From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 05C3B25776; Thu, 14 Nov 2024 00:17:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731543446; cv=none; b=e1EvZ71/IQJLAERWgsmu2a7GAbj9oVzfJwySMWeNbvx+vXbMTPoS7QQZ6RuBiyMhmEX9s15uHcsS7lYa8ZKcO+XV2e6pOCJZpceyjwQCOXyNYrdrLt9VxDD/KAA+8XLPAfaBX3pTM0JCTHYU84lyvzFqL5pnVCDyMqSKzJlhit4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731543446; c=relaxed/simple; bh=sams9RAjayhA8eov6q7XFBsoSi+1xtqlPnrjKc9CSyg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OFRzhmF7WEWGJgOREdIqoqOXndcPlU5aBfADspUKhi/riKwK1TqzyZCiiGom0CO30Dn8UrXrNjX9n94Ra5KIoubHfVkqaOUTJCptmA+ZRtG5K+XrEqMJa/m6GaFX4KvocoQJOaGzAvZH5vFwIb3iRImu5YTCXIgAVySGoZyF9bc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=duDvIYBR; arc=none smtp.client-ip=192.198.163.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="duDvIYBR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731543445; x=1763079445; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=sams9RAjayhA8eov6q7XFBsoSi+1xtqlPnrjKc9CSyg=; b=duDvIYBRJQ3m0i4yBx7fdTjnccrjG9RZuzTvfI00McAgMot2xwIrRs10 VQrNO/UhKTnggsE8IBSSlfL8RKUTj4l+MfcYszYEbqAQh6HmgxfZ98sxS fLkuvhUQoxK0Y3B2OkgAWgrJyW1ZGSWV5fvdqMMJ0z37ppJgKZL6Mkpf5 Jmv20KBBXTNNRgbQxgW3frvbbmqFy9INd4uao4m0sXXv4FPAsdU3LnY1O HpSZHuAg63k+onTQNMcKAMtOOg3apS+2xXf1hNnsLj6mgsdHoq0qW+QZ9 9DgR729ruu5l27ATLzuvUe0IBDvF/+zrycPtWWVRiUUBwhRVFbdMyD4Tb A==; X-CSE-ConnectionGUID: 1+cg2Tg1S8i4UbF2vBmUbg== X-CSE-MsgGUID: ZPv4uoNMQVinLfenlE2DTA== X-IronPort-AV: E=McAfee;i="6700,10204,11255"; a="30869539" X-IronPort-AV: E=Sophos;i="6.12,152,1728975600"; d="scan'208";a="30869539" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Nov 2024 16:17:19 -0800 X-CSE-ConnectionGUID: TVVv+jAbSdS/vw4vyysAfQ== X-CSE-MsgGUID: Uep8lmumTDqekhDZXaaqYQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,152,1728975600"; d="scan'208";a="92081172" Received: from agluck-desk3.sc.intel.com ([172.25.222.70]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Nov 2024 16:17:19 -0800 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , x86@kernel.org Cc: James Morse , Jamie Iles , Babu Moger , Randy Dunlap , "Shaopeng Tan (Fujitsu)" , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v9 8/9] x86/resctrl: Make mba_sc use total bandwidth if local is not supported Date: Wed, 13 Nov 2024 16:17:10 -0800 Message-ID: <20241114001712.80315-9-tony.luck@intel.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241114001712.80315-1-tony.luck@intel.com> References: <20241114001712.80315-1-tony.luck@intel.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The default input measurement to the mba_sc feedback loop for memory bandwidth control when the user mounts with the "mba_MBps" option has historically been the local bandwidth event. But some systems may not support a local bandwidth event. When local bandwidth event is not supported, check for support of total bandwidth and use that instead. Signed-off-by: Tony Luck --- arch/x86/kernel/cpu/resctrl/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index 94bf559966d6..3d1735ed8d1f 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -965,6 +965,8 @@ static __init bool get_rdt_mon_resources(void) if (is_mbm_local_enabled()) mba_mbps_default_event = QOS_L3_MBM_LOCAL_EVENT_ID; + else if (is_mbm_total_enabled()) + mba_mbps_default_event = QOS_L3_MBM_TOTAL_EVENT_ID; return !rdt_get_mon_l3_config(r); } -- 2.47.0