From: Derrick Stolee <stolee@gmail.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>, git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>, "Jeff King" <peff@peff.net>,
"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>,
"SZEDER Gábor" <szeder.dev@gmail.com>,
"Eric Sunshine" <sunshine@sunshineco.com>
Subject: Re: [PATCH] commit-graph write: use pack order when finding commits
Date: Thu, 17 Jan 2019 10:09:18 -0500 [thread overview]
Message-ID: <5b1146a1-9ec6-f30e-80e9-cb7cd4dc1a58@gmail.com> (raw)
In-Reply-To: <20190117132345.29791-1-avarab@gmail.com>
On 1/17/2019 8:23 AM, Ævar Arnfjörð Bjarmason wrote:
> Slightly optimize the "commit-graph write" step by using
> FOR_EACH_OBJECT_PACK_ORDER with for_each_object_in_pack(). See commit
> [1] and [2] for the facility and a similar optimization for "cat-file".
>
> On Linux it is around 5% slower to run:
>
> echo 1 >/proc/sys/vm/drop_caches &&
> cat .git/objects/pack/* >/dev/null &&
> git cat-file --batch-all-objects --batch-check --unordered
>
> Than the same thing with the "cat" omitted. This is as expected, since
> we're iterating in pack order and the "cat" is extra work.
>
> Before this change the opposite was true of "commit-graph write". We
> were 6% faster if we first ran "cat" to efficiently populate the FS
> cache for our sole big pack on linux.git than if we had it populated
> via for_each_object_in_pack(). Now we're 3% faster without the "cat"
> instead.
>
> The tests were done on an unloaded Linux 3.10 system with 10 runs for
> each.
>
> 1. 736eb88fdc ("for_each_packed_object: support iterating in
> pack-order", 2018-08-10)
>
> 2. 0750bb5b51 ("cat-file: support "unordered" output for
> --batch-all-objects", 2018-08-10)
Thanks, Aevar! I plan to give this a test on the Windows repository, as
this is the way we generate the commit-graph in VFS for Git.
I created a PR on microsoft/git [1] and am generating the installers now [2]
[1] https://github.com/Microsoft/git/pull/110
[2] https://dev.azure.com/gvfs/ci/_build/results?buildId=6114
The code itself looks good, I just need to double-check the performance
numbers.
Thanks,
-Stolee
next prev parent reply other threads:[~2019-01-17 15:09 UTC|newest]
Thread overview: 133+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-04 20:27 [PATCH 0/2] commit-graph: add progress output Ævar Arnfjörð Bjarmason
2018-09-04 20:27 ` [PATCH 1/2] commit-graph write: " Ævar Arnfjörð Bjarmason
2018-09-04 21:16 ` Eric Sunshine
2018-09-04 22:07 ` Junio C Hamano
2018-09-05 11:58 ` Derrick Stolee
2018-09-05 12:07 ` Ævar Arnfjörð Bjarmason
2018-09-05 21:46 ` Junio C Hamano
2018-09-05 22:12 ` Derrick Stolee
2018-09-07 15:11 ` Ævar Arnfjörð Bjarmason
2018-09-07 15:23 ` Ævar Arnfjörð Bjarmason
2018-09-07 17:15 ` Jeff King
2018-09-07 17:25 ` Derrick Stolee
2018-09-05 12:06 ` Derrick Stolee
2018-09-07 12:40 ` Ævar Arnfjörð Bjarmason
2018-09-07 13:12 ` Derrick Stolee
2018-09-04 20:27 ` [PATCH 2/2] commit-graph verify: " Ævar Arnfjörð Bjarmason
2018-09-04 22:10 ` Junio C Hamano
2018-09-05 12:07 ` [PATCH 0/2] commit-graph: " Derrick Stolee
2018-09-07 18:29 ` [PATCH v2 " Ævar Arnfjörð Bjarmason
