/*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * 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.
#include <config.h>
#include "timeval.h"
-#include <assert.h>
#include <errno.h>
#include <poll.h>
#include <signal.h>
+#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include "coverage.h"
+#include "dummy.h"
+#include "dynamic-string.h"
#include "fatal-signal.h"
+#include "hash.h"
+#include "hmap.h"
+#include "ovs-thread.h"
+#include "signals.h"
+#include "unixctl.h"
#include "util.h"
-
#include "vlog.h"
-#define THIS_MODULE VLM_timeval
-/* Initialized? */
-static bool inited;
+/* 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
+#endif
+
+VLOG_DEFINE_THIS_MODULE(timeval);
+
+/* 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;
-/* Has a timer tick occurred? */
-static volatile sig_atomic_t tick;
+/* 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;
/* The current time, as of the last refresh. */
-static struct timeval now;
+static struct timespec wall_time;
+static struct timespec monotonic_time;
+
+/* 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. */
-/* Time at which to die with SIGALRM (if not TIME_MIN). */
-static time_t deadline = TIME_MIN;
+/* Time in milliseconds at which to die with SIGALRM (if not LLONG_MAX). */
+static long long int deadline = LLONG_MAX;
-static void setup_timer(void);
+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;
+};
+
+#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_if_ticked(void);
-static time_t time_add(time_t, time_t);
+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,
- const struct rusage *last_rusage);
+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();
+}
-/* Initializes the timetracking module. */
-void
+static char **
+backtrace_symbols(void *const *buffer OVS_UNUSED, int size OVS_UNUSED)
+{
+ NOT_REACHED();
+}
+#endif /* !USE_BACKTRACE */
+
+/* Initializes the timetracking module, if not already initialized. */
+static void
time_init(void)
{
- struct sigaction sa;
+ 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));
+ }
+
+ memset(traces, 0, sizeof traces);
+
+ if (USE_BACKTRACE && CACHE_TIME) {
+ unixctl_command_register("backtrace", "", 0, 0, backtrace_cb, NULL);
+ }
coverage_init();
- inited = true;
- gettimeofday(&now, NULL);
- tick = false;
+ 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();
+}
+
+static void
+set_up_signal(int flags)
+{
+ struct sigaction sa;
- /* Set up signal handler. */
memset(&sa, 0, sizeof sa);
sa.sa_handler = sigalrm_handler;
sigemptyset(&sa.sa_mask);
- sa.sa_flags = SA_RESTART;
- if (sigaction(SIGALRM, &sa, NULL)) {
- ovs_fatal(errno, "sigaction(SIGALRM) failed");
- }
-
- /* Set up periodic signal. */
- setup_timer();
+ sa.sa_flags = flags;
+ xsigaction(SIGALRM, &sa, NULL);
}
static void
-setup_timer(void)
+set_up_timer(void)
{
- struct itimerval itimer;
+ static timer_t timer_id; /* "static" to avoid apparent memory leak. */
+ struct itimerspec itimer;
+
+ if (!CACHE_TIME) {
+ return;
+ }
+
+ if (timer_create(monotonic_clock, NULL, &timer_id)) {
+ VLOG_FATAL("timer_create failed (%s)", strerror(errno));
+ }
itimer.it_interval.tv_sec = 0;
- itimer.it_interval.tv_usec = TIME_UPDATE_INTERVAL * 1000;
+ itimer.it_interval.tv_nsec = TIME_UPDATE_INTERVAL * 1000 * 1000;
itimer.it_value = itimer.it_interval;
- if (setitimer(ITIMER_REAL, &itimer, NULL)) {
- ovs_fatal(errno, "setitimer failed");
+
+ if (timer_settime(timer_id, 0, &itimer, NULL)) {
