From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [91.216.245.30]) (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 E43521F2C41 for ; Tue, 7 Jan 2025 15:54:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.216.245.30 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736265262; cv=none; b=UiYyqUywN673bgxwJxrvot1UY6GeZSuny24vDmr8KpkWNOlLBvVQSNSd1OfB+lF8qwa5Sdoxt/PuhsxuoILOh4MtpesXu5VfOWuesm9/T3h99E+8yooHOjvNqUGHopHeu7xcTXJdA6/U/wSpqzs6kT4pxOx32p81Q4K19L35P6c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736265262; c=relaxed/simple; bh=0iEB2Jsmgmytj3VPx6dL/XebtJ1N4SPMVL+eDy5GSAU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=dPiu//5fMTcJpFo+XPfqCbU2WZMKEsUwDunfFs/yIAYIWp9T7Odxy1zf03rQlJZfWDfZMJf8t266f8teQ+34ySnbik857ZFIvUDy+Ol0+drib2KuJiktSqxI696chYmRS+YksiJ+1fXTjXZlZzUMcxgAPh2ydyczdrQAaR82VBk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=strlen.de; spf=pass smtp.mailfrom=strlen.de; arc=none smtp.client-ip=91.216.245.30 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=strlen.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=strlen.de Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1tVBuE-0001F9-Dy; Tue, 07 Jan 2025 16:54:10 +0100 Date: Tue, 7 Jan 2025 16:53:43 +0100 From: Florian Westphal To: netfilter-devel@vger.kernel.org Cc: Nadia Pinaeva , Pablo Neira Ayuso Subject: Re: [PATCH nf-next] netfilter: conntrack: add conntrack event timestamp Message-ID: References: <20241115134612.1333-1-fw@strlen.de> Precedence: bulk X-Mailing-List: netfilter-devel@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: <20241115134612.1333-1-fw@strlen.de> Florian Westphal wrote: > Nadia Pinaeva writes: > I am working on a tool that allows collecting network performance > metrics by using conntrack events. > Start time of a conntrack entry is used to evaluate seen_reply > latency, therefore the sooner it is timestamped, the better the > precision is. > In particular, when using this tool to compare the performance of the > same feature implemented using iptables/nftables/OVS it is crucial > to have the entry timestamped earlier to see any difference. > > At this time, conntrack events can only get timestamped at recv time in > userspace, so there can be some delay between the event being generated > and the userspace process consuming the message. Ping, should I resend this patch?