From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3702F389DEB for ; Wed, 4 Feb 2026 13:27:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770211639; cv=none; b=RDLikn+4XUNCDRjaY7NPGRwOkH6QSAKC8Ww+8ZaHFXWzBY2l7sNFp1z5h7J7wGMNez6xP0NIM0UDoeY4meMJsnyCnMVk4oqNkS+L5qXuXuHLZtHd5lXYNLMe02lzyMGHQxm6y6KjPF2c36GpZVYOyGXa+NTRBef7hL3/CxRyH1c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770211639; c=relaxed/simple; bh=whL+h8LjF+UpIGfkfrMO4RaOwKoVnZEgHP4PL8jJDfs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WcTaT9Mj9LYO3oNvbtzDRySgNQXX6la6Ed0vcF/6kTKXB/mvqsEiRnDIF3+XtV5dLYo9/x1oOUWIheYzR2Rk8g1iyHugVO7ia2As8PqKJxAVBs/CJ6DmD1lQRMVfQLCUrDIzBZ1wSGtYQwiynlqDeqyFCiODwoqIywWFs9mqDCk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=cqDLUiCE; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="cqDLUiCE" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=L7HW6CHNnsGjMm93V9deT2KAnMoB7NaHcE4pmWmC+LI=; b=cqDLUiCEkKve5/3wJ/S1nKzvcw Pqx9UU/WkTJW3a68guxMkkl1ZRwg2bXCdCDWGcL6KnqQ7/ccvzxZAkMI2umcax2jonC49AznXadOk 1gD7FKmBBtnRWhJoTO8TrjwOm2mMrO4u5bOdAQVcdgt0wpnm7mcfJxEmpodpWM3u/czSyIJxYULpO v0iOxeKJFqauEAkLZrRx3fdAHfktygH2u3q1ml0rZPt5mlHLTtuczsQDHClYktSLSmGKf9BJYoQW2 KlBigoiqx/s8PAZDCb9afBjv0/kTwxgXipFdeQZEUOPFjVmvoio8gjb/mnrlJOOineVuNeWO1Kln3 SHZ5cQeQ==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1vncuU-000000027lk-2ebz; Wed, 04 Feb 2026 13:27:10 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 2FBD0300E8B; Wed, 04 Feb 2026 14:27:10 +0100 (CET) Date: Wed, 4 Feb 2026 14:27:10 +0100 From: Peter Zijlstra To: "Mohamed Abuelfotoh, Hazem" Cc: Mario Roy , Chris Mason , Joseph Salisbury , Adam Li , Josh Don , mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 4/4] sched/fair: Proportional newidle balance Message-ID: <20260204132710.GK2995752@noisy.programming.kicks-ass.net> References: <20251107161739.770122091@infradead.org> <8760001e-0274-454c-a4e4-1f38a9695b88@gmail.com> <3ef2a178-db96-4a2c-9e74-44ba81bef030@amazon.com> <20260127084412.GV171111@noisy.programming.kicks-ass.net> <20260129091937.GY166857@noisy.programming.kicks-ass.net> <683b4860-1076-43b8-8fb9-ca8ac26cd8f4@amazon.com> <20260202105144.GC1282955@noisy.programming.kicks-ass.net> <6237f4ee-6b07-4d79-8ee7-04e49a4e99b7@amazon.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, Feb 04, 2026 at 12:45:41PM +0000, Mohamed Abuelfotoh, Hazem wrote: > Version | Benchmark name | SUT EC2 Instance| diff % > v6.12.66 | postgresql | c7a.4xlarge | -4.0% > v6.12.66 | nginx_lb | c7a.4xlarge | -5.0% > v6.12.66 | memcached | c7a.4xlarge | -11.0% > v6.12.66_proposed | postgresql | c7a.4xlarge | -4.0% > v6.12.66_proposed | nginx_lb | c7a.4xlarge | -5.0% > v6.12.66_proposed | memcached | c7a.4xlarge | -13.0% *sigh*, that actually made it worse for memcached :/ I'm not familiar with the memcached benchmark, is this something I can run on a single machine, or does it require high speed networking and 2 machines?