[PATCH v7 0/5] dirty_log_perf_test vCPU pinning

Vipin Sharma
2022-10-31T17:38:29Z

Pin vCPUs to a host physical CPUs (pCPUs) in dirty_log_perf_test and
optionally pin the main application thread to a physical cpu if
provided. All tests based on perf_test_util framework can take advantage
of it if needed.

While at it, I changed atoi() to atoi_paranoid(), atoi_positive,
atoi_non_negative() in other tests, sorted command line options
alphabetically in dirty_log_perf_test, and added break between -e and -g
which was missed in original commit when -e was introduced.

v7:
- Moved pinning APIs from perf_test_util.c to kvm_util.c.
- Missed one atoi() call in aarch64/debug-exceptions.c, changed it to
atoi_positive().

v6: https://lore.kernel.org/lkml/20221021211816.1525201-1-vipinsh@google.com/
- Updated the shortlog of Patch 5.
- Changed formatting of help text of -c in dirty_log_perf_test

v5: https://lore.kernel.org/lkml/20221010220538.1154054-1-vipinsh@google.com/
- Added atoi_postive() and atoi_non_negative() APIs for string parsing.
- Using sched_getaffinity() to verify if a pCPU is allowed or not.
- Changed Suggested-by to add only person came up with original idea of
pinning.
- Updated strings and commit messages.

v4: https://lore.kernel.org/lkml/20221006171133.372359-1-vipinsh@google.com/
- Moved boolean to check vCPUs pinning from perf_test_vcpu_args to
perf_test_args.
- Changed assert statements to make error more descriptive.
- Modified break statement between 'e' and 'g' option in v3 by not copying
dirty_log_manual_caps = 0 to 'e'.

v3: https://lore.kernel.org/lkml/20220826184500.1940077-1-vipinsh@google.com
- Moved atoi_paranoid() to test_util.c and replaced all atoi() usage
with atoi_paranoid()
- Sorted command line options alphabetically.
- Instead of creating a vcpu thread on a specific pcpu the thread will
migrate to the provided pcpu after its creation.
- Decoupled -e and -g option.

v2: https://lore.kernel.org/lkml/20220819210737.763135-1-vipinsh@google.com/
- Removed -d option.
- One cpu list passed as option, cpus for vcpus, followed by
application thread cpu.
- Added paranoid cousin of atoi().

v1: https://lore.kernel.org/lkml/20220817152956.4056410-1-vipinsh@google.com

Vipin Sharma (5):
KVM: selftests: Add missing break between -e and -g option in
dirty_log_perf_test
KVM: selftests: Put command line options in alphabetical order in
dirty_log_perf_test
KVM: selftests: Add atoi_paranoid() to catch errors missed by atoi()
KVM: selftests: Add atoi_positive() and atoi_non_negative() for input
validation
KVM: selftests: Allowing running dirty_log_perf_test on specific CPUs

.../selftests/kvm/aarch64/arch_timer.c | 25 ++------
.../selftests/kvm/aarch64/debug-exceptions.c | 2 +-
.../testing/selftests/kvm/aarch64/vgic_irq.c | 6 +-
.../selftests/kvm/access_tracking_perf_test.c | 2 +-
.../selftests/kvm/demand_paging_test.c | 4 +-
.../selftests/kvm/dirty_log_perf_test.c | 64 +++++++++++++------
.../selftests/kvm/include/kvm_util_base.h | 4 ++
.../selftests/kvm/include/perf_test_util.h | 4 ++
.../testing/selftests/kvm/include/test_util.h | 4 ++
.../selftests/kvm/kvm_page_table_test.c | 4 +-
tools/testing/selftests/kvm/lib/kvm_util.c | 54 ++++++++++++++++
.../selftests/kvm/lib/perf_test_util.c | 8 ++-
tools/testing/selftests/kvm/lib/test_util.c | 35 ++++++++++
.../selftests/kvm/max_guest_memory_test.c | 7 +-
.../kvm/memslot_modification_stress_test.c | 6 +-
.../testing/selftests/kvm/memslot_perf_test.c | 24 ++-----
.../selftests/kvm/set_memory_region_test.c | 2 +-
.../selftests/kvm/x86_64/nx_huge_pages_test.c | 4 +-
18 files changed, 180 insertions(+), 79 deletions(-)

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2.38.1.273.g43a17bfeac-goog