Thread (11 messages) 11 messages, 2 authors, 2018-07-04

v4.18-rc1 on droid 4: very bad CPU performance

From: tony@atomide.com (Tony Lindgren)
Date: 2018-06-22 07:20:12
Also in: linux-omap, lkml

* Pavel Machek [off-list ref] [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
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