From owner-freebsd-hackers@freebsd.org Fri Nov 2 09:14:19 2018 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3879310EEC12 for ; Fri, 2 Nov 2018 09:14:19 +0000 (UTC) (envelope-from shreyankfbsd@gmail.com) Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 99E0D7EA98; Fri, 2 Nov 2018 09:14:18 +0000 (UTC) (envelope-from shreyankfbsd@gmail.com) Received: by mail-pl1-x636.google.com with SMTP id t6-v6so723308plo.9; Fri, 02 Nov 2018 02:14:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=in-reply-to:to:cc:from:subject:message-id:date:user-agent :mime-version:content-transfer-encoding:content-language; bh=0540tA0OjY6RxSYZrclse35U9zBxqAoWHJvLOC7hGaM=; b=aAJOyGmp7foZc+k0lzP1Qr7jDRfDKaAzMgMw6s9HYzAr1ivysEhW65fBvAoRd1HCxR QIBRknw4JDnh2/uzNDlpBgL11xLGg+yqM4uAfj4DTMJ12NKoNxuEwEUNi8zPpTscZofQ 5d5+F0Y1UCr8dbEqP7rjn1U3lgo38e+u3/xaZpLdDdM6Uafn3f6CAUF5JXuR2ophQpPF 3HXlFM+bmDTwt3OEVmBPdQc9brH17a8Kt0qKeHlsKOLKpz0UaaK+oqr7HNJhSm0kb1e9 +V1zqOLHB66BYswj8yolgsvl8P7/wN3KfqxsU1cV8qeyb9QmSmVtZRQZIQSf/FiMPrs+ ZeHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:in-reply-to:to:cc:from:subject:message-id:date :user-agent:mime-version:content-transfer-encoding:content-language; bh=0540tA0OjY6RxSYZrclse35U9zBxqAoWHJvLOC7hGaM=; b=blb+LHhVwmOr3zQTslPQtx1/RS+q5hvb+5+bnjmTT282HaTf/9YIJoJh0QDQTS9mW5 5D8p+ARpxP234uxWx6p8SmOj9NBFH+kSnywwGUHgbizkl0uJwjHZLUTmoOHEVpDEGrSB XY9wIZuRUxYhpcmgovaf0bMZdbtZxwJ1zHEYxd+bItBIRygbizx0eSTP+4pTG7DUp10u 2hBcHgwd2swgjT3yM044lSDIJ30pNvwPuPcVBq4ZXlXpjwN3O6jcuHQiTG5TS+n/eND8 lq8jX0zPBcQbtY0/BxWNAou31Iyzz2HX2MmF4fgClyTg5drybwvgQKRCXXamaZXA0N1F X1fA== X-Gm-Message-State: AGRZ1gLMCtUrj66gj/4e7E82pEwNZ5ZD1rkkq9niRt8DsSh1po6tG0mF WlYqEGEvw8NMcrRgXw1veDDgFrc= X-Google-Smtp-Source: AJdET5cggte95Iq0hOyhxhqvBIqXhAVtUQJOGD/hjxg0TstmenmqoFBH5iqbYO4yd+RimHvYco5g+g== X-Received: by 2002:a17:902:3341:: with SMTP id a59-v6mr10980933plc.138.1541150057351; Fri, 02 Nov 2018 02:14:17 -0700 (PDT) Received: from [10.136.129.217] ([202.56.249.162]) by smtp.gmail.com with ESMTPSA id d143-v6sm31706975pfd.58.2018.11.02.02.14.15 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 02 Nov 2018 02:14:16 -0700 (PDT) In-Reply-To: To: marius@freebsd.org Cc: freebsd-hackers@freebsd.org From: "Amartya, Shreyank" Subject: Re: Re: FW: eMMC AMD platform Message-ID: Date: Fri, 2 Nov 2018 14:44:13 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.3.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Mailman-Approved-At: Fri, 02 Nov 2018 10:15:22 +0000 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Nov 2018 09:14:19 -0000 Hi, So I was able to get the performance numbers up by increasing the default SDMA boundary value from 4k up to 512K (which is the default in linux). With the increased boundary size I saw an increase in HS200 (141 MB/s) as well as HS400 (193 MB/s) throughput as compared to earlier with both the modes (~105 MB/s). Going over the code I understand that an increase in size causes less DMA interrupts. Any specific reason to use 4K as default value? If not, is it okay to switch to 512K? Thanks Shreyank