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[130.180.211.218]) by smtp.googlemail.com with ESMTPSA id bw28-20020a0560001f9c00b0033b66ce7ae9sm13597553wrb.84.2024.02.14.13.39.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 14 Feb 2024 13:39:09 -0800 (PST) Message-ID: <79fadb9b-c4c8-4727-b812-7e519556cce1@linaro.org> Date: Wed, 14 Feb 2024 22:39:09 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFD] Remove irq_timings Content-Language: en-US To: Thomas Gleixner Cc: LKML , Ulf Hansson , Daniel Bristot de Oliveira References: <875xyqg2yr.ffs@tglx> From: Daniel Lezcano In-Reply-To: <875xyqg2yr.ffs@tglx> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Thomas, On 14/02/2024 22:17, Thomas Gleixner wrote: > Daniel! > > It's 7 years now that we merged irq timings into the kernel, but we > still have zero users for this. > > I'm tempted to declare this experiment failed and remove the whole thing > for good. > > Comments? I worked on an irq cpuidle governor which had better results than the menu governor and equal than the teo governor. But I never succeed to have better results without putting some arbitrary when computing the next event. At one moment, Daniel Bristot de Oliveira (Cc'ed) was thinking to may be use it for the deadline scheduler. Ulf (Cc'ed) may be has a plan for the next event for the CPU cluster. But if no one has plan to use it, there is no good reason to keep it and I'm fine if we remove it. -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog