diff options
| author | Colton Lewis <coltonlewis@google.com> | 2022-11-07 18:22:08 +0000 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2022-11-16 10:57:22 -0800 |
| commit | c967a4752ac66cc0ef8c0b1f4914151ca8758709 (patch) | |
| tree | 623ba8abeeee88b27b7484ff7ab7fd349df4e948 /tools/testing/selftests/kvm/include | |
| parent | 6864c6442f4dfa02c7cf48199cf3ea6bb1fe74ed (diff) | |
KVM: selftests: randomize page access order
Create the ability to randomize page access order with the -a
argument. This includes the possibility that the same pages may be hit
multiple times during an iteration or not at all.
Population has random access as false to ensure all pages will be
touched by population and avoid page faults in late dirty memory that
would pollute the test results.
Signed-off-by: Colton Lewis <coltonlewis@google.com>
Reviewed-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20221107182208.479157-5-coltonlewis@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'tools/testing/selftests/kvm/include')
| -rw-r--r-- | tools/testing/selftests/kvm/include/perf_test_util.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/include/perf_test_util.h b/tools/testing/selftests/kvm/include/perf_test_util.h index 6470ca0fec4c..75ca679059dc 100644 --- a/tools/testing/selftests/kvm/include/perf_test_util.h +++ b/tools/testing/selftests/kvm/include/perf_test_util.h @@ -40,6 +40,8 @@ struct perf_test_args { /* Run vCPUs in L2 instead of L1, if the architecture supports it. */ bool nested; + /* Randomize which pages are accessed by the guest. */ + bool random_access; /* True if all vCPUs are pinned to pCPUs */ bool pin_vcpus; /* The vCPU=>pCPU pinning map. Only valid if pin_vcpus is true. */ @@ -58,6 +60,7 @@ void perf_test_destroy_vm(struct kvm_vm *vm); void perf_test_set_write_percent(struct kvm_vm *vm, uint32_t write_percent); void perf_test_set_random_seed(struct kvm_vm *vm, uint32_t random_seed); +void perf_test_set_random_access(struct kvm_vm *vm, bool random_access); void perf_test_start_vcpu_threads(int vcpus, void (*vcpu_fn)(struct perf_test_vcpu_args *)); void perf_test_join_vcpu_threads(int vcpus); |