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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 50806C433E5 for ; Mon, 20 Jul 2020 02:22:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2809C2177B for ; Mon, 20 Jul 2020 02:22:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="qEvGlo6b" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727115AbgGTCWD (ORCPT ); Sun, 19 Jul 2020 22:22:03 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:12405 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726510AbgGTCWC (ORCPT ); Sun, 19 Jul 2020 22:22:02 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1595211721; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=mziV6dw1w86ytw+21xecioLH5sETgcRtWY7LRJxfINk=; b=qEvGlo6b2sjuHa0AnTyuG9n4QDJ4pBV8ZeMXCQ9hN7BVamGFkxo/hIqYoz60xDTG4sjC2/7O f01V7dH/yXmkCHQpLPG7z4EAChITTP5Ghk9p3qbXf1HojQpXQap7jVt0n14RwI102X6nM+4M qCo9y2ZLh9fUcUCZvatjEz1s5EY= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n05.prod.us-west-2.postgun.com with SMTP id 5f14ffb78e36ecda3058b4e5 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 20 Jul 2020 02:21:43 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 6E0AAC433C6; Mon, 20 Jul 2020 02:21:43 +0000 (UTC) Received: from tingweiz-gv.qualcomm.com (unknown [180.166.53.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: tingwei) by smtp.codeaurora.org (Postfix) with ESMTPSA id A53ADC433C9; Mon, 20 Jul 2020 02:21:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org A53ADC433C9 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=tingwei@codeaurora.org From: Tingwei Zhang To: Steven Rostedt , Ingo Molnar Cc: Tingwei Zhang , tsoni@codeaurora.org, Sai Prakash Ranjan , Mao Jinlong , linux-kernel@vger.kernel.org Subject: [PATCH 4/4] stm class: ftrace: use different channel accroding to CPU Date: Mon, 20 Jul 2020 10:21:17 +0800 Message-Id: <20200720022117.9375-5-tingwei@codeaurora.org> X-Mailer: git-send-email 2.20.0 In-Reply-To: <20200720022117.9375-1-tingwei@codeaurora.org> References: <20200720022117.9375-1-tingwei@codeaurora.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To avoid mixup of packets from differnt ftrace packets simultaneously, use different channel for packets from different CPU. Signed-off-by: Tingwei Zhang --- drivers/hwtracing/stm/ftrace.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/hwtracing/stm/ftrace.c b/drivers/hwtracing/stm/ftrace.c index ce868e095410..6c3bce11c8d3 100644 --- a/drivers/hwtracing/stm/ftrace.c +++ b/drivers/hwtracing/stm/ftrace.c @@ -10,7 +10,7 @@ #include #include -#define STM_FTRACE_NR_CHANNELS 1 +#define STM_FTRACE_NR_CHANNELS NR_CPUS #define STM_FTRACE_CHAN 0 static int stm_ftrace_link(struct stm_source_data *data); @@ -37,8 +37,9 @@ static void notrace stm_ftrace_write(struct trace_export *export, const void *buf, unsigned int len) { struct stm_ftrace *stm = container_of(export, struct stm_ftrace, ftrace); + unsigned int cpu = smp_processor_id(); - stm_source_write(&stm->data, STM_FTRACE_CHAN, buf, len); + stm_source_write(&stm->data, STM_FTRACE_CHAN + cpu, buf, len); } static int stm_ftrace_link(struct stm_source_data *data) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project