diff options
author | rpj <rpj> | 2001-07-05 11:57:32 +0000 |
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committer | rpj <rpj> | 2001-07-05 11:57:32 +0000 |
commit | 99e8ecc5759668fd3af379eaddd70b4ae50ecd7f (patch) | |
tree | 8b824cc1eb8de6fd15a4b5636f5f62fa95541105 /tests/README.benchtests | |
parent | 861a8bb5523f257b474f68334c2c5300e52c5371 (diff) |
Added new routines from POSIX 1003.1j. This is alpha level code.
* spin.c: New module implementing spin locks.
* barrier.c: New module implementing barriers.
* pthread.h (_POSIX_SPIN_LOCKS): defined.
(_POSIX_BARRIERS): Defined.
(pthread_spin_*): Defined.
(pthread_barrier*): Defined.
(PTHREAD_BARRIER_SERIAL_THREAD): Defined.
* implement.h (pthread_spinlock_t_): Defined.
(pthread_barrier_t_): Defined.
(pthread_barrierattr_t_): Defined.
* mutex.c (pthread_mutex_lock): Return with the error
if an auto-initialiser initialisation fails.
* nonportable.c (pthread_getprocessors_np): New; gets the
number of available processors for the current process.
Diffstat (limited to 'tests/README.benchtests')
-rw-r--r-- | tests/README.benchtests | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/tests/README.benchtests b/tests/README.benchtests new file mode 100644 index 0000000..1d8e1e3 --- /dev/null +++ b/tests/README.benchtests @@ -0,0 +1,66 @@ + +------------ +Benchmarking +------------ +There is a new but growing set a benchmarking programs in the +"tests" directory. These should be runnable using the +following command-lines corresponding to each of the possible +library builds: + +MSVC: +nmake clean VC-bench +nmake clean VCE-bench +nmake clean VSE-bench + +Mingw32: +make clean GC-bench +make clean GCE-bench + +UWIN: +The benchtests are run as part of the testsuite. + + +Mutex benchtests +---------------- + +benchtest1 - Lock plus unlock on an unlocked mutex. +benchtest2 - Lock plus unlock on a locked mutex. +benchtest3 - Trylock on a locked mutex. +benchtest4 - Trylock plus unlock on an unlocked mutex. + + +Each test times up to three alternate synchronisation +implementations as a reference, and then times each of +the four mutex types provided by the library. Each is +described below: + +Simple Critical Section +- uses a simple Win32 critical section. There is no +additional overhead for this case as there is in the +remaining cases. + +POSIX mutex implemented using a Critical Section +- The old implementation which uses runtime adaptation +depending on the Windows variant being run on. When +the pthreads DLL was run on WinNT or higher then +POSIX mutexes would use Win32 Critical Sections. + +POSIX mutex implemented using a Win32 Mutex +- The old implementation which uses runtime adaptation +depending on the Windows variant being run on. When +the pthreads DLL was run on Win9x then POSIX mutexes +would use Win32 Mutexes (because TryEnterCriticalSection +is not implemented on Win9x). + +PTHREAD_MUTEX_DEFAULT +PTHREAD_MUTEX_NORMAL +PTHREAD_MUTEX_ERRORCHECK +PTHREAD_MUTEX_RECURSIVE +- The current implementation supports these mutex types. +The underlying basis of POSIX mutexes is now the same +irrespective of the Windows variant. + + +In all benchtests, the operation is repeated a large +number of times and an average is calculated. Loop +overhead is measured and subtracted from all test times. |