2018-09-11 20:26 ` Junio C Hamano
2018-09-07 18:29 ` [PATCH v2 1/2] commit-graph write: " Ævar Arnfjörð Bjarmason
2018-09-21 20:01 ` Derrick Stolee
2018-09-21 21:43 ` Junio C Hamano
2018-09-21 21:57 ` Junio C Hamano
2018-09-07 18:29 ` [PATCH v2 2/2] commit-graph verify: " Ævar Arnfjörð Bjarmason
2018-09-16 6:55 ` Duy Nguyen
2018-09-17 15:33 ` [PATCH v3 0/2] commit-graph: " Ævar Arnfjörð Bjarmason
2018-09-17 15:33 ` [PATCH v3 1/2] commit-graph write: " Ævar Arnfjörð Bjarmason
2018-10-10 20:37 ` SZEDER Gábor
2018-10-10 21:56 ` Ævar Arnfjörð Bjarmason
2018-10-10 22:19 ` SZEDER Gábor
2018-10-10 22:37 ` Ævar Arnfjörð Bjarmason
2018-10-11 17:52 ` Ævar Arnfjörð Bjarmason
2018-10-15 16:05 ` SZEDER Gábor
2018-10-12 6:09 ` Junio C Hamano
2018-10-12 15:07 ` Ævar Arnfjörð Bjarmason
2018-10-12 15:12 ` Derrick Stolee
2018-10-15 16:54 ` SZEDER Gábor
2018-11-19 16:02 ` SZEDER Gábor
2018-11-19 20:23 ` [PATCH] commit-graph: split up close_reachable() " Ævar Arnfjörð Bjarmason
2018-11-19 20:38 ` Derrick Stolee
2018-11-19 22:57 ` SZEDER Gábor
2018-11-20 15:04 ` [PATCH 0/6] commit-graph write: progress output improvements Ævar Arnfjörð Bjarmason
2018-11-20 15:04 ` [PATCH 1/6] commit-graph write: rephrase confusing progress output Ævar Arnfjörð Bjarmason
2018-11-20 15:04 ` [PATCH 2/6] commit-graph write: add more " Ævar Arnfjörð Bjarmason
2018-11-20 16:58 ` SZEDER Gábor
2018-11-20 19:50 ` [PATCH v2 0/6] commit-graph write: progress output improvements Ævar Arnfjörð Bjarmason
2018-11-20 19:50 ` [PATCH v2 1/6] commit-graph write: rephrase confusing progress output Ævar Arnfjörð Bjarmason
2018-11-20 19:50 ` [PATCH v2 2/6] commit-graph write: add more " Ævar Arnfjörð Bjarmason
2018-11-20 23:38 ` SZEDER Gábor
2018-11-20 19:50 ` [PATCH v2 3/6] commit-graph write: show progress for object search Ævar Arnfjörð Bjarmason
2018-11-20 19:50 ` [PATCH v2 4/6] commit-graph write: add more describing progress output Ævar Arnfjörð Bjarmason
2018-11-20 19:50 ` [PATCH v2 5/6] commit-graph write: remove empty line for readability Ævar Arnfjörð Bjarmason
2018-11-20 19:50 ` [PATCH v2 6/6] commit-graph write: add even more progress output Ævar Arnfjörð Bjarmason
2018-11-21 1:23 ` SZEDER Gábor
2018-11-21 1:25 ` [PATCH 1/2] commit-graph: rename 'num_extra_edges' variable to 'num_large_edges' SZEDER Gábor
2018-11-21 3:29 ` Junio C Hamano
2018-11-21 11:32 ` Derrick Stolee
2019-01-18 17:05 ` [PATCH v2 0/2] commit-graph: minor cleanup and optimization SZEDER Gábor
2019-01-18 17:05 ` [PATCH v2 1/2] commit-graph: rename "large edges" to "extra edges" SZEDER Gábor
2019-01-18 17:05 ` [PATCH v2 2/2] commit-graph: don't call write_graph_chunk_large_edges() unnecessarily SZEDER Gábor
2019-01-19 9:32 ` Martin Ågren
2019-01-18 19:41 ` [PATCH v2 0/2] commit-graph: minor cleanup and optimization Junio C Hamano
2018-11-21 1:26 ` [PATCH 2/2] commit-graph: don't call write_graph_chunk_large_edges() unnecessarily SZEDER Gábor
2018-11-21 11:33 ` Derrick Stolee
2018-11-22 13:28 ` [PATCH v3 00/10] commit-graph write: progress output improvements Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` [PATCH v4 01/10] commit-graph: rename 'num_extra_edges' variable to 'num_large_edges' Ævar Arnfjörð Bjarmason
