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92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/*
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* Copyright (c) 2018 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Test to validate that _COMM_PAGE_CPU_QUIESCENT_COUNTER ticks at least once per second
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*
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* <rdar://problem/42433973>
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*/
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#include <System/machine/cpu_capabilities.h>
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#include <darwintest.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <sys/sysctl.h>
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T_GLOBAL_META(T_META_RUN_CONCURRENTLY(true));
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#ifndef _COMM_PAGE_CPU_QUIESCENT_COUNTER
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T_DECL(test_quiescent_counter, "Validate that _COMM_PAGE_CPU_QUIESCENT_COUNTER increments",
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T_META_CHECK_LEAKS(false))
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{
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T_SKIP("_COMM_PAGE_CPU_QUIESCENT_COUNTER doesn't exist on this system");
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}
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#else /* _COMM_PAGE_CPU_QUIESCENT_COUNTER */
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T_DECL(test_quiescent_counter, "Validate that _COMM_PAGE_CPU_QUIESCENT_COUNTER increments",
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T_META_CHECK_LEAKS(false))
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{
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int rv;
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uint32_t cpu_checkin_min_interval = 0; /* set by sysctl hw.ncpu */
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size_t value_size = sizeof(cpu_checkin_min_interval);
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rv = sysctlbyname("kern.cpu_checkin_interval", &cpu_checkin_min_interval, &value_size, NULL, 0);
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T_ASSERT_POSIX_SUCCESS(rv, "sysctlbyname(kern.cpu_checkin_interval)");
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T_LOG("kern.cpu_checkin_interval is %d", cpu_checkin_min_interval);
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T_ASSERT_GT(cpu_checkin_min_interval, 0, "kern.cpu_checkin_interval should be > 0");
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COMM_PAGE_SLOT_TYPE(uint64_t) commpage_addr = COMM_PAGE_SLOT(uint64_t, CPU_QUIESCENT_COUNTER);
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T_LOG("address of _COMM_PAGE_CPU_QUIESCENT_COUNTER is %p", commpage_addr);
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uint64_t counter = *commpage_addr;
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uint64_t last_counter = counter;
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T_LOG("first value of _COMM_PAGE_CPU_QUIESCENT_COUNTER is %llu", counter);
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for (int i = 0; i < 10; i++) {
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sleep(1);
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last_counter = counter;
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counter = *commpage_addr;
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T_LOG("value of _COMM_PAGE_CPU_QUIESCENT_COUNTER is %llu", counter);
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T_ASSERT_GT(counter, last_counter, "_COMM_PAGE_CPU_QUIESCENT_COUNTER must monotonically increase at least once per second");
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}
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}
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#endif /* _COMM_PAGE_CPU_QUIESCENT_COUNTER */
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