Gentoo Archives: gentoo-dev

From: Tom Wijsman <TomWij@g.o>
To: aranea@×××××.de
Cc: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] [OT] pkgcore bikeshed (was Portage team)
Date: Mon, 13 Jan 2014 15:47:09
Message-Id: 20140113164608.6411a4a7@TOMWIJ-GENTOO
In Reply to: Re: [gentoo-dev] [OT] pkgcore bikeshed (was Portage team) by Luis Ressel
1 On Mon, 13 Jan 2014 16:38:59 +0100
2 Luis Ressel <aranea@×××××.de> wrote:
3
4 > On Mon, 13 Jan 2014 15:58:13 +0100
5 > Tom Wijsman <TomWij@g.o> wrote:
6 >
7 > > Half a minute if you disable backtracking which you don't need. :)
8 >
9 > Which sadly also means that some updates get skipped silently. (Those
10 > which would trigger rebuilds of other packages because of sub-slot
11 > deps, had that case yesterday).
12
13 Can you give an example of that?
14
15 Rebuilds don't cause a different solution in the graph afaik; so, I
16 wouldn't see how that would form a big problem. I also think this would
17 still be covered by preserved-rebuild and/or revdep-rebuild afterwards.
18
19 In any case, I've not been experiencing problems with this; but am
20 interesting to know how this could go wrong, as no backtracking works
21 for me and I hope it will continue to do so.
22
23 Btw, this also makes me question how proper pkgcore can do rebuilds.
24
25 > > > Ironically, launching the same emerge command twice, will take
26 > > > more or less the same time.
27 > >
28 > > Determinism results in more or less the same time, that's correct;
29 > > proper benchmarks would show you a similar result.
30 >
31 > I guess he means that the (according to the file sizes) extensive
32 > caching doesn't seem to be of much use.
33
34 For that, _all_ caching would need to be removed before the first run;
35 when there is a mention of "the same", I doubt this was done at all.
36
37 --
38 With kind regards,
39
40 Tom Wijsman (TomWij)
41 Gentoo Developer
42
43 E-mail address : TomWij@g.o
44 GPG Public Key : 6D34E57D
45 GPG Fingerprint : C165 AF18 AB4C 400B C3D2 ABF0 95B2 1FCD 6D34 E57D

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Replies

Subject Author
Re: [gentoo-dev] [OT] pkgcore bikeshed (was Portage team) Luis Ressel <aranea@×××××.de>
Re: [gentoo-dev] [OT] pkgcore bikeshed (was Portage team) Ciaran McCreesh <ciaran.mccreesh@××××××××××.com>