*
*/
/*
- Copyright (C) 2000-2003 Kern Sibbald and John Walker
+ Copyright (C) 2003-2006 Kern Sibbald
This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of
- the License, or (at your option) any later version.
+ modify it under the terms of the GNU General Public License
+ version 2 as amended with additional clauses defined in the
+ file LICENSE in the main source directory.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public
- License along with this program; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ the file LICENSE for additional details.
*/
#include "bacula.h"
#include "dird.h"
-#ifdef JOB_QUEUE
+extern JCR *jobs;
/* Forward referenced functions */
-static void *jobq_server(void *arg);
-static int start_server(jobq_t *jq);
+extern "C" void *jobq_server(void *arg);
+extern "C" void *sched_wait(void *arg);
+
+static int start_server(jobq_t *jq);
+static bool acquire_resources(JCR *jcr);
+
+
-/*
+/*
* Initialize a job queue
*
* Returns: 0 on success
- * errno on failure
+ * errno on failure
*/
int jobq_init(jobq_t *jq, int threads, void *(*engine)(void *arg))
{
int stat;
jobq_item_t *item = NULL;
-
+
if ((stat = pthread_attr_init(&jq->attr)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_attr_init: ERR=%s\n"), be.strerror(stat));
return stat;
}
if ((stat = pthread_attr_setdetachstate(&jq->attr, PTHREAD_CREATE_DETACHED)) != 0) {
return stat;
}
if ((stat = pthread_mutex_init(&jq->mutex, NULL)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_mutex_init: ERR=%s\n"), be.strerror(stat));
pthread_attr_destroy(&jq->attr);
return stat;
}
if ((stat = pthread_cond_init(&jq->work, NULL)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_cond_init: ERR=%s\n"), be.strerror(stat));
pthread_mutex_destroy(&jq->mutex);
pthread_attr_destroy(&jq->attr);
return stat;
}
jq->quit = false;
- jq->max_workers = threads; /* max threads to create */
- jq->num_workers = 0; /* no threads yet */
- jq->idle_workers = 0; /* no idle threads */
- jq->engine = engine; /* routine to run */
- jq->valid = JOBQ_VALID;
+ jq->max_workers = threads; /* max threads to create */
+ jq->num_workers = 0; /* no threads yet */
+ jq->idle_workers = 0; /* no idle threads */
+ jq->engine = engine; /* routine to run */
+ jq->valid = JOBQ_VALID;
/* Initialize the job queues */
- jq->waiting_jobs = new dlist(item, &item->link);
- jq->running_jobs = new dlist(item, &item->link);
- jq->ready_jobs = new dlist(item, &item->link);
+ jq->waiting_jobs = New(dlist(item, &item->link));
+ jq->running_jobs = New(dlist(item, &item->link));
+ jq->ready_jobs = New(dlist(item, &item->link));
return 0;
}
* Destroy the job queue
*
* Returns: 0 on success
- * errno on failure
+ * errno on failure
*/
int jobq_destroy(jobq_t *jq)
{
int stat, stat1, stat2;
- if (jq->valid != JOBQ_VALID) {
- return EINVAL;
- }
- if ((stat = pthread_mutex_lock(&jq->mutex)) != 0) {
- return stat;
- }
- jq->valid = 0; /* prevent any more operations */
-
- /*
- * If any threads are active, wake them
- */
- if (jq->num_workers > 0) {
- jq->quit = true;
- if (jq->idle_workers) {
- if ((stat = pthread_cond_broadcast(&jq->work)) != 0) {
- pthread_mutex_unlock(&jq->mutex);
- return stat;
- }
- }
- while (jq->num_workers > 0) {
- if ((stat = pthread_cond_wait(&jq->work, &jq->mutex)) != 0) {
- pthread_mutex_unlock(&jq->mutex);
- return stat;
- }
- }
- }
