sched-quota.h

/*
 * Copyright (C) 2013 Philippe Gerum <rpm@xenomai.org>.
 *
 * Xenomai is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * Xenomai is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Xenomai; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */
#ifndef _COBALT_KERNEL_SCHED_QUOTA_H
#define _COBALT_KERNEL_SCHED_QUOTA_H
 
#ifndef _COBALT_KERNEL_SCHED_H
#error "please don't include cobalt/kernel/sched-quota.h directly"
#endif
 
#ifdef CONFIG_XENO_OPT_SCHED_QUOTA
 
#define XNSCHED_QUOTA_MIN_PRIO  1
#define XNSCHED_QUOTA_MAX_PRIO  255
#define XNSCHED_QUOTA_NR_PRIO   \
        (XNSCHED_QUOTA_MAX_PRIO - XNSCHED_QUOTA_MIN_PRIO + 1)
 
extern struct xnsched_class xnsched_class_quota;
 
struct xnsched_quota_group {
        struct xnsched *sched;
        xnticks_t quota_ns;
        xnticks_t quota_peak_ns;
        xnticks_t run_start_ns;
        xnticks_t run_budget_ns;
        xnticks_t run_credit_ns;
        struct list_head members;
        struct list_head expired;
        struct list_head next;
        int nr_active;
        int nr_threads;
        int tgid;
        int quota_percent;
        int quota_peak_percent;
};
 
struct xnsched_quota {
        xnticks_t period_ns;
        struct xntimer refill_timer;
        struct xntimer limit_timer;
        struct list_head groups;
};
 
static inline int xnsched_quota_init_thread(struct xnthread *thread)
{
        thread->quota = NULL;
        INIT_LIST_HEAD(&thread->quota_expired);
 
        return 0;
}
 
int xnsched_quota_create_group(struct xnsched_quota_group *tg,
                               struct xnsched *sched,
                               int *quota_sum_r);
 
int xnsched_quota_destroy_group(struct xnsched_quota_group *tg,
                                int force,
                                int *quota_sum_r);
 
void xnsched_quota_set_limit(struct xnsched_quota_group *tg,
                             int quota_percent, int quota_peak_percent,
                             int *quota_sum_r);
 
struct xnsched_quota_group *
xnsched_quota_find_group(struct xnsched *sched, int tgid);
 
int xnsched_quota_sum_all(struct xnsched *sched);
 
#endif /* !CONFIG_XENO_OPT_SCHED_QUOTA */
 
#endif /* !_COBALT_KERNEL_SCHED_QUOTA_H */