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KVM: selftests: Disable dirty logging with vCPUs running

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Disabling dirty logging is much more intestesting from a testing
perspective if the vCPUs are still running. This also excercises the
code-path in which collapsible SPTEs must be faulted back in at a higher
level after disabling dirty logging.

To: linux-kselftest@vger.kernel.org
CC: Peter Xu <peterx@redhat.com>
CC: Andrew Jones <drjones@redhat.com>
CC: Thomas Huth <thuth@redhat.com>
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20210202185734.1680553-29-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Ben Gardon 2021-02-02 10:57:34 -08:00 committed by Paolo Bonzini
parent 9e965bb75a
commit c1d1650f55
1 changed files with 5 additions and 5 deletions
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10
tools/testing/selftests/kvm/dirty_log_perf_test.c
View file

@ -211,11 +211,6 @@ static void run_test(enum vm_guest_mode mode, void *arg)
}
}
/* Tell the vcpu thread to quit */
host_quit = true;
for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++)
pthread_join(vcpu_threads[vcpu_id], NULL);
/* Disable dirty logging */
clock_gettime(CLOCK_MONOTONIC, &start);
vm_mem_region_set_flags(vm, PERF_TEST_MEM_SLOT_INDEX, 0);
@ -223,6 +218,11 @@ static void run_test(enum vm_guest_mode mode, void *arg)
pr_info("Disabling dirty logging time: %ld.%.9lds\n",
ts_diff.tv_sec, ts_diff.tv_nsec);
/* Tell the vcpu thread to quit */
host_quit = true;
for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++)
pthread_join(vcpu_threads[vcpu_id], NULL);
avg = timespec_div(get_dirty_log_total, p->iterations);
pr_info("Get dirty log over %lu iterations took %ld.%.9lds. (Avg %ld.%.9lds/iteration)\n",
p->iterations, get_dirty_log_total.tv_sec,