- if ((stat = pthread_mutex_unlock(&jq->mutex)) != 0) {
- return stat;
- }
- stat = pthread_mutex_destroy(&jq->mutex);
- stat1 = pthread_cond_destroy(&jq->work);
- stat2 = pthread_attr_destroy(&jq->attr);
- delete jq->waiting_jobs;
- delete jq->running_jobs;
- delete jq->ready_jobs;
- return (stat != 0 ? stat : (stat1 != 0 ? stat1 : stat2));
+ if (jq->valid != JOBQ_VALID) {
+ return EINVAL;
+ }
+ if ((stat = pthread_mutex_lock(&jq->mutex)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_mutex_lock: ERR=%s\n"), be.strerror(stat));
+ return stat;
+ }
+ jq->valid = 0; /* prevent any more operations */
+
+ /*
+ * If any threads are active, wake them
+ */
+ if (jq->num_workers > 0) {
+ jq->quit = true;
+ if (jq->idle_workers) {
+ if ((stat = pthread_cond_broadcast(&jq->work)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_cond_broadcast: ERR=%s\n"), be.strerror(stat));
+ pthread_mutex_unlock(&jq->mutex);
+ return stat;
+ }
+ }
+ while (jq->num_workers > 0) {
+ if ((stat = pthread_cond_wait(&jq->work, &jq->mutex)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_cond_wait: ERR=%s\n"), be.strerror(stat));
+ pthread_mutex_unlock(&jq->mutex);
+ return stat;
+ }
+ }
+ }
+ if ((stat = pthread_mutex_unlock(&jq->mutex)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_mutex_unlock: ERR=%s\n"), be.strerror(stat));
+ return stat;
+ }
+ stat = pthread_mutex_destroy(&jq->mutex);
+ stat1 = pthread_cond_destroy(&jq->work);
+ stat2 = pthread_attr_destroy(&jq->attr);
+ delete jq->waiting_jobs;
+ delete jq->running_jobs;
+ delete jq->ready_jobs;
+ return (stat != 0 ? stat : (stat1 != 0 ? stat1 : stat2));
}
struct wait_pkt {
};
/*
- * Wait until schedule time arrives before starting
+ * Wait until schedule time arrives before starting. Normally
+ * this routine is only used for jobs started from the console
+ * for which the user explicitly specified a start time. Otherwise
+ * most jobs are put into the job queue only when their
+ * scheduled time arives.
*/
-static void *sched_wait(void *arg)
+extern "C"
+void *sched_wait(void *arg)
{
JCR *jcr = ((wait_pkt *)arg)->jcr;
jobq_t *jq = ((wait_pkt *)arg)->jq;
- Dmsg0(100, "Enter sched_wait.\n");
+ Dmsg0(2300, "Enter sched_wait.\n");
free(arg);
time_t wtime = jcr->sched_time - time(NULL);
+ set_jcr_job_status(jcr, JS_WaitStartTime);
/* Wait until scheduled time arrives */
- if (wtime > 0 && verbose) {
- Jmsg(jcr, M_INFO, 0, _("Job %s waiting %d seconds for scheduled start time.\n"),
- jcr->Job, wtime);
- set_jcr_job_status(jcr, JS_WaitStartTime);
+ if (wtime > 0) {
+ Jmsg(jcr, M_INFO, 0, _("Job %s waiting %d seconds for scheduled start time.\n"),
+ jcr->Job, wtime);
}
- /* Check every 30 seconds if canceled */
+ /* Check every 30 seconds if canceled */
while (wtime > 0) {
- Dmsg2(100, "Waiting on sched time, jobid=%d secs=%d\n", jcr->JobId, wtime);
+ Dmsg3(2300, "Waiting on sched time, jobid=%d secs=%d use=%d\n",
+ jcr->JobId, wtime, jcr->use_count());
if (wtime > 30) {
- wtime = 30;
+ wtime = 30;
}
bmicrosleep(wtime, 0);
if (job_canceled(jcr)) {
- break;
+ break;
}
wtime = jcr->sched_time - time(NULL);
}
+ Dmsg1(200, "resched use=%d\n", jcr->use_count());
jobq_add(jq, jcr);
- Dmsg0(100, "Exit sched_wait\n");
+ free_jcr(jcr); /* we are done with jcr */
+ Dmsg0(2300, "Exit sched_wait\n");
return NULL;
}
-
/*
* Add a job to the queue
