From: "Michael Grønager" <gronager@ceptacle•com>
To: Gregory Maxwell <gmaxwell@gmail•com>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Announcement: libcoin
Date: Wed, 1 Feb 2012 16:50:46 +0100 [thread overview]
Message-ID: <A9838AA4-C010-470C-9F91-9C1DC43F6BEA@ceptacle.com> (raw)
In-Reply-To: <CAAS2fgQ+zc_ji+8hzA8kvfBPTSpYVEsDSB6=6k8cC6R9vdfcdg@mail.gmail.com>
Hi Gregory,
I played with the database sync as well to get further speedups, but in the latest version I could only get about 1% extra from this.
In the Satoshi client there is a bunch of sleeps and mutexes (put in there with great generosity) for making threads run smoother and to avoid deadlock I guess.
The big change in speed came from moving from the threading based setup to the async based setup, so I think these are the culprit. Further, as I also write somewhere in the wiki. I can measure that 50% of the time is consumed in verify, so there is not much left to optimize now. Actually, Berkeley DB does a quite decent job in caching reads so not even a cache should help.
Cheers,
M
On 01/02/2012, at 15:59, Gregory Maxwell wrote:
> On Wed, Feb 1, 2012 at 9:18 AM, Michael Grønager <gronager@ceptacle•com> wrote:
>> The libcoin/bitcoind client downloads the entire block chain 3.5 times faster than the bitcoin/bitcoind client. This is less than 90 minutes on a modern laptop!
>
> Very interesting. Do you know where this speedup came from? It's not
> typical for straight refactors that don't change datastructures and
> the like to see such big speedups.
>
> I see you have commented out code that disables fsync, which was my
> first guess since I get big speedups from doing similar things.
Michael Gronager, PhD
Director, Ceptacle
Jens Juels Gade 33
2100 Copenhagen E
Mobile: +45 31 45 14 01
E-mail: gronager@ceptacle•com
Web: http://www.ceptacle.com/
next prev parent reply other threads:[~2012-02-01 15:50 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-01 14:18 Michael Grønager
2012-02-01 14:59 ` Gregory Maxwell
2012-02-01 15:50 ` Michael Grønager [this message]
2012-02-01 16:06 ` Jorge Timón
2012-02-01 15:02 ` Wladimir
2012-02-01 15:52 ` Michael Grønager
2012-02-01 15:09 ` slush
2012-02-01 15:57 ` Michael Grønager
2012-02-01 23:50 ` grarpamp
2012-02-02 8:32 ` Michael Grønager
2012-02-02 11:34 ` Craig B Agricola
2012-02-03 0:19 ` Pieter Wuille
2012-02-03 9:52 ` Michael Grønager
2012-02-01 15:26 ` Luke-Jr
2012-02-01 15:58 ` Michael Grønager
2012-02-01 16:15 ` Luke-Jr
2012-02-01 16:21 ` Michael Grønager
2012-02-01 16:23 ` Aidan Thornton
2012-02-01 16:20 ` Michael Grønager
2012-02-01 16:23 ` Luke-Jr
2012-02-01 17:37 ` Luke-Jr
2012-02-01 17:51 ` Michael Grønager
[not found] ` <CAAS2fgSQZ1wv=OXnBnGbKnLTZXbn909umpPBaZDF2g6vy8katA@mail.gmail.com>
2012-02-02 17:12 ` Gregory Maxwell
2012-02-02 17:36 ` Gregory Maxwell
2012-02-02 17:46 ` Gregory Maxwell
2012-02-23 17:31 ` Martinx - ジェームズ
2012-02-23 19:48 ` Michael Grønager
2012-02-23 20:01 ` Michael Grønager
2012-02-23 20:35 ` Michael Grønager
2012-02-23 23:29 ` Martinx - ジェームズ
2012-02-24 2:17 ` Martinx - ジェームズ
2012-02-24 7:44 ` Michael Grønager
2012-02-24 16:17 ` Michael Grønager
2012-02-24 18:49 ` Martinx - ジェームズ
2012-02-24 19:40 ` Michael Grønager
2012-02-24 19:57 ` Michael Grønager
2012-02-25 2:11 ` Martinx - ジェームズ
2012-02-26 17:57 ` Michael Grønager
2012-02-27 19:03 ` Martinx - ジェームズ
2012-02-27 21:03 ` Michael Grønager
2012-02-28 9:03 ` Michael Grønager
[not found] ` <CAJSM8J15LBiT9ojrPDE1-TXqmBLXcVvAmWw0e=5nQfLtMQ42Zg@mail.gmail.com>
[not found] ` <8CEEE576-37DF-4101-9593-73D5FB66D52F@ceptacle.com>
2012-03-22 10:48 ` Martinx - ジェームズ
2012-03-22 11:34 ` Michael Grønager
2012-03-28 7:59 ` Martinx - ジェームズ
2012-03-22 10:50 ` Martinx - ジェームズ
2012-03-22 11:35 ` Michael Grønager
2012-03-22 16:34 ` Peter Vessenes
2012-03-27 9:58 ` Martinx - ジェームズ
[not found] ` <B4616B21-7C05-4793-8452-376EE4122BEC@ceptacle.com>
2012-04-15 4:32 ` Martinx - ジェームズ
2012-07-16 20:14 ` Martinx - ジェームズ
2012-09-12 23:27 ` Martinx - ジェームズ
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