* Zheng Chuan (zhengch...@huawei.com) wrote: > Hi, Dave. > > Since qemu 6.0 is open and some patches of this series have been reviewed, > might you have time to continue reviewing rest of them ?
Yes, apologies for not getting further; I'll need to attack it again in the new year; it's quite hard, since I know the RDMA code, but not the multifd code that well, and Juan knows the multifd code but not the RDMA code that well; and it's quite a large series. Dave > On 2020/10/25 10:29, Zheng Chuan wrote: > > > > > > On 2020/10/24 3:02, Dr. David Alan Gilbert wrote: > >> * Zheng Chuan (zhengch...@huawei.com) wrote: > >>> > >>> > >>> On 2020/10/21 17:25, Zhanghailiang wrote: > >>>> Hi zhengchuan, > >>>> > >>>>> -----Original Message----- > >>>>> From: zhengchuan > >>>>> Sent: Saturday, October 17, 2020 12:26 PM > >>>>> To: quint...@redhat.com; dgilb...@redhat.com > >>>>> Cc: Zhanghailiang <zhang.zhanghaili...@huawei.com>; Chenzhendong (alex) > >>>>> <alex.c...@huawei.com>; Xiexiangyou <xiexiang...@huawei.com>; wanghao > >>>>> (O) <wanghao...@huawei.com>; yubihong <yubih...@huawei.com>; > >>>>> fengzhim...@huawei.com; qemu-devel@nongnu.org > >>>>> Subject: [PATCH v3 00/18] Support Multifd for RDMA migration > >>>>> > >>>>> Now I continue to support multifd for RDMA migration based on my > >>>>> colleague > >>>>> zhiming's work:) > >>>>> > >>>>> The previous RFC patches is listed below: > >>>>> v1: > >>>>> https://www.mail-archive.com/qemu-devel@nongnu.org/msg669455.html > >>>>> v2: > >>>>> https://www.mail-archive.com/qemu-devel@nongnu.org/msg679188.html > >>>>> > >>>>> As descried in previous RFC, the RDMA bandwidth is not fully utilized > >>>>> for over > >>>>> 25Gigabit NIC because of single channel for RDMA migration. > >>>>> This patch series is going to support multifd for RDMA migration based > >>>>> on multifd > >>>>> framework. > >>>>> > >>>>> Comparsion is between origion and multifd RDMA migration is re-tested > >>>>> for v3. > >>>>> The VM specifications for migration are as follows: > >>>>> - VM use 4k page; > >>>>> - the number of VCPU is 4; > >>>>> - the total memory is 16Gigabit; > >>>>> - use 'mempress' tool to pressurize VM(mempress 8000 500); > >>>>> - use 25Gigabit network card to migrate; > >>>>> > >>>>> For origin RDMA and MultiRDMA migration, the total migration times of > >>>>> VM are > >>>>> as follows: > >>>>> +++++++++++++++++++++++++++++++++++++++++++++++++ > >>>>> | | NOT rdma-pin-all | rdma-pin-all | > >>>>> +++++++++++++++++++++++++++++++++++++++++++++++++ > >>>>> | origin RDMA | 26 s | 29 s | > >>>>> ------------------------------------------------- > >>>>> | MultiRDMA | 16 s | 17 s | > >>>>> +++++++++++++++++++++++++++++++++++++++++++++++++ > >>>>> > >>>>> Test the multifd RDMA migration like this: > >>>>> virsh migrate --live --multiFd --migrateuri > >>>> > >>>> There is no option '--multiFd' for virsh commands, It seems that, we > >>>> added this private option for internal usage. > >>>> It's better to provide testing method by using qemu commands. > >>>> > >>>> > >>> Hi, Hailiang > >>> Yes, it should be, will update in V4. > >>> > >>> Also, Ping. > >>> > >>> Dave, Juan. > >>> > >>> Any suggestion and comment about this series? Hope this feature could > >>> catch up with qemu 5.2. > >> > >> It's a bit close; I'm not sure if I'll have time to review it on Monday > >> before the pull. > >> > >> Dave > >> > > Yes, it is. > > Then we may wait for next merge window after fully review:) > > > >>>> Thanks. > >>>> > >>>>> rdma://192.168.1.100 [VM] --listen-address 0.0.0.0 > >>>>> qemu+tcp://192.168.1.100/system --verbose > >>>>> > >>>>> v2 -> v3: > >>>>> create multifd ops for both tcp and rdma > >>>>> do not export rdma to avoid multifd code in mess > >>>>> fix build issue for non-rdma > >>>>> fix some codestyle and buggy code > >>>>> > >>>>> Chuan Zheng (18): > >>>>> migration/rdma: add the 'migrate_use_rdma_pin_all' function > >>>>> migration/rdma: judge whether or not the RDMA is used for migration > >>>>> migration/rdma: create multifd_setup_ops for Tx/Rx thread > >>>>> migration/rdma: add multifd_setup_ops for rdma > >>>>> migration/rdma: do not need sync main for rdma > >>>>> migration/rdma: export MultiFDSendParams/MultiFDRecvParams > >>>>> migration/rdma: add rdma field into multifd send/recv param > >>>>> migration/rdma: export getQIOChannel to get QIOchannel in rdma > >>>>> migration/rdma: add multifd_rdma_load_setup() to setup multifd rdma > >>>>> migration/rdma: Create the multifd recv channels for RDMA > >>>>> migration/rdma: record host_port for multifd RDMA > >>>>> migration/rdma: Create the multifd send channels for RDMA > >>>>> migration/rdma: Add the function for dynamic page registration > >>>>> migration/rdma: register memory for multifd RDMA channels > >>>>> migration/rdma: only register the memory for multifd channels > >>>>> migration/rdma: add rdma_channel into Migrationstate field > >>>>> migration/rdma: send data for both rdma-pin-all and NOT rdma-pin-all > >>>>> mode > >>>>> migration/rdma: RDMA cleanup for multifd migration > >>>>> > >>>>> migration/migration.c | 24 +++ > >>>>> migration/migration.h | 11 ++ > >>>>> migration/multifd.c | 97 +++++++++- > >>>>> migration/multifd.h | 24 +++ > >>>>> migration/qemu-file.c | 5 + > >>>>> migration/qemu-file.h | 1 + > >>>>> migration/rdma.c | 503 > >>>>> +++++++++++++++++++++++++++++++++++++++++++++++++- > >>>>> 7 files changed, 653 insertions(+), 12 deletions(-) > >>>>> > >>>>> -- > >>>>> 1.8.3.1 > >>>> > >>>> . > >>>> > >>> > >>> -- > >>> Regards. > >>> Chuan > >>> > > > > -- > Regards. > Chuan > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
