External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-12-23 06:05:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

Refactor job statistics

Browse Source 
Job statistics data were tracked in several structures and variables.
Let's make a new qemuDomainJobInfo structure which can be used as a
single source of statistics data as a preparation for storing data about
completed a job.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Jiri Denemark 2014-08-21 15:08:39 +02:00
parent 10af1f23f0
commit 6fcddfcd8f
4 changed files with 219 additions and 161 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

157
src/qemu/qemu_domain.c
View File

@ -163,11 +163,9 @@ qemuDomainObjResetAsyncJob(qemuDomainObjPrivatePtr priv)
job->asyncOwner = 0;
job->phase = 0;
job->mask = QEMU_JOB_DEFAULT_MASK;
job->start = 0;
job->dump_memory_only = false;
job->asyncAbort = false;
memset(&job->status, 0, sizeof(job->status));
memset(&job->info, 0, sizeof(job->info));
VIR_FREE(job->current);
}
void
@ -200,6 +198,7 @@ qemuDomainObjTransferJob(virDomainObjPtr obj)
static void
qemuDomainObjFreeJob(qemuDomainObjPrivatePtr priv)
{
VIR_FREE(priv->job.current);
virCondDestroy(&priv->job.cond);
virCondDestroy(&priv->job.asyncCond);
}
@ -211,6 +210,150 @@ qemuDomainTrackJob(qemuDomainJob job)
}
int
qemuDomainJobInfoUpdateTime(qemuDomainJobInfoPtr jobInfo)
{
unsigned long long now;
if (!jobInfo->started)
return 0;
if (virTimeMillisNow(&now) < 0)
return -1;
jobInfo->timeElapsed = now - jobInfo->started;
return 0;
}
int
qemuDomainJobInfoToInfo(qemuDomainJobInfoPtr jobInfo,
virDomainJobInfoPtr info)
{
info->timeElapsed = jobInfo->timeElapsed;
info->timeRemaining = jobInfo->timeRemaining;
info->memTotal = jobInfo->status.ram_total;
info->memRemaining = jobInfo->status.ram_remaining;
info->memProcessed = jobInfo->status.ram_transferred;
info->fileTotal = jobInfo->status.disk_total;
info->fileRemaining = jobInfo->status.disk_remaining;
info->fileProcessed = jobInfo->status.disk_transferred;
info->dataTotal = info->memTotal + info->fileTotal;
info->dataRemaining = info->memRemaining + info->fileRemaining;
info->dataProcessed = info->memProcessed + info->fileProcessed;
return 0;
}
int
qemuDomainJobInfoToParams(qemuDomainJobInfoPtr jobInfo,
int *type,
virTypedParameterPtr *params,
int *nparams)
{
qemuMonitorMigrationStatus *status = &jobInfo->status;
virTypedParameterPtr par = NULL;
int maxpar = 0;
int npar = 0;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_TIME_ELAPSED,
jobInfo->timeElapsed) < 0)
goto error;
if (jobInfo->type == VIR_DOMAIN_JOB_BOUNDED &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_TIME_REMAINING,
jobInfo->timeRemaining) < 0)
goto error;
if (status->downtime_set &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DOWNTIME,
status->downtime) < 0)
goto error;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_TOTAL,
status->ram_total +
status->disk_total) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_PROCESSED,
status->ram_transferred +
status->disk_transferred) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_REMAINING,
status->ram_remaining +
status->disk_remaining) < 0)
goto error;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_TOTAL,
status->ram_total) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_PROCESSED,
status->ram_transferred) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_REMAINING,
status->ram_remaining) < 0)
goto error;
if (status->ram_duplicate_set) {
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_CONSTANT,
status->ram_duplicate) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_NORMAL,
status->ram_normal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_NORMAL_BYTES,
status->ram_normal_bytes) < 0)
goto error;
}
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_TOTAL,
status->disk_total) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_PROCESSED,
status->disk_transferred) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_REMAINING,
status->disk_remaining) < 0)
goto error;
if (status->xbzrle_set) {
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_CACHE,
status->xbzrle_cache_size) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_BYTES,
status->xbzrle_bytes) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_PAGES,
status->xbzrle_pages) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_CACHE_MISSES,
status->xbzrle_cache_miss) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_OVERFLOW,
status->xbzrle_overflow) < 0)
goto error;
}
*type = jobInfo->type;
*params = par;
*nparams = npar;
return 0;
error:
virTypedParamsFree(par, npar);
return -1;
}
static void *
qemuDomainObjPrivateAlloc(void)
{
@ -1071,7 +1214,7 @@ qemuDomainObjBeginJobInternal(virQEMUDriverPtr driver,
unsigned long long then;
bool nested = job == QEMU_JOB_ASYNC_NESTED;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
int ret;
int ret = -1;
VIR_DEBUG("Starting %s: %s (async=%s vm=%p name=%s)",
job == QEMU_JOB_ASYNC ? "async job" : "job",
@ -1127,9 +1270,11 @@ qemuDomainObjBeginJobInternal(virQEMUDriverPtr driver,
qemuDomainAsyncJobTypeToString(asyncJob),
obj, obj->def->name);
qemuDomainObjResetAsyncJob(priv);
if (VIR_ALLOC(priv->job.current) < 0)
goto cleanup;
priv->job.asyncJob = asyncJob;
priv->job.asyncOwner = virThreadSelfID();
priv->job.start = now;
priv->job.current->started = now;
}
if (qemuDomainTrackJob(job))
@ -1163,6 +1308,8 @@ qemuDomainObjBeginJobInternal(virQEMUDriverPtr driver,
virReportSystemError(errno,
"%s", _("cannot acquire job mutex"));
}
cleanup:
priv->jobs_queued--;
virObjectUnref(obj);
virObjectUnref(cfg);

28
src/qemu/qemu_domain.h
View File

@ -100,6 +100,18 @@ typedef enum {
} qemuDomainAsyncJob;
VIR_ENUM_DECL(qemuDomainAsyncJob)
typedef struct _qemuDomainJobInfo qemuDomainJobInfo;
typedef qemuDomainJobInfo *qemuDomainJobInfoPtr;
struct _qemuDomainJobInfo {
virDomainJobType type;
unsigned long long started; /* When the async job started */
/* Computed values */
unsigned long long timeElapsed;
unsigned long long timeRemaining;
/* Raw values from QEMU */
qemuMonitorMigrationStatus status;
};
struct qemuDomainJobObj {
virCond cond; /* Use to coordinate jobs */
qemuDomainJob active; /* Currently running job */
@ -110,10 +122,8 @@ struct qemuDomainJobObj {
unsigned long long asyncOwner; /* Thread which set current async job */
int phase; /* Job phase (mainly for migrations) */
unsigned long long mask; /* Jobs allowed during async job */
unsigned long long start; /* When the async job started */
bool dump_memory_only; /* use dump-guest-memory to do dump */
qemuMonitorMigrationStatus status; /* Raw async job progress data */
virDomainJobInfo info; /* Processed async job progress data */
qemuDomainJobInfoPtr current; /* async job progress data */
bool asyncAbort; /* abort of async job requested */
};
@ -378,4 +388,16 @@ bool qemuDomainDefCheckABIStability(virQEMUDriverPtr driver,
bool qemuDomainAgentAvailable(qemuDomainObjPrivatePtr priv,
bool reportError);
int qemuDomainJobInfoUpdateTime(qemuDomainJobInfoPtr jobInfo)
ATTRIBUTE_NONNULL(1);
int qemuDomainJobInfoToInfo(qemuDomainJobInfoPtr jobInfo,
virDomainJobInfoPtr info)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
int qemuDomainJobInfoToParams(qemuDomainJobInfoPtr jobInfo,
int *type,
virTypedParameterPtr *params,
int *nparams)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);
#endif /* __QEMU_DOMAIN_H__ */

119
src/qemu/qemu_driver.c
View File

@ -2655,15 +2655,13 @@ qemuDomainGetControlInfo(virDomainPtr dom,
if (priv->monError) {
info->state = VIR_DOMAIN_CONTROL_ERROR;
} else if (priv->job.active) {
if (!priv->monStart) {
if (virTimeMillisNow(&info->stateTime) < 0)
goto cleanup;
if (priv->job.current) {
info->state = VIR_DOMAIN_CONTROL_JOB;
if (virTimeMillisNow(&info->stateTime) < 0)
goto cleanup;
info->stateTime -= priv->job.start;
info->stateTime -= priv->job.current->started;
} else {
info->state = VIR_DOMAIN_CONTROL_OCCUPIED;
if (virTimeMillisNow(&info->stateTime) < 0)
goto cleanup;
info->stateTime -= priv->monStart;
}
} else {
@ -3110,8 +3108,7 @@ qemuDomainSaveInternal(virQEMUDriverPtr driver, virDomainPtr dom,
goto endjob;
}
memset(&priv->job.info, 0, sizeof(priv->job.info));
priv->job.info.type = VIR_DOMAIN_JOB_UNBOUNDED;
priv->job.current->type = VIR_DOMAIN_JOB_UNBOUNDED;
/* Pause */
if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
@ -3460,6 +3457,7 @@ static int qemuDumpToFd(virQEMUDriverPtr driver, virDomainObjPtr vm,
fd) < 0)
return -1;
VIR_FREE(priv->job.current);
priv->job.dump_memory_only = true;
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
@ -11616,17 +11614,15 @@ static int qemuDomainGetJobInfo(virDomainPtr dom,
goto cleanup;
if (virDomainObjIsActive(vm)) {
if (priv->job.asyncJob && !priv->job.dump_memory_only) {
memcpy(info, &priv->job.info, sizeof(*info));
if (priv->job.current) {
/* Refresh elapsed time again just to ensure it
* is fully updated. This is primarily for benefit
* of incoming migration which we don't currently
* monitor actively in the background thread
*/
if (virTimeMillisNow(&info->timeElapsed) < 0)
if (qemuDomainJobInfoUpdateTime(priv->job.current) < 0 ||
qemuDomainJobInfoToInfo(priv->job.current, info) < 0)
goto cleanup;
info->timeElapsed -= priv->job.start;
} else {
memset(info, 0, sizeof(*info));
info->type = VIR_DOMAIN_JOB_NONE;
@ -11655,9 +11651,6 @@ qemuDomainGetJobStats(virDomainPtr dom,
{
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
virTypedParameterPtr par = NULL;
int maxpar = 0;
int npar = 0;
int ret = -1;
virCheckFlags(0, -1);
@ -11676,7 +11669,7 @@ qemuDomainGetJobStats(virDomainPtr dom,
goto cleanup;
}
if (!priv->job.asyncJob || priv->job.dump_memory_only) {
if (!priv->job.current) {
*type = VIR_DOMAIN_JOB_NONE;
*params = NULL;
*nparams = 0;
@ -11689,102 +11682,16 @@ qemuDomainGetJobStats(virDomainPtr dom,
* of incoming migration which we don't currently
* monitor actively in the background thread
*/
if (virTimeMillisNow(&priv->job.info.timeElapsed) < 0)
goto cleanup;
priv->job.info.timeElapsed -= priv->job.start;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_TIME_ELAPSED,
priv->job.info.timeElapsed) < 0)
if (qemuDomainJobInfoUpdateTime(priv->job.current) < 0 ||
qemuDomainJobInfoToParams(priv->job.current,
type, params, nparams) < 0)
goto cleanup;
if (priv->job.info.type == VIR_DOMAIN_JOB_BOUNDED &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_TIME_REMAINING,
priv->job.info.timeRemaining) < 0)
goto cleanup;
if (priv->job.status.downtime_set &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DOWNTIME,
priv->job.status.downtime) < 0)
goto cleanup;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_TOTAL,
priv->job.info.dataTotal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_PROCESSED,
priv->job.info.dataProcessed) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_REMAINING,
priv->job.info.dataRemaining) < 0)
goto cleanup;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_TOTAL,
priv->job.info.memTotal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_PROCESSED,
priv->job.info.memProcessed) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_REMAINING,
priv->job.info.memRemaining) < 0)
goto cleanup;
if (priv->job.status.ram_duplicate_set) {
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_CONSTANT,
priv->job.status.ram_duplicate) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_NORMAL,
priv->job.status.ram_normal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_NORMAL_BYTES,
priv->job.status.ram_normal_bytes) < 0)
goto cleanup;
}
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_TOTAL,
priv->job.info.fileTotal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_PROCESSED,
priv->job.info.fileProcessed) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_REMAINING,
priv->job.info.fileRemaining) < 0)
goto cleanup;
if (priv->job.status.xbzrle_set) {
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_CACHE,
priv->job.status.xbzrle_cache_size) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_BYTES,
priv->job.status.xbzrle_bytes) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_PAGES,
priv->job.status.xbzrle_pages) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_CACHE_MISSES,
priv->job.status.xbzrle_cache_miss) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_OVERFLOW,
priv->job.status.xbzrle_overflow) < 0)
goto cleanup;
}
*type = priv->job.info.type;
*params = par;
*nparams = npar;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
if (ret < 0)
virTypedParamsFree(par, npar);
return ret;
}

76
src/qemu/qemu_migration.c
View File

@ -1723,8 +1723,9 @@ qemuMigrationUpdateJobStatus(virQEMUDriverPtr driver,
qemuDomainAsyncJob asyncJob)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
int ret;
qemuMonitorMigrationStatus status;
qemuDomainJobInfoPtr jobInfo;
int ret;
memset(&status, 0, sizeof(status));
@ -1738,62 +1739,40 @@ qemuMigrationUpdateJobStatus(virQEMUDriverPtr driver,
qemuDomainObjExitMonitor(driver, vm);
priv->job.status = status;
if (ret < 0 || virTimeMillisNow(&priv->job.info.timeElapsed) < 0)
if (ret < 0 ||
qemuDomainJobInfoUpdateTime(priv->job.current) < 0)
return -1;
priv->job.info.timeElapsed -= priv->job.start;
ret = -1;
switch (priv->job.status.status) {
jobInfo = priv->job.current;
switch (status.status) {
case QEMU_MONITOR_MIGRATION_STATUS_COMPLETED:
jobInfo->type = VIR_DOMAIN_JOB_COMPLETED;
/* fall through */
case QEMU_MONITOR_MIGRATION_STATUS_SETUP:
case QEMU_MONITOR_MIGRATION_STATUS_ACTIVE:
ret = 0;
break;
case QEMU_MONITOR_MIGRATION_STATUS_INACTIVE:
priv->job.info.type = VIR_DOMAIN_JOB_NONE;
jobInfo->type = VIR_DOMAIN_JOB_NONE;
virReportError(VIR_ERR_OPERATION_FAILED,
_("%s: %s"), job, _("is not active"));
break;
case QEMU_MONITOR_MIGRATION_STATUS_SETUP:
ret = 0;
break;
case QEMU_MONITOR_MIGRATION_STATUS_ACTIVE:
priv->job.info.fileTotal = priv->job.status.disk_total;
priv->job.info.fileRemaining = priv->job.status.disk_remaining;
priv->job.info.fileProcessed = priv->job.status.disk_transferred;
priv->job.info.memTotal = priv->job.status.ram_total;
priv->job.info.memRemaining = priv->job.status.ram_remaining;
priv->job.info.memProcessed = priv->job.status.ram_transferred;
priv->job.info.dataTotal =
priv->job.status.ram_total + priv->job.status.disk_total;
priv->job.info.dataRemaining =
priv->job.status.ram_remaining + priv->job.status.disk_remaining;
priv->job.info.dataProcessed =
priv->job.status.ram_transferred +
priv->job.status.disk_transferred;
ret = 0;
break;
case QEMU_MONITOR_MIGRATION_STATUS_COMPLETED:
priv->job.info.type = VIR_DOMAIN_JOB_COMPLETED;
ret = 0;
break;
case QEMU_MONITOR_MIGRATION_STATUS_ERROR:
priv->job.info.type = VIR_DOMAIN_JOB_FAILED;
jobInfo->type = VIR_DOMAIN_JOB_FAILED;
