From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 3D17A28980F for ; Wed, 27 Aug 2025 14:05:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756303558; cv=none; b=WCG2PKN5randl5vDLkjxwx2XRCyaHsNCljdJ2Y8ncg2+u1hb/fMYua5SPZfgd6S6zJaYaTKFDAJ7ETpiUdZPqVfoJ24QxuynNus3xImq/E476DET8tgbp++gqg6h534xxH1ohmojE4uIGh06HjlQBjAWJQw9MdlbS9lKKYEowvQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756303558; c=relaxed/simple; bh=e5BVtBpCtOJyC1Pkcou+8CrjG0HCXemPLs+PbZIHaVE=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=SW2jvoZiBKW28G3A9CA0SHHh6Vc4R7SY9PuhIzVmkM3lRtSyDCO2tiOGjpfrmqRrVrvhi6y05xnZNR0F4OtaNF72Z0kzcapkRuVk2j+2qzhjp7AQgbAb3IimAQCsRY6+igd+W2wLeCArjkrHw3K2bejR3lnCWhv0dzvtdRls9Iw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=3HJvKnkw; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=o9vwByD2; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="3HJvKnkw"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="o9vwByD2" From: Kurt Kanzenbach DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1756303554; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=e5BVtBpCtOJyC1Pkcou+8CrjG0HCXemPLs+PbZIHaVE=; b=3HJvKnkwWt5wuklmTFsJb/PzlNIcYTM4h7cjpMMqG5CQWR6XwrDxpFuYyDCdcvj/9VPvwj pXr0x5NRwx0ft2sJxyjSczgRlC/MHWS9YvBLIdH87DxuRAfR9f1tyPCQXj6+KyMstE+aJH P07PbJrfHlguQjqr55XZFcvSLudkNsHHwZwhMExEMLAv4v3742KNRU/2Lj6VCtZjKI6OL3 ac1t/2Ch/A/1+f9JEHUgxM2B4amIKvo3Xalc4VvNVJqTwZYqbeRWR+EChd+AduTjG/lEG8 3LWyItZLxsBVb8x9v6qQvMqyhQ9va2r16D2arm/EXQ+L9hYN7EGw8ZYYHf2Wxg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1756303554; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=e5BVtBpCtOJyC1Pkcou+8CrjG0HCXemPLs+PbZIHaVE=; b=o9vwByD2aTF8gtV+jrXX286j+J01pXzFjFqxqa0SjLlQjrFlq946R8Zxg1mauNIkOSR+Qb 7tKXucAwX6x5qNBA== To: Miroslav Lichvar , Sebastian Andrzej Siewior Cc: Jacob Keller , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Richard Cochran , Vinicius Costa Gomes , Paul Menzel , Vadim Fedorenko , intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org Subject: Re: [PATCH iwl-next v2] igb: Convert Tx timestamping to PTP aux worker In-Reply-To: References: <20250822-igb_irq_ts-v2-1-1ac37078a7a4@linutronix.de> <20250822075200.L8_GUnk_@linutronix.de> <87ldna7axr.fsf@jax.kurt.home> <02d40de4-5447-45bf-b839-f22a8f062388@intel.com> <20250826125912.q0OhVCZJ@linutronix.de> Date: Wed, 27 Aug 2025 16:05:53 +0200 Message-ID: <878qj4q2pq.fsf@jax.kurt.home> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" --=-=-= Content-Type: text/plain On Wed Aug 27 2025, Miroslav Lichvar wrote: > On Tue, Aug 26, 2025 at 02:59:12PM +0200, Sebastian Andrzej Siewior wrote: >> The benchmark is about > 1k packets/ second while in reality you have >> less than 20 packets a second. > > I don't want to argue about which use case is more important, but it's > normal for NTP servers to receive requests at much higher rates than > that. In some countries, public servers get hundreds of thousands of > packets per second. A server in a local network may have clients > polling 128 times per second each. > > Anyway, if anyone is still interested in finding out the cause of > the regression, there is a thing I forgot to mention for the > reproducer using ntpperf. chronyd needs to be configured with a larger > clientloglimit (e.g. clientloglimit 100000000), otherwise it won't be > able to respond to the large number of clients in interleaved mode > with a HW TX timestamp. Yeah, I realized that myself while testing :). The default clientloglimit is too low. Thanks, Kurt --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQJHBAEBCgAxFiEEvLm/ssjDfdPf21mSwZPR8qpGc4IFAmivEMETHGt1cnRAbGlu dXRyb25peC5kZQAKCRDBk9HyqkZzgluMD/47MKWmL3M7Yq+ds4JgDuT8hQ0abUGI e3sT05iKddJemgYsc9tyMQ8C8DfHVOwRKZ82/ZiZ8J5cltb/5kWWYYGKjDLU8tsE pTGpDh/NEcEUZlC9Vz+joROWnZSsYIoMa5Nc758d+eNIXzlykesYjsnnMQ3uYb8F CWzY1K97uz6lwBbKyXN2S4clWL1PwAKfVrYzkunTsfvpljq5JwdvmfP1dZuYqHmN iEi+dlbMry8pMN3Nu5Gf0kin4TkjFDa2H4GFaMjdnFhh1srNK7cPzAGO3p6dIGJH lHvqeHJp0a2xP86XZyrT9l5Lk25VEG3rFidmO2D5ekbAT2hTBYzNtnkmM+qA1gbF jaH2VovcgJ1Okg4SxCqEtoXabcVP+/mJIlOmdpmUiGs4VeLq18DxjwBa5jJnBCzt xgUuIXiCp/7j4bBQTdbyN8CYyV8hF+jCs5npSUCTeWqGFpkcOSUNWfxW84htwh5g GyhKVAh8mUsqFBzjBjKIk3d5y7gStqWpAbZBnthrr8dFdxXCaGyWntkJcnuvldJl fMghrAAC7V+16tDxxD4rNHk8TfXy1gJFzqQ9CAm7nAp5ax7MIwdyJ4a1yc7ARk5k ndpLPY/Kz3f1i8WSZd9VGqJRFSuLNeONiTeTiHuwYoZICOwr7ljaX3AUoKMo5gsZ fMMhDbY79rh5Xg== =6dcc -----END PGP SIGNATURE----- --=-=-=--