/*
* Copyright (c) 2008, 2009 Nicira Networks.
*
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
*
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
*/
#include <config.h>
/* Time at which to die with SIGALRM (if not TIME_MIN). */
static time_t deadline = TIME_MIN;
+static void set_up_timer(void);
static void sigalrm_handler(int);
static void refresh_if_ticked(void);
static time_t time_add(time_t, time_t);
time_init(void)
{
struct sigaction sa;
- struct itimerval itimer;
-
if (inited) {
return;
}
+ coverage_init();
+
inited = true;
gettimeofday(&now, NULL);
tick = false;
ovs_fatal(errno, "sigaction(SIGALRM) failed");
}
- /* Set up periodic timer. */
+ /* Set up periodic signal. */
+ set_up_timer();
+}
+
+static void
+set_up_timer(void)
+{
+ struct itimerval itimer;
+
itimer.it_interval.tv_sec = 0;
itimer.it_interval.tv_usec = TIME_UPDATE_INTERVAL * 1000;
itimer.it_value = itimer.it_interval;
}
}
+/* 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(). */
+void
+time_postfork(void)
+{
+ set_up_timer();
+}
+
/* 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. */
rusage.ru_nvcsw - last_rusage->ru_nvcsw,
rusage.ru_nivcsw - last_rusage->ru_nivcsw);
}
- coverage_log(VLL_WARN);
+
+ /* 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);
}
/* Update exponentially weighted moving average. With these parameters, a