From: "Anton V. Boyarshinov" <boyarsh@altlinux.org>
To: Alexey Sheplyakov <asheplyakov@basealt.ru>
Cc: ALT Linux Team development discussions <devel@lists.altlinux.org>,
Michael Shigorin <mike@altlinux.org>
Subject: Re: [devel] О пропускной способности устройств хранения (Re: Time limit)
Date: Fri, 19 Feb 2021 16:50:10 +0300
Message-ID: <20210219135010.0dd7f313@tower> (raw)
In-Reply-To: <7e6f7724-005f-3873-1306-fd92325d8d68@basealt.ru>
В Fri, 19 Feb 2021 16:29:15 +0400
Alexey Sheplyakov <asheplyakov@basealt.ru> пишет:
> При скорости записи 250 МБ/sec (ширпотребный SSD) записать такой объем можно за
> 22 секунды. 15% времени, необходимого на системные вызовы.
> А значит, даже бесконечно быстрый (RAM)диск ускорит сборку не более чем на 15%.
>
>
> TL;DR: сборка гораздо раньше упрется в скорость выполнения системных вызовов (fork/read/write/access).
Интересная мысль, но, с другой стороны, у нас много ядер и на всех
выполняются процессы. А читать/писать хотят один и тот же диск, так что
системные вызовы выполняются (во многом) параллельно, а пропускную
способность диска приходится делить на всех...
next prev parent reply other threads:[~2021-02-19 13:50 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-17 22:52 ` [devel] Time limit Dmitry V. Levin
2021-02-17 23:34 ` Andrey Savchenko
2021-02-17 22:55 ` Alexey Gladkov
2021-02-17 23:22 ` Dmitry V. Levin
2021-02-17 23:43 ` Alexey Gladkov
2021-02-18 6:44 ` Anton Farygin
2021-02-18 6:56 ` Alexey V. Vissarionov
2021-02-18 7:02 ` Anton Farygin
2021-02-18 7:18 ` Alexey V. Vissarionov
2021-02-18 7:25 ` Anton Farygin
2021-02-18 7:41 ` Alexey V. Vissarionov
2021-02-18 7:43 ` Anton Farygin
2021-02-18 7:47 ` Alexey V. Vissarionov
2021-02-18 7:53 ` Anton Farygin
2021-02-18 11:41 ` Dmitry V. Levin
2021-02-18 7:11 ` Vitaly Chikunov
2021-02-18 11:37 ` Dmitry V. Levin
2021-02-18 17:50 ` Anton Farygin
2021-02-18 21:52 ` Michael Shigorin
2021-02-18 22:00 ` Alexey V. Vissarionov
2021-02-19 7:11 ` Anton Farygin
2021-02-19 10:50 ` Michael Shigorin
2021-02-19 11:11 ` Anton Farygin
2021-02-19 12:05 ` Michael Shigorin
2021-02-19 12:23 ` Anton Farygin
2021-02-21 18:23 ` [devel] hsh --initroot: nvme vs ssd Anton Farygin
2021-02-21 18:38 ` Vladimir D. Seleznev
2021-02-21 18:41 ` Anton Farygin
2021-02-21 18:47 ` Anton Farygin
2021-02-21 18:51 ` Dmitry V. Levin
2021-02-21 19:41 ` Anton Farygin
2021-02-21 20:27 ` Anton Farygin
2021-02-19 12:29 ` [devel] О пропускной способности устройств хранения (Re: Time limit) Alexey Sheplyakov
2021-02-19 13:50 ` Anton V. Boyarshinov [this message]
2021-02-19 13:56 ` Anton Farygin
2021-02-19 14:03 ` Anton V. Boyarshinov
2021-02-22 8:54 ` Alexey Sheplyakov
2021-02-24 7:51 ` Anton V. Boyarshinov
2021-02-19 8:47 ` [devel] Time limit Anton V. Boyarshinov
2021-02-19 8:48 ` Anton Farygin
2021-02-19 9:39 ` Leonid Krivoshein
2021-02-19 9:57 ` Anton Farygin
2021-02-19 11:12 ` Michael Shigorin
2021-02-19 11:26 ` Anton Farygin
2021-02-19 11:28 ` Anton V. Boyarshinov
2021-02-19 11:36 ` Anton Farygin
2021-02-19 11:43 ` Anton V. Boyarshinov
2021-02-19 11:48 ` Anton Farygin
2021-02-19 11:59 ` Anton V. Boyarshinov
2021-02-19 12:01 ` Anton Farygin
2021-02-19 11:45 ` [devel] ssd for hasher Anton Farygin
2021-02-19 16:11 ` [devel] Time limit Alexey Gladkov
2021-02-19 16:18 ` Dmitry V. Levin
2021-02-17 23:21 ` Alexey Gladkov
2021-02-18 5:52 ` Sergey Afonin
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