[PATCH 12/15] KVM: selftests: Fill per-vCPU struct during "perf_test" VM creation
From: Sean Christopherson
Date: Wed Feb 10 2021 - 18:13:35 EST
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@xxxxxxxxxx>
---
.../selftests/kvm/demand_paging_test.c | 6 +-
.../selftests/kvm/dirty_log_perf_test.c | 6 +-
.../selftests/kvm/include/perf_test_util.h | 6 +-
.../selftests/kvm/lib/perf_test_util.c | 74 ++++++++++---------
.../kvm/memslot_modification_stress_test.c | 6 +-
5 files changed, 49 insertions(+), 49 deletions(-)
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index b937a65b0e6d..00f2c795b68d 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -267,7 +267,8 @@ 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,
- VM_MEM_SRC_ANONYMOUS);
+ VM_MEM_SRC_ANONYMOUS,
+ p->partition_vcpu_memory_access);
perf_test_args.wr_fract = 1;
@@ -279,9 +280,6 @@ 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->use_uffd) {
uffd_handler_threads =
malloc(nr_vcpus * sizeof(*uffd_handler_threads));
diff --git a/tools/testing/selftests/kvm/dirty_log_perf_test.c b/tools/testing/selftests/kvm/dirty_log_perf_test.c
index 04a2641261be..2c809452eac1 100644
--- a/tools/testing/selftests/kvm/dirty_log_perf_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_perf_test.c
@@ -114,7 +114,8 @@ 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->backing_src);
+ p->backing_src,
+ p->partition_vcpu_memory_access);
perf_test_args.wr_fract = p->wr_fract;
@@ -132,9 +133,6 @@ 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 */
diff --git a/tools/testing/selftests/kvm/include/perf_test_util.h b/tools/testing/selftests/kvm/include/perf_test_util.h
index 223fe6b79a04..3a21e82a0173 100644
--- a/tools/testing/selftests/kvm/include/perf_test_util.h
+++ b/tools/testing/selftests/kvm/include/perf_test_util.h
@@ -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,
- 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 */
diff --git a/tools/testing/selftests/kvm/lib/perf_test_util.c b/tools/testing/selftests/kvm/lib/perf_test_util.c
index 9b0cfdf10772..3aa99365726b 100644
--- a/tools/testing/selftests/kvm/lib/perf_test_util.c
+++ b/tools/testing/selftests/kvm/lib/perf_test_util.c
@@ -47,9 +47,45 @@ static void guest_code(uint32_t vcpu_id)
}
}
+
+static 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;
+ }
+
+ 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,
- 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;
@@ -65,6 +101,7 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int vcpus,
guest_num_pages = vm_adjust_num_guest_pages(mode,
(vcpus * vcpu_memory_bytes) / pta->guest_page_size);
+ vcpu_memory_bytes = (guest_num_pages * pta->guest_page_size) / vcpus;
TEST_ASSERT(vcpu_memory_bytes % getpagesize() == 0,
"Guest memory size is not host page size aligned.");
@@ -106,6 +143,9 @@ 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, 0);
+ perf_test_setup_vcpus(vm, vcpus, vcpu_memory_bytes,
+ partition_vcpu_memory_access);
+
ucall_init(vm, NULL);
return vm;
@@ -116,35 +156,3 @@ 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;
- }
-
- 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));
- }
-}
diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
index b3b8f08e91ad..949822833b6b 100644
--- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
+++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
@@ -98,16 +98,14 @@ 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,
- 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);
--
2.30.0.478.g8a0d178c01-goog