[PATCH v9 0/7] dirty_log_perf_test vCPU pinning

[Vipin Sharma]

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.

While at it, I changed following:

1. atoi() replaced with atoi_paranoid(), atoi_positive and
   atoi_non_negative()
2. Sorted the command line options alphabetically in
   dirty_log_perf_test.
3. Added the missing break between -e and -g in dirty_log_perf_test.c
4. Replaced size_1gb in max_guest_memory_test.c with SZ_* macros from
   sizes.h.
5. Shortened the test args name in memslot_modification_stress_test.c

v9:
- Changed commit message of patch 4.
- Changed some line wrapping in memslot_modification_stress_test.c
- Added Reviewed-by and Suggested-by.

v8: https://lore.kernel.org/lkml/20221102232737.1351745-1-vipinsh@xxxxxxxxxx/
- Changed atoi_positive() and atoi_non_negative() to accept variable name also.
- Moved atoi_positive() and atoi_non_negative() definition to test_util.h
- Removed new line character from TEST_ASSERT() statements.
- Using official SZ_1G from sizes.h header file in max_guest_memory_test.c
- Shortened test args name in memslot_modification_stress_test.c

v7: https://lore.kernel.org/lkml/20221031173819.1035684-1-vipinsh@xxxxxxxxxx/
- 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@xxxxxxxxxx/
- 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@xxxxxxxxxx/
- 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@xxxxxxxxxx/
- 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@xxxxxxxxxx
- 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@xxxxxxxxxx/
- 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@xxxxxxxxxx


Vipin Sharma (7):
  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: Use SZ_* macros from sizes.h in
    max_guest_memory_test.c
  KVM: selftests: Shorten the test args in
    memslot_modification_stress_test.c
  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 | 18 ++++++
 .../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   | 19 ++++++
 .../selftests/kvm/max_guest_memory_test.c     | 21 +++---
 .../kvm/memslot_modification_stress_test.c    | 22 +++----
 .../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 |  5 +-
 18 files changed, 190 insertions(+), 98 deletions(-)

-- 
2.38.1.273.g43a17bfeac-goog