From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 3285E30FC08 for ; Mon, 26 Jan 2026 23:35:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769470528; cv=none; b=lrC9SohXIgCGMtpMy1ue5BQA1fNzrzX5J76NxEUkd+0R9l2XgtTIbhKvZd8TC0HLOMNW1H/bLsgvWMMrm/xYWtBqZnuX2Y9ayo77ySDJ4CF3QW8pltqpbO4vtPY4ll6hfwDc4LGQ1R2JL4XRfPHFmOlzk1pJG+kSxQ+VrZ4hrTE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769470528; c=relaxed/simple; bh=qnb5LBQI7Vm5bizve+7iWP8JE0kKDxGuA9Ev6X3Wjmg=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=QqMEOw86OPABzRhGcHSkW7yK3QkXqOLzXgfE3paAU9Sbldpayhpz7rQGUsApJJ24be1G8+LuXCMIZ+IbIe3/KK3/hwKRDf+a1kA78JHzSEYy7Do5syuqj/WI1EGmoVp+Jx9ahg7RIx/66RivXXZxVZxWR7VAGmBuGUaJZtSJpQU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=VqIj4iK1; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b=E8QSgVrz; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="VqIj4iK1"; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b="E8QSgVrz" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1769470526; 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=9/driKKzzFwHxyVCCzLpuFXIDKP/GnRcGSdVsdP9480=; b=VqIj4iK1g6d99ocltpTA2ouGh3GGQ8QogVr9K7Fvaxoc2kAFYgOW5K8jO+DCyzhlnRiHm1 HBcn1VG7jIRtEpzB9I8dx0wayYXr7mclVFwzj5F4HDuS4wUBYcqM7a4kGAcYVgtvhK75Ic 7jcc7dnk8GK1qLBK9yTUV8piqhBkq8E= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-362-HNKFU7TNPE6nhv1Lfr5fhA-1; Mon, 26 Jan 2026 18:35:24 -0500 X-MC-Unique: HNKFU7TNPE6nhv1Lfr5fhA-1 X-Mimecast-MFC-AGG-ID: HNKFU7TNPE6nhv1Lfr5fhA_1769470523 Received: by mail-wm1-f69.google.com with SMTP id 5b1f17b1804b1-4804157a3c9so53415665e9.1 for ; Mon, 26 Jan 2026 15:35:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1769470522; x=1770075322; darn=vger.kernel.org; h=mime-version:message-id:date:references:in-reply-to:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=9/driKKzzFwHxyVCCzLpuFXIDKP/GnRcGSdVsdP9480=; b=E8QSgVrzmB1maShHlLtqRER9aJuAfpZLKXqsCyzI3au2QunFRVWvRD9GMxkvzLt+oL sxrOMLQmkc9GZku9b1axm4M5N6pHqBiwjcfsOuIhEyCevOzhLPR/g09pI7hRtX9POEH0 2WD0O/e6KhVmp0gS5SgOg3mEUfVNnI2AWJSKucWkRmGshYTLYuqbvnhU9bPTWsz2fEn+ NDZJC36qyH+YSsyqREtmBdK24yB9/xsDItwGddi1OU9g8cvMj2AtvIFzOoPAl+BxbIIw 3G67mcjE9OTJnRIcYJiog5Qa8fH+I7Bik+nYij5RCWdAdM9UcH72Cly7CtuqKkH6+3UK 3JvA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769470522; x=1770075322; h=mime-version:message-id:date:references:in-reply-to:subject:cc:to :from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=9/driKKzzFwHxyVCCzLpuFXIDKP/GnRcGSdVsdP9480=; b=Cjzc6ZepIcSLCZECcqePFn1oNFOlse10CGOuhYY3RKHDmnvEWmpFAzmVbjuMjUDKK/ L12X5Qo1K1gNdL1YwJm7dqe2vjqpPeokGytQGApf7le39bMgX4YSJsKo1nrk13hvaNnU T2oZtqdvC+WODO8bxb+VDua8Nm4aA7NFUxzcKOIFIJXmxTHfqR7POFaBHSsSuel6JTGj PW/wQpCXhaIREIaTIFRtIcxIFayB6gNRjj1UbUnVH+oD+QdVqsMkJwjqjxqUgIiPAr9a