From: Olaf Hering <olaf@aepfle.de>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: <xen-devel@lists.xenproject.org>,
Ian Jackson <iwj@xenproject.org>, Wei Liu <wl@xen.org>,
Juergen Gross <jgross@suse.com>
Subject: Re: [PATCH v20210701 15/40] tools: prepare to allocate saverestore arrays once
Date: Tue, 13 Jul 2021 19:50:09 +0200 [thread overview]
Message-ID: <20210713195009.3657104f.olaf@aepfle.de> (raw)
In-Reply-To: <6bd5fbb4-881f-e41c-46f5-d31c93a7ff7a@citrix.com>
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Am Mon, 5 Jul 2021 14:01:07 +0100
schrieb Andrew Cooper <andrew.cooper3@citrix.com>:
> > Unfortunately, I'm not able to prove the reported gain with the systems I have today.
> > I'm waiting for preparation of different hardware, right now I have only a pair of CoyotePass and WilsonCity.
> >
> > I'm sure there were NUMA effects involved. Last years libvirt was unable to properly pin vcpus. If I pin all the involved memory to node#0 there is some jitter in the logged numbers, but no obvious improvement. The fist iteration is slightly faster, but that is it.
>
> Oh - so the speedup might not be from reduced data handling?
>
> Avoiding unnecessary data copies is clearly going to improve things,
> even if it isn't 25%.
For HVM the only notable improvement is the initial iteration.
On average with 4 migrations of a single domU from A to B and back from B to A, transfer rate goes up from ~490MiB/s to ~677MiB/s. The initial transfer time for the 4194299 domU pages:
with plain staging:
36.800582009
32.145531727
31.827540709
33.009956041
34.951513466
33.416769973
32.128985762
33.201786076
with the series applied:
24.266428156
24.632898175
24.112660134
23.603475994
24.418323859
23.841875914
25.087779229
23.493812677
Migration of a PV domU is much faster, but transfer rate for each iteration varies with or without the patches being applied.
Olaf
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next prev parent reply other threads:[~2021-07-13 17:50 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-01 9:55 [PATCH v20210701 00/40] leftover from 2020 Olaf Hering
2021-07-01 9:55 ` [PATCH v20210701 01/40] hotplug/Linux: fix starting of xenstored with restarting systemd Olaf Hering
2021-07-01 9:55 ` [PATCH v20210701 02/40] tools: add API to work with sevaral bits at once Olaf Hering
2021-07-01 9:55 ` [PATCH v20210701 03/40] xl: fix description of migrate --debug Olaf Hering
2021-07-01 14:30 ` Anthony PERARD
2021-07-01 14:33 ` Andrew Cooper
2021-07-01 14:40 ` Olaf Hering
2021-07-01 14:41 ` Olaf Hering
2021-07-01 14:49 ` Andrew Cooper
2021-07-01 15:08 ` Olaf Hering
2021-07-01 9:55 ` [PATCH v20210701 04/40] tools: use integer division in convert-legacy-stream Olaf Hering
2021-07-02 15:10 ` Andrew Cooper
2021-07-01 9:56 ` [PATCH v20210701 05/40] tools: handle libxl__physmap_info.name properly " Olaf Hering
2021-07-02 15:35 ` Andrew Cooper
2021-07-01 9:56 ` [PATCH v20210701 06/40] tools: fix Python3.4 TypeError in format string Olaf Hering
2021-07-02 16:19 ` Marek Marczykowski-Górecki
2021-07-02 16:39 ` Andrew Cooper
2021-07-05 8:18 ` Olaf Hering
2021-07-05 9:47 ` Andrew Cooper
2021-07-05 8:07 ` Olaf Hering
2021-07-05 10:10 ` Andrew Cooper
2021-07-01 9:56 ` [PATCH v20210701 07/40] tools: create libxensaverestore Olaf Hering
2021-07-09 9:20 ` Olaf Hering
2021-07-09 9:31 ` Julien Grall
2021-07-09 9:33 ` Olaf Hering
2021-07-09 9:35 ` Julien Grall
2021-07-01 9:56 ` [PATCH v20210701 08/40] MAINTAINERS: add myself as saverestore maintainer Olaf Hering
2021-07-01 10:39 ` Jan Beulich
2021-07-01 11:01 ` Olaf Hering
2021-07-01 11:40 ` Julien Grall
2021-07-01 12:00 ` Olaf Hering
2021-07-01 12:09 ` Julien Grall
2021-07-01 9:56 ` [PATCH v20210701 09/40] tools: add readv_exact to libxenctrl Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 10/40] tools: add xc_is_known_page_type " Olaf Hering
2021-07-02 19:20 ` Andrew Cooper
2021-07-05 8:22 ` Olaf Hering
2021-07-05 9:51 ` Andrew Cooper
2021-07-05 14:24 ` Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 11/40] tools: use sr_is_known_page_type Olaf Hering
2021-07-02 19:27 ` Andrew Cooper
2021-07-05 8:25 ` Olaf Hering
2021-07-05 9:53 ` Andrew Cooper
2021-07-01 9:56 ` [PATCH v20210701 12/40] tools: unify type checking for data pfns in migration stream Olaf Hering
2021-07-02 19:43 ` Andrew Cooper
2021-07-05 8:59 ` Olaf Hering
2021-07-05 9:53 ` Andrew Cooper
2021-07-05 13:10 ` Andrew Cooper
2021-07-05 13:53 ` Olaf Hering
2021-07-05 18:54 ` Andrew Cooper
2021-07-05 19:06 ` Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 13/40] " Olaf Hering
2021-07-02 19:49 ` Andrew Cooper
2021-07-01 9:56 ` [PATCH v20210701 14/40] tools: show migration transfer rate in send_dirty_pages Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 15/40] tools: prepare to allocate saverestore arrays once Olaf Hering
2021-07-05 10:44 ` Andrew Cooper
2021-07-05 11:27 ` Olaf Hering
2021-07-05 13:01 ` Andrew Cooper
2021-07-05 14:11 ` Olaf Hering
2021-07-13 17:50 ` Olaf Hering [this message]
2021-07-01 9:56 ` [PATCH v20210701 16/40] tools: save: move mfns array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 17/40] tools: save: move types array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 18/40] tools: save: move errors array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 19/40] tools: save: move iov array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 20/40] tools: save: move rec_pfns array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 21/40] tools: save: move guest_data array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 22/40] tools: save: move local_pages array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 23/40] tools: restore: move types array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 24/40] tools: restore: move mfns array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 25/40] tools: restore: move map_errs array Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 26/40] tools: restore: move mfns array in populate_pfns Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 27/40] tools: restore: move pfns " Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 28/40] tools: restore: split record processing Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 29/40] tools: restore: split handle_page_data Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 30/40] tools: restore: write data directly into guest Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 31/40] tools: recognize LIBXL_API_VERSION for 4.16 Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 32/40] tools: adjust libxl_domain_suspend to receive a struct props Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 33/40] tools: change struct precopy_stats to precopy_stats_t Olaf Hering
2021-07-01 16:45 ` Anthony PERARD
2021-07-01 17:08 ` Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 34/40] tools: add callback to libxl for precopy_policy and precopy_stats_t Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 35/40] tools: add --max_iters to libxl_domain_suspend Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 36/40] tools: add --min_remaining " Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 37/40] tools: add --abort_if_busy " Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 38/40] tools: add API for expandable bitmaps Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 39/40] tools: use xg_sr_bitmap for populated_pfns Olaf Hering
2021-07-01 9:56 ` [PATCH v20210701 40/40] tools/libxc: use superpages during restore of HVM guest Olaf Hering
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