Hi Pablo,
U can use same attribute object to create as many
threads as u wish. Once u call pthread_create function
all attribute fields are copied into thread structure.
U can see it in __pthread_create function in
schedulers/rtl_sched.c file.
Regards
Venkat
--- Pablo Alvarez <[EMAIL PROTECTED]> wrote:
> Hi Ravi,
>
> I think you should not use the same attribute object
> for both threads,
> especially since they are supposed to have different
> priorities. Do you get
> the kernel panic if you use two separate attribute
> objects?
>
> Pablo Alvarez
>
> At 12:02 PM 3/27/2002 +0530, you wrote:
> >Hello,
> >
> >I am facing a problem while creating more than one
> rt-threads in my program.
> >On some machines it is consistantly giving kernel
> panic result. Some other
> >machines it does not give any problem and my
> program works fine.
> >
> >I would like to know whethere there is any
> limitation in creating more than
> >one RT-Threads in a single process. If anyone out
> there has any idea, can
> >you please let me know where I am doing wrong?
> >
> >Both the machines have rtl-3.1 and kernel version
> 2.4.4.
> >
> >Here I am attaching the small sample program I have
> written. I have modified
> >the same hello.c in the examples that come along
> with the rt-linux
> >installation and am using the same Makefile for
> creating the module and
> >inserting it.
> >
> >Thanks much in advance for your help.
> >
> >Regards,
> >Ravi
> >
> >/* ===
> >hello.c
> >====*/
> >
> >
> >#include <rtl.h>
> >#include <time.h>
> >#include <pthread.h>
> >#include <linux/malloc.h>
> >
> >pthread_t thread;
> >pthread_t thread1;
> >pthread_attr_t attr;
> >struct sched_param schedParam;
> >
> >char *name = NULL;
> >
> >void * start_routine(void *arg)
> >{
> > int cnt = 0;
> >
> > pthread_make_periodic_np (pthread_self(),
> gethrtime(), 500000000);
> >
> > while (1) {
> > pthread_wait_np ();
> > if(cnt %10 == 0)
> > {
> > cnt = 0;
> > rtl_printf("I'm here; my
> arg is %x\n", (unsigned)
> >arg);
> > }
> > cnt++;
> > }
> > return 0;
> >}
> >void * start_routine1(void *arg)
> >{
> > int cnt = 0;
> > char *name = "Test program";
> >
> > pthread_make_periodic_np (pthread_self(),
> gethrtime(), 500000000);
> >
> > while (1) {
> > pthread_wait_np ();
> > if(cnt % 20 == 0)
> > {
> > rtl_printf("in thread 2
> \n");
> > rtl_printf("my arg is
> %x\n", (unsigned) arg);
> > if(name != NULL)
> > rtl_printf(" Name
> = %s \n", name);
> > cnt = 0;
> > }
> > cnt++;
> > }
> > return 0;
> >}
> >
> >int init_module(void) {
> > int ret = 0;
> > pthread_attr_init(&attr);
> > schedParam.sched_priority = 2;
> > pthread_attr_setschedparam(&attr,
> &schedParam);
> > ret = pthread_create (&thread, &attr,
> start_routine, 0);
> >
> > pthread_attr_init(&attr);
> > schedParam.sched_priority = 1;
> > pthread_attr_setschedparam(&attr,
> &schedParam);
> > ret = pthread_create (&thread1, &attr,
> start_routine1, 0);
> > return ret;
> >}
> >
> >void cleanup_module(void) {
> > pthread_delete_np (thread);
> > pthread_delete_np (thread1);
> >}
> >
> >/* ================
> >end of the hello.c program
> >================== */
> >-- [rtl] ---
> >To unsubscribe:
> >echo "unsubscribe rtl" | mail [EMAIL PROTECTED]
> OR
> >echo "unsubscribe rtl <Your_email>" | mail
> [EMAIL PROTECTED]
> >--
> >For more information on Real-Time Linux see:
> >http://www.rtlinux.org/
>
>
>
------------------------------------------------------------
> Pablo Alvarez, Ph.D. Phone: (617)
> 353-1423
> Boston University Fax: (617)
> 353-1414
> Dept. of Psychology email:
> [EMAIL PROTECTED]
> 64 Cummington Street
> Boston, MA 02215, USA
>
------------------------------------------------------------
>
> -- [rtl] ---
> To unsubscribe:
> echo "unsubscribe rtl" | mail [EMAIL PROTECTED]
> OR
> echo "unsubscribe rtl <Your_email>" | mail
> [EMAIL PROTECTED]
> --
> For more information on Real-Time Linux see:
> http://www.rtlinux.org/
>
__________________________________________________
Do You Yahoo!?
Yahoo! Movies - coverage of the 74th Academy Awards®
http://movies.yahoo.com/
-- [rtl] ---
To unsubscribe:
echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
--
For more information on Real-Time Linux see:
http://www.rtlinux.org/
