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AJvYcCXI3BUhf48uAyluMqHx6eb6sQDE8ZSq9OWcMPdwUs4NvztN3Zi7cIVuyM9gJrQinfADZ0iFSd2tntv6+0kVRGhzIWOOFvTFbzNqGjGb X-Gm-Message-State: AOJu0YwOK97DfmI0Z3Ek7Rxrkg5aODmK58FlH8IrUX3q43MbijAoMuuW 9KYnty0lDUFxfFhrfIkTFzbVBgB7QqIb4j0/vRvsROg/c2Zl9mIUA5OJjulpLag= X-Received: by 2002:a17:90a:128d:b0:299:1f93:237d with SMTP id g13-20020a17090a128d00b002991f93237dmr12996848pja.4.1708507279512; Wed, 21 Feb 2024 01:21:19 -0800 (PST) Received: from ubuntu-hf2.default.svc.cluster.local ([101.127.248.173]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b002995babd9b0sm8461290pjt.10.2024.02.21.01.21.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Feb 2024 01:21:19 -0800 (PST) From: Haifeng Xu To: reinette.chatre@intel.com Cc: fenghua.yu@intel.com, babu.moger@amd.com, peternewman@google.com, x86@kernel.org, linux-kernel@vger.kernel.org, Haifeng Xu Subject: [PATCH v2 1/2] x86/resctrl: Rename pseudo_lock_event.h to trace.h Date: Wed, 21 Feb 2024 09:21:00 +0000 Message-Id: <20240221092101.90740-2-haifeng.xu@shopee.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240221092101.90740-1-haifeng.xu@shopee.com> References: <20240221092101.90740-1-haifeng.xu@shopee.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791499766004023880 X-GMAIL-MSGID: 1791499766004023880 Now only pseudo-lock part uses tracepoints to do event tracking, but other parts of resctrl may need new tracepoints. It is unnecessary to create separate header files and define CREATE_TRACE_POINTS in different c files which fragments the resctrl tracing. Therefore, the new tracepoints should be placed in the same header file, and the header file needs a more generic name. No functional change. Signed-off-by: Haifeng Xu Suggested-by: Reinette Chatre --- arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 2 +- .../kernel/cpu/resctrl/{pseudo_lock_event.h => trace.h} | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-) rename arch/x86/kernel/cpu/resctrl/{pseudo_lock_event.h => trace.h} (86%) diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c index 8f559eeae08e..e7bcf8287312 100644 --- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c +++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c @@ -31,7 +31,7 @@ #include "internal.h" #define CREATE_TRACE_POINTS -#include "pseudo_lock_event.h" +#include "trace.h" /* * The bits needed to disable hardware prefetching varies based on the diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock_event.h b/arch/x86/kernel/cpu/resctrl/trace.h similarity index 86% rename from arch/x86/kernel/cpu/resctrl/pseudo_lock_event.h rename to arch/x86/kernel/cpu/resctrl/trace.h index 428ebbd4270b..495fb90c8572 100644 --- a/arch/x86/kernel/cpu/resctrl/pseudo_lock_event.h +++ b/arch/x86/kernel/cpu/resctrl/trace.h @@ -2,8 +2,8 @@ #undef TRACE_SYSTEM #define TRACE_SYSTEM resctrl -#if !defined(_TRACE_PSEUDO_LOCK_H) || defined(TRACE_HEADER_MULTI_READ) -#define _TRACE_PSEUDO_LOCK_H +#if !defined(_TRACE_RESCTRL_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_RESCTRL_H #include @@ -35,9 +35,9 @@ TRACE_EVENT(pseudo_lock_l3, TP_printk("hits=%llu miss=%llu", __entry->l3_hits, __entry->l3_miss)); -#endif /* _TRACE_PSEUDO_LOCK_H */ +#endif /* _TRACE_RESCTRL_H */ #undef TRACE_INCLUDE_PATH #define TRACE_INCLUDE_PATH . -#define TRACE_INCLUDE_FILE pseudo_lock_event +#define TRACE_INCLUDE_FILE trace #include From patchwork Wed Feb 21 09:21:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haifeng Xu X-Patchwork-Id: 204059 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:693c:2685:b0:108:e6aa:91d0 with SMTP id mn5csp925839dyc; Wed, 21 Feb 2024 01:27:46 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCWCinCeBvXynLre2u70yI09b3NLwZnVNva9ivkhI+6uHCNM0XZ3PYsfDs7P5d8sFAXgYLZcnSneDjYnVHZ3l7s1aihLiQ== X-Google-Smtp-Source: AGHT+IHI2zK/aC5jxXwlRyH5D2AhaF21ZXoMXvUSV4a5c2phgL0Ox2nYwUSw/lN1Lz2bG35DuZoK X-Received: by 2002:a05:6e02:168f:b0:365:259b:711e with SMTP id f15-20020a056e02168f00b00365259b711emr12525100ila.5.1708507662591; Wed, 21 Feb 2024 01:27:42 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1708507662; cv=pass; d=google.com; s=arc-20160816; b=gFPeH3uSNIODHGM26I+e6RjUk0KLXH8GqkW0ZXDsk2XPTswjd9dQFH8v8pSIktanOY v0fBpjkQCjfq9DsVp1I4Ufy1Q1zwHUlkrFjk7HifFtkskal/pFRSyCGuCxxWBSvfBagk DeSME2BY2cZMsCKMK4bJSamIYZhIT5ScQEKiWgYpLO8LrQkgE6+/16CigSXXcg3r3W7q fEGJ5ypGTRUHWNOgH2iou8GtBBZ31UGNhCWibP5LUcZEeadJZPSGDJ7GCdzMpTMweCge i6H1k0q2rxg+JNFSelDZdBLp3O9g82Qt18r+f+3d3emmVZ8e9CyD1qDTteC+S9om+7B5 Msvw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:message-id :date:subject:cc:to:from:dkim-signature; bh=iwEx9D6igCSX4sGVX9ELHEDN97/zM/LJ3/CzONsYs0o=; fh=cFAqpmns/25ZycLZD3wvWk4DN51buxphR76on5ndepU=; b=wK1YkaPp60N9YZQd64WoVLin9PsswwaJSBgRPjcL2+5u51Zn5LTBXm8xkH4uCQHbIN U8o57UtZZqii5llLApL2OjdELW0iGBxtANzuU1B7/Fsj4dVMUgcYKa2RZNZ/Bkfs99e7 uqmi+UK6uDzgeoz0AsEqcEVjiQGamz5utXgfM8DZucQGsfeNNhQhcMvpjx8Ub3XDgiWD 7mRJhbz3hKmdKTsd7QPZBgdnWxoij+en3HM7hd+omG2hmtp81YiRGY6HHJX7te85HfOg 50zIAQ2X2u+ZbdV2eJGRtEIU7kPs21hMc8TEL8qIiEm4FB0O+rgwc4BK3fsEB6Up3TXm YHOA==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@shopee.com header.s=shopee.com header.b=HhxJb+vT; arc=pass (i=1 spf=pass spfdomain=shopee.com dkim=pass dkdomain=shopee.com dmarc=pass fromdomain=shopee.com); spf=pass (google.com: domain of linux-kernel+bounces-74391-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) smtp.mailfrom="linux-kernel+bounces-74391-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=shopee.com Received: from sy.mirrors.kernel.org (sy.mirrors.kernel.org. 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AJvYcCXU9kgewuPdiTRF8mgZMZWh3xbjhCywlsI79jvIYIpBUspSboYvOUOKfSSD1tWNmb+M8MCM6Pd4mR3v340MLpSL9aOCOEcc150BI2b8 X-Gm-Message-State: AOJu0Yz1dInJ/iOFik1xzA+mnGBfoZiDhOM0wn5kh6zB+K0i8VgZ2HN9 Vn4ZTAn76VrAy4hdr1Wv3zBBMBUCWbzfJchzDJ6Oad3av1t8vtMRdGy/wdS78W4= X-Received: by 2002:a17:90a:d48d:b0:299:2214:5398 with SMTP id s13-20020a17090ad48d00b0029922145398mr13731626pju.13.1708507282711; Wed, 21 Feb 2024 01:21:22 -0800 (PST) Received: from ubuntu-hf2.default.svc.cluster.local ([101.127.248.173]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b002995babd9b0sm8461290pjt.10.2024.02.21.01.21.