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 E3E51E81A23 for ; Mon, 16 Feb 2026 13:57:26 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A790510E124; Mon, 16 Feb 2026 13:57:26 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="k1lYRxdR"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3E68010E055 for ; Mon, 16 Feb 2026 13:57:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1771250246; x=1802786246; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=zpXpoeli51XHNqmT37CLb9Xubq3aAblCZ+KFFxh+TRQ=; b=k1lYRxdRuYgcdyaO7lJDdAPPdrYYRC6vD/lPqckZkeJSwQLmwvEXBxJS IfZmo62d7D5lwtaBAaiF7qyvwZZIcNYHEmxuX+mg/a+tVc8FDQ1oRAde8 XWnJh2gi+bJIdAeimUDtJlIVzfVmHLjZklIjv9sGp9NLUfQbvWdXuZZjD xMQgf/HRQk7Tx/nWM40C+yngXnZZIP94YIYPiJSSF/oWVkghYli1u6zqb vpjb9MenB8WfH9k0lPHVVvmPX1uzsxo6c7LObC4D+AFjIvArg0nK/xAzc ZYkibuGG2VrmTUCP4/mEr1XKP7VU7x3kToFvnNY6MdlkNiijmMrTGvE00 w==; X-CSE-ConnectionGUID: EO1qwe/pQsWK9i2TXN1BgQ== X-CSE-MsgGUID: uSV52vOHTwKCm+T0tPNjNw== X-IronPort-AV: E=McAfee;i="6800,10657,11702"; a="72238316" X-IronPort-AV: E=Sophos;i="6.21,294,1763452800"; d="scan'208";a="72238316" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2026 05:57:26 -0800 X-CSE-ConnectionGUID: ZXmfVkEZS/ivw3cLBluJKQ== X-CSE-MsgGUID: FmEqKXkwQze8Tdf/s82ggw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,294,1763452800"; d="scan'208";a="212593033" Received: from nkumarg-desk.iind.intel.com ([10.190.216.171]) by fmviesa010.fm.intel.com with ESMTP; 16 Feb 2026 05:57:24 -0800 From: Nareshkumar Gollakoti To: intel-xe@lists.freedesktop.org Cc: thomas.hellstrom@intel.com, tejas.upadhyay@intel.com, himal.prasad.ghimiray@intel.com, Nareshkumar Gollakoti Subject: [PATCH 0/1] drm/xe: Set GT rp min frequency as 1.2GHz default for BMG/CRI Date: Mon, 16 Feb 2026 19:21:08 +0530 Message-ID: <20260216135107.3148167-3-naresh.kumar.g@intel.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Performance degradation occurs in multi-BMG GPU configurations during Peer-to-Peer transactions when one of the two GPUs remains idle with no engine activity. The root cause has been identified as frequency downscaling: the idle remote GPU reduces its operating frequency to the minimum 400MHz, which negatively impacts the bandwidth available for P2P transactions initiated by the active local GPU. To address above problem this patch ensures for the platform BMG/CRI the default GT rp frquency min set as 1.2GHz to ensure effetive P2P transaction bandwidth. Note: While frequency boosting improves performance, it also increases power consumption. In single GPU mode, it causes the GPU to operate at unnecessarily high frequencies by default and as of now we do not have any mechanism to limit this for single GPU. Nareshkumar Gollakoti (1): drm/xe: Set GT rp min frequency as 1.2GHz default for BMG/CRI drivers/gpu/drm/xe/xe_guc_pc.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) -- 2.43.0