[PATCH] KVM: selftests: use unified time type for comparison

Bibo Mao
2023-07-31T02:24:12Z

With test case kvm_page_table_test, start time is acquired with
time type CLOCK_MONOTONIC_RAW, however end time in function timespec_elapsed
is acquired with time type CLOCK_MONOTONIC. This will cause
inaccurate elapsed time calculation on some platform such as LoongArch.

This patch modified test case kvm_page_table_test, and uses unified
time type CLOCK_MONOTONIC for start time.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
tools/testing/selftests/kvm/kvm_page_table_test.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
index b3b00be1ef82..69f26d80c821 100644
--- a/tools/testing/selftests/kvm/kvm_page_table_test.c
+++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
@@ -200,7 +200,7 @@ static void *vcpu_worker(void *data)
if (READ_ONCE(host_quit))
return NULL;

- clock_gettime(CLOCK_MONOTONIC_RAW, &start);
+ clock_gettime(CLOCK_MONOTONIC, &start);
ret = _vcpu_run(vcpu);
ts_diff = timespec_elapsed(start);

@@ -367,7 +367,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
/* Test the stage of KVM creating mappings */
*current_stage = KVM_CREATE_MAPPINGS;

- clock_gettime(CLOCK_MONOTONIC_RAW, &start);
+ clock_gettime(CLOCK_MONOTONIC, &start);
vcpus_complete_new_stage(*current_stage);
ts_diff = timespec_elapsed(start);

@@ -380,7 +380,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)

*current_stage = KVM_UPDATE_MAPPINGS;

- clock_gettime(CLOCK_MONOTONIC_RAW, &start);
+ clock_gettime(CLOCK_MONOTONIC, &start);
vcpus_complete_new_stage(*current_stage);
ts_diff = timespec_elapsed(start);

@@ -392,7 +392,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)

*current_stage = KVM_ADJUST_MAPPINGS;

- clock_gettime(CLOCK_MONOTONIC_RAW, &start);
+ clock_gettime(CLOCK_MONOTONIC, &start);
vcpus_complete_new_stage(*current_stage);
ts_diff = timespec_elapsed(start);

--
2.27.0