On Thu, Jan 23, 2020 at 10:04:34AM -0800, Ben Gardon wrote:
In order to quantify demand paging performance, time guest execution during demand paging.
Signed-off-by: Ben Gardon bgardon@google.com
.../selftests/kvm/demand_paging_test.c | 68 +++++++++++++++++++ 1 file changed, 68 insertions(+)
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c index 2002032df32cc..0dc5d04718678 100644 --- a/tools/testing/selftests/kvm/demand_paging_test.c +++ b/tools/testing/selftests/kvm/demand_paging_test.c @@ -32,6 +32,12 @@ #define DEFAULT_GUEST_TEST_MEM_SIZE (1 << 30) /* 1G */ +#ifdef PRINT_PER_PAGE_UPDATES +#define PER_PAGE_DEBUG(...) DEBUG(__VA_ARGS__) +#else +#define PER_PAGE_DEBUG(...) +#endif
#ifdef PRINT_PER_VCPU_UPDATES #define PER_VCPU_DEBUG(...) DEBUG(__VA_ARGS__) #else @@ -64,6 +70,26 @@ static uint64_t guest_test_phys_mem; */ static uint64_t guest_test_virt_mem = DEFAULT_GUEST_TEST_MEM; +int64_t to_ns(struct timespec ts) +{
- return (int64_t)ts.tv_nsec + 1000000000LL * (int64_t)ts.tv_sec;
+}
+struct timespec diff(struct timespec start, struct timespec end) +{
- struct timespec temp;
- if ((end.tv_nsec-start.tv_nsec) < 0) {
spaces around the '-' would be nice
temp.tv_sec = end.tv_sec - start.tv_sec - 1;temp.tv_nsec = 1000000000 + end.tv_nsec - start.tv_nsec;- } else {
temp.tv_sec = end.tv_sec - start.tv_sec;temp.tv_nsec = end.tv_nsec - start.tv_nsec;- }
- return temp;
+}
Could probably add these new time utilities to the new test_util.c
Thanks, drew