* jq is a queue that was created with jobq_init
- *
*/
int jobq_add(jobq_t *jq, JCR *jcr)
{
time_t wtime = jcr->sched_time - time(NULL);
pthread_t id;
wait_pkt *sched_pkt;
-
-
- Dmsg0(100, "jobq_add\n");
+
+ Dmsg3(2300, "jobq_add jobid=%d jcr=0x%x use_count=%d\n", jcr->JobId, jcr, jcr->use_count());
if (jq->valid != JOBQ_VALID) {
+ Jmsg0(jcr, M_ERROR, 0, "Jobq_add queue not initialized.\n");
return EINVAL;
}
+ jcr->inc_use_count(); /* mark jcr in use by us */
+ Dmsg3(2300, "jobq_add jobid=%d jcr=0x%x use_count=%d\n", jcr->JobId, jcr, jcr->use_count());
if (!job_canceled(jcr) && wtime > 0) {
set_thread_concurrency(jq->max_workers + 2);
sched_pkt = (wait_pkt *)malloc(sizeof(wait_pkt));
sched_pkt->jcr = jcr;
sched_pkt->jq = jq;
- if ((stat = pthread_create(&id, &jq->attr, sched_wait, (void *)sched_pkt)) != 0) {
- return stat;
+ stat = pthread_create(&id, &jq->attr, sched_wait, (void *)sched_pkt);
+ if (stat != 0) { /* thread not created */
+ berrno be;
+ Jmsg1(jcr, M_ERROR, 0, _("pthread_thread_create: ERR=%s\n"), be.strerror(stat));
}
+ return stat;
}
if ((stat = pthread_mutex_lock(&jq->mutex)) != 0) {
+ berrno be;
+ Jmsg1(jcr, M_ERROR, 0, _("pthread_mutex_lock: ERR=%s\n"), be.strerror(stat));
+ free_jcr(jcr); /* release jcr */
return stat;
}
if ((item = (jobq_item_t *)malloc(sizeof(jobq_item_t))) == NULL) {
+ free_jcr(jcr); /* release jcr */
return ENOMEM;
}
item->jcr = jcr;
- Dmsg1(100, "add 0x%x to queue\n", (unsigned)item);
if (job_canceled(jcr)) {
/* Add job to ready queue so that it is canceled quickly */
jq->ready_jobs->prepend(item);
+ Dmsg1(2300, "Prepended job=%d to ready queue\n", jcr->JobId);
} else {
/* Add this job to the wait queue in priority sorted order */
- for (li=NULL; (li=(jobq_item_t *)jq->waiting_jobs->next(li)); ) {
- if (li->jcr->JobPriority < jcr->JobPriority) {
- jq->waiting_jobs->insert_before(item, li);
- Dmsg1(100, "insert_before 0x%x\n", (unsigned)li);
- inserted = true;
- }
+ foreach_dlist(li, jq->waiting_jobs) {
+ Dmsg2(2300, "waiting item jobid=%d priority=%d\n",
+ li->jcr->JobId, li->jcr->JobPriority);
+ if (li->jcr->JobPriority > jcr->JobPriority) {
+ jq->waiting_jobs->insert_before(item, li);
+ Dmsg2(2300, "insert_before jobid=%d before waiting job=%d\n",
+ li->jcr->JobId, jcr->JobId);
+ inserted = true;
+ break;
+ }
}
/* If not jobs in wait queue, append it */
if (!inserted) {
- jq->waiting_jobs->append(item);
- Dmsg0(100, "Appended item.\n");
+ jq->waiting_jobs->append(item);
+ Dmsg1(2300, "Appended item jobid=%d to waiting queue\n", jcr->JobId);
}
- Dmsg1(100, "Next=0x%x\n", (unsigned)jq->waiting_jobs->next(item));
}
+ /* Ensure that at least one server looks at the queue. */
stat = start_server(jq);
- if (stat == 0) {
- pthread_mutex_unlock(&jq->mutex);
- }
- Dmsg0(100, "Return jobq_add\n");
+ pthread_mutex_unlock(&jq->mutex);
+ Dmsg0(2300, "Return jobq_add\n");
return stat;
}
/*
- * Remove a job from the job queue
+ * Remove a job from the job queue. Used only by cancel_job().
* jq is a queue that was created with jobq_init
* work_item is an element of work
*
- * Note, it is "removed" by immediately calling a processing routine.
- * if you want to cancel it, you need to provide some external means
- * of doing so.
+ * Note, it is "removed" from the job queue.
+ * If you want to cancel it, you need to provide some external means
+ * of doing so (e.g. pthread_kill()).
