From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932308AbcHISPZ (ORCPT ); Tue, 9 Aug 2016 14:15:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36726 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751774AbcHISPX (ORCPT ); Tue, 9 Aug 2016 14:15:23 -0400 Date: Tue, 9 Aug 2016 13:15:16 -0500 From: Clark Williams To: Steven Rostedt , Carsten Emde Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, Ingo Molnar , Andrew Morton , Thomas Gleixner , Jon Masters , Daniel Wagner , Sebastian Andrzej Siewior Subject: Re: [RFC][PATCH 0/3] tracing: Add Hardware Latency detector tracer Message-ID: <20160809131516.6a83e93e@sluggy.hsv.redhat.com> In-Reply-To: <20160804113033.78132a93@gandalf.local.home> References: <20160804145708.158968389@goodmis.org> <20160804113033.78132a93@gandalf.local.home> Organization: Red Hat, Inc MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; boundary="Sig_/g=e.BAs97YUI.wtvYg9a/sO"; protocol="application/pgp-signature" X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 09 Aug 2016 18:15:23 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/g=e.BAs97YUI.wtvYg9a/sO Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Thu, 4 Aug 2016 11:30:33 -0400 Steven Rostedt wrote: > Note, I'm currently working on adding code to detect NMIs to this as > well. And perhaps even tracing SMI counters. Just to show what caused > the latency, as latency isn't measured by the counters (that I know of). >=20 I like the trace report, but for one small thing; I think it's worth either= adding units to the reported latency values (us suffix) or putting in a he= ader line that hwlatdetect values are reported in microseconds. > <...>-2644 [001] d... 202.735708: [99] inner:13 outer:16 ts:1470352= 534.886878855 > <...>-2644 [001] d... 206.767274: [100] inner:14 outer:18747 ts:147= 0352538.917966818 smi-total:2 > <...>-2644 [002] d... 207.775164: [101] inner:0 outer:19162 ts:1470= 352539.920988709 smi-total:6 > <...>-2644 [003] d... 208.783067: [102] inner:19376 outer:19276 ts:= 1470352540.923010578 smi-total:6 > <...>-2644 [000] d... 209.827416: [103] inner:19650 outer:20665 ts:= 1470352541.926032469 smi-total:6 > <...>-2644 [001] d... 210.831062: [104] inner:20526 outer:20680 ts:= 1470352542.973055312 smi-total:6 Clark --=20 The United States Coast Guard: Ruining natural selection since 1790 --Sig_/g=e.BAs97YUI.wtvYg9a/sO Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQIcBAEBCgAGBQJXqh20AAoJEOI5asVwYXLrEWAP/0f2aQf9Fta6uazE7759ijuq b0dB+JwrJEi2+15pXZhk5JmF7vq3Bt3YgDk4hkLzMNyqiI/FLN/U3lL/LWhgDaY3 a2PUe9H++W6PfGh8ITqEUzKGp7bfw1W8YS1hc/7De2M5Zmr6sbDWDFuBBRSynsak 7ZzYnmuefDbYCvSV6CQWZ+ib/faUhvj7C58zYaBxP1fsWxiVykjXr6R1CGOPBUTt 06Dl5FOrlJCZxfkvRuk+oi57am107xhET+0Dd34Sl/L7wUPBqnRGM6WPlP7uJ6KD Jsei0ESsZRMWVwg7wCORgsUWYpti/ZVfbJJxViHnPbdzVmSCEY/YfmTla0CibY8r 5n681c9YT8PoW7I62QSJftv+L4tnzmDQ0KM4volP51LRQQPsmgGzxhGdfD66sQrY da/acJc/f0atHOCojZDvnUItILQgFocuh+iAjKjzwz5EQWjMxpKAEHyD5giIxV5O dzByRj+16Yxc08H0ypwTUVvbt0epIr9I+4rtBYp9xMzJpdHyUoseF4k3SI/0PUrC QRpBfwfuYYhruGT7m/6Rhuvgsbp5DyKSJ86mErIAhB1z48Ec8+IaFjVTXg6xmnU/ A/2caIdo5oOtnePQj4XEVhacal3IUSq9SA+jRfqX0eF+fsePcF2/kPzByj3B0DiZ DHkMXVC+RbShcc37/Vx5 =1eqv -----END PGP SIGNATURE----- --Sig_/g=e.BAs97YUI.wtvYg9a/sO--