micke wrote:
> Hi, Im having a little problem using the priocntl syscall, I want to use the
> PC_SETXPARMS and PC_GETXPARMS as commands.
>
>
>>From the man page of priocntl I get it as I should use is it like this:
>
> [b]priocntl(P_PID, 0, PC_SETXPARMS, "RT", RT_KY_PRI, 10);[/b]
>
> If I want to change the class to real-time and priority to 10 of the calling
> process, but it returns -1, invalid argument, whats wrong here?
Here is some example code, from opensolaris under a CDDL license, that
uses priocntl to switch to the FX class, which should give you the
guidance you need:
pcinfo_t pcinfo;
pri_t maxupri;
if (priocntl(P_PID, P_MYID, PC_GETXPARMS, NULL,
PC_KY_CLNAME, pc_clname, 0) == -1) {
perror("priocntl");
}
if ((strcmp("TS", pc_clname) == 0) ||
(strcmp("IA", pc_clname) == 0)) {
cryptodebug("current sched class is TS/IA");
(void) strcpy(pcinfo.pc_clname, "FX");
if (priocntl(0, 0, PC_GETCID, (caddr_t)&pcinfo) != -1) {
maxupri = ((fxinfo_t *)pcinfo.pc_clinfo)->fx_maxupri;
if (priocntl(P_LWPID, P_MYID, PC_SETXPARMS, "FX",
FX_KY_UPRILIM, maxupri, FX_KY_UPRI, maxupri,
FX_KY_TQNSECS, FX_TQINF, NULL) != 0) {
perror("priocntl");
}
} else {
error(LOG_ERR,
"Unable to determine parameters for FX scheduler. "
"Using system default scheduler.");
}
}
--
Darren J Moffat
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