*/
int jobq_remove(jobq_t *jq, JCR *jcr)
{
int stat;
bool found = false;
- pthread_t id;
jobq_item_t *item;
-
- Dmsg0(100, "jobq_remove\n");
+
+ Dmsg2(2300, "jobq_remove jobid=%d jcr=0x%x\n", jcr->JobId, jcr);
if (jq->valid != JOBQ_VALID) {
return EINVAL;
}
if ((stat = pthread_mutex_lock(&jq->mutex)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_mutex_lock: ERR=%s\n"), be.strerror(stat));
return stat;
}
- for (item=NULL; (item=(jobq_item_t *)jq->waiting_jobs->next(item)); ) {
+ foreach_dlist(item, jq->waiting_jobs) {
if (jcr == item->jcr) {
- found = true;
- break;
+ found = true;
+ break;
}
}
if (!found) {
+ pthread_mutex_unlock(&jq->mutex);
+ Dmsg2(2300, "jobq_remove jobid=%d jcr=0x%x not in wait queue\n", jcr->JobId, jcr);
return EINVAL;
}
/* Move item to be the first on the list */
jq->waiting_jobs->remove(item);
jq->ready_jobs->prepend(item);
-
- /* if any threads are idle, wake one */
- if (jq->idle_workers > 0) {
- Dmsg0(100, "Signal worker\n");
- if ((stat = pthread_cond_signal(&jq->work)) != 0) {
- pthread_mutex_unlock(&jq->mutex);
- return stat;
- }
- } else {
- Dmsg0(100, "Create worker thread\n");
- /* No idle threads so create a new one */
- set_thread_concurrency(jq->max_workers + 1);
- if ((stat = pthread_create(&id, &jq->attr, jobq_server, (void *)jq)) != 0) {
- pthread_mutex_unlock(&jq->mutex);
- return stat;
- }
- jq->num_workers++;
- }
+ Dmsg2(2300, "jobq_remove jobid=%d jcr=0x%x moved to ready queue\n", jcr->JobId, jcr);
+
+ stat = start_server(jq);
+
pthread_mutex_unlock(&jq->mutex);
- Dmsg0(100, "Return jobq_remove\n");
+ Dmsg0(2300, "Return jobq_remove\n");
return stat;
}
/*
- * Start the server thread
+ * Start the server thread if it isn't already running
*/
static int start_server(jobq_t *jq)
{
int stat = 0;
pthread_t id;
- /* if any threads are idle, wake one */
+ /*
+ * if any threads are idle, wake one --
+ * actually we do a broadcast because on /lib/tls
+ * these signals seem to get lost from time to time.
+ */
if (jq->idle_workers > 0) {
- Dmsg0(100, "Signal worker\n");
- if ((stat = pthread_cond_signal(&jq->work)) != 0) {
- pthread_mutex_unlock(&jq->mutex);
- return stat;
+ Dmsg0(2300, "Signal worker to wake up\n");
+ if ((stat = pthread_cond_broadcast(&jq->work)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_cond_signal: ERR=%s\n"), be.strerror(stat));
+ return stat;
}
} else if (jq->num_workers < jq->max_workers) {
- Dmsg0(100, "Create worker thread\n");
+ Dmsg0(2300, "Create worker thread\n");
/* No idle threads so create a new one */
set_thread_concurrency(jq->max_workers + 1);
if ((stat = pthread_create(&id, &jq->attr, jobq_server, (void *)jq)) != 0) {
- pthread_mutex_unlock(&jq->mutex);
- return stat;
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_create: ERR=%s\n"), be.strerror(stat));
+ return stat;
}
- jq->num_workers++;
}
return stat;
}
-/*
+/*
* This is the worker thread that serves the job queue.
- * When all the resources are acquired for the job,
+ * When all the resources are acquired for the job,
* it will call the user's engine.
*/
-static void *jobq_server(void *arg)
+extern "C"
+void *jobq_server(void *arg)
{
struct timespec timeout;
jobq_t *jq = (jobq_t *)arg;
- jobq_item_t *je; /* job entry in queue */
+ jobq_item_t *je; /* job entry in queue */
int stat;
- bool timedout;
+ bool timedout = false;
+ bool work = true;
- Dmsg0(100, "Start jobq_server\n");
+ Dmsg0(2300, "Start jobq_server\n");
if ((stat = pthread_mutex_lock(&jq->mutex)) != 0) {
+ berrno be;
+ Jmsg1(NULL, M_ERROR, 0, _("pthread_mutex_lock: ERR=%s\n"), be.strerror(stat));
return NULL;
}
+ jq->num_workers++;
for (;;) {
struct timeval tv;
struct timezone tz;
- Dmsg0(100, "Top of for loop\n");
- timedout = false;
- Dmsg0(100, "gettimeofday()\n");
- gettimeofday(&tv, &tz);
- timeout.tv_nsec = 0;
- timeout.tv_sec = tv.tv_sec + 4;
-
- while (jq->waiting_jobs->empty() && jq->ready_jobs->empty() && !jq->quit) {
- /*
- * Wait 4 seconds, then if no more work, exit
- */
- Dmsg0(100, "pthread_cond_timedwait()\n");
- stat = pthread_cond_timedwait(&jq->work, &jq->mutex, &timeout);
- Dmsg1(100, "timedwait=%d\n", stat);
- if (stat == ETIMEDOUT) {
- timedout = true;
- break;
- } else if (stat != 0) {
- /* This shouldn't happen */
- Dmsg0(100, "This shouldn't happen\n");
- jq->num_workers--;
- pthread_mutex_unlock(&jq->mutex);
- return NULL;
- }
- }
- /*
+ Dmsg0(2300, "Top of for loop\n");
+ if (!work && !jq->quit) {
+ gettimeofday(&tv, &tz);
+ timeout.tv_nsec = 0;
+ timeout.tv_sec = tv.tv_sec + 4;
+
+ while (!jq->quit) {
+ /*
+ * Wait 4 seconds, then if no more work, exit
+ */
+ Dmsg0(2300, "pthread_cond_timedwait()\n");
+ stat = pthread_cond_timedwait(&jq->work, &jq->mutex, &timeout);
+ if (stat == ETIMEDOUT) {
+ Dmsg0(2300, "timedwait timedout.\n");
+ timedout = true;
+ break;
+ } else if (stat != 0) {
+ /* This shouldn't happen */
+ Dmsg0(2300, "This shouldn't happen\n");
+ jq->num_workers--;
+ pthread_mutex_unlock(&jq->mutex);
+ return NULL;
+ }
+ break;
+ }
+ }
+ /*
* If anything is in the ready queue, run it
*/
- Dmsg0(100, "Checking ready queue.\n");
+ Dmsg0(2300, "Checking ready queue.\n");
while (!jq->ready_jobs->empty() && !jq->quit) {
- je = (jobq_item_t *)jq->ready_jobs->first();
- jq->ready_jobs->remove(je);
- if (!jq->ready_jobs->empty()) {
- if (start_server(jq) != 0) {
- return NULL;
- }
- }
- jq->running_jobs->append(je);
- if ((stat = pthread_mutex_unlock(&jq->mutex)) != 0) {
- return NULL;
- }
+ JCR *jcr;
+ je = (jobq_item_t *)jq->ready_jobs->first();
+ jcr = je->jcr;
+ jq->ready_jobs->remove(je);
+ if (!jq->ready_jobs->empty()) {
+ Dmsg0(2300, "ready queue not empty start server\n");
+ if (start_server(jq) != 0) {
+ jq->num_workers--;
+ pthread_mutex_unlock(&jq->mutex);
+ return NULL;
+ }
+ }
+ jq->running_jobs->append(je);
+ Dmsg1(2300, "Took jobid=%d from ready and appended to run\n", jcr->JobId);
+
+ /* Release job queue lock */
+ V(jq->mutex);
+
/* Call user's routine here */
- Dmsg0(100, "Calling user engine.\n");
- jq->engine(je->jcr);
- Dmsg0(100, "Back from user engine.\n");
- if ((stat = pthread_mutex_lock(&jq->mutex)) != 0) {
- free(je); /* release job entry */
- return NULL;
- }
- Dmsg0(100, "Done lock mutex\n");
- jq->running_jobs->remove(je);
- /*
- * Release locks if acquired. Note, they will not have
- * been acquired for jobs canceled before they were
- * put into the ready queue.
- */
- if (je->jcr->acquired_resource_locks) {
- je->jcr->store->NumConcurrentJobs--;
- je->jcr->client->NumConcurrentJobs--;
- je->jcr->job->NumConcurrentJobs--;
- }
- free_jcr(je->jcr);
- free(je); /* release job entry */
+ Dmsg2(2300, "Calling user engine for jobid=%d use=%d\n", jcr->JobId,
+ jcr->use_count());
+ jq->engine(je->jcr);
+
+ Dmsg2(2300, "Back from user engine jobid=%d use=%d.\n", jcr->JobId,
+ jcr->use_count());
+
+ /* Reacquire job queue lock */
+ P(jq->mutex);
+ Dmsg0(200, "Done lock mutex after running job. Release locks.\n");
+ jq->running_jobs->remove(je);
+ /*
+ * Release locks if acquired. Note, they will not have
+ * been acquired for jobs canceled before they were
+ * put into the ready queue.
+ */
+ if (jcr->acquired_resource_locks) {
+ jcr->store->NumConcurrentJobs--;
+ jcr->client->NumConcurrentJobs--;
+ jcr->job->NumConcurrentJobs--;
+ }
+
+ /*
+ * Reschedule the job if necessary and requested
+ */
+ if (jcr->job->RescheduleOnError &&
+ jcr->JobStatus != JS_Terminated &&
+ jcr->JobStatus != JS_Canceled &&
+ jcr->job->RescheduleTimes > 0 &&
+ jcr->JobType == JT_BACKUP &&
+ jcr->reschedule_count < jcr->job->RescheduleTimes) {
+ char dt[50];
+
+ /*
+ * Reschedule this job by cleaning it up, but
+ * reuse the same JobId if possible.
+ */
+ jcr->reschedule_count++;
+ jcr->sched_time = time(NULL) + jcr->job->RescheduleInterval;
+ Dmsg2(2300, "Rescheduled Job %s to re-run in %d seconds.\n", jcr->Job,
+ (int)jcr->job->RescheduleInterval);
+ bstrftime(dt, sizeof(dt), time(NULL));
+ Jmsg(jcr, M_INFO, 0, _("Rescheduled Job %s at %s to re-run in %d seconds.\n"),
+ jcr->Job, dt, (int)jcr->job->RescheduleInterval);
+ dird_free_jcr_pointers(jcr); /* partial cleanup old stuff */
+ jcr->JobStatus = JS_WaitStartTime;
+ jcr->SDJobStatus = 0;
+ if (jcr->JobBytes == 0) {
+ Dmsg2(2300, "Requeue job=%d use=%d\n", jcr->JobId, jcr->use_count());
+ jcr->JobStatus = JS_WaitStartTime;
+ V(jq->mutex);
+ jobq_add(jq, jcr); /* queue the job to run again */
+ P(jq->mutex);
+ free_jcr(jcr); /* release jcr */
+ free(je); /* free the job entry */
+ continue; /* look for another job to run */
+ }
+ /*
+ * Something was actually backed up, so we cannot reuse
+ * the old JobId or there will be database record
+ * conflicts. We now create a new job, copying the
+ * appropriate fields.
+ */
+ JCR *njcr = new_jcr(sizeof(JCR), dird_free_jcr);
+ set_jcr_defaults(njcr, jcr->job);
+ njcr->reschedule_count = jcr->reschedule_count;
+ njcr->JobLevel = jcr->JobLevel;
+ njcr->JobStatus = jcr->JobStatus;
+ copy_storage(njcr, jcr);
+ njcr->messages = jcr->messages;
+ Dmsg0(2300, "Call to run new job\n");
+ V(jq->mutex);
+ run_job(njcr); /* This creates a "new" job */
+ free_jcr(njcr); /* release "new" jcr */
+ P(jq->mutex);
+ Dmsg0(2300, "Back from running new job.\n");
+ }
+ /* Clean up and release old jcr */
+ if (jcr->db) {
+ db_close_database(jcr, jcr->db);
+ jcr->db = NULL;
+ }
+ Dmsg2(2300, "====== Termination job=%d use_cnt=%d\n", jcr->JobId, jcr->use_count());
+ jcr->SDJobStatus = 0;
+ V(jq->mutex); /* release internal lock */
+ free_jcr(jcr);
+ free(je); /* release job entry */
+ P(jq->mutex); /* reacquire job queue lock */
}
/*
* If any job in the wait queue can be run,
* move it to the ready queue
*/
- Dmsg0(100, "Done check ready, now check wait queue.\n");
- while (!jq->waiting_jobs->empty() && !jq->quit) {
- int Priority;
- je = (jobq_item_t *)jq->waiting_jobs->first();
- jobq_item_t *re = (jobq_item_t *)jq->running_jobs->first();
- if (re) {
- Priority = re->jcr->JobPriority;
- Dmsg1(100, "Set Run pri=%d\n", Priority);
- } else {
- Priority = je->jcr->JobPriority;
- Dmsg1(100, "Set Job pri=%d\n", Priority);
- }
- /*
- * Acquire locks
- */
- for ( ; je; ) {
- JCR *jcr = je->jcr;
- jobq_item_t *jn = (jobq_item_t *)jq->waiting_jobs->next(je);
- Dmsg2(100, "je=0x%x jn=0x%x\n", (unsigned)je, (unsigned)jn);
- Dmsg3(100, "Examining Job=%d JobPri=%d want Pri=%d\n",
