From nobody Fri Dec 19 03:04:10 2025 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.16]) (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 C7AA61A2C29 for ; Thu, 27 Jun 2024 20:39:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719520760; cv=none; b=a+4MuIEqnQKaTF6svXfaIPundMYgwJnlCTO7gGeCQPtWD9zx8C4ZdbSJdq4udXlNrE8NirtaoHrJx9VE0X7JCnP2+8JWyjrU8jlcSavYcMTyo2iocMYuilGw82ASdRD2KXbM1N65ixNFYfV18Jag6R3F9b86hQkTIsQlTYd4a2k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719520760; c=relaxed/simple; bh=ZAP1w0D+klf/vYnoc7RYPNBvlo727Y55tNDt7G/JNeg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ixniudm0Et1OTMq7EmH6c947v+YGBa4RojbKU+F064PMPybwpTgSg20+aBk9gzs3DcD5+Ro0FAAG183RsneFOOh3kWLNYKjrYb8MIz1f01VUOVEk5fq0Am1c8E3ey0VMfZe/uFwbTa5kEiKo0SlN3Z0e0knTThAK6R2+9t7Kzcw= 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=IwBWOVWZ; arc=none smtp.client-ip=198.175.65.16 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="IwBWOVWZ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1719520758; x=1751056758; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ZAP1w0D+klf/vYnoc7RYPNBvlo727Y55tNDt7G/JNeg=; b=IwBWOVWZL+7mhnd3jyCqRK27UsUlYyT2wGWa+A1YY0fxckdZk/Rm40Vk QuDVxjrBDcSxdEJIc+iEo2nBscFmmeo/OvF9cs76VY1orI907xL2qRapf XBbXpSFdcCve5t/mfGqNxWYDYs6NFuUMqrJJBStuun1vssNSjq1jvOQHZ G+l6TOWdJpcN4bWPbDrmNQsAAmaLaoWnOUAkU6O6dQezHhlTrkoeFfNNu pWQ2YvyyzEEM+cKhNIbeeJC2V4UHlWe568wk1iKzvW8wBYBoELvGiorhe +PVLtJYjlznQxiV3h+K970OOVvot8Sp66gduil+QvEudob9mRd035eIuq Q==; X-CSE-ConnectionGUID: Ib3dXl36RnmLZdel0978qg== X-CSE-MsgGUID: lG+TORGgQVCNI+MciDMhEA== X-IronPort-AV: E=McAfee;i="6700,10204,11116"; a="16809835" X-IronPort-AV: E=Sophos;i="6.09,167,1716274800"; d="scan'208";a="16809835" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2024 13:39:11 -0700 X-CSE-ConnectionGUID: aWI2Nt6FTo2CgaJuDWV+kw== X-CSE-MsgGUID: 95lagScQQj+ZzPttSy9B/w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,167,1716274800"; d="scan'208";a="82052919" Received: from agluck-desk3.sc.intel.com ([172.25.222.70]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2024 13:39:10 -0700 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Maciej Wieczor-Retman , Peter Newman , James Morse , Babu Moger , Drew Fustini , Dave Martin Cc: x86@kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v22 14/18] x86/resctrl: Fill out rmid_read structure for smp_call*() to read a counter Date: Thu, 27 Jun 2024 13:38:52 -0700 Message-ID: <20240627203856.66628-15-tony.luck@intel.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240627203856.66628-1-tony.luck@intel.com> References: <20240627203856.66628-1-tony.luck@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" mon_event_read() fills out most fields of the struct rmid_read that is passed via an smp_call*() function to a CPU that is part of the correct domain to read the monitor counters. With Sub-NUMA Cluster (SNC) mode there are now two cases to handle: 1) Reading a file that returns a value for a single domain. + Choose the CPU to execute from the domain cpu_mask 2) Reading a file that must sum across domains sharing an L3 cache instance. + Indicate to called code that a sum is needed by passing a NULL rdt_mon_domain pointer. + Choose the CPU from the L3 shared_cpu_map. Signed-off-by: Tony Luck --- arch/x86/kernel/cpu/resctrl/internal.h | 2 +- arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 40 ++++++++++++++++++----- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 2 +- 3 files changed, 34 insertions(+), 10 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/r= esctrl/internal.h