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[81.40.121.121]) by smtp.gmail.com with ESMTPSA id x2sm6767121wrg.73.2020.08.21.12.54.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Aug 2020 12:54:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1598039656; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=969biaX/G7f1D/6G5QoxlHmmKW8KQsbMUTT5iH7LPeo=; b=MZe7UayP0qNjMGiEb7tb5/oppge9VcgM/UO5zPI0zaL8w5AZ1zMo8/hhIrsDHXkBegyL68 SLAjj/eEIriMQ607usr1vfyVtYBmJY2/vHZ0BXizRcgjg8mpsaV5fWhg24xtPuQBUFjfV0 9343mAlUsCzRuJxIGy5ktE9clYr+oWE= X-MC-Unique: 0MFAZjN0NMSZqWvBztomWA-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=969biaX/G7f1D/6G5QoxlHmmKW8KQsbMUTT5iH7LPeo=; b=UK0AFU0vjSg5gtBaZ+V6cK6ZywkdPCzhs5pDoOxVQ/qpYGednWOokaS0g+d7gMZK9r rg+7ZzrEfSgmoTTfwx/FyXps5h9PnJgZGmzH5nrEo44itfM+J8fBBUmq7F8uPeeuFFQG fgW1w411b80vrbm3Gnmj9QoQqOwF364/OmIIDlVvpBlu4Imd9vxLMevkOMtF9dMm9Gkk bO0yAH1EHIwowoOiUFQgSwQftoBumd0sjsCrpuez7Gl5DjhW6QPEeE3nu1sHDwdXzqPl Ne6+5YffeEaeN9kTPiIOGgYYOclspf47UuuD8l6gVTgdSkfrvN3Tc1m8pm5aZ3nl6t+o 0O2Q== X-Gm-Message-State: AOAM532Nij0ZDr6zkZFzAk+qldOpoadhhwfSgcsHk0WuyfGGlN8anKOf BK/C9qW3xmV5BocVDUs2vc0zVyDjK1wRjUMEPpO/khGVVWNFx5eVLhJjpY9yykuyIsqJm7paHlm WsvA0RNe3KlDvpKM= X-Received: by 2002:a5d:60c2:: with SMTP id x2mr2400675wrt.73.1598039653155; Fri, 21 Aug 2020 12:54:13 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzZMtp1rDhksvpZhU0EoNPybYyltpwgKpxYxPw5/0AcKlG4wRhNKIQcnM0oRFyzHHd/p2Ck1w== X-Received: by 2002:a5d:60c2:: with SMTP id x2mr2400660wrt.73.1598039653005; Fri, 21 Aug 2020 12:54:13 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v6 02/15] block/nvme: Avoid further processing if trace event not enabled Date: Fri, 21 Aug 2020 21:53:46 +0200 Message-Id: <20200821195359.1285345-3-philmd@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200821195359.1285345-1-philmd@redhat.com> References: <20200821195359.1285345-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0.002 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8"; text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/21 02:43:55 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=-1, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Fam Zheng , qemu-block@nongnu.org, Max Reitz , Stefan Hajnoczi , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Avoid further processing if TRACE_NVME_SUBMIT_COMMAND_RAW is not enabled. This is an untested intend of performance optimization. Reviewed-by: Stefan Hajnoczi Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- block/nvme.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/block/nvme.c b/block/nvme.c index 2f5e3c2adfa..8c30a5fee28 100644 --- a/block/nvme.c +++ b/block/nvme.c @@ -441,6 +441,9 @@ static void nvme_trace_command(const NvmeCmd *cmd) { int i; =20 + if (!trace_event_get_state_backends(TRACE_NVME_SUBMIT_COMMAND_RAW)) { + return; + } for (i =3D 0; i < 8; ++i) { uint8_t *cmdp =3D (uint8_t *)cmd + i * 8; trace_nvme_submit_command_raw(cmdp[0], cmdp[1], cmdp[2], cmdp[3], --=20 2.26.2