2019-01-16 13:29 ` [PATCH v5 0/9] commit-graph write: progress output improvements Ævar Arnfjörð Bjarmason
2019-01-19 1:26 ` Junio C Hamano
2019-01-19 20:21 ` [PATCH v6 00/10] " Ævar Arnfjörð Bjarmason
2019-01-22 18:30 ` Derrick Stolee
2019-01-23 17:52 ` Junio C Hamano
2019-01-22 19:37 ` Junio C Hamano
2019-01-19 20:21 ` [PATCH v6 01/10] commit-graph write: use pack order when finding commits Ævar Arnfjörð Bjarmason
2019-01-19 20:21 ` [PATCH v6 02/10] commit-graph: rename "large edges" to "extra edges" Ævar Arnfjörð Bjarmason
2019-01-19 20:21 ` [PATCH v6 03/10] commit-graph: don't call write_graph_chunk_large_edges() unnecessarily Ævar Arnfjörð Bjarmason
2019-01-23 17:51 ` [PATCH v6.1 03/10] commit-graph: don't call write_graph_chunk_extra_edges() unnecessarily SZEDER Gábor
2019-01-19 20:21 ` [PATCH v6 04/10] commit-graph write: add "Writing out" progress output Ævar Arnfjörð Bjarmason
2019-01-19 20:21 ` [PATCH v6 05/10] commit-graph write: more descriptive "writing out" output Ævar Arnfjörð Bjarmason
2019-01-19 20:21 ` [PATCH v6 06/10] commit-graph write: show progress for object search Ævar Arnfjörð Bjarmason
2019-01-19 20:21 ` [PATCH v6 07/10] commit-graph write: add more descriptive progress output Ævar Arnfjörð Bjarmason
2019-01-19 20:21 ` [PATCH v6 08/10] commit-graph write: remove empty line for readability Ævar Arnfjörð Bjarmason
2019-01-19 20:21 ` [PATCH v6 09/10] commit-graph write: add itermediate progress Ævar Arnfjörð Bjarmason
2019-01-19 20:21 ` [PATCH v6 10/10] commit-graph write: emit a percentage for all progress Ævar Arnfjörð Bjarmason
2019-03-22 10:28 ` [PATCH] commit-graph: don't show progress percentages while expanding reachable commits SZEDER Gábor
2019-03-22 11:11 ` Ævar Arnfjörð Bjarmason
2019-03-22 11:18 ` SZEDER Gábor
2019-03-22 14:28 ` Ævar Arnfjörð Bjarmason
2019-03-22 14:36 ` Ævar Arnfjörð Bjarmason
2019-03-22 14:55 ` SZEDER Gábor
2019-03-22 15:11 ` Ævar Arnfjörð Bjarmason
2019-03-22 15:49 ` SZEDER Gábor
2019-03-22 16:52 ` SZEDER Gábor
2019-03-22 17:23 ` Ævar Arnfjörð Bjarmason
2019-01-16 13:29 ` [PATCH v5 1/9] commit-graph: rename 'num_extra_edges' variable to 'num_large_edges' Ævar Arnfjörð Bjarmason
2019-01-16 13:29 ` [PATCH v5 2/9] commit-graph: don't call write_graph_chunk_large_edges() unnecessarily Ævar Arnfjörð Bjarmason
2019-01-16 13:29 ` [PATCH v5 3/9] commit-graph write: add "Writing out" progress output Ævar Arnfjörð Bjarmason
2019-01-18 17:16 ` SZEDER Gábor
2019-01-16 13:29 ` [PATCH v5 4/9] commit-graph write: more descriptive "writing out" output Ævar Arnfjörð Bjarmason
2019-01-16 13:29 ` [PATCH v5 5/9] commit-graph write: show progress for object search Ævar Arnfjörð Bjarmason
2019-01-16 13:29 ` [PATCH v5 6/9] commit-graph write: add more descriptive progress output Ævar Arnfjörð Bjarmason
2019-01-16 13:29 ` [PATCH v5 7/9] commit-graph write: remove empty line for readability Ævar Arnfjörð Bjarmason
2019-01-16 13:29 ` [PATCH v5 8/9] commit-graph write: add itermediate progress Ævar Arnfjörð Bjarmason
2019-01-16 13:29 ` [PATCH v5 9/9] commit-graph write: emit a percentage for all progress Ævar Arnfjörð Bjarmason
