From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-il1-x130.google.com (mail-il1-x130.google.com [IPv6:2607:f8b0:4864:20::130]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id E18873B29D for ; Sun, 30 Aug 2020 13:53:07 -0400 (EDT) Received: by mail-il1-x130.google.com with SMTP id 16so2465159ill.6 for ; Sun, 30 Aug 2020 10:53:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=hZLuh0ketlabCIezlikIAAnFoxbdIMOko2c2ehBEd1E=; b=YcuDGygQTf1TJW5Su0kWoSS+HmNmQiHZ/AeYJyryw6MeBio3o2267Dmh/yy8obd/wk CoPUvc89GIwRFu+onJhONc0q6qG+08r/1toz+Z4mQPPOMqpZatHxnbrqlojoq1+oXq1l RjJCrgXQxGuInZdcRHGdHGri9fjx9Lm6upLOVZB2QBhga3PwZSoTok6Fj8WXQgqj7XCR k8x2/ARwMl6TxjM75QBe+bzUhfQU6SBmjXW3Rp7I+XjhByJ4aO54b3tpUpxZk1/jtavm HrD3b2iyYEH2grOeEFxuW50NTpU81XVlE8VPngpgSdJFJkBgo9uomH+7ttjK/4tyF6hl 4zSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=hZLuh0ketlabCIezlikIAAnFoxbdIMOko2c2ehBEd1E=; b=Metn7VMOQO9oQ/ba4pWpAGpsWHM8nw33MuzA1OREVvNZvr0+jyZCuZhoFw6UF2Enew tEC8ZmS3SqD7oDoG3JPkI+KEChYX1Ut+zf84f3hYIV7u92SzpxP5+3E94vK/MhHHoP9w +yYcJoNWLjop62YXGm3VbcURW+BMj37qZAhJgkozYSb9A2gPFuLKj8NaNMyWJ3VK0tVI u0dcdCwrSLxnqUCyysIZPVoHmkymgwLzJUpFLYmvuqNc2gUuL4i3EuuVDrWD11cHyRnV mR7lwS5HiEH6g0lVDmRLoOotMzL8xqb1TYWFgLJh8vjeNztqxr4JbdouRLI4M1NxrIyy cXCQ== X-Gm-Message-State: AOAM532VV7jbjiRnYw+jtdgC/UrCMoY4BjLv6DSseWIY3BXK1+AfDN5v ro2CCGGxVkJdSOZrA45NPeMjv+da50f6RwHsp5EI532m X-Google-Smtp-Source: ABdhPJyooK+OL90TR44aVFDmvCQY3rV8/eYy5hyk/sMBFGis7QJMih+ZNTotJrrEDW6IK0t5gdKt6GlD13xkYjzG8qg= X-Received: by 2002:a92:498a:: with SMTP id k10mr5880926ilg.246.1598809987257; Sun, 30 Aug 2020 10:53:07 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Sun, 30 Aug 2020 10:52:37 -0700 Message-ID: To: Mikael Abrahamsson Cc: bloat Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Bloat] CAKE in openwrt high CPU X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 Aug 2020 17:53:08 -0000 cake reschedules too much compared to the tweaks we have to keep htb fed, at these rates. It was kind of my hope to gain a hw assist in future versions of the apu series. a programmable completion interrupt is available in some versions of that chipset, On Sun, Aug 30, 2020 at 10:27 AM Mikael Abrahamsson via Bloat wrote: > > > Hi, > > I migrated to an APU2 (https://www.pcengines.ch/apu2.htm) as residential > router, from my previous WRT1200AC (marvell armada 385). > > I was running OpenWrt 18.06 on that one, now I am running latest 19.07.3 > on the APU2. > > Before I had 500/100 and I had to use FQ_CODEL because CAKE took too much > CPU to be able to do 500/100 on the WRT1200AC. Now I upgraded to 1000/100= 0 > and tried it again, and even the APU2 can only do CAKE up to ~300 > megabit/s. With FQ_CODEL I get full speed (configure 900/900 in SQM in > OpenWrt). > > Looking in top, I see sirq% sitting at 50% pegged. This is typical what I > see when CPU based forwarding is maxed out. From my recollection of > running CAKE on earlier versions of openwrt (17.x) I don't remember CAKE > using more CPU than FQ_CODEL. > > Anyone know what's up? I'm fine running FQ_CODEL, it solves any > bufferbloat but... I thought CAKE supposedly should use less CPU, not > more? > > -- > Mikael Abrahamsson email: swmike@swm.pp.se > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat --=20 "For a successful technology, reality must take precedence over public relations, for Mother Nature cannot be fooled" - Richard Feynman dave@taht.net CTO, TekLibre, LLC Tel: 1-831-435-0729