LD_PRELOAD a library that interposes on thread_create or pthread_create,
Have this lib use priocntl to change thread priorities. If you are
not running as root, you must use RBAC to give yourself permission
to modify priority (proc_priocntl).
in /etc/user_attr
username::::defaultpriv=basic,proc_priocntl
See attached for
sample code.
rick
On Fri, Nov 12, 2010 at 10:17:12PM -0800, Kishore Kumar Pusukuri wrote:
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> Date: Fri, 12 Nov 2010 22:17:12 PST
> From: Kishore Kumar Pusukuri <kish...@cs.ucr.edu>
> To: observability-discuss@opensolaris.org
> Subject: [observability-discuss] Change scheduling class of a thread (lwp)
> of a process.
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> Hi,
> We can change the scheduling class of a process (either single threaded or
> multithreaded) using priocntl(1) utility. However, I would like to use
> different scheduling classes for different threads (lwps) of a process on
> OpenSolaris.2009.06. But there is no such an option with priocntl(1) (as far
> as I have seen). It seems that the utility priocntl(1) changes the scheduling
> class for the whole process (same class for all the threads of that process).
>
> Could anyone provide me if there is a way to do this, please?
>
> Thank you.
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--
Rickey C. Weisner
Software Development and Performance Specialist
Principal Software Engineer
Systems Quality Office
Oracle Corporation
cell phone: 615-308-1147
email: rick.weis...@oracle.com
#include <stdio.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/priocntl.h>
#include <sys/rtpriocntl.h>
#include <sys/tspriocntl.h>
#include <sys/iapriocntl.h>
#include <sys/fsspriocntl.h>
#include <sys/fxpriocntl.h>
#include <dlfcn.h>
int pthread_create(pthread_t *restrict thread,
const pthread_attr_t *restrict attr,
void *(*start_routine)(void*), void *restrict arg)
{
static int (* fptr)()= 0;
pcparms_t my_parms;
int rc;
if (fptr == 0) {
fptr = (int (*)())dlsym(RTLD_NEXT, "pthread_create");
if (fptr == NULL) {
printf("dlopen: %s\n",dlerror());
return (int) -1;
}
printf("setting FX priority for thread 1 \n");
priocntl(P_LWPID, 1, PC_SETXPARMS, "FX", FX_KY_UPRILIM, 60, FX_KY_UPRI,
60, FX_KY_TQSECS, 300, NULL);
}
rc =(int )fptr( thread, attr, start_routine, arg);
priocntl(P_LWPID, *thread, PC_SETXPARMS, "TS", NULL);
return(rc) ;
}
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