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Add an option to overlap the ranges of memory each vCPU accesses instead of partitioning them. This option will increase the probability of multiple vCPUs faulting on the same page at the same time, and causing interesting races, if there are bugs in the page fault handler or elsewhere in the kernel. Reviewed-by: Jacob Xu <jacobhxu@google.com> Reviewed-by: Makarand Sonare <makarandsonare@google.com> Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20210112214253.463999-6-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* tools/testing/selftests/kvm/include/perf_test_util.h
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*
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* Copyright (C) 2020, Google LLC.
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*/
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#ifndef SELFTEST_KVM_PERF_TEST_UTIL_H
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#define SELFTEST_KVM_PERF_TEST_UTIL_H
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#include "kvm_util.h"
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/* Default guest test virtual memory offset */
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#define DEFAULT_GUEST_TEST_MEM 0xc0000000
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#define DEFAULT_PER_VCPU_MEM_SIZE (1 << 30) /* 1G */
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#define PERF_TEST_MEM_SLOT_INDEX 1
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struct perf_test_vcpu_args {
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uint64_t gva;
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uint64_t pages;
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/* Only used by the host userspace part of the vCPU thread */
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int vcpu_id;
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};
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struct perf_test_args {
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struct kvm_vm *vm;
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uint64_t host_page_size;
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uint64_t guest_page_size;
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int wr_fract;
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struct perf_test_vcpu_args vcpu_args[KVM_MAX_VCPUS];
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};
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extern struct perf_test_args perf_test_args;
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/*
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* Guest physical memory offset of the testing memory slot.
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* This will be set to the topmost valid physical address minus
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* the test memory size.
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*/
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extern uint64_t guest_test_phys_mem;
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struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int vcpus,
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uint64_t vcpu_memory_bytes);
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void perf_test_destroy_vm(struct kvm_vm *vm);
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void perf_test_setup_vcpus(struct kvm_vm *vm, int vcpus,
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uint64_t vcpu_memory_bytes,
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bool partition_vcpu_memory_access);
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#endif /* SELFTEST_KVM_PERF_TEST_UTIL_H */
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