1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
40  * Returns 1 if p2 is "better" than p1
44  *	1) Only foreground processes are eligible - implied.
49  *	   we pick out just "short-term" sleepers (TDF_SINTR == 0).
55  * TODO - consider whether pctcpu should be used.
58 #define	ISRUN(p)	(((p)->ki_stat == SRUN) || ((p)->ki_stat == SIDL))
65 proc_compare(struct kinfo_proc *p1, struct kinfo_proc *p2)  in proc_compare()  argument
68 	if (p1 == NULL)  in proc_compare()
73 	switch (TESTAB(ISRUN(p1), ISRUN(p2))) {  in proc_compare()
80 		 * tie - favor one with highest recent cpu utilization  in proc_compare()
82 		if (p2->ki_estcpu > p1->ki_estcpu)  in proc_compare()
84 		if (p1->ki_estcpu > p2->ki_estcpu)  in proc_compare()
86 		return (p2->ki_pid > p1->ki_pid); /* tie - return highest pid */  in proc_compare()
91 	switch (TESTAB(p1->ki_stat == SZOMB, p2->ki_stat == SZOMB)) {  in proc_compare()
97 		return (p2->ki_pid > p1->ki_pid); /* tie - return highest pid */  in proc_compare()
102 	if (p2->ki_slptime > p1->ki_slptime)  in proc_compare()
104 	if (p1->ki_slptime > p2->ki_slptime)  in proc_compare()
107 	 * favor one sleeping in a non-interruptible sleep  in proc_compare()
109 	if (p1->ki_tdflags & TDF_SINTR && (p2->ki_tdflags & TDF_SINTR) == 0)  in proc_compare()
111 	if (p2->ki_tdflags & TDF_SINTR && (p1->ki_tdflags & TDF_SINTR) == 0)  in proc_compare()
113 	return (p2->ki_pid > p1->ki_pid);	/* tie - return highest pid */  in proc_compare()