projects / apple / xnu.git / blame
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|---|---|---|
| d9a64523 A |
1 | /* |
| 2 | * Copyright (c) 2018 Apple Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * This file contains Original Code and/or Modifications of Original Code | |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. The rights granted to you under the License | |
| 10 | * may not be used to create, or enable the creation or redistribution of, | |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any | |
| 13 | * terms of an Apple operating system software license agreement. | |
| 14 | * | |
| 15 | * Please obtain a copy of the License at | |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 17 | * | |
| 18 | * The Original Code and all software distributed under the License are | |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 23 | * Please see the License for the specific language governing rights and | |
| 24 | * limitations under the License. | |
| 25 | * | |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
| 27 | */ | |
| 28 | ||
| 29 | /* | |
| 30 | * Test to validate that _COMM_PAGE_CPU_QUIESCENT_COUNTER ticks at least once per second | |
| 31 | * | |
| 32 | * <rdar://problem/42433973> | |
| 33 | */ | |
| 34 | ||
| 35 | #include <System/machine/cpu_capabilities.h> | |
| 36 | ||
| 37 | #include <darwintest.h> | |
| 38 | ||
| 39 | #include <stdio.h> | |
| 40 | #include <stdint.h> | |
| 41 | #include <unistd.h> | |
| 42 | #include <sys/sysctl.h> | |
| 43 | ||
| 44 | #ifndef _COMM_PAGE_CPU_QUIESCENT_COUNTER | |
| 45 | ||
| 46 | T_DECL(test_quiescent_counter, "Validate that _COMM_PAGE_CPU_QUIESCENT_COUNTER increments", | |
| 47 | T_META_CHECK_LEAKS(false)) | |
| 48 | { | |
| 49 | T_SKIP("_COMM_PAGE_CPU_QUIESCENT_COUNTER doesn't exist on this system"); | |
| 50 | } | |
| 51 | ||
| 52 | #else /* _COMM_PAGE_CPU_QUIESCENT_COUNTER */ | |
| 53 | ||
| 54 | T_DECL(test_quiescent_counter, "Validate that _COMM_PAGE_CPU_QUIESCENT_COUNTER increments", | |
| 55 | T_META_CHECK_LEAKS(false)) | |
| 56 | { | |
| 57 | int rv; | |
| 58 | ||
| 59 | uint32_t cpu_checkin_min_interval = 0; /* set by sysctl hw.ncpu */ | |
| 60 | ||
| 61 | size_t value_size = sizeof(cpu_checkin_min_interval); | |
| 62 | rv = sysctlbyname("kern.cpu_checkin_interval", &cpu_checkin_min_interval, &value_size, NULL, 0); | |
| 63 | T_ASSERT_POSIX_SUCCESS(rv, "sysctlbyname(kern.cpu_checkin_interval)"); | |
| 64 | ||
| 65 | T_LOG("kern.cpu_checkin_interval is %d", cpu_checkin_min_interval); | |
| 66 | ||
| 67 | T_ASSERT_GT(cpu_checkin_min_interval, 0, "kern.cpu_checkin_interval should be > 0"); | |
| 68 | ||
| 69 | uint64_t* commpage_addr = (uint64_t *)(uintptr_t)_COMM_PAGE_CPU_QUIESCENT_COUNTER; | |
| 70 | ||
| 71 | T_LOG("address of _COMM_PAGE_CPU_QUIESCENT_COUNTER is %p", (void*) commpage_addr); | |
| 72 | ||
| 73 | uint64_t counter = *commpage_addr; | |
| 74 | uint64_t last_counter = counter; | |
| 75 | T_LOG("first value of _COMM_PAGE_CPU_QUIESCENT_COUNTER is %llu", counter); | |
| 76 | ||
| 77 | for (int i = 0 ; i < 10 ; i++) | |
| 78 | { | |
| 79 | sleep(1); | |
| 80 | ||
| 81 | last_counter = counter; | |
| 82 | counter = *commpage_addr; | |
| 83 | ||
| 84 | T_LOG("value of _COMM_PAGE_CPU_QUIESCENT_COUNTER is %llu", counter); | |
| 85 | ||
| 86 | T_ASSERT_GT(counter, last_counter, "_COMM_PAGE_CPU_QUIESCENT_COUNTER must monotonically increase at least once per second"); | |
| 87 | } | |
| 88 | } | |
| 89 | ||
| 90 | #endif /* _COMM_PAGE_CPU_QUIESCENT_COUNTER */ | |
| 91 |