Hi Ilya, Em qua., 23 de ago. de 2023 às 13:45, Ilya Maximets <i.maxim...@ovn.org> escreveu:
> On 8/23/23 07:59, Roberto Bartzen Acosta wrote: > > Hi Ilya, > > > > Regarding what we've been talking about on the openvswitch IRC > channel, I'm adding more information about the setup. > > Hi, Roberto. > Thanks for the information! > > > > > *Summary* > > > > Tests with OVN 22.03 version... (Northd / lflow) recompute time: > > 3k routers - 46183ms/3595ms > > 4k routers - 48008ms/4143ms > > 5k routers - 84347ms/8976ms > > > > Tests with OVN 23.03 / OVS 3.1.2 version (Northd / lflow) recompute > time: > > *5k routers - 75532ms/4750ms > > * > > > > ovn-appctl -t ovn-northd coverage/show > > Event coverage, avg rate over last: 5 seconds, last minute, last hour, > hash=ccb8802c: > > hmap_pathological 0.0/sec 0.000/sec 1.3389/sec > total: 13037 > > hmap_expand 0.0/sec 0.000/sec 694.1992/sec > total: 8429618 > > hmap_reserve 0.0/sec 0.000/sec 438.7769/sec > total: 4365281 > > txn_unchanged 0.0/sec 0.000/sec 0.0619/sec > total: 2366 > > txn_incomplete 0.0/sec 0.000/sec 0.0797/sec > total: 997 > > txn_success 0.0/sec 0.000/sec 0.0194/sec > total: 171 > > txn_try_again 0.0/sec 0.000/sec 0.0000/sec > total: 591 > > poll_create_node 2.0/sec 0.333/sec 0.8039/sec > total: 26251 > > poll_zero_timeout 0.0/sec 0.000/sec 0.0219/sec > total: 305 > > seq_change 1.0/sec 0.167/sec 0.3319/sec > total: 9972 > > pstream_open 0.0/sec 0.000/sec 0.0000/sec > total: 1 > > stream_open 0.0/sec 0.000/sec 0.0000/sec > total: 12 > > unixctl_received 0.0/sec 0.000/sec 0.0000/sec > total: 3 > > unixctl_replied 0.0/sec 0.000/sec 0.0000/sec > total: 3 > > util_xalloc 4.0/sec 0.583/sec 145068.3125/sec > total: 23935972424 > > 93 events never hit > > > > * stopwatch/show [1] > > > > Statistics for 'ovnsb_db_run' Total samples: 121 Maximum: 85562 msec > Minimum: 61409 msec 95th percentile: 81893.110630 msec Short term average: > 83914.189203 msec Long term average: 74790.861215 msec > > > > > > * HA_Chassis_Group table [2] > > * Port_Binding [3] > > * NB database and SB database [4] > > > > > > I included the download link for the databases so we can continue with > the recompute time analysis. > > > > What would be possible to improve in this recompute time considering the > 40K entries in Port_Binding? > > AFAICT, northd is doing horribly inefficient recomputation of ref_chassis > column in HA_Chassis_Group table. It's basically number of ports times > number of ha_chassis_groups (equals to the number of routers in your > setup) times number of chassis. On your databases it turns into about > 270 million operations. I re-worked the code locally to not check the > same things over and over again and re-computation of this particular > part went down from 80 seconds to 52 milliseconds on my machine. > That sounds very promising ;) Thank you for your help! I'll be waiting to backport the patch and test in my setup. > > I still need to run some checks to be sure that I'm computing exactly > the same thing that the old code does, after that I'll post the patch. > > We're a little late for the 23.09 release, but I'll try to market this > change as a bug fix, maybe OVN maintainers will agree. :) > > Do you want to be mentioned in a Reported-by tag? > It would be good to keep tracking. > > Also, this email has "[ovs-discuss]" in the name, but ovs-discuss is > not in CC list, which is a little strange. > My bad! I forgot to cc it, it was too late when I sent it ... > Best regards, Ilya Maximets. > > > > > Kind regards, > > Roberto > > > > [1] - > https://drive.google.com/file/d/1I5lfHgDu-ut8MiPjj4MqjdFzyhnZ1IeC/view?usp=drive_link > < > https://drive.google.com/file/d/1I5lfHgDu-ut8MiPjj4MqjdFzyhnZ1IeC/view?usp=drive_link > > > > [2] - > https://drive.google.com/file/d/1f9FHjDlQnSHeLmTPloS-BmqQbdnosklh/view?usp=sharing > < > https://drive.google.com/file/d/1f9FHjDlQnSHeLmTPloS-BmqQbdnosklh/view?usp=sharing > > > > [3] - > https://drive.google.com/file/d/1RC0t0eOy3CCdYgGYLiPANAtvJUJjYwje/view?usp=sharing > < > https://drive.google.com/file/d/1RC0t0eOy3CCdYgGYLiPANAtvJUJjYwje/view?usp=sharing > > > > [4] - > https://drive.google.com/file/d/1YqCMkY2BasvlcUkzHDpttMcasgKd5BBl/view?usp=sharing > < > https://drive.google.com/file/d/1YqCMkY2BasvlcUkzHDpttMcasgKd5BBl/view?usp=sharing > > > > > > > > > > > > > > > > /‘Esta mensagem é direcionada apenas para os endereços constantes no > cabeçalho inicial. Se você não está listado nos endereços constantes no > cabeçalho, pedimos-lhe que desconsidere completamente o conteúdo dessa > mensagem e cuja cópia, encaminhamento e/ou execução das ações citadas estão > imediatamente anuladas e proibidas’./ > > > > / //‘Apesar do Magazine Luiza tomar todas as precauções razoáveis para > assegurar que nenhum vírus esteja presente nesse e-mail, a empresa não > poderá aceitar a responsabilidade por quaisquer perdas ou danos causados > por esse e-mail ou por seus anexos’./ > > > > -- _‘Esta mensagem é direcionada apenas para os endereços constantes no cabeçalho inicial. Se você não está listado nos endereços constantes no cabeçalho, pedimos-lhe que desconsidere completamente o conteúdo dessa mensagem e cuja cópia, encaminhamento e/ou execução das ações citadas estão imediatamente anuladas e proibidas’._ * **‘Apesar do Magazine Luiza tomar todas as precauções razoáveis para assegurar que nenhum vírus esteja presente nesse e-mail, a empresa não poderá aceitar a responsabilidade por quaisquer perdas ou danos causados por esse e-mail ou por seus anexos’.*
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