Mimic dirty log test to allow specify physical cpu pinning for vcpu threads.
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
tools/testing/selftests/kvm/demand_paging_test.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index bdb8e0748154..d709b65fda2f 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -220,12 +220,13 @@ static void run_test(enum vm_guest_mode mode, void *arg)
static void help(char *name)
{
puts("");
- printf("usage: %s [-h] [-m vm_mode] [-u uffd_mode] [-a]\n"
+ printf("usage: %s [-h] [-m vm_mode] [-u uffd_mode] [-a] [-c cpu_list]\n"
" [-d uffd_delay_usec] [-r readers_per_uffd] [-b memory]\n"
" [-s type] [-v vcpus] [-o]\n", name);
guest_modes_help();
printf(" -u: use userfaultfd to handle vCPU page faults. Mode is a\n"
" UFFD registration mode: 'MISSING' or 'MINOR'.\n");
+ printf(" -c: physical cores to pin vcpu threads (e.g. 1,2,3,...)\n");
printf(" -a: Use a single userfaultfd for all of guest memory, instead of\n"
" creating one for each region paged by a unique vCPU\n"
" Set implicitly with -o, and no effect without -u.\n");
@@ -247,6 +248,7 @@ static void help(char *name)
int main(int argc, char *argv[])
{
int max_vcpus = kvm_check_cap(KVM_CAP_MAX_VCPUS);
+ const char *cpulist = NULL;
struct test_params p = {
.src_type = DEFAULT_VM_MEM_SRC,
.partition_vcpu_memory_access = true,
@@ -257,7 +259,7 @@ int main(int argc, char *argv[])
guest_modes_append_default();
- while ((opt = getopt(argc, argv, "ahom:u:d:b:s:v:r:")) != -1) {
+ while ((opt = getopt(argc, argv, "ac:hom:u:d:b:s:v:r:")) != -1) {
switch (opt) {
case 'm':
guest_modes_cmdline(optarg);
@@ -272,6 +274,9 @@ int main(int argc, char *argv[])
case 'a':
p.single_uffd = true;
break;
+ case 'c':
+ cpulist = optarg;
+ break;
case 'd':
p.uffd_delay = strtoul(optarg, NULL, 0);
TEST_ASSERT(p.uffd_delay >= 0, "A negative UFFD delay is not supported.");
@@ -309,6 +314,12 @@ int main(int argc, char *argv[])
TEST_FAIL("userfaultfd MINOR mode requires shared memory; pick a different -s");
}
+ if (cpulist) {
+ kvm_parse_vcpu_pinning(cpulist, memstress_args.vcpu_to_pcpu,
+ nr_vcpus);
+ memstress_args.pin_vcpus = true;
+ }
+
for_each_guest_mode(run_test, &p);
return 0;
--
2.39.1
