From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 711B3C43441 for ; Mon, 19 Nov 2018 04:56:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3027E2086A for ; Mon, 19 Nov 2018 04:56:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3027E2086A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=davemloft.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725954AbeKSPPM (ORCPT ); Mon, 19 Nov 2018 10:15:12 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:33416 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725823AbeKSPPL (ORCPT ); Mon, 19 Nov 2018 10:15:11 -0500 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::bf5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 3EEC8148C8AAC; Sun, 18 Nov 2018 20:52:46 -0800 (PST) Date: Sun, 18 Nov 2018 20:52:43 -0800 (PST) Message-Id: <20181118.205243.227550158553460819.davem@davemloft.net> To: jolsa@redhat.com Cc: acme@kernel.org, linux-kernel@vger.kernel.org, namhyung@kernel.org, jolsa@kernel.org Subject: Re: [PATCH RFC] hist lookups From: David Miller In-Reply-To: <20181113104054.GJ30042@krava> References: <20181111232627.GC30042@krava> <20181111.153259.2003083478035551655.davem@davemloft.net> <20181113104054.GJ30042@krava> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Sun, 18 Nov 2018 20:52:46 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jiri Olsa Date: Tue, 13 Nov 2018 11:40:54 +0100 > I pushed/rebased what I have to perf/fixes branch again > > please note I had to change our compile changes, because > they wouldn't compile on x86, but I can't verify on sparc, > so you might see some compile fails again I just checked your current perf/fixes branch. It builds on Sparc ;-) And it behaves better too. I do get tons of drops and lost events, but it seems to keep going even during the hardest load. Eventually I end up with a lot of unresolvable histogram entries, so that is something to look into. I looked at your drop logic and it seems perfect, we avoid dropping all non-SAMPLE events which is what we want. So that can't be the cause of the issues I am seeing.