From: Duy Nguyen <pclouds@gmail.com>
To: Stefan Beller <sbeller@google.com>
Cc: Git Mailing List <git@vger.kernel.org>,
Jameson Miller <jamill@microsoft.com>,
Jonathan Nieder <jrnieder@gmail.com>
Subject: Re: [PATCH 01/13] repository: introduce object parser field
Date: Wed, 2 May 2018 19:58:06 +0200 [thread overview]
Message-ID: <CACsJy8CouvcppoHDEG-PvpuKh9b-r5R1j4Q6HaJ8XPb1G8FSNw@mail.gmail.com> (raw)
In-Reply-To: <CAGZ79ka6p33W8msji9kFMaWGOuDzSyx=y0AFPaQSX_08AZSgag@mail.gmail.com>
On Wed, May 2, 2018 at 7:26 PM, Stefan Beller <sbeller@google.com> wrote:
>> Another suggestion is object_pool, if we keep 'struct object' instead
>> of 'struct parsed_object' and also want to keep current allocation
>> behavior: no individual deallocation. If you free, you free the whole
>> pool (e.g. you could run rev-list --all --objects in a separate pool,
>> once you're done, you delete the whole pool).
>
> That is what the following patches will be about, you can
> only free the whole set of parsed objects.
>
> So if you want to do a separate rev walk, you may need to
> instantiate a new repository for it (ideally you'd only need a
> separate parsed object store).
I'm not sure if it's a good idea to create a separate struct
repository just because you want to free this parsed object store.
What if updates are made in both repositories? All the cache (well,
mostly the delta base cache in sha1_file.c) will double memory usage
as well. Yeah not ideal. But I guess making rev-list related code use
a separate parsed object store is no small task (and kinda risky as
well since we migrate from global lookup_* functions to local ones and
need to choose the correct parsed object store to look up from)
For your information, there is already a good use case for this
wholesale memory free: if we can free the rev-list related memory
early in pack-objects (e.g. part of repack operation) then it could
lower memory pressure significantly when running on large repos. This
has been discussed a bit lately.
--
Duy
next prev parent reply other threads:[~2018-05-02 17:58 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-01 21:33 [PATCH 00/13] object store: alloc Stefan Beller
2018-05-01 21:33 ` [PATCH 01/13] repository: introduce object parser field Stefan Beller
2018-05-02 17:17 ` Duy Nguyen
2018-05-02 17:26 ` Stefan Beller
2018-05-02 17:58 ` Duy Nguyen [this message]
2018-05-02 20:30 ` Jonathan Tan
2018-05-01 21:33 ` [PATCH 02/13] object: add repository argument to create_object Stefan Beller
2018-05-01 21:43 ` Eric Sunshine
2018-05-01 21:33 ` [PATCH 03/13] object: add repository argument to grow_object_hash Stefan Beller
2018-05-01 21:33 ` [PATCH 04/13] alloc: add repository argument to alloc_blob_node Stefan Beller
2018-05-02 20:34 ` Jonathan Tan
2018-05-01 21:33 ` [PATCH 05/13] alloc: add repository argument to alloc_tree_node Stefan Beller
2018-05-01 21:33 ` [PATCH 06/13] alloc: add repository argument to alloc_commit_node Stefan Beller
2018-05-01 21:33 ` [PATCH 07/13] alloc: add repository argument to alloc_tag_node Stefan Beller
2018-05-01 21:33 ` [PATCH 08/13] alloc: add repository argument to alloc_object_node Stefan Beller
2018-05-01 21:33 ` [PATCH 09/13] alloc: add repository argument to alloc_report Stefan Beller
2018-05-01 21:34 ` [PATCH 10/13] alloc: add repository argument to alloc_commit_index Stefan Beller
2018-05-01 21:34 ` [PATCH 11/13] object: allow grow_object_hash to handle arbitrary repositories Stefan Beller
2018-05-01 21:34 ` [PATCH 12/13] object: allow create_object " Stefan Beller
2018-05-02 20:36 ` Jonathan Tan
2018-05-01 21:34 ` [PATCH 13/13] alloc: allow arbitrary repositories for alloc functions Stefan Beller
2018-05-02 17:44 ` Duy Nguyen
2018-05-03 17:24 ` Stefan Beller
2018-05-03 17:35 ` Duy Nguyen
2018-05-02 20:50 ` Jonathan Tan
2018-05-03 17:25 ` Stefan Beller
2018-05-03 14:58 ` Duy Nguyen
2018-05-02 17:01 ` [PATCH 00/13] object store: alloc Duy Nguyen
2018-05-02 18:07 ` Jameson Miller
2018-05-02 18:22 ` Duy Nguyen
2018-05-02 18:44 ` Jameson Miller
2018-05-03 22:45 ` Stefan Beller
2018-05-07 14:05 ` Junio C Hamano
2018-05-07 20:53 ` Stefan Beller
2018-05-07 22:59 ` [PATCH v2 " Stefan Beller
2018-05-07 22:59 ` [PATCH v2 01/13] repository: introduce parsed objects field Stefan Beller
2018-05-08 17:23 ` Jonathan Tan
2018-05-07 22:59 ` [PATCH v2 02/13] object: add repository argument to create_object Stefan Beller
2018-05-07 22:59 ` [PATCH v2 03/13] object: add repository argument to grow_object_hash Stefan Beller
