| Message ID | 20210112214253.463999-5-bgardon@google.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 86753bd04c7ca6b551b83c5395dd25e95de99aa4 |
| Headers | show |
| Series | KVM: selftests: Perf test cleanups and memslot modification test | expand |
On Tue, Jan 12, 2021, Ben Gardon wrote: > Currently the population stage in the dirty_log_perf_test does nothing > as the per-vCPU iteration counters are not initialized and the loop does > not wait for each vCPU. Remedy those errors. > > Reviewed-by: Jacob Xu <jacobhxu@google.com> > Reviewed-by: Makarand Sonare <makarandsonare@google.com> > > Signed-off-by: Ben Gardon <bgardon@google.com> > --- > tools/testing/selftests/kvm/dirty_log_perf_test.c | 11 ++++++++--- > 1 file changed, 8 insertions(+), 3 deletions(-) > > diff --git a/tools/testing/selftests/kvm/dirty_log_perf_test.c b/tools/testing/selftests/kvm/dirty_log_perf_test.c > index 3875f22d7283..fb6eb7fa0b45 100644 > --- a/tools/testing/selftests/kvm/dirty_log_perf_test.c > +++ b/tools/testing/selftests/kvm/dirty_log_perf_test.c > @@ -139,14 +139,19 @@ static void run_test(enum vm_guest_mode mode, void *arg) > > clock_gettime(CLOCK_MONOTONIC, &start); > for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++) { > + vcpu_last_completed_iteration[vcpu_id] = -1; > + > pthread_create(&vcpu_threads[vcpu_id], NULL, vcpu_worker, > &perf_test_args.vcpu_args[vcpu_id]); > } > > - /* Allow the vCPU to populate memory */ > + /* Allow the vCPUs to populate memory */ > pr_debug("Starting iteration %d - Populating\n", iteration); > - while (READ_ONCE(vcpu_last_completed_iteration[vcpu_id]) != iteration) > - ; > + for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++) { > + while (READ_ONCE(vcpu_last_completed_iteration[vcpu_id]) != > + iteration) Same comment as earlier. I vote to let this poke out, or shorten the variables so that the lines aren't so long. > + ; > + } > > ts_diff = timespec_elapsed(start); > pr_info("Populate memory time: %ld.%.9lds\n", > -- > 2.30.0.284.gd98b1dd5eaa7-goog >
diff --git a/tools/testing/selftests/kvm/dirty_log_perf_test.c b/tools/testing/selftests/kvm/dirty_log_perf_test.c index 3875f22d7283..fb6eb7fa0b45 100644 --- a/tools/testing/selftests/kvm/dirty_log_perf_test.c +++ b/tools/testing/selftests/kvm/dirty_log_perf_test.c @@ -139,14 +139,19 @@ static void run_test(enum vm_guest_mode mode, void *arg) clock_gettime(CLOCK_MONOTONIC, &start); for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++) { + vcpu_last_completed_iteration[vcpu_id] = -1; + pthread_create(&vcpu_threads[vcpu_id], NULL, vcpu_worker, &perf_test_args.vcpu_args[vcpu_id]); } - /* Allow the vCPU to populate memory */ + /* Allow the vCPUs to populate memory */ pr_debug("Starting iteration %d - Populating\n", iteration); - while (READ_ONCE(vcpu_last_completed_iteration[vcpu_id]) != iteration) - ; + for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++) { + while (READ_ONCE(vcpu_last_completed_iteration[vcpu_id]) != + iteration) + ; + } ts_diff = timespec_elapsed(start); pr_info("Populate memory time: %ld.%.9lds\n",