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[70.52.229.124]) by smtp.gmail.com with ESMTPSA id u18-20020a0cdd12000000b005e1235e6f2esm10911718qvk.12.2023.05.03.16.38.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 May 2023 16:38:14 -0700 (PDT) From: Peter Xu To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: peterx@redhat.com, Paolo Bonzini , Sean Christopherson , James Houghton , Anish Moorthy Subject: [PATCH] selftests/kvm: Allow specify physical cpu list in demand paging test Date: Wed, 3 May 2023 19:38:12 -0400 Message-Id: <20230503233812.2743269-1-peterx@redhat.com> X-Mailer: git-send-email 2.39.1 MIME-Version: 1.0 X-Spam-Status: No, score=-2.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1764919039189585544?= X-GMAIL-MSGID: =?utf-8?q?1764919039189585544?= Mimic dirty log test to allow specify physical cpu pinning for vcpu threads. Signed-off-by: Peter Xu --- 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;