Mutex

On Solaris and Linux a Parker contains a pthread condvar (named _condvar), mutex (named _mutex), and a volatile integer, _counter, that represents the state of the semaphore. ❋ Unknown (2009)

We call a mutex (mutual exclusion) a semaphore with a value of one. ❋ Unknown (2010)

One solution to this is to use a mutex, which is similar to a ❋ Unknown (2010)

This is accomplished with APR's file-locking code, not on the resource itself but on a stub file of the same name with ". mutex" appended. ❋ Unknown (2008)

For example, an object that contains a handle to a Windows kernel object such as a file, process, thread, mutex, event, semaphore, and so on would have no meaning when deserialized into another process or machine since Windows kernel handles are process-relative values. ❋ Devon Musgrave (2011)

Here is the output when passing the number 13 as an argument: msec Threads number is 1 Shared serial (mutex) - ❋ Logicchild (2010)

Now the flush list has its own mutex, reducing contention with buffer pool operations and making InnoDB faster without any configuration needed on your part. ❋ MySQL (2010)

The watcher-thread now waits for calculation-thread (instead of some event/mutex) for specified timeout. ❋ Ajay Vijayvargiya (2010)

Previously, a single mutex protected different memory areas related to the undo and logging information. ❋ MySQL (2010)

Any type of objects can be specified (any combination of mutex, events, semaphores, process/thread handles etc.). ❋ Ajay Vijayvargiya (2010)

Along the same lines, operations involving the buffer pool and the flush list previously were protected by a single mutex, which could cause unnecessary delays. ❋ MySQL (2010)

In particular, this mutex blocked access to the buffer pool, while changes were being written there by DDL operations making changes to the data dictionary. ❋ MySQL (2010)

Hi, I had created a mutex for a console application in c# mutex = new Mutex (true, "Global\\" + sExeName, out bCreatedNew); if (bCreatedNew) mutex. ❋ Unknown (2010)

· Pitch shifting: added safety mutex for initialization of some pitch shifters ❋ Softpedia Mac OS (2010)

(The buffer pool mutex has historically been very hot, so any other operation that tied up the buffer pool was adding fuel to the fire.) ❋ MySQL (2010)

Splitting the old log_sys mutex to create a separate log_flush_order mutex means that all of this internal processing can happen with less waiting and less blocking of other operations involving the buffer pool, without any configuration needed on your part. ❋ MySQL (2010)

All the structures normally associated with the buffer pool can now be multiplied, such as the mutex that protects it, the LRU information, and the flush list. ❋ MySQL (2010)

The scalability improvements in InnoDB 1.1 revolve around better isolation of threads and mutex contention. ❋ MySQL (2010)