+ VLOG_FATAL("timer_settime failed (%s)", strerror(errno));
}
}
void
time_postfork(void)
{
- setup_timer();
+ time_init();
+ set_up_timer();
+}
+
+static void
+refresh_wall(void)
+{
+ time_init();
+ clock_gettime(CLOCK_REALTIME, &wall_time);
+ wall_tick = false;
+}
+
+static void
+refresh_monotonic(void)
+{
+ time_init();
+
+ if (!time_stopped) {
+ if (monotonic_clock == CLOCK_MONOTONIC) {
+ clock_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;
+ }
}
/* 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. */
+ * 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)
{
- gettimeofday(&now, NULL);
- tick = false;
+ wall_tick = monotonic_tick = true;
}
-/* Returns the current time, in seconds. */
+/* Returns a monotonic timer, in seconds. */
time_t
time_now(void)
{
- refresh_if_ticked();
- return now.tv_sec;
+ refresh_monotonic_if_ticked();
+ return monotonic_time.tv_sec;
}
-/* Returns the current time, in ms (within TIME_UPDATE_INTERVAL ms). */
+/* Returns the current time, in seconds. */
+time_t
+time_wall(void)
+{
+ refresh_wall_if_ticked();
+ return wall_time.tv_sec;
+}
+
+/* Returns a monotonic timer, in ms (within TIME_UPDATE_INTERVAL ms). */
long long int
time_msec(void)
{
- refresh_if_ticked();
- return timeval_to_msec(&now);
+ refresh_monotonic_if_ticked();
+ return timespec_to_msec(&monotonic_time);
+}
+
+/* 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
- * '*tv'. */
+ * '*ts'. */
void
-time_timeval(struct timeval *tv)
+time_wall_timespec(struct timespec *ts)
{
- refresh_if_ticked();
- *tv = now;
+ refresh_wall_if_ticked();
+ *ts = wall_time;
}
/* Configures the program to die with SIGALRM 'secs' seconds from now, if
void
time_alarm(unsigned int secs)
{
- sigset_t oldsigs;
+ long long int now;
+ long long int msecs;
+ assert_single_threaded();
time_init();
- block_sigalrm(&oldsigs);
- deadline = secs ? time_add(time_now(), secs) : TIME_MIN;
- unblock_sigalrm(&oldsigs);
+ time_refresh();
+
+ now = time_msec();
+ msecs = secs * 1000LL;
+ deadline = now < LLONG_MAX - msecs ? now + msecs : LLONG_MAX;
}
/* Like poll(), except:
+ *
+ * - The timeout is specified as an absolute time, as defined by
+ * time_msec(), instead of a duration.
*
* - On error, returns a negative error code (instead of setting errno).
*
* - If interrupted by a signal, retries automatically until the original
- * 'timeout' expires. (Because of this property, this function will
+ * 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, int timeout)
+time_poll(struct pollfd *pollfds, int n_pollfds, long long int timeout_when,
+ int *elapsed)
{
- static long long int last_wakeup;
- static struct rusage last_rusage;
+ static long long int last_wakeup = 0;
long long int start;
sigset_t oldsigs;
bool blocked;
int retval;
time_refresh();
- log_poll_interval(last_wakeup, &last_rusage);
+ if (last_wakeup) {
+ log_poll_interval(last_wakeup);
+ }
coverage_clear();
start = time_msec();
blocked = false;
+
+ timeout_when = MIN(timeout_when, deadline);
+
for (;;) {
+ long long int now = time_msec();
int time_left;
- if (timeout > 0) {
- long long int elapsed = time_msec() - start;
- time_left = timeout >= elapsed ? timeout - elapsed : 0;
+
+ if (now >= timeout_when) {
+ time_left = 0;
+ } else if ((unsigned long long int) timeout_when - now > INT_MAX) {
+ time_left = INT_MAX;
} else {
- time_left = timeout;
+ time_left = timeout_when - now;
}
retval = poll(pollfds, n_pollfds, time_left);
