Hi,
attached is a little C program that spawns off a task which runs a
heavy tiny math job. Despite my 8 processor machine, taking this one
task to 99% CPU load slows down the entire computer, often such that
there is no return except for a forced restart.
I run the xenomai-head git, updated on Oct. 29 the last time, on a
i386 ubuntu system with kernel 2.6.29.5.
Does anybody know what is going wrong here, i.e., am I not permitted
to take my CPUs to the max load?
Any help would be highly appreciated!!!
Best wishes,
-Stefan
Compile statement:
gcc -o xtest xeno_spawn_test.c -I/usr/xenomai/include -Wl,@/usr/
xenomai/lib/posix.wrappers -L/usr/xenomai/lib -lpthre
ad_rt -lpthread -lrt -lnative
Run:
unix> xtest
------------------------------------------------ xeno_spawn_test.c
---------------------------------------------
#include <sys/mman.h>
#include <pthread.h>
#include <stdio.h>
pthread_t cthread;
// a quick thread to run ....
void *
run_thread(void *dummy)
{
int i;
for (i=1; i<=1000; ++i) {
printf("%d thread is runnning\n",i);
sleep(1);
}
return NULL;
}
// main program
int
main() {
int rc;
pthread_attr_t pth_attr;
#ifdef __XENO__
mlockall(MCL_CURRENT | MCL_FUTURE);
#endif
if ((rc=pthread_attr_init(&pth_attr)))
printf("pthread_attr_init returned %d\n",rc);
if ((rc=pthread_create( &cthread, &pth_attr, run_thread, NULL)))
printf("pthread_create returned with %d\n",rc);
// wait a bit to get some print outs from the thread
sleep(10);
return 1;
}
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