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bh=j428coaIRiHiCDE2P6IQUI8TpAu8vNrqJ4vgCs3KdUw=; b=AREMAd+Mv8nc+EPnBP9Mqwgl3sRZzc3cx7R2QqD8rE3AKfQ8ZKcPpWHzV2Ci8lDYF21fxn /tyL1ge9I2zJdHWYnj/984wcg5jGqrIHP+6vHuEhbstV1D/ZqWWXvm4c5zWexwmpBnvODI 5dWzwo3L95hUrQCp8aAUJ1lLBshGm/8= X-MC-Unique: YDoouwEwPsuPIdc2T-1yAw-1 From: Juan Quintela To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Leonardo Bras , Peter Xu , Juan Quintela Subject: [PULL 06/21] migration: Don't abuse qemu_file transferred for RDMA Date: Tue, 30 May 2023 20:25:16 +0200 Message-Id: <20230530182531.6371-7-quintela@redhat.com> In-Reply-To: <20230530182531.6371-1-quintela@redhat.com> References: <20230530182531.6371-1-quintela@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 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=170.10.129.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.167, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1685471234567100001 Content-Type: text/plain; charset="utf-8" Just create a variable for it, the same way that multifd does. This way it is safe to use for other thread, etc, etc. Reviewed-by: Leonardo Bras Signed-off-by: Juan Quintela Message-Id: <20230515195709.63843-11-quintela@redhat.com> --- migration/migration-stats.h | 4 ++++ migration/migration-stats.c | 5 +++-- migration/rdma.c | 22 ++++++++++++++++++++-- migration/trace-events | 2 +- 4 files changed, 28 insertions(+), 5 deletions(-) diff --git a/migration/migration-stats.h b/migration/migration-stats.h index ac2260e987..2358caad63 100644 --- a/migration/migration-stats.h +++ b/migration/migration-stats.h @@ -89,6 +89,10 @@ typedef struct { * Maximum amount of data we can send in a cycle. */ Stat64 rate_limit_max; + /* + * Number of bytes sent through RDMA. + */ + Stat64 rdma_bytes; /* * Total number of bytes transferred. */ diff --git a/migration/migration-stats.c b/migration/migration-stats.c index f98c8260be..79eea8d865 100644 --- a/migration/migration-stats.c +++ b/migration/migration-stats.c @@ -61,8 +61,9 @@ void migration_rate_reset(QEMUFile *f) uint64_t migration_transferred_bytes(QEMUFile *f) { uint64_t multifd =3D stat64_get(&mig_stats.multifd_bytes); + uint64_t rdma =3D stat64_get(&mig_stats.rdma_bytes); uint64_t qemu_file =3D qemu_file_transferred(f); =20 - trace_migration_transferred_bytes(qemu_file, multifd); - return qemu_file + multifd; + trace_migration_transferred_bytes(qemu_file, multifd, rdma); + return qemu_file + multifd + rdma; } diff --git a/migration/rdma.c b/migration/rdma.c index 2e4dcff1c9..074456f9df 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -2122,9 +2122,18 @@ retry: return -EIO; } =20 + /* + * TODO: Here we are sending something, but we are not + * accounting for anything transferred. The following is = wrong: + * + * stat64_add(&mig_stats.rdma_bytes, sge.length); + * + * because we are using some kind of compression. I + * would think that head.len would be the more similar + * thing to a correct value. + */ stat64_add(&mig_stats.zero_pages, sge.length / qemu_target_page_size()); - return 1; } =20 @@ -2232,8 +2241,17 @@ retry: =20 set_bit(chunk, block->transit_bitmap); stat64_add(&mig_stats.normal_pages, sge.length / qemu_target_page_size= ()); + /* + * We are adding to transferred the amount of data written, but no + * overhead at all. I will asume that RDMA is magicaly and don't + * need to transfer (at least) the addresses where it wants to + * write the pages. Here it looks like it should be something + * like: + * sizeof(send_wr) + sge.length + * but this being RDMA, who knows. + */ + stat64_add(&mig_stats.rdma_bytes, sge.length); ram_transferred_add(sge.length); - qemu_file_credit_transfer(f, sge.length); rdma->total_writes++; =20 return 0; diff --git a/migration/trace-events b/migration/trace-events index cdaef7a1ea..54ae5653fd 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -187,7 +187,7 @@ process_incoming_migration_co_postcopy_end_main(void) "" postcopy_preempt_enabled(bool value) "%d" =20 # migration-stats -migration_transferred_bytes(uint64_t qemu_file, uint64_t multifd) "qemu_fi= le %" PRIu64 " multifd %" PRIu64 +migration_transferred_bytes(uint64_t qemu_file, uint64_t multifd, uint64_t= rdma) "qemu_file %" PRIu64 " multifd %" PRIu64 " RDMA %" PRIu64 =20 # channel.c migration_set_incoming_channel(void *ioc, const char *ioctype) "ioc=3D%p i= octype=3D%s" --=20 2.40.1