From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fra-out-005.esa.eu-central-1.outbound.mail-perimeter.amazon.com (fra-out-005.esa.eu-central-1.outbound.mail-perimeter.amazon.com [63.176.194.123]) (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 B89BF32B9BD for ; Thu, 20 Nov 2025 10:31:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=63.176.194.123 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763634668; cv=none; b=sd6oHKraKuQ/i8L0u6ywXcxTlMk4e20r3mZYpBfy4R6Tzy6Zwz8Ew9H6J5y0Sh0KgrWY/6rCsNBMo4WZloeXXIfntHGUe/occuqRmTu5SU2JHtyskRjf4M5Uig8UVJzC2N07Bn600XhSbGcML42TA7mUTHiUQ4zg6pTIIax89Hk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763634668; c=relaxed/simple; bh=OaOiv7OEx6Voh49k/OAdu+STLq+HtsgT9fZBHNMkIKQ=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ew3skJZPhJAXu2rtiFBRNOdrR6XEilwANI82QQQIu5GLkNZ1u2Aw0ShL+nVmGoHCfBgZAGN4z8f1aLm1ckzdOs9Q0tJob8UDYS3Bm985D3bInW4eGq4mXRqoJT37K6mbrfEAthj4KTc2TCzCmjGUcud3dVErcbC7wtbT5iGxFcA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com; spf=pass smtp.mailfrom=amazon.com; dkim=pass (2048-bit key) header.d=amazon.com header.i=@amazon.com header.b=Iy8QXNgM; arc=none smtp.client-ip=63.176.194.123 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=amazon.com header.i=@amazon.com header.b="Iy8QXNgM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazoncorp2; t=1763634666; x=1795170666; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=OaOiv7OEx6Voh49k/OAdu+STLq+HtsgT9fZBHNMkIKQ=; b=Iy8QXNgMfVhlef38dJUWeyaGTuSdt27MhDBc19pHUQx2kymdsddm5Dco KEgTDqGMt09FhE3j8bEUgPSzgIm3JD7Ki/Dgew7IAicjnuj7kdlrzPfZS J3/xUIPInX3zd+MkQoXAI9QpVtaE9drNmPzOVyBFPmesJl5kx1IM18aI9 0D6yh/jVE7iHgW1zt0O+uADccPv/IzPdhz06IG8mWRAw2sWSEpFkJ709Y xwT/xfGk1Y2Xkx2ocjLtKuHAKpES36Leer42J6ddR3KfW0N0GVlcireiu XPXKGuuQonWxl+qVl1Z+i7S4c3Jg4E8VVK2L8MYDHNobpzj/VdHFv8VUv w==; X-CSE-ConnectionGUID: scyM88JSSd2lSHWpekiOqQ== X-CSE-MsgGUID: 5iVDMXnJTB+MnEpP2XmHtA== X-IronPort-AV: E=Sophos;i="6.19,317,1754956800"; d="scan'208";a="5520302" Received: from ip-10-6-6-97.eu-central-1.compute.internal (HELO smtpout.naws.eu-central-1.prod.farcaster.email.amazon.dev) ([10.6.6.97]) by internal-fra-out-005.esa.eu-central-1.outbound.mail-perimeter.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Nov 2025 10:30:47 +0000 Received: from EX19MTAEUB001.ant.amazon.com [54.240.197.226:4464] by smtpin.naws.eu-central-1.prod.farcaster.email.amazon.dev [10.0.42.24:2525] with esmtp (Farcaster) id 1106f178-bac3-4e5d-81e7-472736dfbd05; Thu, 20 Nov 2025 10:30:47 +0000 (UTC) X-Farcaster-Flow-ID: 1106f178-bac3-4e5d-81e7-472736dfbd05 Received: from EX19D003EUB001.ant.amazon.com (10.252.51.97) by EX19MTAEUB001.ant.amazon.com (10.252.51.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.29; Thu, 20 Nov 2025 10:30:39 +0000 Received: from u5934974a1cdd59.ant.amazon.com (10.1.212.9) by EX19D003EUB001.ant.amazon.com (10.252.51.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.29; Thu, 20 Nov 2025 10:30:30 +0000 From: Fernand Sieber To: K Prateek Nayak CC: , , , , , , , , , , , , Subject: Re: [PATCH 4/4] sched/fair: Add more core cookie check in wake up fast path Date: Thu, 20 Nov 2025 12:30:00 +0200 Message-ID: <20251120103001.978744-1-sieberf@amazon.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: EX19D046UWA001.ant.amazon.com (10.13.139.112) To EX19D003EUB001.ant.amazon.com (10.252.51.97) Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Prateek, On 9/24/2025 9:51 AM, K Prateek Nayak wrote: > Yes, that would be great! Thank you. And also please include some > benchmark numbers either in improved core utilization or the benchmark > results actually improving from these changes. > > It would be great to know how much things improve by :) I've run some benchmarking and I've determined most of the perf gains I observed can be isolated to a subset of the changes in this series. Therefore I've repackaged it in a single patch, which also considers other feedback gathered in this series: https://lore.kernel.org/lkml/20251120101955.968586-1-sieberf@amazon.com/T/#u I've also included benchmark test results. This current patch series can be cancelled in favor of the new patch. -- Thanks, Fernand Amazon Development Centre (South Africa) (Proprietary) Limited 29 Gogosoa Street, Observatory, Cape Town, Western Cape, 7925, South Africa Registration Number: 2004 / 034463 / 07