virReportError(VIR_ERR_OPERATION_FAILED,
_("%s: %s"), job, _("unexpectedly failed"));
break;
case QEMU_MONITOR_MIGRATION_STATUS_CANCELLED:
priv->job.info.type = VIR_DOMAIN_JOB_CANCELLED;
jobInfo->type = VIR_DOMAIN_JOB_CANCELLED;
virReportError(VIR_ERR_OPERATION_ABORTED,
_("%s: %s"), job, _("canceled by client"));
break;
}
jobInfo->status = status;
return ret;
}
@ -1803,11 +1782,14 @@ qemuMigrationUpdateJobStatus(virQEMUDriverPtr driver,
* QEMU reports failed migration.
*/
static int
qemuMigrationWaitForCompletion(virQEMUDriverPtr driver, virDomainObjPtr vm,
qemuMigrationWaitForCompletion(virQEMUDriverPtr driver,
virDomainObjPtr vm,
qemuDomainAsyncJob asyncJob,
virConnectPtr dconn, bool abort_on_error)
virConnectPtr dconn,
bool abort_on_error)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
qemuDomainJobInfoPtr jobInfo = priv->job.current;
const char *job;
int pauseReason;
@ -1825,9 +1807,9 @@ qemuMigrationWaitForCompletion(virQEMUDriverPtr driver, virDomainObjPtr vm,
job = _("job");
}
priv->job.info.type = VIR_DOMAIN_JOB_UNBOUNDED;
jobInfo->type = VIR_DOMAIN_JOB_UNBOUNDED;
while (priv->job.info.type == VIR_DOMAIN_JOB_UNBOUNDED) {
while (jobInfo->type == VIR_DOMAIN_JOB_UNBOUNDED) {
/* Poll every 50ms for progress & to allow cancellation */
struct timespec ts = { .tv_sec = 0, .tv_nsec = 50 * 1000 * 1000ull };
@ -1856,13 +1838,13 @@ qemuMigrationWaitForCompletion(virQEMUDriverPtr driver, virDomainObjPtr vm,
virObjectLock(vm);
}
if (priv->job.info.type == VIR_DOMAIN_JOB_COMPLETED) {
if (jobInfo->type == VIR_DOMAIN_JOB_COMPLETED) {
return 0;
} else if (priv->job.info.type == VIR_DOMAIN_JOB_UNBOUNDED) {
} else if (jobInfo->type == VIR_DOMAIN_JOB_UNBOUNDED) {
/* The migration was aborted by us rather than QEMU itself so let's
* update the job type and notify the caller to send migrate_cancel.
*/
priv->job.info.type = VIR_DOMAIN_JOB_FAILED;
jobInfo->type = VIR_DOMAIN_JOB_FAILED;
return -2;
} else {
return -1;
@ -4914,7 +4896,7 @@ qemuMigrationJobStart(virQEMUDriverPtr driver,
JOB_MASK(QEMU_JOB_MIGRATION_OP)));
}
priv->job.info.type = VIR_DOMAIN_JOB_UNBOUNDED;
priv->job.current->type = VIR_DOMAIN_JOB_UNBOUNDED;
return 0;
}