From: Tony Lindgren <tony@atomide.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: kernel list <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-omap@vger.kernel.org, sre@kernel.org, nekit1000@gmail.com,
mpartap@gmx.net, merlijn@wizzup.org
Subject: Re: v4.18-rc1 on droid 4: very bad CPU performance
Date: Fri, 22 Jun 2018 00:20:05 -0700 [thread overview]
Message-ID: <20180622072005.GF112168@atomide.com> (raw)
In-Reply-To: <20180621121542.GA4836@amd>
* Pavel Machek <pavel@ucw.cz> [180621 12:18]:
> 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?
I've noticed firefox is super slow.. Git bisect time?
Regards,
Tony
WARNING: multiple messages have this Message-ID (diff)
From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: v4.18-rc1 on droid 4: very bad CPU performance
Date: Fri, 22 Jun 2018 00:20:05 -0700 [thread overview]
Message-ID: <20180622072005.GF112168@atomide.com> (raw)
In-Reply-To: <20180621121542.GA4836@amd>
* Pavel Machek <pavel@ucw.cz> [180621 12:18]:
> Hi!
>
> V4.18 is slower than it should be.
>
> user at 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 at 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?
I've noticed firefox is super slow.. Git bisect time?
Regards,
Tony
next prev parent reply other threads:[~2018-06-22 7:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-21 12:15 v4.18-rc1 on droid 4: very bad CPU performance Pavel Machek
2018-06-21 12:15 ` Pavel Machek
2018-06-22 7:20 ` Tony Lindgren [this message]
2018-06-22 7:20 ` Tony Lindgren
2018-06-22 7:49 ` Tony Lindgren
2018-06-22 7:49 ` Tony Lindgren
2018-06-25 9:49 ` Pavel Machek
2018-06-25 9:49 ` Pavel Machek
2018-06-26 6:16 ` Tony Lindgren
2018-06-26 6:16 ` Tony Lindgren
2018-06-27 13:26 ` Pavel Machek
2018-06-27 13:26 ` Pavel Machek
2018-06-27 19:48 ` Pavel Machek
2018-06-27 19:48 ` Pavel Machek
2018-06-27 20:58 ` Pavel Machek
2018-06-27 20:58 ` Pavel Machek
2018-06-28 9:06 ` Tony Lindgren
2018-06-28 9:06 ` Tony Lindgren
2018-07-04 20:12 ` Pavel Machek
2018-07-04 20:12 ` Pavel Machek
2018-07-04 20:12 ` Pavel Machek
2018-07-04 20:22 ` Pavel Machek
2018-07-04 20:22 ` Pavel Machek
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