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 X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DEF82C43387 for ; Tue, 18 Dec 2018 04:51:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AD078217D8 for ; Tue, 18 Dec 2018 04:51:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="o38O87s2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726674AbeLREvm (ORCPT ); Mon, 17 Dec 2018 23:51:42 -0500 Received: from mail-pl1-f195.google.com ([209.85.214.195]:38040 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726601AbeLREvm (ORCPT ); Mon, 17 Dec 2018 23:51:42 -0500 Received: by mail-pl1-f195.google.com with SMTP id e5so7236543plb.5; Mon, 17 Dec 2018 20:51:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references; bh=LNjZOu9ti/CUDcrkv4geNqby8F0/i8MG9p2fY1WFuZ4=; b=o38O87s2nTdZWz0DcU/hO0OYs5kgvygwn/D3tK7NDJy1e2vebQ14afy6tSY9wkXVxu OUb9Kh+lrVr9pBw8TRgXBoPOdLeXMXa0DPtRFcYHKilks1wWPA5XGQAjNAEQPrXjMFhL g/ZtZ4O4tLg28gQkrRxtLJqLVlA3+hItmqovvq3uGzCtbLwI9lVBm/pm2iCM3nDFvw4C cbnGOPZUcgWX5ot0ulalNmHb+ZwyOAlAwtqVcFibpcJBno+OUIYwzVkEEvyRhbKlTiVv adEdYEKyHWMu9FvyKIWFFMOSKu4dZoI48ul385uf/DBbrQBKuI/8S5ukJelkz9A8VQ8N A1iQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references; bh=LNjZOu9ti/CUDcrkv4geNqby8F0/i8MG9p2fY1WFuZ4=; b=t10W8anrkBUNI5wmHYU2XoJ3nopvb0JpMWv/jLixURHYhy8dBMqG9XZDTzQ2YeoXIP HGPLK0Ok69S6GTd1YhsBnmP6uHAx4rY5fALVClP2ifJMgyjWzxzMl1sd30KfbVpQ5y5T v1DikpmbKC3Fl4Vu+ZsMse/KZZb8BSlLZMxvPrbEtS/A1yWP1kbTchfRXAHrDqcgEVlP SO65fcdWpru49PYYGLS70gwzJZfTwK2CZkOqPi6JxBNPYo+ryzNPgD4b7Zlg/l4w9GcE SNuudeRmqJaKiIO7C2g5MueVWl3VpfFG12xOSX1K+JFpAHgYmkqaOGjfysd1+D5toO9p Adjg== X-Gm-Message-State: AA+aEWaz/h/TeCXLLFaW0FnIVi656heYQhJMO/Hg0a3NNxUbv7qKH5QM J0tbEXR9KYqD98vUgBUa8vzRHyTs6N4= X-Google-Smtp-Source: AFSGD/VXyvdab3SEHK9Yz4r21Xx/jFw8mFcOLerZSE+Ov8W/cXKEG3624w23vEUpKR79S7eZHJHeeA== X-Received: by 2002:a17:902:e085:: with SMTP id cb5mr14991076plb.24.1545108701367; Mon, 17 Dec 2018 20:51:41 -0800 (PST) Received: from localhost.localdomain ([2601:602:9602:6598:1820:defd:529e:3b95]) by smtp.gmail.com with ESMTPSA id e9sm18164152pff.5.2018.12.17.20.51.40 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Dec 2018 20:51:40 -0800 (PST) From: yupeng To: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, keith.busch@intel.com, axboe@fb.com, hch@lst.de, sagi@grimberg.me, jthumshirn@suse.de Subject: [PATCH v4 2/2] trace nvme submit queue status Date: Mon, 17 Dec 2018 20:51:38 -0800 Message-Id: <20181218045138.4282-2-yupeng0921@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181218045138.4282-1-yupeng0921@gmail.com> References: <20181218045138.4282-1-yupeng0921@gmail.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org export nvme disk name, queue id, sq_head, sq_tail to trace event usage example: go to the event directory: cd /sys/kernel/debug/tracing/events/nvme/nvme_sq filter by disk name: echo 'disk=="nvme1n1"' > filter enable the event: echo 1 > enable check results from trace_pipe: cat /sys/kernel/debug/tracing/trace_pipe In practice, this patch help me debug hardware related performant issue. Signed-off-by: yupeng --- drivers/nvme/host/pci.c | 5 +++++ drivers/nvme/host/trace.c | 2 ++ drivers/nvme/host/trace.h | 21 +++++++++++++++++++++ 3 files changed, 28 insertions(+) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index c33bb201b884..52df2f7fef37 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -32,6 +32,7 @@ #include #include +#include "trace.h" #include "nvme.h" #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) @@ -899,6 +900,10 @@ static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx) } req = blk_mq_tag_to_rq(*nvmeq->tags, cqe->command_id); + trace_nvme_sq(req->rq_disk, + nvmeq->qid, + le16_to_cpu(cqe->sq_head), + nvmeq->sq_tail); nvme_end_request(req, cqe->status, cqe->result); } diff --git a/drivers/nvme/host/trace.c b/drivers/nvme/host/trace.c index 8ca7079ed2bc..7bfaace23e1e 100644 --- a/drivers/nvme/host/trace.c +++ b/drivers/nvme/host/trace.c @@ -142,3 +142,5 @@ const char *nvme_trace_disk_name(struct trace_seq *p, char *name) return ret; } EXPORT_SYMBOL_GPL(nvme_trace_disk_name); + +EXPORT_TRACEPOINT_SYMBOL(nvme_sq); diff --git a/drivers/nvme/host/trace.h b/drivers/nvme/host/trace.h index 196d5bd56718..3606cd7000f4 100644 --- a/drivers/nvme/host/trace.h +++ b/drivers/nvme/host/trace.h @@ -184,6 +184,27 @@ TRACE_EVENT(nvme_async_event, #undef aer_name +TRACE_EVENT(nvme_sq, + TP_PROTO(void *rq_disk, int qid, int sq_head, int sq_tail), + TP_ARGS(rq_disk, qid, sq_head, sq_tail), + TP_STRUCT__entry( + __array(char, disk, DISK_NAME_LEN) + __field(int, qid) + __field(int, sq_head) + __field(int, sq_tail) + ), + TP_fast_assign( + __assign_disk_name(__entry->disk, rq_disk); + __entry->qid = qid; + __entry->sq_head = sq_head; + __entry->sq_tail = sq_tail; + ), + TP_printk("nvme: %s qid=%d head=%d tail=%d", + __print_disk_name(__entry->disk), + __entry->qid, __entry->sq_head, __entry->sq_tail + ) +); + #endif /* _TRACE_NVME_H */ #undef TRACE_INCLUDE_PATH -- 2.17.1