diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/perf_test_util.c')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/perf_test_util.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/tools/testing/selftests/kvm/lib/perf_test_util.c b/tools/testing/selftests/kvm/lib/perf_test_util.c index d48ee4f604f0..15000f71cdee 100644 --- a/tools/testing/selftests/kvm/lib/perf_test_util.c +++ b/tools/testing/selftests/kvm/lib/perf_test_util.c @@ -48,10 +48,13 @@ void perf_test_guest_code(uint32_t vcpu_idx) { struct perf_test_args *pta = &perf_test_args; struct perf_test_vcpu_args *vcpu_args = &pta->vcpu_args[vcpu_idx]; + struct guest_random_state rand_state; uint64_t gva; uint64_t pages; int i; + rand_state = new_guest_random_state(pta->random_seed + vcpu_idx); + gva = vcpu_args->gva; pages = vcpu_args->pages; @@ -62,7 +65,7 @@ void perf_test_guest_code(uint32_t vcpu_idx) for (i = 0; i < pages; i++) { uint64_t addr = gva + (i * pta->guest_page_size); - if (i % pta->wr_fract == 0) + if (guest_random_u32(&rand_state) % 100 < pta->write_percent) *(uint64_t *)addr = 0x0123456789ABCDEF; else READ_ONCE(*(uint64_t *)addr); @@ -123,7 +126,7 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int nr_vcpus, pr_info("Testing guest mode: %s\n", vm_guest_mode_string(mode)); /* By default vCPUs will write to memory. */ - pta->wr_fract = 1; + pta->write_percent = 100; /* * Snapshot the non-huge page size. This is used by the guest code to @@ -225,10 +228,10 @@ void perf_test_destroy_vm(struct kvm_vm *vm) kvm_vm_free(vm); } -void perf_test_set_wr_fract(struct kvm_vm *vm, int wr_fract) +void perf_test_set_write_percent(struct kvm_vm *vm, uint32_t write_percent) { - perf_test_args.wr_fract = wr_fract; - sync_global_to_guest(vm, perf_test_args); + perf_test_args.write_percent = write_percent; + sync_global_to_guest(vm, perf_test_args.write_percent); } void perf_test_set_random_seed(struct kvm_vm *vm, uint32_t random_seed) |