2018-05-07 22:59 ` [PATCH v2 04/13] alloc: add repository argument to alloc_blob_node Stefan Beller
2018-05-07 22:59 ` [PATCH v2 05/13] alloc: add repository argument to alloc_tree_node Stefan Beller
2018-05-07 22:59 ` [PATCH v2 06/13] alloc: add repository argument to alloc_commit_node Stefan Beller
2018-05-07 22:59 ` [PATCH v2 07/13] alloc: add repository argument to alloc_tag_node Stefan Beller
2018-05-07 22:59 ` [PATCH v2 08/13] alloc: add repository argument to alloc_object_node Stefan Beller
2018-05-07 22:59 ` [PATCH v2 09/13] alloc: add repository argument to alloc_report Stefan Beller
2018-05-07 22:59 ` [PATCH v2 10/13] alloc: add repository argument to alloc_commit_index Stefan Beller
2018-05-07 22:59 ` [PATCH v2 11/13] object: allow grow_object_hash to handle arbitrary repositories Stefan Beller
2018-05-07 22:59 ` [PATCH v2 12/13] object: allow create_object " Stefan Beller
2018-05-07 22:59 ` [PATCH v2 13/13] alloc: allow arbitrary repositories for alloc functions Stefan Beller
2018-05-08 10:10 ` Jeff King
2018-05-08 15:00 ` Duy Nguyen
2018-05-08 18:38 ` Stefan Beller
2018-05-08 17:45 ` Jonathan Tan
2018-05-08 19:37 ` [PATCH v3 00/13] object store: alloc Stefan Beller
2018-05-08 19:37 ` [PATCH v3 01/13] repository: introduce parsed objects field Stefan Beller
2018-05-08 19:37 ` [PATCH v3 02/13] object: add repository argument to create_object Stefan Beller
2018-05-08 19:37 ` [PATCH v3 03/13] object: add repository argument to grow_object_hash Stefan Beller
2018-05-08 19:37 ` [PATCH v3 04/13] alloc: add repository argument to alloc_blob_node Stefan Beller
2018-05-08 19:37 ` [PATCH v3 05/13] alloc: add repository argument to alloc_tree_node Stefan Beller
2018-05-08 19:37 ` [PATCH v3 06/13] alloc: add repository argument to alloc_commit_node Stefan Beller
2018-05-08 19:37 ` [PATCH v3 07/13] alloc: add repository argument to alloc_tag_node Stefan Beller
2018-05-08 19:37 ` [PATCH v3 08/13] alloc: add repository argument to alloc_object_node Stefan Beller
2018-05-08 19:37 ` [PATCH v3 09/13] alloc: add repository argument to alloc_report Stefan Beller
2018-05-08 19:37 ` [PATCH v3 10/13] alloc: add repository argument to alloc_commit_index Stefan Beller
2018-05-08 19:37 ` [PATCH v3 11/13] object: allow grow_object_hash to handle arbitrary repositories Stefan Beller
2018-05-08 19:37 ` [PATCH v3 12/13] object: allow create_object " Stefan Beller
2018-05-08 19:37 ` [PATCH v3 13/13] alloc: allow arbitrary repositories for alloc functions Stefan Beller
2018-05-08 20:04 ` Jonathan Tan
2018-05-08 20:37 ` Stefan Beller
2018-05-09 15:54 ` Duy Nguyen
2018-05-09 17:18 ` Duy Nguyen
2018-05-09 19:20 ` Stefan Beller
2018-05-10 15:43 ` Duy Nguyen
2018-05-10 0:40 ` [PATCH v4 00/13] object store: alloc Stefan Beller
2018-05-10 0:40 ` [PATCH v4 01/13] repository: introduce parsed objects field Stefan Beller
2018-05-10 0:40 ` [PATCH v4 02/13] object: add repository argument to create_object Stefan Beller
2018-05-10 0:40 ` [PATCH v4 03/13] object: add repository argument to grow_object_hash Stefan Beller
2018-05-10 0:40 ` [PATCH v4 04/13] alloc: add repository argument to alloc_blob_node Stefan Beller
2018-05-10 0:40 ` [PATCH v4 05/13] alloc: add repository argument to alloc_tree_node Stefan Beller
2018-05-10 0:40 ` [PATCH v4 06/13] alloc: add repository argument to alloc_commit_node Stefan Beller
2018-05-10 0:40 ` [PATCH v4 07/13] alloc: add repository argument to alloc_tag_node Stefan Beller
2018-05-10 0:40 ` [PATCH v4 08/13] alloc: add repository argument to alloc_object_node Stefan Beller
2018-05-10 0:40 ` [PATCH v4 09/13] alloc: add repository argument to alloc_report Stefan Beller
2018-05-10 0:40 ` [PATCH v4 10/13] alloc: add repository argument to alloc_commit_index Stefan Beller
2018-05-10 0:40 ` [PATCH v4 11/13] object: allow grow_object_hash to handle arbitrary repositories Stefan Beller
2018-05-10 0:40 ` [PATCH v4 12/13] object: allow create_object " Stefan Beller
2018-05-10 0:40 ` [PATCH v4 13/13] alloc: allow arbitrary repositories for alloc functions Stefan Beller
2018-05-10 17:16 ` [PATCH v4 00/13] object store: alloc Jonathan Tan
2018-05-10 17:32 ` Stefan Beller
2018-05-10 20:56 ` Jonathan Tan
2018-05-10 22:36 ` Stefan Beller
2018-05-11 19:17 ` [PATCH] alloc: allow arbitrary repositories for alloc functions Stefan Beller
2018-05-11 19:38 ` Eric Sunshine
2018-05-15 21:48 ` Stefan Beller
2018-05-16 2:27 ` Junio C Hamano
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