Re: [PATCH 0/5] Add a dirty logging performance test

Paolo Bonzini
2020-11-06T12:48:40Z

On 28/10/20 00:37, Ben Gardon wrote:
> Currently KVM lacks a simple, userspace agnostic, performance benchmark for
> dirty logging. Such a benchmark will be beneficial for ensuring that dirty
> logging performance does not regress, and to give a common baseline for
> validating performance improvements. The dirty log perf test introduced in
> this series builds on aspects of the existing demand paging perf test and
> provides time-based performance metrics for enabling and disabling dirty
> logging, getting the dirty log, and dirtying memory.
>
> While the test currently only has a build target for x86, I expect it will
> work on, or be easily modified to support other architectures.
>
> Ben Gardon (5):
> KVM: selftests: Factor code out of demand_paging_test
> KVM: selftests: Remove address rounding in guest code
> KVM: selftests: Simplify demand_paging_test with timespec_diff_now
> KVM: selftests: Add wrfract to common guest code
> KVM: selftests: Introduce the dirty log perf test
>
> tools/testing/selftests/kvm/.gitignore | 1 +
> tools/testing/selftests/kvm/Makefile | 1 +
> .../selftests/kvm/demand_paging_test.c | 230 ++---------
> .../selftests/kvm/dirty_log_perf_test.c | 382 ++++++++++++++++++
> .../selftests/kvm/include/perf_test_util.h | 192 +++++++++
> .../testing/selftests/kvm/include/test_util.h | 2 +
> tools/testing/selftests/kvm/lib/test_util.c | 22 +-
> 7 files changed, 635 insertions(+), 195 deletions(-)
> create mode 100644 tools/testing/selftests/kvm/dirty_log_perf_test.c
> create mode 100644 tools/testing/selftests/kvm/include/perf_test_util.h
>

Queued, thanks.

Paolo