From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x244.google.com (mail-lf0-x244.google.com [IPv6:2a00:1450:4010:c07::244]) (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 0DA683B29E; Wed, 8 Feb 2017 13:29:03 -0500 (EST) Received: by mail-lf0-x244.google.com with SMTP id v186so10092638lfa.2; Wed, 08 Feb 2017 10:29:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=cpnAopdj0SBWZAoVkXGmSibpFrHeKEyc6d+cKkrwldU=; b=TofoULQlg9CQpHNAVfaZs0R+n16+LWkDuLMFf4Ew/hpeXmDoisDsAV5anWN7gmrcgd b4mljsVph0FabeV6lY9E8KIhDlgxlrmqQD8rG55IFj+bqonZ3Kd+bm5rG6BVXNRdQk8H kXGLuDiZcDPztcC8hG6GQOUI4nsTBY95lbfgKrTAb3RRSa75j6+gHeROQxbrtLh5Gkoi 3/oKYqcasK1UJhtFWqOoheCt6+rX1uZF/kgTMXqeTbxGWRtOvW4nyHH7mGVvDGZ3vkGr Cr338tvVW28cDOpeFUd3/cNz0JGcKa8NTLPZdOIRQznyL27RQxB+39ixgGbQjpIKqbfx JJXw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=cpnAopdj0SBWZAoVkXGmSibpFrHeKEyc6d+cKkrwldU=; b=FjaYfSF9z4TQsKsa2gn/+VALk09YyVBiCcef7p+49vf/zdJW131lZSKLTOxnzf6SiJ 67+QW9sRIKPQAM9nl4wd1tcUU702R5iKdEV/HRAqoGaUgQx01xiTNM96hQQ7wBqt1nhU PxeDRnmRU+akAorvVK1ZCh5G+u/PIo9ApF/73ZiaKHuwJ3jpqzhk3dKGxwrnirzZEbSm nnNd0txx5/5R6n5VTdFVFI1bSMPtbgw5Bb8al95KHWYxfYSEz/xRhSLtAzXb0G13L1rY eKn6ERMgTUtRZFf66SzfTHB7JUdDwmJvQyjAn/he+7ynhU20/pYxhT6QoPnu/YmDxgw9 ZfGw== X-Gm-Message-State: AIkVDXIGfdKfTC9RB818yS3g3hz8oejFbJ/UZaafyP81iH7+0Nj9sJDW3ExzAAaTTNLBDosf7UnhtJ0x9u8W3g== X-Received: by 10.25.216.156 with SMTP id r28mr7020662lfi.28.1486578541899; Wed, 08 Feb 2017 10:29:01 -0800 (PST) MIME-Version: 1.0 Sender: john.yates.sheets@gmail.com Received: by 10.25.205.193 with HTTP; Wed, 8 Feb 2017 10:29:01 -0800 (PST) In-Reply-To: References: <32C42951-373F-4D90-8936-AA07039E5D73@gmail.com> <877f5c2pew.fsf@toke.dk> <878tpqge5g.fsf@toke.dk> <877f52rz68.fsf@toke.dk> From: John Yates Date: Wed, 8 Feb 2017 13:29:01 -0500 X-Google-Sender-Auth: xolBVMTljG7oozSEk5vH-yOXqlQ Message-ID: To: Pete Heist Cc: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= , cake@lists.bufferbloat.net, make-wifi-fast@lists.bufferbloat.net Content-Type: multipart/alternative; boundary=001a1140d76aebb77005480909b0 Subject: Re: [Make-wifi-fast] [Cake] Flent results for point-to-point Wi-Fi on LEDE/OM2P-HS available X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Feb 2017 18:29:03 -0000 --001a1140d76aebb77005480909b0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Wed, Feb 8, 2017 at 10:26 AM, Pete Heist wrote: > Even after the new SSA back end, they can still be large. > =E2=80=8BTake if from a long time compiler write who has nearly 30 years ex= perience working with SSA: SSA is no panacea. It is a representation that makes some optimizations easier to express and sometimes more effective. Many of the optimizations that SSA facilitates tend to raise register pressure. I can be a very delicate balancing act. Optimizing for size is a dark art. Most compiler projects invest relatively little effort in that direction.=E2=80=8B =E2=80=8B/john=E2=80=8B --001a1140d76aebb77005480909b0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Wed, Fe= b 8, 2017 at 10:26 AM, Pete Heist <peteheist@gmail.com> wrote:
Even after the new SSA back end, they can still be large= .

=E2=80=8BTake if fro= m a long time compiler write who has nearly 30 years experience working wit= h SSA: =C2=A0SSA is no panacea.=C2=A0 It is a representation that makes som= e optimizations easier to express and sometimes more effective.=C2=A0 Many = of the optimizations that SSA facilitates tend to raise register pressure.= =C2=A0 I can be a very delicate balancing act.

Optimiz= ing for size is a dark art.=C2=A0 Most compiler projects invest relatively = little effort in that direction.=E2=80=8B

=E2=80=8B/= john=E2=80=8B

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