From: Pavel Machek <pavel@ucw.cz>
To: kernel list <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-omap@vger.kernel.org, tony@atomide.com, sre@kernel.org,
nekit1000@gmail.com, mpartap@gmx.net, merlijn@wizzup.org
Subject: v4.18-rc1 on droid 4: very bad CPU performance
Date: Thu, 21 Jun 2018 14:15:42 +0200 [thread overview]
Message-ID: <20180621121542.GA4836@amd> (raw)
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Hi!
V4.18 is slower than it should be.
user@devuan:~$ time cat /dev/urandom | head -c 10000000 | bzip2 -9 -
| wc -c
10044291
52.73user 2.40system 61.53 (1m1.534s) elapsed 89.60%CPU
user@devuan:~$ uname -a
Linux devuan 4.18.0-rc1-87964-gfa19934-dirty #743 SMP Sun Jun 17
19:26:37 CEST 2018 armv7l GNU/Linux
That bzip should take 12 seconds, not minute.
Any ideas? Do you see it, too?
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next reply other threads:[~2018-06-21 12:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-21 12:15 Pavel Machek [this message]
2018-06-22 7:20 ` v4.18-rc1 on droid 4: very bad CPU performance Tony Lindgren
2018-06-22 7:49 ` Tony Lindgren
2018-06-25 9:49 ` Pavel Machek
2018-06-26 6:16 ` Tony Lindgren
2018-06-27 13:26 ` Pavel Machek
2018-06-27 19:48 ` Pavel Machek
2018-06-27 20:58 ` Pavel Machek
2018-06-28 9:06 ` Tony Lindgren
2018-07-04 20:12 ` Pavel Machek
2018-07-04 20:22 ` Pavel Machek
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