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Feb 2024 01:21:22 -0800 (PST) From: Haifeng Xu To: reinette.chatre@intel.com Cc: fenghua.yu@intel.com, babu.moger@amd.com, peternewman@google.com, x86@kernel.org, linux-kernel@vger.kernel.org, Haifeng Xu Subject: [PATCH v2 2/2] x86/resctrl: Add tracepoint for llc_occupancy tracking Date: Wed, 21 Feb 2024 09:21:01 +0000 Message-Id: <20240221092101.90740-3-haifeng.xu@shopee.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240221092101.90740-1-haifeng.xu@shopee.com> References: <20240221092101.90740-1-haifeng.xu@shopee.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791500131026270042 X-GMAIL-MSGID: 1791500131026270042 In our production environment, after removing monitor groups, those unused RMIDs get stuck in the limbo list forever because their llc_occupancy are always larger than the threshold. But the unused RMIDs can be successfully freed by turning up the threshold. In order to know how much the threshold should be, the following steps can be taken to acquire the llc_occupancy of RMIDs in each rdt domain: 1) perf probe -a '__rmid_read eventid rmid' perf probe -a '__rmid_read%return $retval' 2) perf record -e probe:__rmid_read -e probe:__rmid_read__return -aR sleep 10 3) perf script > __rmid_read.txt 4) cat __rmid_read.txt | grep "eventid=0x1 " -A 1 | grep "kworker" > llc_occupnacy.txt Instead of using perf tool to track llc_occupancy and filter the log manually, it is more convenient for users to use tracepoint to do this work. So add a new tracepoint that shows the llc_occupancy of busy RMIDs when scanning the limbo list. Signed-off-by: Haifeng Xu Suggested-by: Reinette Chatre --- arch/x86/kernel/cpu/resctrl/monitor.c | 2 ++ arch/x86/kernel/cpu/resctrl/trace.h | 13 +++++++++++++ 2 files changed, 15 insertions(+) diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c index f136ac046851..1533b1932b49 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -23,6 +23,7 @@ #include #include "internal.h" +#include "trace.h" struct rmid_entry { u32 rmid; @@ -302,6 +303,7 @@ void __check_limbo(struct rdt_domain *d, bool force_free) } } crmid = nrmid + 1; + trace_mon_llc_occupancy_limbo(nrmid, d->id, val); } } diff --git a/arch/x86/kernel/cpu/resctrl/trace.h b/arch/x86/kernel/cpu/resctrl/trace.h index 495fb90c8572..4bf95b7b4db8 100644 --- a/arch/x86/kernel/cpu/resctrl/trace.h +++ b/arch/x86/kernel/cpu/resctrl/trace.h @@ -35,6 +35,19 @@ TRACE_EVENT(pseudo_lock_l3, TP_printk("hits=%llu miss=%llu", __entry->l3_hits, __entry->l3_miss)); +TRACE_EVENT(mon_llc_occupancy_limbo, + TP_PROTO(u32 mon_hw_id, int id, u64 occupancy), + TP_ARGS(mon_hw_id, id, occupancy), + TP_STRUCT__entry(__field(u32, mon_hw_id) + __field(int, id) + __field(u64, occupancy)), + TP_fast_assign(__entry->mon_hw_id = mon_hw_id; + __entry->id = id; + __entry->occupancy = occupancy;), + TP_printk("mon_hw_id=%u domain=%d llc_occupancy=%llu", + __entry->mon_hw_id, __entry->id, __entry->occupancy) + ); + #endif /* _TRACE_RESCTRL_H */ #undef TRACE_INCLUDE_PATH