index 13d862221f9c..16982d1baf99 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -632,7 +632,7 @@ void mon_event_count(void *info); int rdtgroup_mondata_show(struct seq_file *m, void *arg); void mon_event_read(struct rmid_read *rr, struct rdt_resource *r, struct rdt_mon_domain *d, struct rdtgroup *rdtgrp, - int evtid, int first); + cpumask_t *cpumask, int evtid, int first); void mbm_setup_overflow_handler(struct rdt_mon_domain *dom, unsigned long delay_ms, int exclude_cpu); diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cp= u/resctrl/ctrlmondata.c index 4d76ff31a9e0..50fa1fe9a073 100644 --- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c +++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c @@ -515,7 +515,7 @@ static int smp_mon_event_count(void *arg) =20 void mon_event_read(struct rmid_read *rr, struct rdt_resource *r, struct rdt_mon_domain *d, struct rdtgroup *rdtgrp, - int evtid, int first) + cpumask_t *cpumask, int evtid, int first) { int cpu; =20 @@ -536,7 +536,7 @@ void mon_event_read(struct rmid_read *rr, struct rdt_re= source *r, return; } =20 - cpu =3D cpumask_any_housekeeping(&d->hdr.cpu_mask, RESCTRL_PICK_ANY_CPU); + cpu =3D cpumask_any_housekeeping(cpumask, RESCTRL_PICK_ANY_CPU); =20 /* * cpumask_any_housekeeping() prefers housekeeping CPUs, but @@ -545,7 +545,7 @@ void mon_event_read(struct rmid_read *rr, struct rdt_re= source *r, * counters on some platforms if its called in IRQ context. */ if (tick_nohz_full_cpu(cpu)) - smp_call_function_any(&d->hdr.cpu_mask, mon_event_count, rr, 1); + smp_call_function_any(cpumask, mon_event_count, rr, 1); else smp_call_on_cpu(cpu, smp_mon_event_count, rr, false); =20 @@ -574,16 +574,40 @@ int rdtgroup_mondata_show(struct seq_file *m, void *a= rg) resid =3D md.u.rid; domid =3D md.u.domid; evtid =3D md.u.evtid; - r =3D &rdt_resources_all[resid].r_resctrl; - hdr =3D rdt_find_domain(&r->mon_domains, domid, NULL); - if (!hdr || WARN_ON_ONCE(hdr->type !=3D RESCTRL_MON_DOMAIN)) { + + if (md.u.sum) { + /* + * This file requires summing across all domains that share + * the L3 cache id that was provided in the "domid" field of the + * mon_data_bits union. Search all domains in the resource for + * one that matches this cache id. + */ + list_for_each_entry(d, &r->mon_domains, hdr.list) { + if (d->ci->id =3D=3D domid) { + rr.ci =3D d->ci; + mon_event_read(&rr, r, NULL, rdtgrp, + &d->ci->shared_cpu_map, evtid, false); + goto checkresult; + } + } ret =3D -ENOENT; goto out; + } else { + /* + * This file provides data from a single domain. Search + * the resource to find the domain with "domid". + */ + hdr =3D rdt_find_domain(&r->mon_domains, domid, NULL); + if (!hdr || WARN_ON_ONCE(hdr->type !=3D RESCTRL_MON_DOMAIN)) { + ret =3D -ENOENT; + goto out; + } + d =3D container_of(hdr, struct rdt_mon_domain, hdr); + mon_event_read(&rr, r, d, rdtgrp, &d->hdr.cpu_mask, evtid, false); } - d =3D container_of(hdr, struct rdt_mon_domain, hdr); =20 - mon_event_read(&rr, r, d, rdtgrp, evtid, false); +checkresult: =20 if (rr.err =3D=3D -EIO) seq_puts(m, "Error\n"); diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index 67a8188c6d8f..cd0229f7c30e 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -3073,7 +3073,7 @@ static int mon_add_all_files(struct kernfs_node *kn, = struct rdt_mon_domain *d, return ret; =20 if (!do_sum && is_mbm_event(mevt->evtid)) - mon_event_read(&rr, r, d, prgrp, mevt->evtid, true); + mon_event_read(&rr, r, d, prgrp, &d->hdr.cpu_mask, mevt->evtid, true); } =20 return 0; --=20 2.45.2