if (retval < 0) {
retval = -errno;
}
+
time_refresh();
+ if (deadline <= time_msec()) {
+ fatal_signal_handler(SIGALRM);
+ if (retval < 0) {
+ retval = 0;
+ }
+ break;
+ }
+
if (retval != -EINTR) {
break;
}
- if (!blocked && deadline == TIME_MIN) {
+ if (!blocked && CACHE_TIME) {
block_sigalrm(&oldsigs);
blocked = true;
}
unblock_sigalrm(&oldsigs);
}
last_wakeup = time_msec();
- getrusage(RUSAGE_SELF, &last_rusage);
+ refresh_rusage();
+ *elapsed = last_wakeup - start;
return retval;
}
-/* Returns the sum of 'a' and 'b', with saturation on overflow or underflow. */
-static time_t
-time_add(time_t a, time_t b)
+static void
+sigalrm_handler(int sig_nr OVS_UNUSED)
{
- return (a >= 0
- ? (b > TIME_MAX - a ? TIME_MAX : a + b)
- : (b < TIME_MIN - a ? TIME_MIN : a + b));
+ 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
-sigalrm_handler(int sig_nr)
+refresh_wall_if_ticked(void)
{
- tick = true;
- if (deadline != TIME_MIN && time(0) > deadline) {
- fatal_signal_handler(sig_nr);
+ if (!CACHE_TIME || wall_tick) {
+ refresh_wall();
}
}
static void
-refresh_if_ticked(void)
+refresh_monotonic_if_ticked(void)
{
- assert(inited);
- if (tick) {
- time_refresh();
+ if (!CACHE_TIME || monotonic_tick) {
+ refresh_monotonic();
}
}
sigset_t sigalrm;
sigemptyset(&sigalrm);
sigaddset(&sigalrm, SIGALRM);
- if (sigprocmask(SIG_BLOCK, &sigalrm, oldsigs)) {
- ovs_fatal(errno, "sigprocmask");
- }
+ xpthread_sigmask(SIG_BLOCK, &sigalrm, oldsigs);
}
static void
unblock_sigalrm(const sigset_t *oldsigs)
{
- if (sigprocmask(SIG_SETMASK, oldsigs, NULL)) {
- ovs_fatal(errno, "sigprocmask");
- }
+ xpthread_sigmask(SIG_SETMASK, oldsigs, NULL);
+}
+
+long long int
+timespec_to_msec(const struct timespec *ts)
+{
+ return (long long int) ts->tv_sec * 1000 + ts->tv_nsec / (1000 * 1000);
}
long long int
return (long long int) tv->tv_sec * 1000 + tv->tv_usec / 1000;
}
+/* Returns the monotonic time at which the "time" module was initialized, in
+ * milliseconds(). */
+long long int
+time_boot_msec(void)
+{
+ time_init();
+ return boot_time;
+}
+
+void
+xgettimeofday(struct timeval *tv)
+{
+ if (gettimeofday(tv, NULL) == -1) {
+ VLOG_FATAL("gettimeofday failed (%s)", strerror(errno));
+ }
+}
+
static long long int
timeval_diff_msec(const struct timeval *a, const struct timeval *b)
{
}
static void
-log_poll_interval(long long int last_wakeup, const struct rusage *last_rusage)
+timespec_add(struct timespec *sum,
+ const struct timespec *a,
+ const struct timespec *b)
{
- static unsigned int mean_interval; /* In 16ths of a millisecond. */
- static unsigned int n_samples;
+ struct timespec tmp;
- long long int now;
- unsigned int interval; /* In 16ths of a millisecond. */
+ tmp.tv_sec = a->tv_sec + b->tv_sec;
+ tmp.tv_nsec = a->tv_nsec + b->tv_nsec;
+ if (tmp.tv_nsec >= 1000 * 1000 * 1000) {
+ tmp.tv_nsec -= 1000 * 1000 * 1000;
+ tmp.tv_sec++;
+ }
- /* Compute interval from last wakeup to now in 16ths of a millisecond,
- * capped at 10 seconds (16000 in this unit). */
- now = time_msec();
- interval = MIN(10000, now - last_wakeup) << 4;
+ *sum = tmp;
+}
+
+static void
+log_poll_interval(long long int last_wakeup)
+{
+ long long int interval = time_msec() - last_wakeup;
- /* Warn if we took too much time between polls. */
- if (n_samples > 10 && interval > mean_interval * 8) {
+ if (interval >= 1000 && !warp_offset.tv_sec && !warp_offset.tv_nsec) {
+ const struct rusage *last_rusage = get_recent_rusage();
