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bh=JQEpxXYDKo25qii7TXS62u3K8NDhEgNMVxi0JvIKVTw=; b=FuIVX6CxKKi+uq31Q+27fm6m2aTh5IFMAHqZ4uavc6lqMYruv2H/+QUtyp3TMMtuFbblL1 OyCCtanCs5ngKMU/IZaFPXRaN55/Ra597t7NkBqYPtNXrhH1zHOP33vLjiOXqiCwul88fO o7HzTA6j0n2rBrAbOCWuVhRsc0OSQU0= X-MC-Unique: Nt8cHhzOM26m8IxKqpesJQ-1 From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, f.ebner@proxmox.com, hreitz@redhat.com, jinpu.wang@ionos.com, peter.maydell@linaro.org, peterx@redhat.com, s.reiter@proxmox.com Subject: [PULL 08/18] migration: Finer grained tracepoints for POSTCOPY_LISTEN Date: Wed, 2 Mar 2022 18:29:26 +0000 Message-Id: <20220302182936.227719-9-dgilbert@redhat.com> In-Reply-To: <20220302182936.227719-1-dgilbert@redhat.com> References: <20220302182936.227719-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: quintela@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1646246699249100001 Content-Type: text/plain; charset="utf-8" From: Peter Xu The enablement of postcopy listening has a few steps, add a few tracepoints= to be there ready for some basic measurements for them. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Peter Xu Message-Id: <20220301083925.33483-3-peterx@redhat.com> Signed-off-by: Dr. David Alan Gilbert --- migration/savevm.c | 9 ++++++++- migration/trace-events | 2 +- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/migration/savevm.c b/migration/savevm.c index 7bb65e1d61..190cc5fc42 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -1948,9 +1948,10 @@ static void *postcopy_ram_listen_thread(void *opaque) static int loadvm_postcopy_handle_listen(MigrationIncomingState *mis) { PostcopyState ps =3D postcopy_state_set(POSTCOPY_INCOMING_LISTENING); - trace_loadvm_postcopy_handle_listen(); Error *local_err =3D NULL; =20 + trace_loadvm_postcopy_handle_listen("enter"); + if (ps !=3D POSTCOPY_INCOMING_ADVISE && ps !=3D POSTCOPY_INCOMING_DISC= ARD) { error_report("CMD_POSTCOPY_LISTEN in wrong postcopy state (%d)", p= s); return -1; @@ -1965,6 +1966,8 @@ static int loadvm_postcopy_handle_listen(MigrationInc= omingState *mis) } } =20 + trace_loadvm_postcopy_handle_listen("after discard"); + /* * Sensitise RAM - can now generate requests for blocks that don't exi= st * However, at this point the CPU shouldn't be running, and the IO @@ -1977,6 +1980,8 @@ static int loadvm_postcopy_handle_listen(MigrationInc= omingState *mis) } } =20 + trace_loadvm_postcopy_handle_listen("after uffd"); + if (postcopy_notify(POSTCOPY_NOTIFY_INBOUND_LISTEN, &local_err)) { error_report_err(local_err); return -1; @@ -1991,6 +1996,8 @@ static int loadvm_postcopy_handle_listen(MigrationInc= omingState *mis) qemu_sem_wait(&mis->listen_thread_sem); qemu_sem_destroy(&mis->listen_thread_sem); =20 + trace_loadvm_postcopy_handle_listen("return"); + return 0; } =20 diff --git a/migration/trace-events b/migration/trace-events index 123cfe79d7..92596c00d8 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -14,7 +14,7 @@ loadvm_handle_cmd_packaged_main(int ret) "%d" loadvm_handle_cmd_packaged_received(int ret) "%d" loadvm_handle_recv_bitmap(char *s) "%s" loadvm_postcopy_handle_advise(void) "" -loadvm_postcopy_handle_listen(void) "" +loadvm_postcopy_handle_listen(const char *str) "%s" loadvm_postcopy_handle_run(void) "" loadvm_postcopy_handle_run_cpu_sync(void) "" loadvm_postcopy_handle_run_vmstart(void) "" --=20 2.35.1