diff options
| author | Richard Mudgett <rmudgett@digium.com> | 2016-06-02 16:08:19 -0500 |
|---|---|---|
| committer | Richard Mudgett <rmudgett@digium.com> | 2016-06-09 10:32:07 -0500 |
| commit | 2cd67d5b07d28891ea7c86aece702a4d6e436afc (patch) | |
| tree | 22a35eaf8088ed377a0f1acc1979bde11a0c6543 /include | |
| parent | c966a035e03f1dba94fb24c4a7ed56133425c85a (diff) | |
taskprocessors: Implement high/low water mark alerts.
When taskprocessors get backed up, there is a good chance that we are
being overloaded and need to defer adding new work to the system.
* Implemented a high/low water alert mechanism for modules to check if the
system is being overloaded and take appropriate action. When a
taskprocessor is created it has default congestion levels set. A
taskprocessor can later have those congestion levels altered for specific
needs if stress testing shows that the taskprocessor is a symptom of
overloading or needs to handle bursty activity without triggering an
overload alert.
* Add CLI "core show taskprocessor" low/high water columns.
* Fixed __allocate_taskprocessor() to not use RAII_VAR(). RAII_VAR() was
never a good thing to use when creating a taskprocessor because of the
nature of how its references needed to be cleaned up on a partial
creation.
* Made res_pjsip's distributor check if the taskprocessor overload alert
is active before placing a message representing brand new work onto a
distributor serializer.
ASTERISK-26088
Reported by: Richard Mudgett
Change-Id: I182f1be603529cd665958661c4c05ff9901825fa
Diffstat (limited to 'include')
| -rw-r--r-- | include/asterisk/taskprocessor.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/asterisk/taskprocessor.h b/include/asterisk/taskprocessor.h index af3ce747f..e51122269 100644 --- a/include/asterisk/taskprocessor.h +++ b/include/asterisk/taskprocessor.h @@ -59,6 +59,7 @@ struct ast_taskprocessor; /*! \brief Suggested maximum taskprocessor name length (less null terminator). */ #define AST_TASKPROCESSOR_MAX_NAME 45 +/*! Default taskprocessor high water level alert trigger */ #define AST_TASKPROCESSOR_HIGH_WATER_LEVEL 500 /*! @@ -297,4 +298,26 @@ const char *ast_taskprocessor_name(struct ast_taskprocessor *tps); */ long ast_taskprocessor_size(struct ast_taskprocessor *tps); +/*! + * \brief Get the current taskprocessor high water alert count. + * \since 13.10.0 + * + * \retval 0 if no taskprocessors are in high water alert. + * \retval non-zero if some task processors are in high water alert. + */ +unsigned int ast_taskprocessor_alert_get(void); + +/*! + * \brief Set the high and low alert water marks of the given taskprocessor queue. + * \since 13.10.0 + * + * \param tps Taskprocessor to update queue water marks. + * \param low_water New queue low water mark. (-1 to set as 90% of high_water) + * \param high_water New queue high water mark. + * + * \retval 0 on success. + * \retval -1 on error (water marks not changed). + */ +int ast_taskprocessor_alert_set_levels(struct ast_taskprocessor *tps, long low_water, long high_water); + #endif /* __AST_TASKPROCESSOR_H__ */ |