struct rusage rusage;
getrusage(RUSAGE_SELF, &rusage);
- VLOG_WARN("%u ms poll interval (%lld ms user, %lld ms system) "
- "is over %u times the weighted mean interval %u ms "
- "(%u samples)",
- (interval + 8) / 16,
- timeval_diff_msec(&rusage.ru_utime, &last_rusage->ru_utime),
- timeval_diff_msec(&rusage.ru_stime, &last_rusage->ru_stime),
- interval / mean_interval,
- (mean_interval + 8) / 16, n_samples);
+ VLOG_WARN("Unreasonably long %lldms poll interval"
+ " (%lldms user, %lldms system)",
+ interval,
+ timeval_diff_msec(&rusage.ru_utime,
+ &last_rusage->ru_utime),
+ timeval_diff_msec(&rusage.ru_stime,
+ &last_rusage->ru_stime));
if (rusage.ru_minflt > last_rusage->ru_minflt
|| rusage.ru_majflt > last_rusage->ru_majflt) {
VLOG_WARN("faults: %ld minor, %ld major",
rusage.ru_nvcsw - last_rusage->ru_nvcsw,
rusage.ru_nivcsw - last_rusage->ru_nivcsw);
}
+ coverage_log();
+ }
+}
+\f
+/* CPU usage tracking. */
- /* Care should be taken in the value chosen for logging. Depending
- * on the configuration, syslog can write changes synchronously,
- * which can cause the coverage messages to take longer to log
- * than the processing delay that triggered it. */
- coverage_log(VLL_INFO, true);
+struct cpu_usage {
+ long long int when; /* Time that this sample was taken. */
+ 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;
+
+static struct rusage *
+get_recent_rusage(void)
+{
+ return &recent_rusage;
+}
+
+static void
+refresh_rusage(void)
+{
+ long long int now;
+
+ 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;
+ }
}
+}
- /* Update exponentially weighted moving average. With these parameters, a
- * given value decays to 1% of its value in about 100 time steps. */
- if (n_samples++) {
- mean_interval = (mean_interval * 122 + interval * 6 + 64) / 128;
- } else {
- mean_interval = interval;
+/* Returns an estimate of this process's CPU usage, as a percentage, over the
+ * past few seconds of wall-clock time. Returns -1 if no estimate is available
+ * (which will happen if the process has not been running long enough to have
+ * an estimate, and can happen for other reasons as well). */
+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);
}
}
+\f
+/* Unixctl interface. */
+
+/* "time/stop" stops the monotonic time returned by e.g. time_msec() from
+ * advancing, except due to later calls to "time/warp". */
+static void
+timeval_stop_cb(struct unixctl_conn *conn,
+ int argc OVS_UNUSED, const char *argv[] OVS_UNUSED,
+ void *aux OVS_UNUSED)
+{
+ time_stopped = true;
+ unixctl_command_reply(conn, NULL);
+}
+
+/* "time/warp MSECS" advances the current monotonic time by the specified
+ * number of milliseconds. Unless "time/stop" has also been executed, the
+ * monotonic clock continues to tick forward at the normal rate afterward.
+ *
+ * Does not affect wall clock readings. */
+static void
+timeval_warp_cb(struct unixctl_conn *conn,
+ int argc OVS_UNUSED, const char *argv[], void *aux OVS_UNUSED)
+{
+ struct timespec ts;
+ int msecs;
+
+ msecs = atoi(argv[1]);
+ if (msecs <= 0) {
+ unixctl_command_reply_error(conn, "invalid MSECS");
+ return;
+ }
+
+ 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);
+}
+
+void
+timeval_dummy_register(void)
+{
+ unixctl_command_register("time/stop", "", 0, 0, timeval_stop_cb, NULL);
+ unixctl_command_register("time/warp", "MSECS", 1, 1,
+ timeval_warp_cb, NULL);
+}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff