }
- }
- if (blocked) {
- unblock_sigalrm(&oldsigs);
}
- last_wakeup = time_msec();
+ *last_wakeup = time_msec();
refresh_rusage();
- *elapsed = last_wakeup - start;
+ *elapsed = *last_wakeup - start;
return retval;
}
-static void
-sigalrm_handler(int sig_nr OVS_UNUSED)
-{
- wall_tick = true;
- monotonic_tick = true;
-
- if (USE_BACKTRACE && CACHE_TIME) {
- struct trace *trace = &traces[trace_head];
-
- trace->n_frames = backtrace(trace->backtrace,
- ARRAY_SIZE(trace->backtrace));
- trace_head = (trace_head + 1) % MAX_TRACES;
- }
-}
-
-static void
-refresh_wall_if_ticked(void)
-{
- if (!CACHE_TIME || wall_tick) {
- refresh_wall();
- }
-}
-
-static void
-refresh_monotonic_if_ticked(void)
-{
- if (!CACHE_TIME || monotonic_tick) {
- refresh_monotonic();
- }
-}
-
-static void
-block_sigalrm(sigset_t *oldsigs)
-{
- sigset_t sigalrm;
- sigemptyset(&sigalrm);
- sigaddset(&sigalrm, SIGALRM);
- xpthread_sigmask(SIG_BLOCK, &sigalrm, oldsigs);
-}
-
-static void
-unblock_sigalrm(const sigset_t *oldsigs)
-{
- xpthread_sigmask(SIG_SETMASK, oldsigs, NULL);
-}
-
long long int
timespec_to_msec(const struct timespec *ts)
{
}
/* Returns the monotonic time at which the "time" module was initialized, in
- * milliseconds(). */
+ * milliseconds. */
long long int
time_boot_msec(void)
{
return boot_time;
}
+#ifdef _WIN32
+static ULARGE_INTEGER
+xgetfiletime(void)
+{
+ ULARGE_INTEGER current_time;
+ FILETIME current_time_ft;
+
+ /* Returns current time in UTC as a 64-bit value representing the number
+ * of 100-nanosecond intervals since January 1, 1601 . */
+ GetSystemTimePreciseAsFileTime(¤t_time_ft);
+ current_time.LowPart = current_time_ft.dwLowDateTime;
+ current_time.HighPart = current_time_ft.dwHighDateTime;
+
+ return current_time;
+}
+
+static int
+clock_gettime(clock_t id, struct timespec *ts)
+{
+ if (id == CLOCK_MONOTONIC) {
+ static LARGE_INTEGER freq;
+ LARGE_INTEGER count;
+ long long int ns;
+
+ if (!freq.QuadPart) {
+ /* Number of counts per second. */
+ QueryPerformanceFrequency(&freq);
+ }
+ /* Total number of counts from a starting point. */
+ QueryPerformanceCounter(&count);
+
+ /* Total nano seconds from a starting point. */
+ ns = (double) count.QuadPart / freq.QuadPart * 1000000000;
+
+ ts->tv_sec = count.QuadPart / freq.QuadPart;
+ ts->tv_nsec = ns % 1000000000;
+ } else if (id == CLOCK_REALTIME) {
+ ULARGE_INTEGER current_time = xgetfiletime();
+
+ /* Time from Epoch to now. */
+ ts->tv_sec = (current_time.QuadPart - unix_epoch.QuadPart) / 10000000;
+ ts->tv_nsec = ((current_time.QuadPart - unix_epoch.QuadPart) %
+ 10000000) * 100;
+ } else {
+ return -1;
+ }
+}
+#endif /* _WIN32 */
+
void
xgettimeofday(struct timeval *tv)
{
+#ifndef _WIN32
if (gettimeofday(tv, NULL) == -1) {
VLOG_FATAL("gettimeofday failed (%s)", ovs_strerror(errno));
}
+#else
+ ULARGE_INTEGER current_time = xgetfiletime();
+
+ tv->tv_sec = (current_time.QuadPart - unix_epoch.QuadPart) / 10000000;
+ tv->tv_usec = ((current_time.QuadPart - unix_epoch.QuadPart) %
+ 10000000) / 10;
+#endif
}
void
}
}
+/* Makes threads wait on timewarp_seq and be waken up when time is warped.
+ * This function will be no-op unless timeval_dummy_register() is called. */
+void
+timewarp_wait(void)
+{
+ if (timewarp_enabled) {
+ uint64_t *last_seq = last_seq_get();
+
+ *last_seq = seq_read(timewarp_seq);
+ seq_wait(timewarp_seq, *last_seq);
+ }
+}
+
static long long int
timeval_diff_msec(const struct timeval *a, const struct timeval *b)
{
*sum = tmp;
}
+static bool
+is_warped(const struct clock *c)
+{
+ bool warped;
+
+ ovs_mutex_lock(&c->mutex);
+ warped = monotonic_clock.warp.tv_sec || monotonic_clock.warp.tv_nsec;
+ ovs_mutex_unlock(&c->mutex);
+
+ return warped;
+}
+
static void
log_poll_interval(long long int last_wakeup)
{
long long int interval = time_msec() - last_wakeup;
- if (interval >= 1000 && !warp_offset.tv_sec && !warp_offset.tv_nsec) {
+ if (interval >= 1000 && !is_warped(&monotonic_clock)) {
const struct rusage *last_rusage = get_recent_rusage();
struct rusage rusage;
unsigned long long int cpu; /* Total user+system CPU usage when sampled. */
};
-static struct rusage recent_rusage;
-static struct cpu_usage older = { LLONG_MIN, 0 };
-static struct cpu_usage newer = { LLONG_MIN, 0 };
-static int cpu_usage = -1;
+struct cpu_tracker {
+ struct cpu_usage older;
+ struct cpu_usage newer;
+ int cpu_usage;
+
+ struct rusage recent_rusage;
+};
+DEFINE_PER_THREAD_MALLOCED_DATA(struct cpu_tracker *, cpu_tracker_var);
+
+static struct cpu_tracker *
+get_cpu_tracker(void)
+{
+ struct cpu_tracker *t = cpu_tracker_var_get();
+ if (!t) {
+ t = xzalloc(sizeof *t);
+ t->older.when = LLONG_MIN;
+ t->newer.when = LLONG_MIN;
+ cpu_tracker_var_set_unsafe(t);
+ }
+ return t;
+}
static struct rusage *
get_recent_rusage(void)
{
- return &recent_rusage;
+ return &get_cpu_tracker()->recent_rusage;
+}
+
+static int
+getrusage_thread(struct rusage *rusage OVS_UNUSED)
+{
+#ifdef RUSAGE_THREAD
+ return getrusage(RUSAGE_THREAD, rusage);
+#else
+ errno = EINVAL;
+ return -1;
+#endif
}
static void
refresh_rusage(void)
{
- long long int now;
+ struct cpu_tracker *t = get_cpu_tracker();
+ struct rusage *recent_rusage = &t->recent_rusage;
- now = time_msec();
- getrusage(RUSAGE_SELF, &recent_rusage);
-
- if (now >= newer.when + 3 * 1000) {
- older = newer;
- newer.when = now;
- newer.cpu = (timeval_to_msec(&recent_rusage.ru_utime) +
- timeval_to_msec(&recent_rusage.ru_stime));
-
- if (older.when != LLONG_MIN && newer.cpu > older.cpu) {
- unsigned int dividend = newer.cpu - older.cpu;
- unsigned int divisor = (newer.when - older.when) / 100;
- cpu_usage = divisor > 0 ? dividend / divisor : -1;
- } else {
- cpu_usage = -1;
+ if (!getrusage_thread(recent_rusage)) {
+ long long int now = time_msec();
+ if (now >= t->newer.when + 3 * 1000) {
+ t->older = t->newer;
+ t->newer.when = now;
+ t->newer.cpu = (timeval_to_msec(&recent_rusage->ru_utime) +
+ timeval_to_msec(&recent_rusage->ru_stime));
+
+ if (t->older.when != LLONG_MIN && t->newer.cpu > t->older.cpu) {
+ unsigned int dividend = t->newer.cpu - t->older.cpu;
+ unsigned int divisor = (t->newer.when - t->older.when) / 100;
+ t->cpu_usage = divisor > 0 ? dividend / divisor : -1;
+ } else {
+ t->cpu_usage = -1;
+ }
}
}
}
int
get_cpu_usage(void)
{
- return cpu_usage;
-}
-
-static uint32_t
-hash_trace(struct trace *trace)
-{
- return hash_bytes(trace->backtrace,
- trace->n_frames * sizeof *trace->backtrace, 0);
-}
-
-static struct trace *
-trace_map_lookup(struct hmap *trace_map, struct trace *key)
-{
- struct trace *value;
-
- HMAP_FOR_EACH_WITH_HASH (value, node, hash_trace(key), trace_map) {
- if (key->n_frames == value->n_frames
- && !memcmp(key->backtrace, value->backtrace,
- key->n_frames * sizeof *key->backtrace)) {
- return value;
- }
- }
- return NULL;
-}
-
-/* Appends a string to 'ds' representing backtraces recorded at regular
- * intervals in the recent past. This information can be used to get a sense
