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 09BA6F3D334 for ; Thu, 5 Mar 2026 17:03:30 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AEEF010E2C7; Thu, 5 Mar 2026 17:03:29 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="PMcs2IFw"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) by gabe.freedesktop.org (Postfix) with ESMTPS id 96A1A10E2C7 for ; Thu, 5 Mar 2026 17:03:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1772730208; x=1804266208; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=63ScMKrv0jiIhmsZwwSwGOCC1Z3HKPCdWEb/2SMfFzk=; b=PMcs2IFwryITCwEOMerqzIs/2PiZKrX1rhtO+dpqzwOSpadZtSbordvv 3znS7Y1aEW6hylGn3Cx5g2zHytIGcGT9vAYaoT9cJ/zFjUHHbKpUqNuOX DZpd5aMQwK7QRzI04VzGe02rOZwN8QAhMB1QNYfj5qyvMljPbihJdt47w UY8AsV9rY6jo6Y/AFyROiR+0OkwlehZ1zI4KmBfGooidmukOMtZDENEi+ yal5fGveDzFgzbLRTlbPUqY20fwUtx3JJXcTIwB95xXzKaRmdzQjFw60d ekjPEY3Xn8LK/0h8btwmY9lQmEci6THiUQ98XE1vsFUQUrSQX9HpXimNt Q==; X-CSE-ConnectionGUID: CUXcTCGiTte8ggMIEERf8A== X-CSE-MsgGUID: +RoA2GhGQKGScywAu7+lmg== X-IronPort-AV: E=McAfee;i="6800,10657,11720"; a="77697134" X-IronPort-AV: E=Sophos;i="6.23,103,1770624000"; d="scan'208";a="77697134" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2026 09:03:04 -0800 X-CSE-ConnectionGUID: zrJyLQJOQAm2FDhUsKrOVQ== X-CSE-MsgGUID: RluS8FlXSCau4MqkPeSHmQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,103,1770624000"; d="scan'208";a="218871197" Received: from nkumarg-desk.iind.intel.com ([10.190.216.171]) by orviesa007.jf.intel.com with ESMTP; 05 Mar 2026 09:03:02 -0800 From: Nareshkumar Gollakoti To: intel-xe@lists.freedesktop.org Cc: thomas.hellstrom@linux.intel.com, stuart.summers@intel.com, Nareshkumar Gollakoti Subject: [PATCH v2 0/1] drm/xe: Set GT rp min frequency as 1.2GHz default for BMG/CRI Date: Thu, 5 Mar 2026 22:25:20 +0530 Message-ID: <20260305165519.4170892-3-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. v2: - Fix Indentation(Thomas) - Add comment about power impact(Stuart) 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 | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) -- 2.43.0