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KVM: selftests: Fill per-vCPU struct during "perf_test" VM creation

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Fill the per-vCPU args when creating the perf_test VM instead of having
the caller do so.  This helps ensure that any adjustments to the number
of pages (and thus vcpu_memory_bytes) are reflected in the per-VM args.
Automatically filling the per-vCPU args will also allow a future patch
to do the sync to the guest during creation.

Signed-off-by: Sean Christopherson <seanjc@google.com>
[Updated access_tracking_perf_test as well.]
Signed-off-by: David Matlack <dmatlack@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Message-Id: <20211111000310.1435032-12-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-11-11 00:03:09 +00:00 committed by Paolo Bonzini
parent f5e8fe2a92
commit cf1d59300a
6 changed files with 45 additions and 54 deletions
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5
tools/testing/selftests/kvm/access_tracking_perf_test.c
View file

@ -332,10 +332,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
int vcpus = params->vcpus;
vm = perf_test_create_vm(mode, vcpus, params->vcpu_memory_bytes, 1,
params->backing_src);
perf_test_setup_vcpus(vm, vcpus, params->vcpu_memory_bytes,
!overlap_memory_access);
params->backing_src, !overlap_memory_access);
vcpu_threads = create_vcpu_threads(vcpus);

5
tools/testing/selftests/kvm/demand_paging_test.c
View file

@ -293,7 +293,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
int r;
vm = perf_test_create_vm(mode, nr_vcpus, guest_percpu_mem_size, 1,
p->src_type);
p->src_type, p->partition_vcpu_memory_access);
perf_test_args.wr_fract = 1;
@ -307,9 +307,6 @@ static void run_test(enum vm_guest_mode mode, void *arg)
vcpu_threads = malloc(nr_vcpus * sizeof(*vcpu_threads));
TEST_ASSERT(vcpu_threads, "Memory allocation failed");
perf_test_setup_vcpus(vm, nr_vcpus, guest_percpu_mem_size,
p->partition_vcpu_memory_access);
if (p->uffd_mode) {
uffd_handler_threads =
malloc(nr_vcpus * sizeof(*uffd_handler_threads));

6
tools/testing/selftests/kvm/dirty_log_perf_test.c
View file

@ -186,7 +186,8 @@ static void run_test(enum vm_guest_mode mode, void *arg)
struct timespec clear_dirty_log_total = (struct timespec){0};
vm = perf_test_create_vm(mode, nr_vcpus, guest_percpu_mem_size,
p->slots, p->backing_src);
p->slots, p->backing_src,
p->partition_vcpu_memory_access);
perf_test_args.wr_fract = p->wr_fract;
@ -206,9 +207,6 @@ static void run_test(enum vm_guest_mode mode, void *arg)
vcpu_threads = malloc(nr_vcpus * sizeof(*vcpu_threads));
TEST_ASSERT(vcpu_threads, "Memory allocation failed");
perf_test_setup_vcpus(vm, nr_vcpus, guest_percpu_mem_size,
p->partition_vcpu_memory_access);
sync_global_to_guest(vm, perf_test_args);
/* Start the iterations */

6
tools/testing/selftests/kvm/include/perf_test_util.h
View file

@ -39,10 +39,8 @@ extern struct perf_test_args perf_test_args;
struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int vcpus,
uint64_t vcpu_memory_bytes, int slots,
enum vm_mem_backing_src_type backing_src);
enum vm_mem_backing_src_type backing_src,
bool partition_vcpu_memory_access);
void perf_test_destroy_vm(struct kvm_vm *vm);
void perf_test_setup_vcpus(struct kvm_vm *vm, int vcpus,
uint64_t vcpu_memory_bytes,
bool partition_vcpu_memory_access);
#endif /* SELFTEST_KVM_PERF_TEST_UTIL_H */