- jcr->JobId, jcr->JobPriority, Priority);
- /* Take only jobs of correct Priority */
- if (jcr->JobPriority != Priority) {
- set_jcr_job_status(jcr, JS_WaitPriority);
- break;
- }
- if (jcr->store->NumConcurrentJobs < jcr->store->MaxConcurrentJobs) {
- jcr->store->NumConcurrentJobs++;
- } else {
- set_jcr_job_status(jcr, JS_WaitStoreRes);
- je = jn;
- continue;
- }
- if (jcr->client->NumConcurrentJobs < jcr->client->MaxConcurrentJobs) {
- jcr->client->NumConcurrentJobs++;
- } else {
- jcr->store->NumConcurrentJobs--;
- set_jcr_job_status(jcr, JS_WaitClientRes);
- je = jn;
- continue;
- }
- if (jcr->job->NumConcurrentJobs < jcr->job->MaxConcurrentJobs) {
- jcr->job->NumConcurrentJobs++;
- } else {
- jcr->store->NumConcurrentJobs--;
- jcr->client->NumConcurrentJobs--;
- set_jcr_job_status(jcr, JS_WaitJobRes);
- je = jn;
- continue;
- }
- jcr->acquired_resource_locks = true;
- jq->waiting_jobs->remove(je);
- jq->ready_jobs->append(je);
- Dmsg1(100, "moved JobId=%d from wait to ready queue\n",
- je->jcr->JobId);
- je = jn;
- } /* end for loop */
- } /* end while loop */
- Dmsg0(100, "Done checking wait queue.\n");
+ Dmsg0(2300, "Done check ready, now check wait queue.\n");
+ if (!jq->waiting_jobs->empty() && !jq->quit) {
+ int Priority;
+ je = (jobq_item_t *)jq->waiting_jobs->first();
+ jobq_item_t *re = (jobq_item_t *)jq->running_jobs->first();
+ if (re) {
+ Priority = re->jcr->JobPriority;
+ Dmsg2(2300, "JobId %d is running. Look for pri=%d\n", re->jcr->JobId, Priority);
+ } else {
+ Priority = je->jcr->JobPriority;
+ Dmsg1(2300, "No job running. Look for Job pri=%d\n", Priority);
+ }
+ /*
+ * Walk down the list of waiting jobs and attempt
+ * to acquire the resources it needs.
+ */
+ for ( ; je; ) {
+ /* je is current job item on the queue, jn is the next one */
+ JCR *jcr = je->jcr;
+ jobq_item_t *jn = (jobq_item_t *)jq->waiting_jobs->next(je);
+
+ Dmsg3(2300, "Examining Job=%d JobPri=%d want Pri=%d\n",
+ jcr->JobId, jcr->JobPriority, Priority);
+
+ /* Take only jobs of correct Priority */
+ if (jcr->JobPriority != Priority) {
+ set_jcr_job_status(jcr, JS_WaitPriority);
+ break;
+ }
+
+ if (!acquire_resources(jcr)) {
+ je = jn; /* point to next waiting job */
+ continue;
+ }
+
+ /* Got all locks, now remove it from wait queue and append it
+ * to the ready queue
+ */
+ jcr->acquired_resource_locks = true;
+ jq->waiting_jobs->remove(je);
+ jq->ready_jobs->append(je);
+ Dmsg1(2300, "moved JobId=%d from wait to ready queue\n", je->jcr->JobId);
+ je = jn; /* Point to next waiting job */
+ } /* end for loop */
+
+ } /* end if */
+
+ Dmsg0(2300, "Done checking wait queue.\n");
/*
- * If no more work request, and we are asked to quit, then do it
+ * If no more ready work and we are asked to quit, then do it
*/
- if (jq->waiting_jobs->empty() && jq->ready_jobs->empty() && jq->quit) {
- jq->num_workers--;
- if (jq->num_workers == 0) {
- Dmsg0(100, "Wake up destroy routine\n");
- /* Wake up destroy routine if he is waiting */
- pthread_cond_broadcast(&jq->work);
- }
- break;
+ if (jq->ready_jobs->empty() && jq->quit) {
+ jq->num_workers--;
+ if (jq->num_workers == 0) {
+ Dmsg0(2300, "Wake up destroy routine\n");