- * of what the process has been spending the majority of time doing. Will
- * ommit any backtraces which have not occurred at least 'min_count' times. */
-void
-format_backtraces(struct ds *ds, size_t min_count)
-{
- time_init();
-
- if (USE_BACKTRACE && CACHE_TIME) {
- struct hmap trace_map = HMAP_INITIALIZER(&trace_map);
- struct trace *trace, *next;
- sigset_t oldsigs;
- size_t i;
-
- block_sigalrm(&oldsigs);
-
- for (i = 0; i < MAX_TRACES; i++) {
- struct trace *trace = &traces[i];
- struct trace *map_trace;
-
- if (!trace->n_frames) {
- continue;
- }
-
- map_trace = trace_map_lookup(&trace_map, trace);
- if (map_trace) {
- map_trace->count++;
- } else {
- hmap_insert(&trace_map, &trace->node, hash_trace(trace));
- trace->count = 1;
- }
- }
-
- HMAP_FOR_EACH_SAFE (trace, next, node, &trace_map) {
- char **frame_strs;
- size_t j;
-
- hmap_remove(&trace_map, &trace->node);
-
- if (trace->count < min_count) {
- continue;
- }
-
- frame_strs = backtrace_symbols(trace->backtrace, trace->n_frames);
-
- ds_put_format(ds, "Count %zu\n", trace->count);
- for (j = 0; j < trace->n_frames; j++) {
- ds_put_format(ds, "%s\n", frame_strs[j]);
- }
- ds_put_cstr(ds, "\n");
-
- free(frame_strs);
- }
- hmap_destroy(&trace_map);
-
- ds_chomp(ds, '\n');
- unblock_sigalrm(&oldsigs);
- }
+ return get_cpu_tracker()->cpu_usage;
}
\f
/* Unixctl interface. */
int argc OVS_UNUSED, const char *argv[] OVS_UNUSED,
void *aux OVS_UNUSED)
{
- time_stopped = true;
+ ovs_mutex_lock(&monotonic_clock.mutex);
+ atomic_store(&monotonic_clock.slow_path, true);
+ monotonic_clock.stopped = true;
+ xclock_gettime(monotonic_clock.id, &monotonic_clock.cache);
+ ovs_mutex_unlock(&monotonic_clock.mutex);
+
unixctl_command_reply(conn, NULL);
}
ts.tv_sec = msecs / 1000;
ts.tv_nsec = (msecs % 1000) * 1000 * 1000;
- timespec_add(&warp_offset, &warp_offset, &ts);
- timespec_add(&monotonic_time, &monotonic_time, &ts);
- unixctl_command_reply(conn, "warped");
-}
-static void
-backtrace_cb(struct unixctl_conn *conn,
- int argc OVS_UNUSED, const char *argv[] OVS_UNUSED,
- void *aux OVS_UNUSED)
-{
- struct ds ds = DS_EMPTY_INITIALIZER;
-
- ovs_assert(USE_BACKTRACE && CACHE_TIME);
- format_backtraces(&ds, 0);
- unixctl_command_reply(conn, ds_cstr(&ds));
- ds_destroy(&ds);
+ ovs_mutex_lock(&monotonic_clock.mutex);
+ atomic_store(&monotonic_clock.slow_path, true);
+ timespec_add(&monotonic_clock.warp, &monotonic_clock.warp, &ts);
+ ovs_mutex_unlock(&monotonic_clock.mutex);
+ seq_change(timewarp_seq);
+ /* give threads (eg. monitor) some chances to run */
+#ifndef _WIN32
+ poll(NULL, 0, 10);
+#else
+ Sleep(10);
+#endif
+ unixctl_command_reply(conn, "warped");
}
void
timeval_dummy_register(void)
{
+ timewarp_enabled = true;
unixctl_command_register("time/stop", "", 0, 0, timeval_stop_cb, NULL);
unixctl_command_register("time/warp", "MSECS", 1, 1,
timeval_warp_cb, NULL);
}
+
+
+
+/* strftime() with an extension for high-resolution timestamps. Any '#'s in
+ * 'format' will be replaced by subseconds, e.g. use "%S.###" to obtain results
+ * like "01.123". */
+size_t
+strftime_msec(char *s, size_t max, const char *format,
+ const struct tm_msec *tm)
+{
+ size_t n;
+
+ n = strftime(s, max, format, &tm->tm);
+ if (n) {
+ char decimals[4];
+ char *p;
+
+ sprintf(decimals, "%03d", tm->msec);
+ for (p = strchr(s, '#'); p; p = strchr(p, '#')) {
+ char *d = decimals;
+ while (*p == '#') {
+ *p++ = *d ? *d++ : '0';
+ }
+ }
+ }
+
+ return n;
+}
+
+struct tm_msec *
+localtime_msec(long long int now, struct tm_msec *result)
+{
+ time_t now_sec = now / 1000;
+ localtime_r(&now_sec, &result->tm);
+ result->msec = now % 1000;
+ return result;
+}
+
+struct tm_msec *
+gmtime_msec(long long int now, struct tm_msec *result)
+{
+ time_t now_sec = now / 1000;
+ gmtime_r(&now_sec, &result->tm);
+ result->msec = now % 1000;
+ return result;
+}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff