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WL#5363: Thread Pool Service Interface

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In order to allow thread schedulers to be dynamically loaded,
it is necessary to make the following changes to the server:

- Two new service interfaces

- Modifications to InnoDB to inform the thread scheduler of state changes.

- Changes to the VIO subsystem for checking if data is available on a socket.

- Elimination of remains of the old thread pool implementation.

The two new service interfaces introduces are:

my_thread_scheduler
  A service interface to register a thread
  scheduler.

thd_wait
  A service interface to inform thread scheduler
  that the thread is about to start waiting.

In addition, the patch adds code that:

- Add a call to thd_wait for table locks in mysys
  thd_lock.c by introducing a set function that
  can be used to set a callback to be used when
  waiting on a lock and resuming from waiting.

- Calling the mysys set function from the server
  to set the callbacks correctly.
This commit is contained in:
Mats Kindahl
2010-06-07 16:01:39 +02:00
parent 0c8c4a7133
commit b1dcf448ea
37 changed files with 647 additions and 129 deletions
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3
sql/mysqld.h
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@ -177,7 +177,7 @@ extern ulong binlog_cache_size, open_files_limit;
extern ulonglong max_binlog_cache_size;
extern ulong max_binlog_size, max_relay_log_size;
extern ulong opt_binlog_rows_event_max_size;
extern ulong rpl_recovery_rank, thread_cache_size, thread_pool_size;
extern ulong rpl_recovery_rank, thread_cache_size;
extern ulong back_log;
extern char language[FN_REFLEN];
extern ulong server_id, concurrency;
@ -211,7 +211,6 @@ extern int bootstrap_error;
extern FILE *stderror_file;
extern I_List<THD> threads;
extern char err_shared_dir[];
extern scheduler_functions thread_scheduler;
extern TYPELIB thread_handling_typelib;
extern my_decimal decimal_zero;