+ /* Wake up destroy routine if he is waiting */
+ pthread_cond_broadcast(&jq->work);
+ }
+ break;
}
- Dmsg0(100, "Check for work request\n");
- /*
+ Dmsg0(2300, "Check for work request\n");
+ /*
* If no more work requests, and we waited long enough, quit
*/
- Dmsg1(100, "jq empty = %d\n", jq->waiting_jobs->empty());
- Dmsg1(100, "timedout=%d\n", timedout);
- if (jq->waiting_jobs->empty() && jq->ready_jobs->empty() && timedout) {
- Dmsg0(100, "break big loop\n");
- jq->num_workers--;
- break;
+ Dmsg2(2300, "timedout=%d read empty=%d\n", timedout,
+ jq->ready_jobs->empty());
+ if (jq->ready_jobs->empty() && timedout) {
+ Dmsg0(2300, "break big loop\n");
+ jq->num_workers--;
+ break;
}
- Dmsg0(100, "Loop again\n");
+
+ work = !jq->ready_jobs->empty() || !jq->waiting_jobs->empty();
+ if (work) {
+ /*
+ * If a job is waiting on a Resource, don't consume all
+ * the CPU time looping looking for work, and even more
+ * important, release the lock so that a job that has
+ * terminated can give us the resource.
+ */
+ V(jq->mutex);
+ bmicrosleep(2, 0); /* pause for 2 seconds */
+ P(jq->mutex);
+ /* Recompute work as something may have changed in last 2 secs */
+ work = !jq->ready_jobs->empty() || !jq->waiting_jobs->empty();
+ }
+ Dmsg1(2300, "Loop again. work=%d\n", work);
} /* end of big for loop */
- Dmsg0(100, "unlock mutex\n");
- pthread_mutex_unlock(&jq->mutex);
- Dmsg0(100, "End jobq_server\n");
+ Dmsg0(200, "unlock mutex\n");
+ V(jq->mutex);
+ Dmsg0(2300, "End jobq_server\n");
return NULL;
}
-#endif /* JOB_QUEUE */
+/*
+ * See if we can acquire all the necessary resources for the job (JCR)
+ *
+ * Returns: true if successful
+ * false if resource failure
+ */
+static bool acquire_resources(JCR *jcr)
+{
+ bool skip_this_jcr = false;
+
+ if (jcr->JobType == JT_RESTORE || jcr->JobType == JT_VERIFY) {
+ /*
+ * Let only one Restore/verify job run at a time regardless
+ * of MaxConcurrentJobs.
+ */
+ if (jcr->store->NumConcurrentJobs == 0) {
+ jcr->store->NumConcurrentJobs = 1;
+ } else {
+ set_jcr_job_status(jcr, JS_WaitStoreRes);
+ return false;
+ }
+ /* We are not doing a Restore or Verify */
+ } else if (jcr->store->NumConcurrentJobs == 0 &&
+ jcr->store->NumConcurrentJobs < jcr->store->MaxConcurrentJobs) {
+ /* Simple case, first job */
+ jcr->store->NumConcurrentJobs = 1;
+ } else if (jcr->store->NumConcurrentJobs < jcr->store->MaxConcurrentJobs) {
+ jcr->store->NumConcurrentJobs++;
+ } else {
+ skip_this_jcr = true;
+ }
+ if (skip_this_jcr) {
+ set_jcr_job_status(jcr, JS_WaitStoreRes);
+ return false;
+ }
+
+ if (jcr->client->NumConcurrentJobs < jcr->client->MaxConcurrentJobs) {
+ jcr->client->NumConcurrentJobs++;
+ } else {
+ /* Back out previous locks */
+ jcr->store->NumConcurrentJobs--;
+ set_jcr_job_status(jcr, JS_WaitClientRes);
+ return false;
+ }
+ if (jcr->job->NumConcurrentJobs < jcr->job->MaxConcurrentJobs) {
+ jcr->job->NumConcurrentJobs++;
+ } else {
+ /* Back out previous locks */
+ jcr->store->NumConcurrentJobs--;
+ jcr->client->NumConcurrentJobs--;
+ set_jcr_job_status(jcr, JS_WaitJobRes);
+ return false;
+ }
+ /* Check actual device availability */
+ /* ***FIXME****/
+ return true;
+}
projects / bacula / bacula / blobdiff