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Fri, 22 Sep 2023 06:56:38 +0000 From: Elena Ufimtseva To: quintela@redhat.com, peterx@redhat.com, leobras@redhat.com Cc: elena.ufimtseva@oracle.com, qemu-devel@nongnu.org Subject: [PATCH 4/4] multifd: reset next_packet_len after sending pages Date: Thu, 21 Sep 2023 23:56:25 -0700 Message-Id: <20230922065625.21848-5-elena.ufimtseva@oracle.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230922065625.21848-1-elena.ufimtseva@oracle.com> References: <20230922065625.21848-1-elena.ufimtseva@oracle.com> X-ClientProxiedBy: BYAPR04CA0003.namprd04.prod.outlook.com (2603:10b6:a03:40::16) To BYAPR10MB2869.namprd10.prod.outlook.com (2603:10b6:a03:85::17) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR10MB2869:EE_|IA1PR10MB7419:EE_ X-MS-Office365-Filtering-Correlation-Id: 149027f4-1158-4aa4-4dda-08dbbb391153 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; 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envelope-from=elena.ufimtseva@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, 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 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sometimes multifd sends just sync packet with no pages (normal_num is 0). In this case the old value is being preserved and being accounted for while only packet_len is being transferred. Reset it to 0 after sending and accounting for. TODO: Fix the same packet ids in the stream. with this patch, there is still an issue with the duplicated packets ids being sent (with different number of pages/flags). See in below multifd_send trace (before this change): multifd_send 394.774 pid=55477 id=0x1 packet_num=0x6f0 normal=0x57 flags=0x1 next_packet_size=0x57000 multifd_send 181.244 pid=55477 id=0x1 packet_num=0x6f0 normal=0x0 flags=0x0 next_packet_size=0x57000 With this commit there are still duplicated packets, but since no pages are being sent with sync flag set, next_packet_size is 0: multifd_send 27.814 pid=18602 id=0x1 packet_num=0x574 normal=0x7b flags=0x1 next_packet_size=0x7b000 multifd_send 136054.792 pid=18602 id=0x1 packet_num=0x574 normal=0x0 flags=0x0 next_packet_size=0x0 If there is a suggestion how to fix this properly, I will be glad to use it. Signed-off-by: Elena Ufimtseva Reviewed-by: Fabiano Rosas --- migration/multifd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/migration/multifd.c b/migration/multifd.c index 3281397b18..8b4e26051b 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -730,6 +730,7 @@ static void *multifd_send_thread(void *opaque) p->next_packet_size + p->packet_len); stat64_add(&mig_stats.transferred, p->next_packet_size + p->packet_len); + p->next_packet_size = 0; qemu_mutex_lock(&p->mutex); p->pending_job--; qemu_mutex_unlock(&p->mutex);