kernel/tools/testing/selftests/kvm/include/test_util.h, branch linux-5.11.y

KVM: selftests: Introduce the dirty log perf test

2020-11-08T11:04:08Z

The dirty log perf test will time verious dirty logging operations (enabling dirty logging, dirtying memory, getting the dirty log, clearing the dirty log, and disabling dirty logging) in order to quantify dirty logging performance. This test can be used to inform future performance improvements to KVM's dirty logging infrastructure. This series was tested by running the following invocations on an Intel Skylake machine: dirty_log_perf_test -b 20m -i 100 -v 64 dirty_log_perf_test -b 20g -i 5 -v 4 dirty_log_perf_test -b 4g -i 5 -v 32 demand_paging_test -b 20m -v 64 demand_paging_test -b 20g -v 4 demand_paging_test -b 4g -v 32 All behaved as expected. Signed-off-by: Ben Gardon Message-Id: <20201027233733.1484855-6-bgardon@google.com> Signed-off-by: Paolo Bonzini

KVM: selftests: Simplify demand_paging_test with timespec_diff_now

2020-11-08T11:03:35Z

Add a helper function to get the current time and return the time since a given start time. Use that function to simplify the timekeeping in the demand paging test. This series was tested by running the following invocations on an Intel Skylake machine: dirty_log_perf_test -b 20m -i 100 -v 64 dirty_log_perf_test -b 20g -i 5 -v 4 dirty_log_perf_test -b 4g -i 5 -v 32 demand_paging_test -b 20m -v 64 demand_paging_test -b 20g -v 4 demand_paging_test -b 4g -v 32 All behaved as expected. Signed-off-by: Ben Gardon Message-Id: <20201027233733.1484855-4-bgardon@google.com> Signed-off-by: Paolo Bonzini

KVM: selftests: Rework timespec functions and usage

2020-03-18T13:08:56Z

The steal_time test's timespec stop condition was wrong and should have used the timespec functions instead to avoid being wrong, but timespec_diff had a strange interface. Rework all the timespec API and its use. Signed-off-by: Andrew Jones Signed-off-by: Paolo Bonzini

selftests: kvm: Introduce the TEST_FAIL macro

2020-03-16T16:59:10Z

Some tests/utilities use the TEST_ASSERT(false, ...) pattern to indicate a failure and stop execution. This change introduces the TEST_FAIL macro which is a wrap around TEST_ASSERT(false, ...) and so provides a direct alternative for failing a test. Signed-off-by: Wainer dos Santos Moschetta Signed-off-by: Paolo Bonzini

KVM: selftests: Introduce steal-time test

2020-03-16T16:59:07Z

The steal-time test confirms what is reported to the guest as stolen time is consistent with the run_delay reported for the VCPU thread on the host. Both x86_64 and AArch64 have the concept of steal/stolen time so this test is introduced for both architectures. While adding the test we ensure .gitignore has all tests listed (it was missing s390x/resets) and that the Makefile has all tests listed in alphabetical order (not really necessary, but it almost was already...). We also extend the common API with a new num-guest- pages call and a new timespec call. Signed-off-by: Andrew Jones Signed-off-by: Paolo Bonzini

KVM: selftests: Use consistent message for test skipping

2020-03-16T16:59:05Z

Signed-off-by: Andrew Jones Signed-off-by: Paolo Bonzini

KVM: selftests: Enable printf format warnings for TEST_ASSERT

2020-03-16T16:59:04Z

Use the format attribute to enable printf format warnings, and then fix them all. Signed-off-by: Andrew Jones Signed-off-by: Paolo Bonzini

KVM: selftests: Rework debug message printing

2020-03-16T16:57:06Z

There were a few problems with the way we output "debug" messages. The first is that we used DEBUG() which is defined when NDEBUG is not defined, but NDEBUG will never be defined for kselftests because it relies too much on assert(). The next is that most of the DEBUG() messages were actually "info" messages, which users may want to turn off if they just want a silent test that either completes or asserts. Finally, a debug message output from a library function, and thus for all tests, was annoying when its information wasn't interesting for a test. Rework these messages so debug messages only output when DEBUG is defined and info messages output unless QUIET is defined. Also name the functions pr_debug and pr_info and make sure that when they're disabled we eat all the inputs. The later avoids unused variable warnings when the variables were only defined for the purpose of printing. Signed-off-by: Andrew Jones Signed-off-by: Paolo Bonzini

KVM: selftests: Time guest demand paging

2020-03-16T16:57:05Z

In order to quantify demand paging performance, time guest execution during demand paging. Signed-off-by: Ben Gardon [Move timespec-diff to test_util.h] Signed-off-by: Andrew Jones Signed-off-by: Paolo Bonzini

KVM: selftests: Add memory size parameter to the demand paging test

2020-03-16T16:57:02Z

Add an argument to allow the demand paging test to work on larger and smaller guest sizes. Signed-off-by: Ben Gardon [Rewrote parse_size() to simplify and provide user more flexibility as to how sizes are input. Also fixed size overflow assert.] Signed-off-by: Andrew Jones Signed-off-by: Paolo Bonzini