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author | Jennifer Averett <jennifer.averett@oarcorp.com> | 2014-01-31 08:54:45 -0600 |
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committer | Jennifer Averett <jennifer.averett@oarcorp.com> | 2014-03-07 09:10:33 -0600 |
commit | 185e46f6a05295755f0f4522cf44c93ec8cbd7d1 (patch) | |
tree | 05571a7fb077cf768913b7403a834baee89ab07c /cpukit/posix/src | |
parent | rtems: Add Classic API get and set affinity methods. (diff) | |
download | rtems-185e46f6a05295755f0f4522cf44c93ec8cbd7d1.tar.bz2 |
posix: Add POSIX thread affinity attribute support.
With the addition of pthread affinity information in pthread_attr_t,
the existing code for pthread_attr_t had to be adjusted.
Diffstat (limited to 'cpukit/posix/src')
-rw-r--r-- | cpukit/posix/src/pthread.c | 52 | ||||
-rw-r--r-- | cpukit/posix/src/pthreadattrinit.c | 5 | ||||
-rw-r--r-- | cpukit/posix/src/pthreadcreate.c | 19 |
3 files changed, 61 insertions, 15 deletions
diff --git a/cpukit/posix/src/pthread.c b/cpukit/posix/src/pthread.c index 5988a5e772..f432b1ba53 100644 --- a/cpukit/posix/src/pthread.c +++ b/cpukit/posix/src/pthread.c @@ -17,10 +17,12 @@ #if HAVE_CONFIG_H #include "config.h" #endif +#include <stdio.h> #include <errno.h> #include <pthread.h> #include <limits.h> +#include <assert.h> #include <rtems/system.h> #include <rtems/config.h> @@ -46,13 +48,14 @@ * NOTE: Be careful .. if the default attribute set changes, * _POSIX_Threads_Initialize_user_threads will need to be examined. */ -const pthread_attr_t _POSIX_Threads_Default_attributes = { - true, /* is_initialized */ - NULL, /* stackaddr */ - 0, /* stacksize -- will be adjusted to minimum */ - PTHREAD_SCOPE_PROCESS, /* contentionscope */ - PTHREAD_INHERIT_SCHED, /* inheritsched */ - SCHED_FIFO, /* schedpolicy */ +pthread_attr_t _POSIX_Threads_Default_attributes = { + .is_initialized = true, /* is_initialized */ + .stackaddr = NULL, /* stackaddr */ + .stacksize = 0, /* stacksize -- will be adjusted to minimum */ + .contentionscope = PTHREAD_SCOPE_PROCESS, /* contentionscope */ + .inheritsched = PTHREAD_INHERIT_SCHED, /* inheritsched */ + .schedpolicy = SCHED_FIFO, /* schedpolicy */ + .schedparam = { /* schedparam */ 2, /* sched_priority */ #if defined(_POSIX_SPORADIC_SERVER) || \ @@ -63,13 +66,19 @@ const pthread_attr_t _POSIX_Threads_Default_attributes = { 0 /* sched_ss_max_repl */ #endif }, + #if HAVE_DECL_PTHREAD_ATTR_SETGUARDSIZE - 0, /* guardsize */ + .guardsize = 0, /* guardsize */ #endif #if defined(_POSIX_THREAD_CPUTIME) - 1, /* cputime_clock_allowed */ + .cputime_clock_allowed = 1, /* cputime_clock_allowed */ + #endif + .detachstate = PTHREAD_CREATE_JOINABLE, /* detachstate */ + #if defined(__RTEMS_HAVE_SYS_CPUSET_H__) + .affinitysetsize = 0, + .affinityset = NULL, + .affinitysetpreallocated = {{0x0}} #endif - PTHREAD_CREATE_JOINABLE, /* detachstate */ }; /* @@ -187,7 +196,7 @@ static bool _POSIX_Threads_Create_extension( created->API_Extensions[ THREAD_API_POSIX ] = api; /* XXX check all fields are touched */ - api->Attributes = _POSIX_Threads_Default_attributes; + _POSIX_Threads_Initialize_attributes( &api->Attributes ); api->detachstate = _POSIX_Threads_Default_attributes.detachstate; api->schedpolicy = _POSIX_Threads_Default_attributes.schedpolicy; api->schedparam = _POSIX_Threads_Default_attributes.schedparam; @@ -346,6 +355,27 @@ User_extensions_Control _POSIX_Threads_User_extensions = { */ void _POSIX_Threads_Manager_initialization(void) { + #if defined(__RTEMS_HAVE_SYS_CPUSET_H__) + pthread_attr_t *attr; + int i; + int max_cpus = 1; + + /* Initialize default attribute. */ + attr = &_POSIX_Threads_Default_attributes; + + /* We do not support a cpu count over CPU_SETSIZE */ + max_cpus = _SMP_Get_processor_count(); + assert( max_cpus <= CPU_SETSIZE ); + + /* Initialize the affinity to be the set of all available CPU's */ + attr->affinityset = &attr->affinitysetpreallocated; + attr->affinitysetsize = sizeof( *attr->affinityset ); + CPU_ZERO_S( attr->affinitysetsize, &attr->affinitysetpreallocated ); + + for (i=0; i<max_cpus; i++) + CPU_SET_S(i, attr->affinitysetsize, attr->affinityset ); + #endif + _Objects_Initialize_information( &_POSIX_Threads_Information, /* object information table */ OBJECTS_POSIX_API, /* object API */ diff --git a/cpukit/posix/src/pthreadattrinit.c b/cpukit/posix/src/pthreadattrinit.c index cf0ecabfe9..3dc66449f9 100644 --- a/cpukit/posix/src/pthreadattrinit.c +++ b/cpukit/posix/src/pthreadattrinit.c @@ -34,6 +34,7 @@ int pthread_attr_init( if ( !attr ) return EINVAL; - *attr = _POSIX_Threads_Default_attributes; - return 0; + _POSIX_Threads_Initialize_attributes( attr ); + + return 0; } diff --git a/cpukit/posix/src/pthreadcreate.c b/cpukit/posix/src/pthreadcreate.c index b780eccfe9..b1483726e0 100644 --- a/cpukit/posix/src/pthreadcreate.c +++ b/cpukit/posix/src/pthreadcreate.c @@ -27,6 +27,7 @@ #include <rtems/posix/priorityimpl.h> #include <rtems/posix/pthreadimpl.h> #include <rtems/posix/time.h> +#include <rtems/score/cpusetimpl.h> #include <rtems/score/threadimpl.h> #include <rtems/score/apimutex.h> #include <rtems/score/stackimpl.h> @@ -136,6 +137,14 @@ int pthread_create( if ( rc ) return rc; +#if defined(RTEMS_SMP) +#if __RTEMS_HAVE_SYS_CPUSET_H__ + rc = _CPU_set_Is_valid( attr->affinityset, attr->affinitysetsize ); + if ( rc != 0 ) + return EINVAL; +#endif +#endif + /* * Currently all POSIX threads are floating point if the hardware * supports it. @@ -179,19 +188,25 @@ int pthread_create( 0, /* isr level */ name /* posix threads don't have a name */ ); - if ( !status ) { _POSIX_Threads_Free( the_thread ); _RTEMS_Unlock_allocator(); return EAGAIN; } +#if defined(RTEMS_SMP) +#if __RTEMS_HAVE_SYS_CPUSET_H__ + the_thread->affinity.setsize = attr->affinitysetsize; + *the_thread->affinity.set = *attr->affinityset; +#endif +#endif + /* * finish initializing the per API structure */ api = the_thread->API_Extensions[ THREAD_API_POSIX ]; - api->Attributes = *the_attr; + _POSIX_Threads_Copy_attributes( &api->Attributes, the_attr ); api->detachstate = the_attr->detachstate; api->schedpolicy = schedpolicy; api->schedparam = schedparam; |