| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2006-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2006. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <errno.h> |
| 20 | #include <pthread.h> |
| 21 | #include <sched.h> |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <unistd.h> |
| 26 | #include <sys/syscall.h> |
| 27 | |
| 28 | /* This test is Linux specific. */ |
| 29 | #define CHECK_TPP_PRIORITY(normal, boosted) \ |
| 30 | do \ |
| 31 | { \ |
| 32 | pid_t tid = syscall (__NR_gettid); \ |
| 33 | \ |
| 34 | struct sched_param cep_sp; \ |
| 35 | int cep_policy; \ |
| 36 | if (pthread_getschedparam (pthread_self (), &cep_policy, \ |
| 37 | &cep_sp) != 0) \ |
| 38 | { \ |
| 39 | puts ("getschedparam failed"); \ |
| 40 | ret = 1; \ |
| 41 | } \ |
| 42 | else if (cep_sp.sched_priority != (normal)) \ |
| 43 | { \ |
| 44 | printf ("unexpected priority %d != %d\n", \ |
| 45 | cep_sp.sched_priority, (normal)); \ |
| 46 | } \ |
| 47 | if (syscall (__NR_sched_getparam, tid, &cep_sp) == 0 \ |
| 48 | && cep_sp.sched_priority != (boosted)) \ |
| 49 | { \ |
| 50 | printf ("unexpected boosted priority %d != %d\n", \ |
| 51 | cep_sp.sched_priority, (boosted)); \ |
| 52 | ret = 1; \ |
| 53 | } \ |
| 54 | } \ |
| 55 | while (0) |
| 56 | |
| 57 | int fifo_min, fifo_max; |
| 58 | |
| 59 | void |
| 60 | init_tpp_test (void) |
| 61 | { |
| 62 | fifo_min = sched_get_priority_min (SCHED_FIFO); |
| 63 | if (fifo_min < 0) |
| 64 | { |
| 65 | printf ("couldn't get min priority for SCHED_FIFO: %m\n"); |
| 66 | exit (1); |
| 67 | } |
| 68 | |
| 69 | fifo_max = sched_get_priority_max (SCHED_FIFO); |
| 70 | if (fifo_max < 0) |
| 71 | { |
| 72 | printf ("couldn't get max priority for SCHED_FIFO: %m\n"); |
| 73 | exit (1); |
| 74 | } |
| 75 | |
| 76 | if (fifo_min > 4 || fifo_max < 10) |
| 77 | { |
| 78 | printf ("%d..%d SCHED_FIFO priority interval not suitable for this test\n", |
| 79 | fifo_min, fifo_max); |
| 80 | exit (0); |
| 81 | } |
| 82 | |
| 83 | struct sched_param sp; |
| 84 | memset (&sp, 0, sizeof (sp)); |
| 85 | sp.sched_priority = 4; |
| 86 | int e = pthread_setschedparam (pthread_self (), SCHED_FIFO, &sp); |
| 87 | if (e != 0) |
| 88 | { |
| 89 | errno = e; |
| 90 | printf ("cannot set scheduling params: %m\n"); |
| 91 | exit (0); |
| 92 | } |
| 93 | } |