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[58.152.48.195]) by smtp.gmail.com with ESMTPSA id k12-20020a170902d58c00b0016366fbc155sm1695092plh.255.2022.05.26.09.08.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 May 2022 09:08:22 -0700 (PDT) Date: Fri, 27 May 2022 00:08:17 +0800 From: Leo Yan To: Carsten Haitzler Cc: linux-kernel@vger.kernel.org, coresight@lists.linaro.org, suzuki.poulose@arm.com, mathieu.poirier@linaro.org, mike.leach@linaro.org, linux-perf-users@vger.kernel.org, acme@kernel.org Subject: Re: [PATCH 3/3] perf test: Add coresight tests to guage quality of data generated Message-ID: <20220526160817.GE795802@leoy-ThinkPad-X240s> References: <20220309122859.31487-1-carsten.haitzler@foss.arm.com> <20220309122859.31487-3-carsten.haitzler@foss.arm.com> <20220410083041.GA184647@leoy-ThinkPad-X240s> <050209c2-c784-e255-4e75-5c8674c5cfe0@foss.arm.com> <20220526082039.GA795802@leoy-ThinkPad-X240s> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220526082039.GA795802@leoy-ThinkPad-X240s> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 26, 2022 at 04:20:39PM +0800, Leo Yan wrote: [...] > Yes, my Juno board has 8GB but I also have DB410c with 1GB with quad > coes [1]. I am still concern for 256MB buffer size, it's not friendly for > embedded system, and even not good for server. For example, if we run > this testing on Arm server with 96 cores (like Hisilicon D06 board), > then we need the buffer size is: > > 256MiB * 96 = 16GiB Correct for my bad math... here should be 256MiB * 96 = 24GiB.