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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F1A2CDB474 for ; Fri, 20 Oct 2023 17:51:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377926AbjJTRvf (ORCPT ); Fri, 20 Oct 2023 13:51:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46712 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229843AbjJTRve (ORCPT ); Fri, 20 Oct 2023 13:51:34 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id BD741A3 for ; Fri, 20 Oct 2023 10:51:32 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 71747143D; Fri, 20 Oct 2023 10:52:13 -0700 (PDT) Received: from e121345-lin.cambridge.arm.com (e121345-lin.cambridge.arm.com [10.1.196.40]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 8360E3F762; Fri, 20 Oct 2023 10:51:31 -0700 (PDT) From: Robin Murphy To: will@kernel.org Cc: mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, jeremy.linton@arm.com, ilkka@os.amperecomputing.com, renyu.zj@linux.alibaba.com Subject: [PATCH 0/3] perf/arm-cmn: Multi-DTC improvements Date: Fri, 20 Oct 2023 18:51:24 +0100 Message-Id: X-Mailer: git-send-email 2.39.2.101.g768bb238c484.dirty MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On larger CMN configurations with multiple Debug & Trace Controllers, we've so far ignored the notion of DTC domains, mostly since they were not software-discoverable in the original CMN-600 design. However this means that if the user wants to monitor lots of individual nodes across the whole mesh, we end up multiplexing events which could otherwise happily run in parallel if we allocated DTC counters per-domain. This mini-series finally bites the bullet to do that. As usual I've only been able to personally test that it doesn't regress any behaviour on a single-DTC CMN-600, so it would be nice if anyone with a multi-domain CMN-650/CMN-700 setup could confirm that patches 1+2 alone do not visibly change any behaviour, and then patch #3 on top works as expected. Thanks, Robin. Robin Murphy (3): perf/arm-cmn: Fix DTC domain detection perf/arm-cmn: Rework DTC counters (again) perf/arm-cmn: Enable per-DTC counter allocation drivers/perf/arm-cmn.c | 154 +++++++++++++++++++++++------------------ 1 file changed, 85 insertions(+), 69 deletions(-) -- 2.39.2.101.g768bb238c484.dirty