nyS5EGHUuOt1OSkNUUqs0+VYsaj4LEBoRCE6eiqJVaYzy9nLNoJ7+Pbq/ht0WSA7ZHbz YUmA== X-Gm-Message-State: AOJu0Yy3Gjdy+aBp1wodeIwmvhWhiZL9TGOOXx0nHmSJ5J9/h1NMo0wc 5FJMISKgl8LbSpRgd5qoXW4ilVE6OVIgOdYl5lVEmuJAnDef2TNxCqT0fvUiR0eNPZSr4bFlxV5 ziWl1ShcIznJ9mjnvYCcrVQMBA7DAnMMnNCWBr78TTwrLahPfeupP3GdPH8SP+4Ayeg== X-Gm-Gg: AZuq6aIPoHOSNiFhJPK+eSFfB0gsQVWgp9sQsBnhU6rN8yOjQyhvEgxoEqJZnAtIewv o3r6lT05gFb71src8u4Qau8jBKDhNo3ESfmcX/R2apN1FIHCidm9L4FhB1wijDaStOanAuwhW6X zApBmwoGgNvucKnQtg7ZQk5yc71o+SwG+fPScr7aPwmjzaDN2WdSbyyfvF1ZFMXVwyvHMMz1qyN TZFw58zBmBGFh+YD5qivd38Z1rwwCA3EvEJHeuYksYAAZl1pXZO1G3UMT+IGTQ/RB3UqLNony2U wlEszPkoDA5HWQEo+7tXvUDxuNwJs8IU5Gdd7PKY5ZL5zT/t5RnHZNV6sPWBZp5mUq6sEEan8HE eLQNyYgwqQGcK7mDRPE1Edj+2HwjLTDCnRhWmB5qQhOWxVWo= X-Received: by 2002:a05:600c:34d1:b0:47a:975b:e3e6 with SMTP id 5b1f17b1804b1-4805cf6725bmr94192695e9.18.1769470522322; Mon, 26 Jan 2026 15:35:22 -0800 (PST) X-Received: by 2002:a05:600c:34d1:b0:47a:975b:e3e6 with SMTP id 5b1f17b1804b1-4805cf6725bmr94192405e9.18.1769470521967; Mon, 26 Jan 2026 15:35:21 -0800 (PST) Received: from localhost (net-37-117-189-93.cust.vodafonedsl.it. [37.117.189.93]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-435b1e715d3sm33764977f8f.28.2026.01.26.15.35.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Jan 2026 15:35:21 -0800 (PST) From: Paolo Valerio To: Andrew Lunn Cc: netdev@vger.kernel.org, Nicolas Ferre , Claudiu Beznea , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Lorenzo Bianconi , =?utf-8?Q?Th=C3=A9o?= Lebrun Subject: Re: [PATCH net-next 3/8] cadence: macb: Add page pool support handle multi-descriptor frame rx In-Reply-To: References: <20260115222531.313002-1-pvalerio@redhat.com> <20260115222531.313002-4-pvalerio@redhat.com> <4c74c2c4-7a47-45ff-be17-485e0702cc37@lunn.ch> <87cy315lru.fsf@redhat.com> <840fd286-779e-4130-b544-913116c97a29@lunn.ch> <87qzrdecs1.fsf@redhat.com> Date: Tue, 27 Jan 2026 00:34:52 +0100 Message-ID: <87o6mgeyn7.fsf@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On 26 Jan 2026 at 03:29:46 PM, Andrew Lunn wrote: >> > I was more interested in plain networking, not XDP. Does it perform >> > better with page pool? You at least need to show it is not worse, you >> > need to avoid performance regressions. >> > >> >> I retested with iperf3. The target has a single rx queue with iperf3 >> running with no cpu affinity set. >> >> | | 64 | 128 | >> | baseline | 273 | 545 | >> | pp (page) | 273 | 544 | >> | pp (2 frags) | 272 | 544 | > > So no real difference. That is unusual, it is typically faster, or if > it is always doing line rate, it uses less CPU time. That might > suggest the page pool integration is not optimal? > Thanks Andrew, I can't tell, but the same numbers were a little surprising to me as well. I'll spend some more time on this on my hw.