diff options
| author | Sean Christopherson <seanjc@google.com> | 2021-11-11 03:03:08 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-11-16 15:43:27 +0300 |
| commit | f5e8fe2a92e4923b63d1edd6ed53d9856b6515ce (patch) | |
| tree | c854fe4d9faebf34d44107e0d1c143beb367c253 /tools/testing/selftests | |
| parent | a5ac0fd1b90ae811ba51da6a9928633bddefb792 (diff) | |
| download | linux-f5e8fe2a92e4923b63d1edd6ed53d9856b6515ce.tar.xz | |
KVM: selftests: Create VM with adjusted number of guest pages for perf tests
Use the already computed guest_num_pages when creating the so called
extra VM pages for a perf test, and add a comment explaining why the
pages are allocated as extra pages.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20211111000310.1435032-11-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/perf_test_util.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/testing/selftests/kvm/lib/perf_test_util.c b/tools/testing/selftests/kvm/lib/perf_test_util.c index a0aded8cfce3..b3154b5b0cfd 100644 --- a/tools/testing/selftests/kvm/lib/perf_test_util.c +++ b/tools/testing/selftests/kvm/lib/perf_test_util.c @@ -77,9 +77,13 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int vcpus, "Guest memory cannot be evenly divided into %d slots.", slots); + /* + * Pass guest_num_pages to populate the page tables for test memory. + * The memory is also added to memslot 0, but that's a benign side + * effect as KVM allows aliasing HVAs in meslots. + */ vm = vm_create_with_vcpus(mode, vcpus, DEFAULT_GUEST_PHY_PAGES, - (vcpus * vcpu_memory_bytes) / pta->guest_page_size, - 0, guest_code, NULL); + guest_num_pages, 0, guest_code, NULL); pta->vm = vm; |