71
tools/testing/selftests/kvm/lib/perf_test_util.c
View file

@ -48,9 +48,43 @@ static void guest_code(uint32_t vcpu_id)
}
}
void perf_test_setup_vcpus(struct kvm_vm *vm, int vcpus,
uint64_t vcpu_memory_bytes,
bool partition_vcpu_memory_access)
{
struct perf_test_args *pta = &perf_test_args;
struct perf_test_vcpu_args *vcpu_args;
int vcpu_id;
for (vcpu_id = 0; vcpu_id < vcpus; vcpu_id++) {
vcpu_args = &pta->vcpu_args[vcpu_id];
vcpu_args->vcpu_id = vcpu_id;
if (partition_vcpu_memory_access) {
vcpu_args->gva = guest_test_virt_mem +
(vcpu_id * vcpu_memory_bytes);
vcpu_args->pages = vcpu_memory_bytes /
pta->guest_page_size;
vcpu_args->gpa = pta->gpa + (vcpu_id * vcpu_memory_bytes);
} else {
vcpu_args->gva = guest_test_virt_mem;
vcpu_args->pages = (vcpus * vcpu_memory_bytes) /
pta->guest_page_size;
vcpu_args->gpa = pta->gpa;
}
vcpu_args_set(vm, vcpu_id, 1, vcpu_id);
pr_debug("Added VCPU %d with test mem gpa [%lx, %lx)\n",
vcpu_id, vcpu_args->gpa, vcpu_args->gpa +
(vcpu_args->pages * pta->guest_page_size));
}
}
struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int vcpus,
uint64_t vcpu_memory_bytes, int slots,
enum vm_mem_backing_src_type backing_src)
enum vm_mem_backing_src_type backing_src,
bool partition_vcpu_memory_access)
{
struct perf_test_args *pta = &perf_test_args;
struct kvm_vm *vm;
@ -119,6 +153,8 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int vcpus,
/* Do mapping for the demand paging memory slot */
virt_map(vm, guest_test_virt_mem, pta->gpa, guest_num_pages);
perf_test_setup_vcpus(vm, vcpus, vcpu_memory_bytes, partition_vcpu_memory_access);
ucall_init(vm, NULL);
return vm;
@ -129,36 +165,3 @@ void perf_test_destroy_vm(struct kvm_vm *vm)
ucall_uninit(vm);
kvm_vm_free(vm);
}
void perf_test_setup_vcpus(struct kvm_vm *vm, int vcpus,
uint64_t vcpu_memory_bytes,
bool partition_vcpu_memory_access)
{
struct perf_test_args *pta = &perf_test_args;
struct perf_test_vcpu_args *vcpu_args;
int vcpu_id;
for (vcpu_id = 0; vcpu_id < vcpus; vcpu_id++) {
vcpu_args = &pta->vcpu_args[vcpu_id];
vcpu_args->vcpu_id = vcpu_id;
if (partition_vcpu_memory_access) {
vcpu_args->gva = guest_test_virt_mem +
(vcpu_id * vcpu_memory_bytes);
vcpu_args->pages = vcpu_memory_bytes /
pta->guest_page_size;
vcpu_args->gpa = pta->gpa + (vcpu_id * vcpu_memory_bytes);
} else {
vcpu_args->gva = guest_test_virt_mem;
vcpu_args->pages = (vcpus * vcpu_memory_bytes) /
pta->guest_page_size;
vcpu_args->gpa = pta->gpa;
}
vcpu_args_set(vm, vcpu_id, 1, vcpu_id);
pr_debug("Added VCPU %d with test mem gpa [%lx, %lx)\n",
vcpu_id, vcpu_args->gpa, vcpu_args->gpa +
(vcpu_args->pages * pta->guest_page_size));
}
}

6
tools/testing/selftests/kvm/memslot_modification_stress_test.c
View file

@ -105,16 +105,14 @@ static void run_test(enum vm_guest_mode mode, void *arg)
int vcpu_id;
vm = perf_test_create_vm(mode, nr_vcpus, guest_percpu_mem_size, 1,
VM_MEM_SRC_ANONYMOUS);
VM_MEM_SRC_ANONYMOUS,
p->partition_vcpu_memory_access);
perf_test_args.wr_fract = 1;
vcpu_threads = malloc(nr_vcpus * sizeof(*vcpu_threads));
TEST_ASSERT(vcpu_threads, "Memory allocation failed");
perf_test_setup_vcpus(vm, nr_vcpus, guest_percpu_mem_size,
p->partition_vcpu_memory_access);
/* Export the shared variables to the guest */
sync_global_to_guest(vm, perf_test_args);