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Thu, 12 Dec 2024 07:48:16 -0800 (PST) X-Google-Smtp-Source: AGHT+IGPix9C8uCaj6LZMikkfSHUwHn+pJx/n6e5nZyKYbsbiwaBlM8LktHdIf+mt7M7yJz9DNc2YQ== X-Received: by 2002:a05:6214:2405:b0:6d4:287d:b8d6 with SMTP id 6a1803df08f44-6db0f7334d4mr14607716d6.18.1734018496300; Thu, 12 Dec 2024 07:48:16 -0800 (PST) Received: from fionn ([142.189.102.234]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6dae0f64eafsm13407676d6.100.2024.12.12.07.48.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Dec 2024 07:48:15 -0800 (PST) Date: Thu, 12 Dec 2024 10:48:14 -0500 (EST) From: John Kacur To: EnDe Tan cc: "linux-rt-users@vger.kernel.org" , "mtosatti@redhat.com" , "williams@redhat.com" , Leyfoon Tan , "endeneer@gmail.com" Subject: RE: [1/1] rt-tests: determine_maximum_mpps.sh: Introduce '-F' option to specify CPU frequency In-Reply-To: Message-ID: <39f55b99-a8c7-5941-ee82-442e2cd9ead7@redhat.com> References: <20241211171158.1344674-1-ende.tan@starfivetech.com> Precedence: bulk X-Mailing-List: linux-rt-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Thu, 12 Dec 2024, EnDe Tan wrote: > > Are there other places to get this information, for example > > /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq > It is possible to specify "clock-frequency" in CPU nodes in device tree, > which corresponds to entry like this > /sys/devices/system/cpu/cpu0/of_node/clock-frequency > > However, it's not mandatory to specify "clock-frequency", so maybe > adding a '-F' option is more useful. > > But why we would want to allow the user to specify a potentially arbitrary number, when we can get a more accurate one from the OS? Do you have any comments Marcelo? John