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authorAndrew Jones <drjones@redhat.com>2020-11-05 00:23:53 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2020-11-08 14:04:03 +0300
commit3be18630954672b889186e7be9b631f00134e954 (patch)
treec0012987f30181b2eff78dd66e440dac4fe13f9f /tools
parent6769155fece2100506e22161945712afae61769f (diff)
downloadlinux-3be18630954672b889186e7be9b631f00134e954.tar.xz
KVM: selftests: Make the number of vcpus global
We also check the input number of vcpus against the maximum supported. Signed-off-by: Andrew Jones <drjones@redhat.com> Message-Id: <20201104212357.171559-8-drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/kvm/demand_paging_test.c37
-rw-r--r--tools/testing/selftests/kvm/include/perf_test_util.h3
2 files changed, 20 insertions, 20 deletions
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index 33acd954a298..3d96a7bfaff3 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -249,7 +249,7 @@ static int setup_demand_paging(struct kvm_vm *vm,
}
static void run_test(enum vm_guest_mode mode, bool use_uffd,
- useconds_t uffd_delay, int vcpus)
+ useconds_t uffd_delay)
{
pthread_t *vcpu_threads;
pthread_t *uffd_handler_threads = NULL;
@@ -261,7 +261,7 @@ static void run_test(enum vm_guest_mode mode, bool use_uffd,
int vcpu_id;
int r;
- vm = create_vm(mode, vcpus, guest_percpu_mem_size);
+ vm = create_vm(mode, nr_vcpus, guest_percpu_mem_size);
perf_test_args.wr_fract = 1;
@@ -270,23 +270,23 @@ static void run_test(enum vm_guest_mode mode, bool use_uffd,
"Failed to allocate buffer for guest data pattern");
memset(guest_data_prototype, 0xAB, perf_test_args.host_page_size);
- vcpu_threads = malloc(vcpus * sizeof(*vcpu_threads));
+ vcpu_threads = malloc(nr_vcpus * sizeof(*vcpu_threads));
TEST_ASSERT(vcpu_threads, "Memory allocation failed");
- add_vcpus(vm, vcpus, guest_percpu_mem_size);
+ add_vcpus(vm, nr_vcpus, guest_percpu_mem_size);
if (use_uffd) {
uffd_handler_threads =
- malloc(vcpus * sizeof(*uffd_handler_threads));
+ malloc(nr_vcpus * sizeof(*uffd_handler_threads));
TEST_ASSERT(uffd_handler_threads, "Memory allocation failed");
- uffd_args = malloc(vcpus * sizeof(*uffd_args));
+ uffd_args = malloc(nr_vcpus * sizeof(*uffd_args));
TEST_ASSERT(uffd_args, "Memory allocation failed");
- pipefds = malloc(sizeof(int) * vcpus * 2);
+ pipefds = malloc(sizeof(int) * nr_vcpus * 2);
TEST_ASSERT(pipefds, "Unable to allocate memory for pipefd");
- for (vcpu_id = 0; vcpu_id < vcpus; vcpu_id++) {
+ for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++) {
vm_paddr_t vcpu_gpa;
void *vcpu_hva;
@@ -322,7 +322,7 @@ static void run_test(enum vm_guest_mode mode, bool use_uffd,
clock_gettime(CLOCK_MONOTONIC, &start);
- for (vcpu_id = 0; vcpu_id < vcpus; vcpu_id++) {
+ for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++) {
pthread_create(&vcpu_threads[vcpu_id], NULL, vcpu_worker,
&perf_test_args.vcpu_args[vcpu_id]);
}
@@ -330,7 +330,7 @@ static void run_test(enum vm_guest_mode mode, bool use_uffd,
pr_info("Started all vCPUs\n");
/* Wait for the vcpu threads to quit */
- for (vcpu_id = 0; vcpu_id < vcpus; vcpu_id++) {
+ for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++) {
pthread_join(vcpu_threads[vcpu_id], NULL);
PER_VCPU_DEBUG("Joined thread for vCPU %d\n", vcpu_id);
}
@@ -343,7 +343,7 @@ static void run_test(enum vm_guest_mode mode, bool use_uffd,
char c;
/* Tell the user fault fd handler threads to quit */
- for (vcpu_id = 0; vcpu_id < vcpus; vcpu_id++) {
+ for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++) {
r = write(pipefds[vcpu_id * 2 + 1], &c, 1);
TEST_ASSERT(r == 1, "Unable to write to pipefd");
@@ -354,7 +354,7 @@ static void run_test(enum vm_guest_mode mode, bool use_uffd,
pr_info("Total guest execution time: %ld.%.9lds\n",
ts_diff.tv_sec, ts_diff.tv_nsec);
pr_info("Overall demand paging rate: %f pgs/sec\n",
- perf_test_args.vcpu_args[0].pages * vcpus /
+ perf_test_args.vcpu_args[0].pages * nr_vcpus /
((double)ts_diff.tv_sec + (double)ts_diff.tv_nsec / 100000000.0));
ucall_uninit(vm);
@@ -409,8 +409,8 @@ static void help(char *name)
int main(int argc, char *argv[])
{
+ int max_vcpus = kvm_check_cap(KVM_CAP_MAX_VCPUS);
bool mode_selected = false;
- int vcpus = 1;
unsigned int mode;
int opt, i;
bool use_uffd = false;
@@ -462,12 +462,9 @@ int main(int argc, char *argv[])
guest_percpu_mem_size = parse_size(optarg);
break;
case 'v':
- vcpus = atoi(optarg);
- TEST_ASSERT(vcpus > 0,
- "Must have a positive number of vCPUs");
- TEST_ASSERT(vcpus <= MAX_VCPUS,
- "This test does not currently support\n"
- "more than %d vCPUs.", MAX_VCPUS);
+ nr_vcpus = atoi(optarg);
+ TEST_ASSERT(nr_vcpus > 0 && nr_vcpus <= max_vcpus,
+ "Invalid number of vcpus, must be between 1 and %d", max_vcpus);
break;
case 'h':
default:
@@ -482,7 +479,7 @@ int main(int argc, char *argv[])
TEST_ASSERT(guest_modes[i].supported,
"Guest mode ID %d (%s) not supported.",
i, vm_guest_mode_string(i));
- run_test(i, use_uffd, uffd_delay, vcpus);
+ run_test(i, use_uffd, uffd_delay);
}
return 0;
diff --git a/tools/testing/selftests/kvm/include/perf_test_util.h b/tools/testing/selftests/kvm/include/perf_test_util.h
index 840dc2a19ce1..05eeb5d2bfc4 100644
--- a/tools/testing/selftests/kvm/include/perf_test_util.h
+++ b/tools/testing/selftests/kvm/include/perf_test_util.h
@@ -37,6 +37,9 @@ static uint64_t guest_test_phys_mem;
static uint64_t guest_test_virt_mem = DEFAULT_GUEST_TEST_MEM;
static uint64_t guest_percpu_mem_size = DEFAULT_PER_VCPU_MEM_SIZE;
+/* Number of VCPUs for the test */
+static int nr_vcpus = 1;
+
struct vcpu_args {
uint64_t gva;
uint64_t pages;