From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan =?utf-8?Q?Pokorn=C3=BD?= Subject: perf utility question: "Sky high iTLB-load-misses" Date: Wed, 8 Nov 2017 17:34:40 +0100 Message-ID: <20171108163440.GA10004@redhat.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="pf9I7BMVVzbSWLtt" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:46204 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752675AbdKHQeq (ORCPT ); Wed, 8 Nov 2017 11:34:46 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 29A0E25C2B for ; Wed, 8 Nov 2017 16:34:46 +0000 (UTC) Received: from redhat.com (dhcp129-43.brq.redhat.com [10.34.129.43]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 9FC3B5D9C9 for ; Wed, 8 Nov 2017 16:34:45 +0000 (UTC) Content-Disposition: inline Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: linux-perf-users@vger.kernel.org --pf9I7BMVVzbSWLtt Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello, I was recently comparing the effect of using orphan section offloading of some data in the libqb project[*] and basically run into the same rather strange reports by perf as asked on StackOverflow: https://stackoverflow.com/q/47107255 (except that I'm on Skylake processor). Is iTLB-load-misses > 100% reported because of some deficiency of the platform, a bug in perf, or an expected behaviour? Thanks and cheers. Please, keep me in the loop, I am not subscribed to the list. [*] comparing log_callsite_bench_section{full,less} from https://github.com/ClusterLabs/libqb/pull/266/commits/a2b96193ec9a677e18824= 736c363df35ee0c68dd =20 --=20 Jan (Poki) --pf9I7BMVVzbSWLtt Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJaAzIgAAoJEGG7sjqej43iAtsP/3so30FsWOEzjBlqsNR0/dOI 7rWtV4AbF1acPF/2HqUJpM2wURBaL/CYg2hYfSMdaajMupd/4JHbOCJVmYSVD8UK +ZWHTWk83ewRfG2bVYHA4eoQgdR1sbTZla3Jd9kqVM8LvAEU65qJPNSI/iOYLEZL 51C6EI8OQT3tDnQTPySoV8Ap2UzcIRZuN2cEPWOKXAW62vU/Gtn4e2+FHGrfHGkj psAkb/Byz84xNC9jEphxbf0L17PbCbVa0vRq0sQpdMuVa+3DGtp9QM9EXP9WfUa+ W2EX34mxfcQfv+JoWMNAZJgtwpz09BWZxqOuRA8EFF1iedKFgrsb0gjfhaCWD2j2 WAK8lzo19U+GrP/VQrspbnwFXFPTjQbBzqsXPpFsbNVQM0AuiMOom1yjblB+XPLI wv1US5mlvY6OhYNR9aqAgWCxRwu884ut1HvBGsfv7ETmiFX5uIVRrggIdsBH6dg1 4RMfYFXH6ex1qNTUQUdo6nu+pcsMLbalm6QrKCVIGVJHWKqK71Tm1Dlg87l7GyW0 aBWcoM9GJrHAO+MTmJbIJ1k52qkkiVWJIaXQczVVCfole9hpTvEK2zphwOprevFC BY7Bctqmw5qLKlAk9zp4jq55XsCfJ/QXmOMWe3dYYBIb9C+QrK68xfSSSmJlNzN+ TyFvWj33fW1e4HDlfLA2 =7u5M -----END PGP SIGNATURE----- --pf9I7BMVVzbSWLtt--