71d4896619
Add an option to dirty_log_perf_test that configures the vCPUs to run in L2 instead of L1. This makes it possible to benchmark the dirty logging performance of nested virtualization, which is particularly interesting because KVM must shadow L1's EPT/NPT tables. For now this support only works on x86_64 CPUs with VMX. Otherwise passing -n results in the test being skipped. Signed-off-by: David Matlack <dmatlack@google.com> Message-Id: <20220520233249.3776001-11-dmatlack@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
62 lines
1.6 KiB
C
62 lines
1.6 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 <pthread.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 gpa;
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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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/* The starting address and size of the guest test region. */
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uint64_t gpa;
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uint64_t size;
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uint64_t guest_page_size;
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int wr_fract;
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/* Run vCPUs in L2 instead of L1, if the architecture supports it. */
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bool nested;
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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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struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int vcpus,
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uint64_t vcpu_memory_bytes, int slots,
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enum vm_mem_backing_src_type backing_src,
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bool partition_vcpu_memory_access);
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void perf_test_destroy_vm(struct kvm_vm *vm);
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void perf_test_set_wr_fract(struct kvm_vm *vm, int wr_fract);
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void perf_test_start_vcpu_threads(int vcpus, void (*vcpu_fn)(struct perf_test_vcpu_args *));
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void perf_test_join_vcpu_threads(int vcpus);
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void perf_test_guest_code(uint32_t vcpu_id);
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uint64_t perf_test_nested_pages(int nr_vcpus);
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void perf_test_setup_nested(struct kvm_vm *vm, int nr_vcpus);
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#endif /* SELFTEST_KVM_PERF_TEST_UTIL_H */
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