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Addition of new tuning parameters for epoll spins and wait time

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This commit is contained in:
Mark Riddoch
2014-10-17 12:28:27 +01:00
parent 2edab598b2
commit e729a17fd4
6 changed files with 162 additions and 17 deletions
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7
server/include/config.h
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@ -29,10 +29,13 @@
* 21/06/13 Mark Riddoch Initial implementation
* 07/05/14 Massimiliano Pinto Added version_string to global configuration
* 23/05/14 Massimiliano Pinto Added id to global configuration
* 17/10/14 Mark Riddoch Added poll tuning configuration parameters
*
* @endverbatim
*/
#define DEFAULT_NBPOLLS 3 /**< Default number of non block polls before we block */
#define DEFAULT_POLLSLEEP 1000 /**< Default poll wait time (milliseconds) */
/**
* Maximum length for configuration parameter value.
*/
@ -92,11 +95,15 @@ typedef struct {
int n_threads; /**< Number of polling threads */
char *version_string; /**< The version string of embedded database library */
unsigned long id; /**< MaxScale ID */
unsigned int n_nbpoll; /**< Tune number of non-blocking polls */
unsigned int pollsleep; /**< Wait time in blocking polls */
} GATEWAY_CONF;
extern int config_load(char *);
extern int config_reload();
extern int config_threadcount();
extern unsigned int config_nbpolls();
extern unsigned int config_pollsleep();
CONFIG_PARAMETER* config_get_param(CONFIG_PARAMETER* params, const char* name);
config_param_type_t config_get_paramtype(CONFIG_PARAMETER* param);
CONFIG_PARAMETER* config_clone_param(CONFIG_PARAMETER* param);

14
server/include/dcb.h
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@ -102,17 +102,19 @@ typedef struct gw_protocol {
* The event queue structure used in the polling loop to maintain a queue
* of events that need to be processed for the DCB.
*
* next The next DCB in the event queue
* prev The previous DCB in the event queue
* pending_events The events that are pending processing
* processing Flag to indicate the processing status of the DCB
* eventqlock Spinlock to protect this structure
* inserted Insertion time for logging purposes
* next The next DCB in the event queue
* prev The previous DCB in the event queue
* pending_events The events that are pending processing
* processing_events The evets currently being processed
* processing Flag to indicate the processing status of the DCB
* eventqlock Spinlock to protect this structure
* inserted Insertion time for logging purposes
*/
typedef struct {
struct dcb *next;
struct dcb *prev;
uint32_t pending_events;
uint32_t processing_events;
int processing;
SPINLOCK eventqlock;
unsigned long inserted;

3
server/include/poll.h
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@ -32,7 +32,6 @@
* @endverbatim
*/
#define MAX_EVENTS 1000
#define EPOLL_TIMEOUT 1000 /**< The epoll timeout in milliseconds */
extern void poll_init();
extern int poll_add_dcb(DCB *);
@ -40,6 +39,8 @@ extern int poll_remove_dcb(DCB *);
extern void poll_waitevents(void *);
extern void poll_shutdown();
extern GWBITMASK *poll_bitmask();
extern void poll_set_maxwait(unsigned int);
extern void poll_set_nonblocking_polls(unsigned int);
extern void dprintPollStats(DCB *);
extern void dShowThreads(DCB *dcb);
extern void dShowEventQ(DCB *dcb);