From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: v4.18-rc1 on droid 4: very bad CPU performance Date: Thu, 21 Jun 2018 14:15:42 +0200 Message-ID: <20180621121542.GA4836@amd> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="liOOAslEiF7prFVr" Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org To: kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, tony@atomide.com, sre@kernel.org, nekit1000@gmail.com, mpartap@gmx.net, merlijn@wizzup.org List-Id: linux-omap@vger.kernel.org --liOOAslEiF7prFVr Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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 --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --liOOAslEiF7prFVr Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlsrlu4ACgkQMOfwapXb+vI+ZgCgjGoE/b39+ozezf6HIClfCRPR XMEAoIORuNoXvcljvgv1WlK55Qe1+Oz7 =51ml -----END PGP SIGNATURE----- --liOOAslEiF7prFVr--