2019-01-17 13:23 ` [PATCH] commit-graph write: use pack order when finding commits Ævar Arnfjörð Bjarmason
2019-01-17 15:09 ` Derrick Stolee [this message]
2019-01-17 16:35 ` Derrick Stolee
2018-11-22 15:39 ` [PATCH v4 02/10] commit-graph: don't call write_graph_chunk_large_edges() unnecessarily Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` [PATCH v4 03/10] commit-graph write: rephrase confusing progress output Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` [PATCH v4 04/10] commit-graph write: add "Writing out" " Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` [PATCH v4 05/10] commit-graph write: more descriptive "writing out" output Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` [PATCH v4 06/10] commit-graph write: show progress for object search Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` [PATCH v4 07/10] commit-graph write: add more descriptive progress output Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` [PATCH v4 08/10] commit-graph write: remove empty line for readability Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` [PATCH v4 09/10] commit-graph write: add itermediate progress Ævar Arnfjörð Bjarmason
2018-11-22 15:39 ` [PATCH v4 10/10] commit-graph write: emit a percentage for all progress Ævar Arnfjörð Bjarmason
2018-11-22 18:59 ` [PATCH v3 00/10] commit-graph write: progress output improvements Eric Sunshine
2018-11-22 13:28 ` [PATCH v3 01/10] commit-graph: rename 'num_extra_edges' variable to 'num_large_edges' Ævar Arnfjörð Bjarmason
2018-11-22 13:28 ` [PATCH v3 02/10] commit-graph: don't call write_graph_chunk_large_edges() unnecessarily Ævar Arnfjörð Bjarmason
2018-11-22 13:28 ` [PATCH v3 03/10] commit-graph write: rephrase confusing progress output Ævar Arnfjörð Bjarmason
2018-11-22 13:28 ` [PATCH v3 04/10] commit-graph write: add "Writing out" " Ævar Arnfjörð Bjarmason
2018-11-22 13:28 ` [PATCH v3 05/10] commit-graph write: more descriptive "writing out" output Ævar Arnfjörð Bjarmason
2018-11-22 13:28 ` [PATCH v3 06/10] commit-graph write: show progress for object search Ævar Arnfjörð Bjarmason
2018-11-22 13:28 ` [PATCH v3 07/10] commit-graph write: add more descriptive progress output Ævar Arnfjörð Bjarmason
2018-11-22 13:28 ` [PATCH v3 08/10] commit-graph write: remove empty line for readability Ævar Arnfjörð Bjarmason
2018-11-22 13:28 ` [PATCH v3 09/10] commit-graph write: add itermediate progress Ævar Arnfjörð Bjarmason
2018-11-22 13:28 ` [PATCH v3 10/10] commit-graph write: emit a percentage for all progress Ævar Arnfjörð Bjarmason
2018-11-20 15:04 ` [PATCH 3/6] commit-graph write: show progress for object search Ævar Arnfjörð Bjarmason
2018-11-20 15:04 ` [PATCH 4/6] commit-graph write: add more describing progress output Ævar Arnfjörð Bjarmason
2018-11-20 15:04 ` [PATCH 5/6] commit-graph write: remove empty line for readability Ævar Arnfjörð Bjarmason
2018-11-20 15:04 ` [PATCH 6/6] commit-graph write: add even more progress output Ævar Arnfjörð Bjarmason
2018-09-17 15:33 ` [PATCH v3 2/2] commit-graph verify: add " Ævar Arnfjörð Bjarmason
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