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

[Ben Gardon]

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

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2.29.0.rc2.309.g374f81d7ae-goog