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Tue, 18 May 2021 07:14:19 -0700 (PDT) Received: from leoy-ThinkPad-X240s ([204.124.180.30]) by smtp.gmail.com with ESMTPSA id z22sm9465543pfa.157.2021.05.18.07.14.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 May 2021 07:14:18 -0700 (PDT) Date: Tue, 18 May 2021 22:14:10 +0800 From: Leo Yan To: Denis Nikitin Cc: Mathieu Poirier , Mike Leach , "coresight@lists.linaro.org" , "linux-arm-kernel@lists.infradead.org" , Daniel Kiss Subject: Re: [PATCH 0/4] coresight: Add ETR-PERF polling. Message-ID: <20210518141410.GD942578@leoy-ThinkPad-X240s> References: <20210421120413.3110775-1-daniel.kiss@arm.com> <20210426175425.GA1391779@xps15> <20210427154746.GA1422814@xps15> <20210427160443.GA208852@leoy-ThinkPad-X240s> <20210505152919.GA1766375@xps15> <20210518140040.GC942578@leoy-ThinkPad-X240s> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210518140040.GC942578@leoy-ThinkPad-X240s> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210518_071421_233737_44E22C2C X-CRM114-Status: GOOD ( 17.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, May 18, 2021 at 10:00:40PM +0800, Leo Yan wrote: [...] > > We could probably utilize the ETM strobing feature and reduce frequency > > of data collection but I see a problem when I'm using both. > > Within a minute of profiling the ETM generates a reasonable profile size > > (with strobing autofdo,preset=9 with period 0x1000 it is up to 20MB). > > But then the size grows unproportionally. > > With a 4 minute run I got a 6.3GB profile. > > > > I don't see such a problem with the ETR polling patch. > > > > Leo, could you please take a look at this problem? Or in the other way, could you share the perf data files? Base on the perf data files, I think at least we can confirm what's the AUX trace data size for every period, and we might also can quickly confirm if the strobing configurations are lost or not in the middle of tracing (To be honest, I have no knowledge for strobing, so need Mike's help for confirmation). Thanks, Leo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel