Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: master
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 161 lines (141 sloc) 4.316 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160
/*
* Copyright (c) 2008, The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google, Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sched.h>
#include <getopt.h>

static void
usage(const char *s)
{
    fprintf(stderr, "USAGE: %s [[-r] [-t TYPE] priority pids ...] [-g pid]\n", s);
    exit(EXIT_FAILURE);
}

void print_prio(pid_t pid)
{
    int sched;
    struct sched_param sp;

    printf("pid %d's priority: %d\n", pid, getpriority(PRIO_PROCESS, pid));

    printf("scheduling class: ");
    sched = sched_getscheduler(pid);
    switch (sched) {
    case SCHED_FIFO:
        printf("FIFO\n");
        break;
    case SCHED_RR:
        printf("RR\n");
        break;
    case SCHED_OTHER:
        printf("Normal\n");
        break;
    case -1:
        perror("sched_getscheduler");
        break;
    default:
        printf("Unknown\n");
    }

    sched_getparam(pid, &sp);
    printf("RT prio: %d (of %d to %d)\n", sp.sched_priority,
           sched_get_priority_min(sched), sched_get_priority_max(sched));
}

int get_sched(char *str)
{
    if (strcasecmp(str, "RR") == 0)
        return SCHED_RR;
    else if (strcasecmp(str, "FIFO") == 0)
        return SCHED_FIFO;
    else if (strcasecmp(str, "NORMAL") == 0)
        return SCHED_OTHER;
    else if (strcasecmp(str, "OTHER") == 0)
        return SCHED_OTHER;
    return SCHED_RR;
}

int renice_main(int argc, char *argv[])
{
    int prio;
    int realtime = 0;
    int opt;
    int sched = SCHED_RR;
    char *cmd = argv[0];

    do {
        opt = getopt(argc, argv, "rt:g:");
        if (opt == -1)
            break;
        switch (opt) {
        case 'r':
            // do realtime priority adjustment
            realtime = 1;
            break;
        case 't':
            sched = get_sched(optarg);
            break;
        case 'g':
            print_prio(atoi(optarg));
            return 0;
        default:
            usage(cmd);
        }
    } while (1);

    argc -= optind;
    argv += optind;

    if (argc < 1)
        usage(cmd);

    prio = atoi(argv[0]);
    argc--;
    argv++;

    if (argc < 1)
        usage(cmd);

    while(argc) {
        pid_t pid;

        pid = atoi(argv[0]);
        argc--;
        argv++;

        if (realtime) {
            struct sched_param sp = { .sched_priority = prio };
            int ret;

            ret = sched_setscheduler(pid, sched, &sp);
            if (ret) {
                perror("sched_set_scheduler");
                exit(EXIT_FAILURE);
            }
        } else {
            int ret;

            ret = setpriority(PRIO_PROCESS, pid, prio);
            if (ret) {
                perror("setpriority");
                exit(EXIT_FAILURE);
            }
        }
    }

    return 0;
}
Something went wrong with that request. Please try again.