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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 78DE2EB64DA for ; Thu, 6 Jul 2023 02:47:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 00B3D10E1CF; Thu, 6 Jul 2023 02:47:46 +0000 (UTC) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0E6C410E1CF for ; Thu, 6 Jul 2023 02:47:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1688611663; x=1720147663; h=date:message-id:from:to:cc:subject:in-reply-to: references:mime-version; bh=6EQBagHlUaDbkoPVwSV0eMJIP1TRvQ21y3KnT6ltqtw=; b=XZ+8VW9P7x7M3OVUx2S0HkBSr8IgznvYcNt9IdeC6gvDDczw2WLdEaPN rnPR0Z1dZB+tNJuyZVWhvlCa/4jEDDdDDmPtHt3/rx84DSbtuovFhES1T pgm9SkiFigIYaAc0pBCNmW1AShngP2S9kKleR+nMaTCG243zUazc8zeL6 CWBzX7vsGnvuyFLQUB26gBRk6TVQGtjOv3ZKk8kcZi1s+I3FnRHW+Tji0 Te1wPZif7lzab4PaDUr1ftsEx9Wp/lYFNW6w9B02FQ6JLQT6JrwY0ywdC ySZxp1UYICGcGURstRWZ0XNM6KYI4wlfzj4mjoVAUlroUuSWOAFrGDbTK Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10762"; a="394244385" X-IronPort-AV: E=Sophos;i="6.01,184,1684825200"; d="scan'208";a="394244385" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jul 2023 19:47:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10762"; a="863928180" X-IronPort-AV: E=Sophos;i="6.01,184,1684825200"; d="scan'208";a="863928180" Received: from adixit-mobl.amr.corp.intel.com (HELO adixit-arch.intel.com) ([10.209.1.248]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jul 2023 19:47:41 -0700 Date: Wed, 05 Jul 2023 19:39:21 -0700 Message-ID: <87mt09daqu.wl-ashutosh.dixit@intel.com> From: "Dixit, Ashutosh" To: Aravind Iddamsetty In-Reply-To: <20230627122113.1472532-3-aravind.iddamsetty@intel.com> References: <20230627122113.1472532-1-aravind.iddamsetty@intel.com> <20230627122113.1472532-3-aravind.iddamsetty@intel.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/28.2 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII Subject: Re: [Intel-xe] [PATCH v2 2/2] drm/xe/pmu: Enable PMU interface X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bommu Krishnaiah , intel-xe@lists.freedesktop.org, Tvrtko Ursulin Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" On Tue, 27 Jun 2023 05:21:13 -0700, Aravind Iddamsetty wrote: > Hi Aravind, > +static u64 __engine_group_busyness_read(struct xe_gt *gt, u64 config) > +{ > + u64 val = 0; > + > + switch (config) { > + case XE_PMU_RENDER_GROUP_BUSY(0): > + val = xe_mmio_read32(gt, XE_OAG_RENDER_BUSY_FREE); > + break; > + case XE_PMU_COPY_GROUP_BUSY(0): > + val = xe_mmio_read32(gt, XE_OAG_BLT_BUSY_FREE); > + break; > + case XE_PMU_MEDIA_GROUP_BUSY(0): > + val = xe_mmio_read32(gt, XE_OAG_ANY_MEDIA_FF_BUSY_FREE); > + break; > + case XE_PMU_ANY_ENGINE_GROUP_BUSY(0): > + val = xe_mmio_read32(gt, XE_OAG_RC0_ANY_ENGINE_BUSY_FREE); > + break; > + default: > + drm_warn(>->tile->xe->drm, "unknown pmu event\n"); > + } > + > + return xe_gt_clock_interval_to_ns(gt, val * 16); > +} A few questions on just the above function first: 1. OK so these registers won't be available to VF's, but any idea what these counts are when VF's are active? 2. When would these 32 bit registers overflow? Let us say a group is continuously busy and we are running at 1 GHz, the registers would overflow in 4 seconds (max value 4G)? 3. What is the multiplication by 16 (not factored above in 2.)? I don't see that in Bspec. Thanks. -- Ashutosh