PTHREAD_MUTEX_ADAPTIVE_NP is something that I invented while working in the role of a glibc contributor on making LinuxThreads more reliable and perform better. LinuxThreads was the predecessor to glibc’s NPTL library , originally developed as a stand-alone library by Xavier Leroy, who is also well-known as one of the creators of OCaml .
2/1/2016 · Synchronization. The queue indices must be protected from concurrent access. This is a naive solution, so I picked a simple mutex. It may be interesting to benchmark an implementation that doesn …
Adaptive spin is used for mutexes initialized with the PTHREAD_MUTEX_ADAPTIVE_NP GNU extension. It affects both pthread_mutex_lock and pthread_mutex_timedlock. The thread spins until either the maximum spin count is reached or the lock is acquired. The default value of this tunable is ‘100’.
2/10/2010 · What does _np suffix mean here: pthread_mutex_timedlock_np or in macros. PTHREAD_MUTEX_TIMED_NP Upd: From glibc2.2. enum { PTHREAD_MUTEX_TIMED_NP, PTHREAD_MUTEX_RECURSIVE_NP, PTHREAD_MUTEX_ERRORCHECK_NP, PTHREAD_ MUTEX_ADAPTIVE _NP #ifdef __USE_UNIX98 , PTHREAD_MUTEX_NORMAL.
1/9/2016 · Yes, it should also be dependent of ELEKTRA_LOCK_MUTEX.But if PTHREAD_RECURSIVE_ MUTEX _INITIALIZER_NP exists should be also checked. The check with APPLE and MACH is not useful (or since 10.7 even wrong).. So it should be similar to: #ifdef ELEKTRA_LOCK_MUTEX // do we need a lock at all? #ifdef PTHREAD_RECURSIVE_ MUTEX _INITIALIZER_NP // .
== PTHREAD_MUTEX_ADAPTIVE_NP, 1)) {if (! __is_smp) goto simple if (LLL_MUTEX_TRYLOCK (mutex) != 0) {int cnt = 0 int max_cnt = MIN.
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