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d9fee4dcbb
Mostly we write and read large chunks of data which will make it likely that the data is no longer in the cache when we come to verify it. But this is not always true, and in any case, we shouldn't rely on it.
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef TEST_HELPER_H
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#define TEST_HELPER_H
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/*
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* Provides some common definitions and helper functions for the memory
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* tests.
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*
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* Copyright (C) 2020-2021 Martin Whitaker.
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include "test.h"
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/*
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* Test word atomic read and write functions.
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*/
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#ifdef __x86_64__
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#include "memrw64.h"
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#define read_word read64
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#define write_word write64
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#else
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#include "memrw32.h"
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#define read_word read32
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#define write_word write32
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#endif
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/*
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* A wrapper for guiding branch prediction.
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*/
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#define unlikely(x) __builtin_expect(!!(x), 0)
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/*
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* The block size processed between each update of the progress bars and
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* spinners. This also affects how quickly the program will respond to the
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* keyboard.
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*/
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#define SPIN_SIZE (1 << 27) // in testwords
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/*
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* A macro to perform test bailout when requested.
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*/
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#define BAILOUT if (bail) return ticks
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/*
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* Returns value rounded down to the nearest multiple of align_size.
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*/
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static inline uintptr_t round_down(uintptr_t value, size_t align_size)
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{
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return value & ~(align_size - 1);
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}
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/*
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* Returns value rounded up to the nearest multiple of align_size.
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*/
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static inline uintptr_t round_up(uintptr_t value, size_t align_size)
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{
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return (value + (align_size - 1)) & ~(align_size - 1);
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}
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/*
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* Seeds the psuedo-random number generator for my_vcpu.
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*/
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void random_seed(int my_vcpu, uint64_t seed);
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/*
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* Returns a psuedo-random number for my_vcpu. The sequence of numbers returned
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* is repeatable for a given starting seed. The sequence repeats after 2^64 - 1
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* numbers. Within that period, no number is repeated.
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*/
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testword_t random(int my_vcpu);
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/*
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* Calculates the start and end word address for the chunk of segment that is
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* to be tested by my_vcpu. The chunk start will be aligned to a multiple of
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* chunk_align.
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*/
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void calculate_chunk(testword_t **start, testword_t **end, int my_vcpu, int segment, size_t chunk_align);
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/*
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* Flushes the CPU caches. If SMP is enabled, synchronises the threads before
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* and after issuing the cache flush instruction.
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*/
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void flush_caches(int my_vcpu);
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#endif // TEST_HELPER_H
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