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* [PATCH 0/6] KVM: selftests: Perf test cleanups and memslot modification test
@ 2021-01-12 21:42 Ben Gardon
  2021-01-12 21:42 ` [PATCH 1/6] KVM: selftests: Rename timespec_diff_now to timespec_elapsed Ben Gardon
                   ` (6 more replies)
  0 siblings, 7 replies; 13+ messages in thread
From: Ben Gardon @ 2021-01-12 21:42 UTC (permalink / raw)
  To: linux-kernel, kvm, linux-kselftest
  Cc: Paolo Bonzini, Peter Xu, Andrew Jones, Peter Shier,
	Sean Christopherson, Thomas Huth, Jacob Xu, Makarand Sonare,
	Ben Gardon

This series contains a few cleanups that didn't make it into previous
series, including some cosmetic changes and small bug fixes. The series
also lays the groundwork for a memslot modification test which stresses
the memslot update and page fault code paths in an attempt to expose races.

Tested: dirty_log_perf_test, memslot_modification_stress_test, and
	demand_paging_test were run, with all the patches in this series
	applied, on an Intel Skylake machine.

	echo Y > /sys/module/kvm/parameters/tdp_mmu; \
	./memslot_modification_stress_test -i 1000 -v 64 -b 1G; \
	./memslot_modification_stress_test -i 1000 -v 64 -b 64M -o; \
	./dirty_log_perf_test -v 64 -b 1G; \
	./dirty_log_perf_test -v 64 -b 64M -o; \
	./demand_paging_test -v 64 -b 1G; \
	./demand_paging_test -v 64 -b 64M -o; \
	echo N > /sys/module/kvm/parameters/tdp_mmu; \
	./memslot_modification_stress_test -i 1000 -v 64 -b 1G; \
	./memslot_modification_stress_test -i 1000 -v 64 -b 64M -o; \
	./dirty_log_perf_test -v 64 -b 1G; \
	./dirty_log_perf_test -v 64 -b 64M -o; \
	./demand_paging_test -v 64 -b 1G; \
	./demand_paging_test -v 64 -b 64M -o

	The tests behaved as expected, and fixed the problem of the
	population stage being skipped in dirty_log_perf_test. This can be
	seen in the output, with the population stage taking about the time
	dirty pass 1 took and dirty pass 1 falling closer to the times for
	the other passes.

Note that when running these tests, the -o option causes the test to take
much longer as the work each vCPU must do increases proportional to the
number of vCPUs.

You can view this series in Gerrit at:
https://linux-review.googlesource.com/c/linux/kernel/git/torvalds/linux/+/7216

Ben Gardon (6):
  KVM: selftests: Rename timespec_diff_now to timespec_elapsed
  KVM: selftests: Avoid flooding debug log while populating memory
  KVM: selftests: Convert iterations to int in dirty_log_perf_test
  KVM: selftests: Fix population stage in dirty_log_perf_test
  KVM: selftests: Add option to overlap vCPU memory access
  KVM: selftests: Add memslot modification stress test

 tools/testing/selftests/kvm/.gitignore        |   1 +
 tools/testing/selftests/kvm/Makefile          |   1 +
 .../selftests/kvm/demand_paging_test.c        |  40 +++-
 .../selftests/kvm/dirty_log_perf_test.c       |  72 +++---
 .../selftests/kvm/include/perf_test_util.h    |   4 +-
 .../testing/selftests/kvm/include/test_util.h |   2 +-
 .../selftests/kvm/lib/perf_test_util.c        |  25 ++-
 tools/testing/selftests/kvm/lib/test_util.c   |   2 +-
 .../kvm/memslot_modification_stress_test.c    | 211 ++++++++++++++++++
 9 files changed, 307 insertions(+), 51 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/memslot_modification_stress_test.c

-- 
2.30.0.284.gd98b1dd5eaa7-goog


^ permalink raw reply	[flat|nested] 13+ messages in thread

end of thread, other threads:[~2021-01-18 18:20 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-01-12 21:42 [PATCH 0/6] KVM: selftests: Perf test cleanups and memslot modification test Ben Gardon
2021-01-12 21:42 ` [PATCH 1/6] KVM: selftests: Rename timespec_diff_now to timespec_elapsed Ben Gardon
2021-01-12 21:42 ` [PATCH 2/6] KVM: selftests: Avoid flooding debug log while populating memory Ben Gardon
2021-01-13  7:37   ` Thomas Huth
2021-01-16  0:00   ` Sean Christopherson
2021-01-12 21:42 ` [PATCH 3/6] KVM: selftests: Convert iterations to int in dirty_log_perf_test Ben Gardon
2021-01-13  7:39   ` Thomas Huth
2021-01-12 21:42 ` [PATCH 4/6] KVM: selftests: Fix population stage " Ben Gardon
2021-01-16  0:02   ` Sean Christopherson
2021-01-12 21:42 ` [PATCH 5/6] KVM: selftests: Add option to overlap vCPU memory access Ben Gardon
2021-01-12 21:42 ` [PATCH 6/6] KVM: selftests: Add memslot modification stress test Ben Gardon
2021-01-16  0:10   ` Sean Christopherson
2021-01-18 18:18 ` [PATCH 0/6] KVM: selftests: Perf test cleanups and memslot modification test Paolo Bonzini

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