I sort of have a newbie problem regarding getting multiple threads
running on multiple cores (quad core). It did work on my previous system
(2.5-rc1) but I can't get it to work with 2.5.5.2 (or 2.5.5.1, 2.5.4).
Here's my small example:
#include <pthread.h>
void* thread( void* ){
unsigned long long i=0;
while( 1 ) i++;
return NULL;
}
int main(){
pthread_t tid1, tid2, tid3, tid4;
pthread_attr_t at1, at2, at3, at4;
pthread_attr_init( &at1 );
pthread_attr_init( &at2 );
pthread_attr_init( &at3 );
pthread_attr_init( &at4 );
pthread_create( &tid1, &at1, thread, NULL );
pthread_create( &tid2, &at2, thread, NULL );
pthread_create( &tid3, &at3, thread, NULL );
pthread_create( &tid4, &at4, thread, NULL );
pthread_join( tid1, NULL );
return 0;
}
If I compile with
g++ main.cpp -lpthread
and run I get 400% load (4 cores)
If I compile with
g++ main.cpp `/usr/xenomai/bin/xeno-config --skin posix --cflags`
`/usr/xenomai/bin/xeno-config --skin posix --ldflags`
I only get 100% load (1 core)
Regards.
/sl
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