From: Gordon Pettey <petteyg359@gmail.com>
To: gentoo-dev@lists.gentoo.org
Subject: Re: [gentoo-dev] Manifest2 hashes, take n+1-th: 3 hashes for the tie-breaker case
Date: Sun, 12 Nov 2017 21:48:09 -0600 [thread overview]
Message-ID: <CAHY5Mee6NdpE_acTee80C0M_9ycDjpmnysd5zQVxWW-x12GJ9A@mail.gmail.com> (raw)
In-Reply-To: <88fa2503-11de-2f34-b4a9-58159f14a1ac@gentoo.org>
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On Sun, Nov 12, 2017 at 8:22 PM, Joshua Kinard <kumba@gentoo.org> wrote:
> Minor clarification, old single core //and// uni-processor. Some older
> machines have multiple physical CPUs that are single-core. Threading
> should be
> okay on these, as long as the thread count stays under NR_CPUS.
>
> I also have a really old single-CPU system, MIPS (obviously). Not the
> fastest
> on the block compared to the other equipment I've got, but does anyone
> know of
> any simple timing scripts/programs available that can benchmark some of
> these
> proposed digest hashes? If they turn out to be reasonably quick on my old
> machine, I doubt then that speed will be too much of an issue.
>
Even on your "old single-CPU MIPS" system, what percentage of time is
spent verifying manifest hashes compared to actually building/installing?
The whole "slow and/or multiple hashes will cause problems" argument
seems specious.
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next prev parent reply other threads:[~2017-11-13 3:48 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-19 19:08 [gentoo-dev] Manifest2 hashes, take n+1-th Michał Górny
2017-10-19 21:00 ` Michał Górny
2017-10-19 22:20 ` Francesco Riosa
2017-10-20 23:38 ` Michał Górny
2017-10-21 1:21 ` R0b0t1
2017-10-19 22:32 ` Hanno Böck
2017-10-19 22:49 ` Gordon Pettey
2017-10-20 9:10 ` Dirkjan Ochtman
2017-10-20 9:23 ` Ulrich Mueller
2017-10-20 9:31 ` Dirkjan Ochtman
2017-10-20 12:55 ` Hanno Böck
2017-10-20 13:04 ` Kristian Fiskerstrand
2017-10-20 13:32 ` Rich Freeman
2017-10-21 1:23 ` R0b0t1
2017-10-20 22:42 ` Anton Molyboha
2017-10-20 23:03 ` Gordon Pettey
2017-10-20 23:39 ` Michał Górny
2017-10-21 2:56 ` [gentoo-dev] " Duncan
2017-10-20 13:05 ` [gentoo-dev] " Michael Orlitzky
2017-10-20 13:26 ` Kristian Fiskerstrand
2017-10-20 15:42 ` Paweł Hajdan, Jr.
2017-10-20 16:15 ` Michał Górny
2017-10-21 8:01 ` Paweł Hajdan, Jr.
2017-10-21 8:20 ` Michał Górny
2017-10-20 22:21 ` R0b0t1
2017-10-21 16:26 ` Robin H. Johnson
2017-10-21 17:12 ` R0b0t1
2017-10-21 17:37 ` R0b0t1
2017-10-21 17:50 ` Hanno Böck
2017-10-21 20:11 ` [gentoo-dev] " Duncan
2017-11-08 18:57 ` R0b0t1
2017-11-08 20:01 ` Jonas Stein
2017-11-08 23:45 ` [gentoo-dev] " R0b0t1
2017-11-15 21:02 ` [gentoo-dev] Manifest2 hashes: validation of single hash per MANIFESTx_REQUIRED_HASH Robin H. Johnson
2017-11-21 3:00 ` R0b0t1
2017-11-21 3:15 ` R0b0t1
2017-11-21 4:19 ` Matt Turner
2017-11-21 4:28 ` R0b0t1
2017-11-08 19:01 ` [gentoo-dev] Manifest2 hashes, take n+1-th R0b0t1
2017-10-23 8:16 ` [gentoo-dev] Manifest2 hashes, take n+1-th: 3 hashes for the tie-breaker case Robin H. Johnson
2017-10-23 11:33 ` Michał Górny
2017-10-23 21:00 ` Robin H. Johnson
2017-10-24 4:04 ` Michał Górny
2017-10-24 4:11 ` Michał Górny
2017-10-24 8:21 ` Paweł Hajdan, Jr.
2017-10-24 12:01 ` Rich Freeman
2017-10-24 11:56 ` Chí-Thanh Christopher Nguyễn
2017-10-24 13:25 ` Michał Górny
2017-10-24 21:33 ` Allan Wegan
2017-10-25 2:40 ` [gentoo-dev] Manifest2 hashes, take n+1-th: one hash to decide them all Robin H. Johnson
2017-10-25 12:32 ` Hanno Böck
2017-10-25 17:43 ` Paweł Hajdan, Jr.
2017-10-28 4:54 ` R0b0t1
2017-11-13 2:22 ` [gentoo-dev] Manifest2 hashes, take n+1-th: 3 hashes for the tie-breaker case Joshua Kinard
2017-11-13 3:48 ` Gordon Pettey [this message]
2017-11-13 4:28 ` Joshua Kinard
2017-11-13 7:37 ` Michał Górny
2017-10-21 2:01 ` [gentoo-dev] Manifest2 hashes, take n+1-th Jason A. Donenfeld
2017-10-21 7:09 ` Michał Górny
2017-10-21 2:08 ` Chí-Thanh Christopher Nguyễn
2017-10-21 7:09 ` Michał Górny
2017-11-06 16:58 ` Michał Górny
2017-11-06 19:13 ` Robin H. Johnson
2017-11-06 19:25 ` Mike Gilbert
2017-11-06 19:36 ` Michał Górny
-- strict thread matches above, loose matches on Subject: below --
2017-11-15 16:28 [gentoo-dev] manifest-hashes changing to 'BLAKE2B SHA512' on 2017-11-21 Michał Górny
2017-11-15 17:47 ` R0b0t1
2017-11-15 19:21 ` NP-Hardass
2017-11-15 20:21 ` William L. Thomson Jr.
2017-11-15 21:15 ` Rich Freeman
2017-11-15 22:10 ` William L. Thomson Jr.
[not found] ` <20171115171011.07ffd30a@wlt.obsidian-studios.com>
2017-11-15 22:19 ` William L. Thomson Jr.
2017-11-15 20:14 ` William L. Thomson Jr.
2017-11-15 19:25 ` Nils Freydank
2017-11-15 22:56 ` Michał Górny
2017-11-21 18:21 ` Michał Górny
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